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KCSE 2015 Computer Studies Paper 1 with Marking Scheme

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SECTION A (40 marks) Answer ALL the questions in this section in the spaces provided.

  • State two circumstances under which warm booting of a computer may be necessary. (2 marks)
  • List six file manipulation activities that may be carried out using an operating system. (3 marks)

1 1

  • State two advantages of using portable computers. (2 marks)
  • Write the acronym MODEM in full. (1 mark)
  • Explain the purpose of a modem when connecting to the internet. (2 marks)
  • Distinguish between an assembler and an interpreter as used in programming. (2 marks)
  • State three possible causes of fire outbreak in a computer laboratory. (3 marks)
  • State three benefits of using optical magnetic reader to register candidates for an examination. (3 marks)
  • List four factors to be considered when acquiring a printer. (4 marks)
  • State three circumstances under which voice input would be preferred over other methods of data capture. (3 marks)
  • A computer technician found it necessary to disable a firewall when working on a computer system. State two reasons that may have necessitated disabling of the firewall. (2 marks)
  • State two advantages of making payments through a mobile phone. (2 marks)
  • State three reasons why it is important to define datatypes of fields in a database correctly. (3 marks)
  • Explain two uses of a system documentation in system development. (4 marks)
  • Distinguish between a systems administrator and a database administrator as used in computers. (2 marks)

SECTION B (60 marks) Answer Question 16 and any other THREE questions in this section in the spaces provided.

  • List four web programming languages. (2 marks)
  • State four ways in which a programmer can make program code easy to follow. (4 marks)
  • Draw a program flowchart to represent the following pseudocode. (9 marks) Begin While scores exist initialize sum to zero initialize counter to zero input a score increment counter by 1 Add score to sum If there are more scores to read, compute average as sum divided by counter Print the average Else input next score End if Else Print no records exist End while End
  • In the BCD number coding scheme, letter A is represented by 110001 and letter B by 110010. Determine how the word CAB is coded in BCD. (2 marks)
  • Convert the decimal number 11.125 to its binary number system equivalent. (3 marks)
  • Perform the binary arithmetic: 111.01 + 1011.111 - 101.011 and convert the answer to decimal notation. (3 marks)
  • tab stops; (2 marks)
  • section breaks. (2 marks)
  • State three documents that are used during mail merging in word processing. (3 marks)
  • State three functions of networking operating systems other than providing network security. (3 marks)
  • Explain three ways in which an operating system provides data security in a computer system. (6 marks)
  • Explain three circumstances under which observation method may be preferred during data collection. (6 marks)
  • List two techniques of acquiring electronic images to be used in a desktop publishing program. (1 mark)
  • Describe two layout guides in a desktop publishing program (DTP) that assist a user to place an object in a preferred position. (4 marks)
  • Explain three ways of ensuring that data submitted for processing is accurate. (6 marks)
  • output device; (2 marks)
  • software (2 marks)
  • Explain two ways in which the use of internet could make reporting of corruption easier. (4 marks)
  • Explain two circumstances under which the use of wireless communication would be preferred in data communication. (4 marks)
  • D2 to compute the performance factor. (2 marks)
  • E2 to display the statement ‘more remedials’ if the performance factor is less than zero, 'exempted' if the factor is greater than zero and optional remedials' if otherwise. (4 marks)
  • D8 to display the best performance factor. (1 mark)

