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Computer Studies Paper 1 Form 4 End of Term 1 Examination 2021

Class: Form 4

Subject: Computer Studies

Level: High School

Exam Category: Form 4 End Term 1 Exams

Document Type: Pdf

    

Views: 366     Downloads: 11

Exam Summary


TUTORKE EXAMS
Name…………………………………………………………………. Adm No………………
School…………………………………………………………………Signature…………….
Date…………………………………………

COMPUTER STUDIES
PAPER 1 (Theory) 451/1
TIME: 2HRS
END-TERM 1 FORM 4
1 State three Computer Laboratory precautions and measures necessary to protect the computer user. [3 marks]


2 State two reasons for system reboot. [2 marks]


3 State any five uses of computers in a university. [5 marks]


4 State the purpose of the following parts of the CPU
a) Control Unit; [1 mark]

b) Arithmetic and Logic Unit; [1 mark]

c) Main Memory; [1 mark]

5 The secretary to the Board of Management of your school wants to purchase a computer screen and has resulted to consult your advice. State any three features or terms you could recommend her to consider during the purchasing process. [3 marks]


6 List down any four hardware components you can add or upgrade in a computer. [4 marks]


7 Differentiate between Batch processing and real time processing modes. [2 marks]


8 (a) Define the term normalization as used in data base design [2 marks]


(b) State three objectives of normalization. [3 marks]


9 A worksheet contains the data shown below
Capture.JPG
State the values displayed in G1 [2 marks]


10 (a) Name two methods of paper orientation as used in DTP [2 marks]


(b) Differentiate between the following
i. Kerning and tracking [2 marks]

ii. Margins and column guides [2 mark


11 Explain one role of a computer technician [1 marks]


12 What is disk partitioning? [1 marks]


13 What is the meaning of the phrase ‘semantics’ as used with computer programming? [1 marks]


14 What is internet? [1 marks]


15 Explain the function of a bridge in computer networking. [1 marks]


Section B: Answer question 16 and any other three questions
16 (a) State two qualities of a good pseudo-code. [2 marks]


(b) With the aid of flowchart diagrams, describe each of the following programme control structures:
(i) sequence [3 marks]



(ii) selection [3 marks]


(c) Draw a programme flowchart that would accept three numbers and find their sum. If the sum is greater than 200. It adds 30 to the sum, otherwise subtracts 20 from the sum. The programme should then display the results. [7 marks]


17 (a) What is the hexadecimal equivalent of 7678 [3 marks]


(b) Use one’s compliment to represent -510 in 8-bits formation. [2 marks]


(c) State two reasons for using binary in digital technology [2 marks]


(d) Explain the role of a modem in data communication [2 marks]


(e) Describe each of the following computer terminologies as used in data representation [4 marks]
i. Word

ii. Bit

iii. Byte

iv. Nibble

(f) Convert 7.12510 to binary [2 marks]



18 i Describe three ways in which computers have positively impacted on education [3 marks]


ii a) Simulation is one of the application areas of computers. What is meant by the term simulation? [1 mark]


b) State three advantages of computer based simulation [6 marks]


iii Differentiate between a software engineer and a computer engineer. [2 marks]


iv Name three responsibilities that are carried out by a web administrator. [3 marks]


19 A school computer laboratory is scheduled to undergo major renovations. The lab is schedule to receive new computer whose specifications are given below:-
Pentium IV 2.8GHz processor
40GB HDD
3 ½ FDD
256MB RAM
56 x CD ROM
17” SVGA TFT monitor
The computers are going to be networked and will be able to browse the internet.
a Explain what is meant by the terms:-
i. FDD


ii. HDD


iii. SVGA


iv. TFT [2 marks]


b The computer is to be networked, name one extra device that should be fitted on every computer to enable this to happen. [1 mark]


c The computer is to receive internet facilities through the server on a dial; up system. Name and describe the function of a special device that needs to be connected to the server to complete the connection. [1 mark]


d i. The school has to apply star topology to link up the computer. List two advantages of this type of topology.


ii. Name the central device used to connect the computers in this topology.
[2 mark]
e List two other types of topologies that the school could have opted for. [1 mark]


f List four advantages of using a network [2 mark]


g i. Data transmission via the internet is done using a mode known as packet switching. Describe this data transmission mode.


ii. Name two other modes of transmission [3 mark]
h i. The school’s LAN is done using UTP cable. List two advantages of using this type of cable.


ii. List two advantages of using fibre cable in networking [2 mark]


iii. Data flows in the school’s LAN in a duplex manner. Discuss two other types of data transmission in network giving examples [1 mark]


20 a i. Explain three communication services offered through internet [3 mark]


ii. Describe the following internet terms
a. Links

b. URL [2 marks]

b The following is a spreadsheet relating to a farmer.
Capture1.JPG
A function = IF (B2<200, “Not Viable”, IF (B2>300, “Moderate”, IF (B2>1000, “Viable”))). Give the appropriate result returned in cells C2, C3, C4 and C [2 marks]
c Text can easily be selected using a mouse in word processing. How do you select
i. Multiple paragraph


ii. Vertical block of text [2 marks]
d List three areas where virtual reality is used. [3 marks]


e Outline three ways computers can be used to enhance marketing. [3 marks]







 

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