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Form 3 Computer Studies Paper 1 End of Term 3 Examination 2022

Class: Form 3

Subject: Computer Studies

Level: High School

Exam Category: Form 3 End Term 3 Exams

Document Type: Pdf

Views: 1290 Downloads: 35

Exam Summary

NAME……………………………………………………ADM NO……………………………
SCHOOL:…………………..SIGN: ………………………. DATE:…
Instructions to Candidates
 Write your Name and Index number in spaces provided above.
 This paper consists of TWO sections.
 Answer ALL questions in section A.
 Answer Question 16 and any other THREE Questions from Section B
 All answers MUST be written in the spaces provided on this question paper.

SECTION A: 40 MARKS Answer all the questions in this Section.
1.State two reasons for the increased use of Laptop computers in modern workplaces (2marks)
__________________________________________________________________________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
2. What precautions would you take in the computer laboratory incase users are complaining of overheating and suffocation (2marks)
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3.Convert the decimal number 15.373₁₀ to its binary number system equivalent (3marks)
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4.With an aid of a diagram describe the difference between Repeat Until and While… Do (3marks)
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5.State three circumstances which may force an individual to acquire an impact printer instead of non-impact printer (3marks)
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6.Sam prepared a five-page brochure of Maseno School using Ms-publisher. He wanted to insert a school badge in each page of the publication. State two methods he need to apply to execute this task (2marks)
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7.State the differencebetween ones complement and twos complement (2marks)
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8.State the function of each of the following features of an email software.
(i) Spam (1mark)
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(ii) Trash (1mark)
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9.State four benefits of cloud storage in computing (4marks)
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10. Describe the functions of the following disk management operations.
(a) Defragmentation(1mark)
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(b) Partitioning (1mark)
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11. Describe four ways through which an organization can minimize threats to it data integrity (4marks)
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_____________________________________________________________________________________ _____________________________________________________________________________________
12. Study the following three sections of code and name accordingly (3marks)
10101010110 MOV AL, 10

Chemistry 01010101010 MOV DL, 25
Biology 01000010101 MUL DL
Physics

10100010110
(a) (b) (c)
_________________________________________________________________________________________________________________________________________________________________________
13. Identify how the operating system will label the following drives in case a computer has one floppy drive, one hard disk partition into two and a DVD (3marks)
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14. Five students Jane, Beryl, Baroness, Linda, andJael scored the following marks in mathematics: 45, 76, 34, 65 and 45. The marks were recorded in cell C3 to C7. Write down the most appropriate function that can be used to give them positions so that they can be awarded in descending order(3marks)
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15. Using an example explain two main parts of an URL (2marks)
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SECTION B: 60 MARKS
ANSWER QUESTION NUMBER 16 ANY OTHER THREE QUESTIONS FROM THIS SECTION
16.
(i) Define the following terms as used in programming (3marks)
(b) Machine dependent
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(c) Bug
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(d) Syntax
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(ii) Give two reasons to justify why most programmers prefer using compilers instead of interpreters (2marks)
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(iii) Describe two limitations of machine language (2marks)
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(iv) Study the pseudo code below and design its equivalent flowchart (8marks)
Start Count=1
For count =1 to 5 Do
Get Value 1 and Value 2
If Value 1 >Value2 Then
Maximum =Value1
Else Maximum =Value2
Endif
Display Maximum
Count=Count+1
Stop
17.
(i) The five-bit number 00101 is used to represent decimal number 5, show three methods of coding for negative 5 (3marks)
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
(ii) Convert the binary number 101011110101101110001₂ into its
(a) Octal equivalent (2marks)
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
(b) Hexadecimal (2marks)
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
(iii) Convert 10101.010101₂ to decimal (3marks)
__________________________________________________________________________________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________________________________________________________________________________
(iv) Use 8-bit twos to subtract 3510 from 1710(3marks)
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(v) Perform the following calculation (2marks)
1100012+11112-111112 ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
18.
(i) Define the term desktop publishing (2marks)
______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
(ii) List three nonprinting guides used in Desktop publishing (3marks)
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
(iii) Explain the following features as used in DTP when manipulating graphical objects.
(a) Fill (1mark)
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(b) Stroke (1mark)
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(vi) Describe any three types of action queries (3marks)
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(iv) Describe the function of the following features of a query grid.
(a) Criteria(1mark)
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(b) Show (1mark)
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(v) Mention three functions of database management software (3marks)
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19.
(i) State three causes of system entropy (3marks)
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(ii) Describe three main ways of maintaining a computer-based system (3marks)
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(iii) State three advantages of using pilot changeover strategy in system development (3marks)
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(iv) State a stage in system development life cycle where each of the following activities are carried out.
(a) Identifying shortcomings of the system(1mark)
_____________________________________________________________________________________________
(b) Prepare training manuals(1mark)
____________________________________________________________________________________________
(c) Calculating the cost benefit analysis(1mark)
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(v) State three outcomes that may result from using incorrect requirement specifications during system development (3marks)
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20.
(a) Define the following terms.
(i) Downloading(1mark)
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(ii) Uploading(1mark)
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(iii) Blog (1mark)
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(b) Briefly describe how internet platform have revolutionized business operations in the 21stcentury (3marks)
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(c) Mention three emerging issues that make many people have a negative perception about internet (3marks)
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(d) Explain the following terms as used in data processing.
(i) Multiprocessing (1mark)
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(ii) Batch processing (1mark)
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(e) Explain the following types of errors.
(i) Overflow error (1mark)
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(ii) Truncation error (1mark)
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(f) Mention two application areas of real processing (2mark)
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