computer studies kcse paper 1

MARKING SCHEME

SECTION A: 40 Marks

  • when computer hangs
  • when a program encounters an error
  • during the installation of new software for the installation to be complete
  • during the installation of hardware so that the drivers can be activated. (Any 2 x 1) = 2 marks
  • creation of files/folders
  • deletion of files/folders
  • moving of files/folders/drop/drag/cut & paste
  • copying of files/folders
  • viewing of files/folders
  • editing of files/folders
  • sorting of files/folders
  • renaming of files/folders
  • Hiding of files/folders (Any 6 x ) = 3 marks
  • StudentID Foreign keys  
  • StudID (2 marks)
  • They have battery that powers the devices hence can be used when where is no power.
  • They can be used anywhere because they are light.
  • They require less space.
  • Technology must be qualified. (Any 2 x 1) = 2 marks
  • Acronym MODEM in full Modulator Demodulator/modulation demodulation (1 mark)
  • Purpose of a Modem Convert digital signals to analog format before transmission; and incoming signals from analog to digital before processing. (2 marks)
  • Assembler: Translators that convert assembly language codes into machine code. (1 mark)
  • Interpreter: Translators that convert high level language source code into machine code. (1 mark)
  • Electrical faults;
  • Natural causes e.g lightening;
  • External attacks e.g arsonists/terrorists;
  • Inflammable material;
  • Accidents. (Any 3 x 1) = 3 marks
  • Helps in minimizing human errors during data input/has high accuracy;
  • It hastens capturing of candidates data /is faster;
  • Cheaper, since it reduces the need for human intervention;
  • Can be used for bulk processing. (Any 3 x 1) = 3 marks
  • Initial cost;
  • Print quality (Number of pixels);
  • Running cost;
  • Speed of the printer;
  • Whether coloured or black & white;
  • Paper size;
  • Nature of work.
  • Volume of work
  • Technology involved eg. printing from storage media. (Any 4 x 1) = 4 marks
  • When the hands of the user are engaged;
  • When the user has physical disabilities;
  • When faster input is required;
  • When the user is not good in keying skills. (Any 3 x 1) = 3 marks
  • Testing the communication link;
  • When upgrading the firewall;
  • When there is a need to install an application and the firewall is preventing the operation;
  • When the firewall prevents legitimate communication. (Any 2 x 1) = 2 marks
  • Easier payment of bills (No queuing)/saves time;
  • Cheaper (qualified);
  • Transactions over wide geographical space;
  • Relatively secure due to audit records. (Any 2 x 1) = 2 marks
  • Memory use optimisation when the program is loaded;
  • Assist in trapping errors during data input;
  • So that appropriate computation can be performed;
  • Increase speed of processing. (Any 3 x 1) = 3 marks
  • Technical manual referred to during system maintenance;
  • User training: it has details of how the system works and used hence used for training new users;
  • System progress: the document assists in the tracking of flow from one stage to the next;
  • User guide that helps a system user to solve problems since the document outlines how the system is operated and the errors that are likely to occur/installing programs. (Any 2 x 2) = 4 marks
  • Systems administrator is responsible for all parts of computer network such as user accounts, computer accounts, domain trusts, email accounts;
  • Database administrator deals with only aspects of database such as database server and client software, (2 marks)

SECTION B : 60 Marks

  • HTML - Hyptertext Mark-up Language
  • Java script
  • VBScript - Visual Basic script
  • XML - Extensible Markup Language
  • PHP - Hypertext Preprocessor
  • SQL - Structured Query Language
  • Dream weaver
  • Front page (Any 4 x 3) = 2 marks
  • Using modules or short blocks of program/functions/procedures;
  • Making internal documentation / comments;
  • Using meaningful variable names and user words in the program;
  • Using indent to represent nested statement;
  • Using blank lines to separate blocks of code statement;
  • Test formatting of reserved words eg. bolding(Any 4 x 1) = 4 marks

2 1

  • CAB is 110011 110001110010 (2 marks)
  • Arithmetic operations 111.01 + 1011.111 10011.001 - 101.011   1101.110 (1 x 2 3 ) + (1 x 2 2 ) + (0 x 2 1 ) + (1 x 2 0 )+(1 x 2 -1 ) + (1 x 2 - 2 ) = 13  3 / 4  (3 marks)
  • Tab stop: when tab stops are set, they allow aligning of text into columns; (2 marks)
  • Section breaks: Allows splitting of a document into different sections so that different formatting styles can be applied to the different sections. (2 marks)
  • Main document - primary/secondary data source
  • The address list - the intended recipients of the document.
  • The merged document - final document ready for printing or sending. (3 marks)
  • Provide access to network resources;
  • Supporting network services like protocols;
  • Support communication;
  • Respond to requests from applications; (Any 3 x 1) = 3 marks
  • Access control: Deals with the problem of verifying /authenticating the identity of a user before permitting access to the request resource (e.g. use of passwords, user account);
  • Encryption - Transforming data into an unreadable format so that they are safely transmitted;
  • Firewalls - Filters out unwanted data and programs/criminals/hackers/malicoius persons;
  • Log files - A means by which transactions in a computer system can be recorded thereby detering potential infiltrators;
  • Alerts - Alerting a user when he/she is about to delete a file/folder. (Any 3 x 2) = 6 marks
  • When the subjects that are being observed need not be made aware of the fact;
  • When there is need to directly see what subjects do rather than rely on what they tell you;
  • When there is need to collect data without interfering with the working of the subjects;
  • When nature of data can only be collected via observation e.g. traffic flow;
  • When collecting data in situation that subjects may be unwilling to give information. (Any 3 x 2) = 6 marks
  • Picture capture via camera;
  • downloading;
  • getting from secondary storage. (Any 2 x ) = 1 mark
  • Ruler guides: a ruler on the edges of the page that guides a user to position objects and resize them;
  • Margin guides: used to define page margins so that the user will be prevented from placing objects in non-printable areas of the page;
  • Column guides: Vertical lines used to divide a page into two or more columns;
  • Row guides: Lines used to divide a publication page into two or more section to help structure the layout;
  • Snap points: Positions on the screen where the object is stuck on. (Any 2 x 2) = 4 marks
  • Data is stored in secondary storage in such a way that access to it is controlled.
  • Encrypting of data before it is transmitted to minimize chances of it being compromised during transmission.
  • Use of validation methods to ensure that data is correct at the point of input.
  • Use of direct data capture methods which eliminates human errors. - Use of verification methods. (Any 3 x 2 ) = 6 marks
  • Output device: A plotter because it prints large size drawings to high precision. (2 marks)
  • ACAD software because it facilitates in the design of engineering drawings. (2 marks)
  • Interactiveness: the internet based technology enables real-time dialogue hence instantaneous reporting of cases;
  • Outreach: the technology allows the coverage of wide areas/can be reported from anywhere;
  • Social mobilisation: It is easy to use technology to create a network with people or organisations with similar concerns;
  • Anonymity: With use of the technology, it has become easy to report corruption cases without being known;
  • Security: The message sent reaches the destination with less risk of being intruded. (Any 2 x 2) = 4 marks
  • When the targetted recipients are many and diverse e.g. different platforms, devices, geographical locations.
  • When the sender or receiver is mobile and it in practical to use wired media.
  • When there is no space or it is inconvenient to lay cables e.g in a congested town.
  • When the distance of travel is very big e.g extraterestial communication. (Any 2 x 2) = 4 marks
  • (C2 - B2)/B2 (2 marks)
  • If (D2 <0, “More remedial”, If (D2 = 0, "Optional”, “Exempted")) remedials OR If (D2>0,"Exempted””Optional remedials”) Use of the IF function First selection & output Second selection & output Last selection & output (4 marks)
  • = Max (D2:D7) (1 mark)

