SUBJECT /DEPARTMENT: COMPUTER SCORE : APPRECIATION OF LEVEL OF COMPETENCE (TICK)
( Indicate the competence(s) tested: )
SCIENCE
TERM/EVALUATION SEQ./DATE: SECOND NOT ACQUIRED IN THE PROCESS ACQUIRED
(0-09.5) OF (14→)
TERM EXAM, MARCH 2024. ACQUISITION
(10-13.99)
TIME ALLOWED: 1HR
CLASS : FORM 4 COEF : 2 PARENT´S OBSERVATION/SIGNATURE:
NAME : Nº:
INSTRUCTIONS
1. This paper consists of sections A and B
2. Answer all questions in all two sections and make sure you have all pages 1 to 5 available.
You are reminded of the necessity for good English and orderly presentation in your answers.
SECTION A: MCQ (20 marks)
Shade the letter corresponding to the correct answer as shown on the example below.
[A], [B], [C], [D] in this case [A] was the right answer. Each correct answer in this section
will earn you (1 mark)
1 The following are Boolean expressions except?
[A] 0 or 1 [B] True or false [C] Yes or No [D] All of above
2 Which of the following logic gate gives an output 1 only when all input are 0?
[A] NOR gate [B] NAND gate [C] AND [D] OR gate
3 What is the full meaning of GUI
[A] Graphic user interface [B] Graphical union interface
[C] Graphical user interface [D] Graphical unite interface
4 Which of the following logic gate gives an output 1 only when all the inputs are 1?
[A] NOR gate [B] NAND gate [C] AND [D] OR gate
5 An operating system that supports only one task to be carried out at a time
[A] DOS [B] Windows [C]Android [D] All of the above
6 Which type of ROM allows its content to be erased by ultraviolet light
[A] EEPROM [B] PROM [C] EPROM [D] All of the above
1
7 Antivirus is a special type of
[A] System software [B] Operating system[C] Utility software [D] All of the above
8 Pascal, Java and Basic are examples of
[A] Firmware [B] Operating system [C] Utility software [D] Programming language
9 The following is a type of system software except
[A] Device driver[B] Operating system [C] Utility software [D] None of the above
10 The term used to describe software that translate source code to object code is called
[A] Language software [B] Language translator [C] Utility translator [D] All of the above
11 Any number with an exponent of zero is equal to …………….
[A] Itself [B] Ten [ C ] One [ D ] Zero
12 How many symbols are used in hexadecimal number system?
[A] Fifteen [B] Ten [C] Two [D] Sixteen
13 The following is an example of computer memory except
[ A ] CMOS [ B ] ROM [ C ] Register [ D ] Floppy disk
14 Which of the following is a temporal memory?
[ A ] The hard disk [B] Main memory [ C ] The control unit [ D ] Read only memory
15 Which memory is refer to as main memory?
[A] Hard disk [B] ROM [ C ] RAM [ D ]All of the above
16 There are …………………….. types of ROM
[A] Three [B] Five [ C ] One [ D ] Four
17 20 The base of octal number system is ………….
[A] Ten [B] Two [C] Eight [D]Seven
18 A device that act as both input and output is……………………..
[A] Speaker [B] Hard disk [C] Monitor [D] Touch screen
19 …………………….. is an external secondary storage
[A] Storage [B] Floppy disk [C] Flash disk [D] Hard disk
20 Which of the following is odd in the list
[A] Flash [B]Hard disk drive [C] CPU [D] Compact disk
2
SECTION B: VERIFICATION OF RESOURSES
1a)Complete the table below by filling the blank spaces with the appropriate data (3 Marks)
No Base Name Symbols Number base
1 Decimal or ………… Base 10
2 Binary 0, 1
3 Base 16
4 Octal
b) Define the following terms and give one example of each (2 Marks)
i)Hardwar…………………………………………………………………………………………
………………………………………………………………………………………………….
ii)Software……………………………………………………………………………………….
…………………………………………………………………………………………………….
2)(a) Define the following terms (3 Marks)
i) Logic gate
ii) Truth table
iii) Logic circuit
b) Identify each logic gate below (4 Marks)
i) write their names above each gate
ii) Completely write down the output of each gate
c) The following questions concern the logic circuit below (2 Marks)
i)Give the output X in terms of A and B
ii) Give the output Y in terms of A and B
iii) Write the output Z in terms of X and Y
iv) Hence, deduce the output Z in terms of A and B
3
3) (a) Define the following (3 Marks)
i) Program
ii) Software
iii) Utility software
iv) Is antivirus a utility software? Explain your answer (1 Mark)
v) State the use of antivirus in a computer (1 Mark)
b) State and explain four functions of operating system (2 Marks)