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Computer Studies Paper 1 Question Paper Sort by: Number   Topics

Section a (40 marks).

Distinguish between parallel and serial cables

Differentiate between Error Handling and interrupt handling

Name four malicious programs that can affect your computer system

What is meant by expert systems? Name the three components

Name two ways of editing cell entries in spreadsheets.

Describe TWO roles of each of the following; (a) Database Administrator (2 marks)

(b) System analyst (2 marks)

(a) Describe two facilities offered by email software such as Ms Outlook. (2 marks)

(b) Name other two email softwares available in the market? (1 mark)

State the functions of the following protocols; (2 marks)

What is meant by World Wide Web?

Explain the difference between Gas Plasma Display and Liquid Crystal display Monitors

State the purpose of the following field properties in a Database management software

(a) Input Mask

(b) Validate Rule

Differentiate between logical and syntax errors encountered in programming

What is a computational error? Give an example to illustrate

Anita was working on her computer studies project. She was worried of the media to use for storing her data.

She settled on a media that used serial file organization. How are files organized on a storage medium using this method?

List two advantages offered by this type of file organization

Define the following terms in relation to computer security: (6 mks)

a) Data Encryption

_______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________

b) Sabotage

_______________________________________________________________________________________ _______________________________________________________________________________________

c) Firewall

SECTION B (60 Marks)

a) Generate output for the following pseudo code (4mks)

WHILE X<4

DO PRINT (X) X=X+1 Y= X +2

ENDWHILE PRINT (“DONE’,X)

b) Draw a flowchart for the above pseudo code (4 mks) _______________________________________________________________________________________

b) List any four components of Requirement specification made during system development (2 mks) _______________________________________________________________________________________ _______________________________________________________________________________________ c) Describe three kinds of program documentation used in program development (6 mks) _______________________________________________________________________________________

The information below is maintained by Jesica Fruit store. Study it and answer the questions that follow:

a) Describe the field data types used in the database above (4 mks) _______________________________________________________________________________________

b) Provide query statements you can use to list the following;

i) Product names starting with letter P. (2 mks) _______________________________________________________________________________________

ii) Value per unit below 200. (2 mks) _______________________________________________________________________________________

i) List and describe four areas of application of spreadsheets. (4 mks) _______________________________________________________________________________________ _

ii) Explain Data range, legend and axis as used in spreadsheet charts. (3 mks) _______________________________________________________________________________________

a) What is automated production. List two advantages and two disadvantages of automated production (5mrks) _______________________________________________________________________________________

b i) Name three ways of representing signed binary numbers (3 mks) _______________________________________________________________________________________

ii) Convert 5D616 to Binary (2 mks) _______________________________________________________________________________________

iii) Describe any four activities that take place during implementation stage of a system (4 mks) _______________________________________________________________________________________

d) Define the following terms as used in DTP software (1 mks) i) Cropping _______________________________________________________________________________________

a) State and explain any four operating system disk management utilities (8 mks) _______________________________________________________________________________________

b i) What is system maintenance? (2 mks) _______________________________________________________________________________________

ii) Define the following terms in relation to computer software (3 mks)

a) Freeware

_______________________________________________________________________________________

b) Propriety

c) Open source

iii) List any four likely causes of data and program loss in a computer system? (2 mks) _______________________________________________________________________________________

a) With the aid of a diagram explain the following network typologies (6 mks)

i) Ring topology.

_______________________________________________________________________________

ii) Bus topology

______________________________________________________________________________

iii) Star topology

b) Define the following terminologies in relation to networking (4 mks)

i) Crosstalk

iii) Attenuation

iv) Frequency

c) State two advantages of wireless communications (4 mks) ______________________________________________________________________________

d) List down one major advantage of networking. (1mk) _______________________________________________________________________________________

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computer studies kcse paper 1

Kenya Certificate of Secondary Education

2020 Computer Studies – Paper 1 Questions

Answer all questions in this section

1. Outline three distinctions between a super computer and microcomputer. [3 marks]

______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________

2. State four features of fifth generation computers. [4 marks]

3.(a). Explain two uses of forms in database design. [2 mark]

(b). i). Define the term control as used in report and form design. (1 mark)

______________________________________________________________________________ ______________________________________________________________________________

(ii). Explain briefly the difference between bound and unbound controls. ( 2marks)

4. State any two differences between function keys and special keys of a keyboard. [2 marks]

5. In system development, testing is one of the critical stages. Give three reasons why the testing phase is critical to the systems developer. [3 marks]

______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________

6. Write the following abbreviations in full. [3 marks]

iii). EBCDIC

7. State two properties that an operating system display about a file. [1 mark]

8. Differentiate between Computer Aided Design CAD and Computer Aided Manufacture (CAM). [4 marks]

9. (a). Distinguish between a primary key and index key as used in databases. [2 marks]

(b). Explain the relevance of foreign key in a database entity. (1 mark)

10. List three differences between laser printer and a dot matrix printer. [3 marks]

11. Name an input or output device used in the following tasks. (2 mark)

a). Capturing still images

________________________________________________________________________

(b). Printing detailed architectural designs

(c). Playing flight and driving games

(d). Capture data at ATM

12. What is the use of the search and replace feature in a word-processor. (1 mark)

13. State two ways in which a computer may be used in efficient running of a hospital. (2 marks)

14. The formula = $A4*C$3 was entered in cell D4. What will be the formula if it is copied to cell F10. [1 marks]

15. Name any three methods that can be used to test a program of errors. (3 marks)

SECTION B [60 MARKS

Answer question 16 and any other three questions from this section.

16.[a]. Design a flowchart for a simple program that can be used to categorize people according to age. If the person is above or equal 18 years, output “Adult” otherwise output “Young”. (8 marks)

(b).What is the difference between looping and selection? (2 marks)

[c]. Name the stage of program development cycle when: [2 marks]

(i). A user guide would be written

______________________________________________________________________________

(ii). A programmer dry-turn the code

(iii). System charts would be drawn

(iv). Staff training is done

(d). State the three translators used in programming. (3 marks)

17.(a). Define the term data communication. (1 mark)

(b). Explain the following terms as used in data communication. (2 marks)

(i). Bandwidth

(ii). Attenuation

(c). Explain the following three types of computer networks. (3 marks)

(d).i). What are robots? (1 marks)

(ii). Outline any four advantages of using robots in industries over human beings. (2 marks)

(e). Describe the following communication modes giving an example in each case. (6 marks)

(i). Simplex

(ii). Half duplex

(iii). Full duplex

18. [a].List two characteristics of good information. [2 marks]

._____________________________________________________________________________ ______________________________________________________________________________

(b(i). What is a database management system? [1 mark]

(ii). State and explain three database models. (3 marks)

c). Describe the following types of files. (i). Master file (2 marks)

(ii). Backup file (2 marks)

(iii). Transaction file (2 marks)

d). Explain the file organization methods given below. (i). Serial (1 mark)

(ii). Indexed sequential (1 mark)

(iii). Random (1 mark)

19. (a). A shopkeeper of a small shop at Long is a has bought desktop computer to assist him in performing his business activities. He has been advised that before he can use it to work he has to install it with an operating system. State any six factors to consider when choosing the operating system. [6 marks]

______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________

b). With reference to disk management explain what is meant by the terms below. i). Formatting (1 mark)

ii). Defragmentation (1 mark)

iii). Disk partitioning (1 mark)

c). Give any two reasons that may make the shopkeeper to partition the computer disk. [2 marks]

(d). The shopkeeper one day switched on the computer and experienced a number of problems with windows operating system that he had installed. The problems included failure to load the operating system during the booting. After several trials of switching on the computer, it hangs

State any four possible causes for the computer’s behaviour. (4 marks)

20. (a) Describe the octal number system. (2 marks)

(b). Convert each of the following to the number system indicated: i). 111.1012 to decimal; (3 marks)

(ii). 14.687510 to binary [4 marks]

(c). Convert the number -1710 into 8-bit: (i). signed magnitude representation; (2 marks)

(ii). two’s complement (2 marks)

(d). Perform the arithmetic operation. (2 marks)

110.112 + 11.011

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Free Computer Studies notes, revision questions, KCSE past Papers, Exams, Marking Schemes, Topical revision materials, Syllabus and Many more

Free Computer Studies notes, schemes, lesson plans, KCSE Past Papers, Termly Examinations, revision materials and marking schemes.

Computer Studies is an Applied & Technical Subject that is examined by the Kenya National Examinations Council, Knec. The subject is elective for students sitting the Kenya Certificate of Secondary Education, KCSE. Computer studies comprises of three (3) papers. These are: Computer Studies Paper One (451/1) that is a theory paper and Computer Studies Paper Two (451/2) which is a Practical examination. On the other hand, Computer Paper three (451/3) is a project based examination.

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To sharpen computer studies skills and gain requisite knowledge a lot of reading is desired. Sine the world has moved to utilization of digital technology, it is thus prudent that one acquires Computer studies resources in electronic format.

Here are links to the most important news portals:

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ou can at the same time get unlimited resources for all subjects by clicking on this link;  Teachers’ Resources Hub.

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  • COMPUTER KCSE PAST PAPERS PAPERS
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  • 2019-KCSE-Computer-Studies-Paper-2
  • FORM ONE COMPUTER NOTES-1
  • FORM ONE COMPUTER NOTES
  • FORM ONE COMPUTER NOTES(1)
  • form-1 COMPUTER NOTES–all-chapters
  • form-2-computer NOTES
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  • form-4 COMPUTER–all-chapters
  • Topical Revision Qns – Computer Studies (Paper 1)

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computer studies kcse paper 1

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  • Sat. Feb 17th, 2024

2023 KCSE Prediction Mocks- Free Download

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COMPUTER STUDIES Paper1 Questions and Answers

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GET THE KCSE PREDICTION  COMPUTER STUDIES  P1 MARKING SCHEMES HERE

 section a (40 marks) kcse prediction  computer studies  p1.

Answer ALL the questions in the section in the spaces provided.

1) Describe the following input/output terms as used in computer systems. Give an example for each                                                                                                                                                    (3marks)

  a) Read

…………………………………………………………………………………………………………….

  b) Write

2) Using relevant examples distinguish between a formula and function.                             (3marks)

…………………………………………………………………………………………………………………….

3) A publisher intends to use a desktop publishing programme to create a publication which is to have many graphics. State three ways in which the graphics may be acquired for this purpose.                        (3 marks)

4. The management of an organisation intends to purchase a printer. State three factors that they should consider during the purchase                                                                                                              (3 marks)

5. State three reasons why it is important to define data types of fields in a database correctly.       (3 marks)

6. An engineering company requires a computer system to design roads and bridges.         (2 marks)

Explain one suitable choice for:

(i) output device;

(ii) software. ​

7. State three circumstances under which the use of wireless communication would be preferred in data communication.                                                                                                                       (3 marks)

8. Headache, back and neck pain may result from the use of computers. State how each of them can be minimized                                                                                                                                           (2 marks)

(a)Headache

(b) Back & Neck Pain

9. Explain the importance of each of the following in word processing:

(i)         tab stops;                                                                                                                     (2 marks)

(ii)       Section breaks.                                                                                                            (2 marks)

10. State three problems associated with using e-mail technology for communication         (3 marks)

11. State two ways in which each of the following can be prevented

(a)        Software errors                                                                                                            (1 mark)

(b) Computer fraud                                                                                                                 (1 mark)

12. Differentiate between analogue data and digital data as used in computers                    (2 marks)

13. State four properties that an operating system displays about a file                                (2 marks)

14. State the functions of each of the following keys on the computer keyboard                  (2 marks)

(a)        backspace;

(b)        insert (ins)

15. Give three file organization methods in a computer                                                        (3 marks)

SECTION B (60 Marks) KCSE PREDICTION  COMPUTER STUDIES  P1

Answer question 16 and any other THREE questions from this section in the spaces provided.

16.(a) State three ways in which a programmer can make program code easy to fol1ow                 (3 marks)

(b)  Study the flowchart below and use it to answer the questions that follows;

computer studies kcse paper 1

(i) State the output of the above program flowchart for the inputs given below                   (3 Marks)

Amount = 15,000, 14,000 and 23,000 respectively

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

(ii) State the purpose of the flowchart                                                                                        (1 Mark)

……………………………………………………………………………………………………………

……………………………………………………………………………………….……………………

(iii) Write a pseudocode for the flowchart in question (16. c) above                                     (8 Marks)

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

17. (a) Interpret each of the following spreadsheet formula:

​(i) = countif(A2:A9, “>=E7”)                                                                                                             (2 marks)

​(ii) =sumif(B2 :B10, “WP”, D3 :D11)                                                                                               (2 marks)

(b) The figure below shows relationships between tables in a database.

computer studies kcse paper 1

Identify two primary and two foreign keys used in the relationship.                                     (4 marks)

…………………………………………………………………………………………………………………….(c)(i) Convert the hexadecimal number C7D 16 to its equivalent decimal number                         (2 Marks)

(ii) Using the twos compliment and 8-bit notation subtract 27 from 12 leaving your answer in binary notation                                                                                                                                   (5 Marks)

18.       (a) Explain three circumstances under which observation method may be preferred during data

collection                                                                                                                     (6 marks)

            (b) Describe each of the following types of maintenance

            (i) Perfective;                                                                                                              (2 marks)

            (ii) Corrective;                                                                                                            (2 marks)

            (iii) Adaptive.                                                                                                             (2 marks)

            (c) Name three approaches that may be used to replace an old system with a new computerized system                                                                                                                                                (3 marks)

19. (a) With the aid of a diagram, describe the time sharing mode in computer data processing (5 marks)

(b) A company’s management has opted to use computers to process data. State four factors that the management needs to consider when selecting the company data processing mode.            (4 marks)

(c) Describe each of the following validation checks as used in data processing

(i) Preserve check                                                                                                                   (2 marks)

(ii) Data type check                                                                                                                 (2 marks)

(iii) Check digit                                                                                                                      (2 marks)

20. (a)State the function of each of the following

(a) Network Interface Card                                                                                                   (1mark)

(b) modem                                                                                                                              (1 mark).

(c) Repeater                                                                                                                            (1 mark)

(d) Crimping tool                                                                                                                    (1 mark)

(b) State any two reasons why the fibre optic cable is preferred for data transmission over the other cables                                                                                                                                                 (2 marks)

………………………………………………………………………………………………………………….

(c) State three functions of networking operating systems other than providing network security.  (3 marks)

 (d) A company has three branches X, Y and Z where X is the headquarter. The local area network (LAN) at X is directly connected to the LAN at Y and directly to the LAN at Z. Explain two benefits of having the LAN at Y also directly connected to the LAN at Z.                                                                           (4 marks)

(e) The figure below shows a network topology . use it to answer the questions that follows:

computer studies kcse paper 1

(i) What is the name of the topology?                                                                                    (1 mark)

(ii) What is the work of the part labelled T.                                                                           (1 mark) ………………………………………………………………………………………………………………….

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computer studies kcse paper 1

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KCSE 2020 COMPUTER STUDIES PAPER 1

Section a (25mks).

  • Optical Mark Reader OMR
  • Magnetic Ink Character Reader
  • Bar Code Reader
  • Optical Character Reader
  • The flash dsik may introduce viruses into the computer leading software and hardware damage
  • Pirated software may be transferred and installed in the computers leading to copyright infringement
  • Confidential information may be copied and disclosed to unauthorised people
  • Students may install unauthorised games that may hinder learning
  • Interface cables are used to connect computer devices and peripherals while power cables transmit power from to socket to the computer
  • OS allocates and de-allocate tasks to CPU
  • It identifies interrupt from critical events and passes the control to Interrupt Service Routine which handles the condition raised by the use of priority in the queue
  • Corel WordPerfect
  • Google Docs
  • Lotus word pro.
  • Microsoft Word.
  • Work pages.
  • MS Publisher
  • Adobe Indesign
  • Adobe Page Maker
  • Corel Ventura
  • QuarkXpress
  • Installing of filtering and monitoring software
  • Intall remote monitoring software to monitor children activities over the internet
  • Set rules on usage of internet and social media e.g in presence of parents
  • Install firewall
  • Install mature content filtering software
  • Install browsers made for children or use parental control feature on browser to restrict site the children can visit
  • Keeping the data in encrypted form
  • Use passwords to deter unauthorized users
  • Keeping of audit trail
  • Installing intrusion detection systems
  • Installing firewall

computer studies kcse paper 1

  • Refer data processing in which data is manipulated in different processors/computers located in separate locations but are on the same network

computer studies kcse paper 1

  • Telecommuting will be possible hence reduces stress due to commuting inconveniences e.g traffic jams
  • Sharing of network resources and data will be possible reducing the cost of purchasing hardware or software
  • Cheaper and efficient communication i.e faster communication at a lower cost
  • Sharing of internet reduces cost of purchasing internet connectivity gadget for each employee
  • Use of debugging utilities
  • Use of test data

computer studies kcse paper 1

  • The CPU can only understand and execute machine code
  • Shield twisted pair cables are less susceptible to Electromagnetic Interferences
  • It is less expensive over short distances
  • It is flexible and light weight

(b) Charles has linked five computers at his home using star topology 2mks

  • There is no disruption to the network when adding or removing a component
  • The communication is very fast since each computer on the network has a direct line to the server
  • Failure in a node does not affect the entire network
  • It is easily to detect fault in the network
  • It enables central management of the network
  • Modem - modulates and demodulates the signals
  • Router- Connects the network to external networks
  • ISP- provides internet to the network at a cost
  • Internet Software- Internet protocol enables computers on a network to communicate
  • Finger print matching systems are used to detect crimination
  • CCTV footages can be used to trace criminalst
  • Platforms for online reporting of crime have been developed
  • = AVERAGE(C4:C38)
  • =COUNTIF(C4:C38, ">50")

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KCSE Past Papers 2016 Computer  Studies Paper 1

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computer studies kcse paper 1

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computer studies kcse paper 1

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  1. KCSE Past Papers 2020 Computer Studies Paper 1

    Kenya Certificate of Secondary Education. 2020 Computer Studies - Paper 1 Questions. Section A. Answer all questions in this section. 1. Outline three distinctions between a super computer and microcomputer.

  2. Free Kcse 2021 Past Papers for Computer Studies Questions, Answers and

    FREE KCSE 2021 PAST PAPERS FOR COMPUTER STUDIES QUESTIONS, ANSWERS AND REPORTS 2/6/2022 0 Comments FREE KCSE 2021 PAST PAPERS FOR COMPUTER STUDIES QUESTIONS, ANSWERS AND REPORTS kcse_2021_computer_paper_1_qns.pdf Download File kcse_2021_computer_paper_2_qns.pdf Download File kcse_2021_computer_studies_paper_1_qns.pdf Download File

  3. PDF 451/1

    KASSU JET Kenya Certificate of Secondary Education 451/1 - COMPUTER STUDIES - Paper 1 (THEORY) June. 2022 - 2 Hours Name......................................................................Index Number................................ Candidates Signature..........................................

  4. PDF KCSE 2022 Computer PP1

    KCSE 2022 Computer PP1 THE EXAMINATIONS COUNCIL Kenya Certificate of Secondary Education Paper 1 451/1 Name COMPUTER STUDIES (Theory) 2022 - 21/2 hours Index Number Date Candidate's Signature Instructions to candidates (a) (b) (c) (d) (g) (h) (i) Write your name and index number in the spaces provided above.

  5. KCSE 2015 Computer Studies Paper 1 with Marking Scheme

    SECTION A (40 marks) Answer ALL the questions in this section in the spaces provided. State two circumstances under which warm booting of a computer may be necessary. (2 marks) List six file manipulation activities that may be carried out using an operating system. (3 marks) Figure 1 shows relationships between tables in a database.

  6. 451/1 COMPUTER STUDIES Paper 1 (THEORY) Time 2 ½ HOURS

    COMPUTER STUDIES Paper 1 (THEORY) Time 2 1⁄2 HOURS Kenya Certificate of Secondary Education (K.C.S.E) 451/1 COMPUTER STUDIES Paper 1 (THEORY) Time 2 1⁄2 HOURS INSTRUCTIONS TO CANDIDATES Write your Name, Index Number and School in the spaces provided above This paper consists of Two sections A and B.

  7. Computer Studies Paper 1 Question Paper

    Download Free 2016 KCSE Free Marking Schemes and Past Papers for revision in Kenya. 2016 KCSE MOCK and Joint Evaluation Tests Marking Schemes and Past Papers are also available for free download. ... Computer Studies Paper 1. SECTION A (40 Marks) 1. Distinguish between parallel and serial cables . 2 marks. 2.

  8. PDF Computer Studies Papers 1

    unsuitable computer desk. (4 marks) vIt could lead to back problems if the desk is of an unrealistic height. vIf it does not provide good positioning of the monitor, it could result in eye strain. vWrist problems will arise if the keyboard and mouse seating positions are bad. vInjury as a result of falling computer components due to weak computer

  9. KCSE Past Papers 2020 Computer Studies Paper 1 (451/1)

    1 KCSE Past Papers 2020 Computer Studies Paper 1 (451/1) September 1, 2022 MJ Kenya Certificate of Secondary Education 2020 Computer Studies - Paper 1 Questions Section A Answer all questions in this section 1. Outline three distinctions between a super computer and microcomputer. [3 marks]

  10. PDF COMPUTER STUDIES PAPER 1 KCSE 2011

    4.11.1 Computer Studies Paper 1 (451/1) SECI'ION A (40 marks) Answer alt the questions in this section in the Spaces provided. The text in the box below Was cornlx)sed using a wordprocessor. The current cursor position is ... computer-studies-questions-paper-1-kcse-2011 Author: SNK

  11. Kcse Past Papers 2019: Computer Studies Paper 1 Q & a (451/1)

    KCSE PAST PAPERS 2019: COMPUTER STUDIES PAPER 1 Q & A (451/1) 25/10/2022 1 Comment THE KENYA NATIONAL Examinations COUNCIL Kenya Certificate of Secondary Education COMPUTER STUDIES (THEORY) 451/1 [Paper I] Nov. 2019 2 hours 30 min Name __________________ Index Number ________________ Signature ________________ Date ______________

  12. Free Computer Studies notes, revision questions, KCSE past Papers

    Computer Studies is an Applied & Technical Subject that is examined by the Kenya National Examinations Council, Knec. The subject is elective for students sitting the Kenya Certificate of Secondary Education, KCSE. Computer studies comprises of three (3) papers. These are: Computer Studies Paper One (451/1) that is a theory paper and Computer Studies Paper The best site for education, TSC ...

  13. COMPUTER STUDIES Paper1 Questions and Answers

    SECTION A (40 marks) KCSE PREDICTION COMPUTER STUDIES P1 Answer ALL the questions in the section in the spaces provided. 1) Describe the following input/output terms as used in computer systems. Give an example for each (3marks) a) Read ……………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. b) Write

  14. Computer Studies

    Computer Studies. February 14, 2020. KCSE Computer Studies Syllabus PDF. Components of a Spreadsheet Form 2 Computer Notes. Computer Form One Text Book. High School Computer Form 2 Notes. Secondary School Computer Notes and Revision Questions. High School Computer Notes Form 1-4. Secondary School Computer Notes Form 1.

  15. PDF KCSE TRIAL 2021 COMPUTER STUDIES PAPER 1

    Compiled & distributed by Schools Net Kenya, P.O. Box 15509-00503, Nairobi | Mob: 0734579299 E-mail: [email protected] | ORDER ANSWERS ONLINE at www.schoolsnetkenya.com (ii) Outline the benefits of using binary number complementation in computers.

  16. 2021 KCSE Past Papers with Marking Schemes

    On this page, you can download all the 2021 K.C.S.E Past Papers by KNEC, the Kenya National Examination Council. The past papers list includes all the 2021 KCSE Question Papers with their Marking Schemes. The 2021 KCSE Examination was conducted in March 2022 as a result of interference of the normal Kenyan school calendar due to the Covid-19 ...

  17. PDF COMPUTER STUDIES PAPER 1

    (1 mark) Describe how information about patients who registered after 09/08/06 can be extracted from the database. Explain how data in a computer system is secured using: (i) password; (ii) user access level. State three characteristics of a suitable password. State two characteristics of a computer that is infected by computer viruses. (3 marks)

  18. KCSE Past Papers 2018 Computer Studies Paper 1 (451/1)

    2018 Computer Studies - Paper1 1. State two reasons for the increased use of laptop computers in government offices. (2 marks) 2. Computer network technicians prefer to use command-line based operating system when configuring networks. State three reasons for the preference. (3 marks) 3.

  19. KCSE 2021 Computer studies paper 1

    KCSE 2021. INSTRUCTION TO CANDIDATES. This paper consists of two sections; A and B. Answer question 16 and any other three questions from section B. All answer should be written in the spaces provided on the question paper. Q1. 1. State two ways in which a computer may be used in a healthcare sector other than record keeping. Patient monitoring.

  20. Kcse 2020 Paper 1 Computer Studies

    (b) Computer studies subject has become an essential components of many professions. State three benefits of computer knowledge to an engineer 3mks (c) A school opted to provide internet to users in the school through the use of wireless technology.

  21. Free KCSE Past Papers Computer Studies

    Computer Studies KCSE past papers from 1998 to last year and all for free. More to be added to capture earlier years and latest updates. Keep checking for more. KCSE C.S PAST PAPERS 1998 - 2005 1998_-_2005_q-atikaschool-quiz-computer.pdf Download File 1998_-_2005_ms-atikaschool-mkschm-computer.pdf Download File KCSE C.S PAST PAPERS 2006

  22. KCSE Past Papers 2017 Computer Studies Paper 1

    19. (a) A school has been advised to employ a database administrator. State three responsibilities of this personnel in the school. (3 marks) (b) Explain two ways in which computers can be used in the transport industry. (4 marks) (c) Mary was advised to partition a hard disk for her computer.

  23. KCSE Past Papers 2016 Computer Studies Paper 1

    2016 Computer Studies - Paper 1. Questions and Answers. No. 1. (a) State the meaning of the term disk defragmentation as used in computers. (1 mark) The process of rewriting parts of a file to contiguous sectors on a disk.