MID TERM TEST FIRST TERM ICT SS 2

FIRST TERM MID TERM TEST 

                             SUBJECT: I C T    CLASS:  S.S.S 2     Time: 

1. __________ gate is the combination of OR gate and NOT gate (a) EXOR (b) EXNOR (c) NAND (d) NOR 
2. _________ gate is the combination of AND gate and NOT gate (a) EXOR (b) EXNOR (c) NAND (d) NOR
3. ________ is refers to as the brain of the computer (a) Memory (b) CPU (c) Secondary memory 
4. _________ holds data that computer is currently working on (a) RAM (b)ROM (c) Secondary memory (d) Memory unit 
5. _________ is the internal memory of the computer (a) Secondary memory (b) Primary memory (c) Memory Unit (d) ROM
6. ________ memory is the backup memory (a) Secondary memory (b) Primary memory (c) Memory (d) Rom
7. The encircled plus sign is used to show _______ operation (a) EXNOR (b) NOR (c) EXOR (d) AND 
8. ______ Memory is volatile in nature (a) Primary memory (b) Memory unit (c) Secondary memory (d) Storage device 
9. The CPU of PC are implemented on a single chip called _________ (a) Rom (b) RAM (c) Microprocessor (d) System unit 
10. The component of CPU includes the following except (a) Memory unit (b) logic unit (c) Arithmetic logic unit (d) Control unit 
11. )_______ is refers to as the external memory (a) Primary memory (b) RAM (c) ROM (d) Secondary memory
12. A disk content that is recorded at the time of manufacture and that cannot be changed or erased by user is (a) Memory only (b)write only (c) Once only memory (d) Read only memory 
13. What is the permanent memory built into your computer called (a) RAM (b) Floppy (c) CPU (d) ROM
14. A set of flip flops integrated together is called _______ (a) counter (b) adder (c) Register (d) None of the above
15. Main storage is also called _________ (a) Accumulator (b) Control unit (c) Register (d) Memory 
16. ________ is a collection of related fields that can be treated as a unit (a) file (b) Record (c) Data item 
17. __________ refers to a single unit of values (a) Files (b) Record (c) Field (d) Data item
18. A computer file can be best described as (a) a single data item (b) a general collection of data items (c) an orderly collection of data items (d) a random collection of data 
19. The output of an exclusive-OR gates is high if _______ (a) all input are low (b) all input are high (c) the input are unequal (d) none of the above 
20. If the output of  a two input AND gate must be a logic low, what must the condition of the input be (a) all input must be low (b) all input must be high (c) at least one input must be low (d) at least one input must be high  
21. If the output of an OR gate with three inputs, A,B,C is low when ________(a) A=0, B=0, C=0 (b) A=0, B=0, C=1 (c) A=0, B=1, C=1 (d) all of the above 
22. The output of an AND gate with three input A,B,C, is high when________ (a) A=1, B=1,C=0 (b) A=0, B=0, C=0 (c) ) A=1, B=1,C=1 (d) A=1, B=0, C=1
23. The last stage of instruction execution cycle (a) The CPU fetches the instructions (b) the ALU perform the actual operation (c) The result of the operation is stored in the memory (d) The control unit decides what the instruction means 
24. _______ unit store instructions data and result   (a) Control unit (b) ALU (c) Memory unit (d) Logic Unit 
25. The algebraic equation for AND gate with the input variable A and B is (a) x= A.B (b) X=A+B (c) X=A-B 
26. The number 2810 in binary is (a) 10012 (b)110012 (c) 1100112 (d) 111002
27. Which of the following components is directly located inside the computer (a)ALU (b) BIOS (c) RAM (d) ROM
28. The primary memory of the computer can be divided into (a) Register and ROM (b) Mass storage and ROM (c) Volatile memory and auxiliary memory (d) RAM and ROM 
29. The computer memory is measured in (a) Bit (b) Byte (c) Hertz(d) Nibble
30. X

Y Z 

In the diagram above, the value of Z when X=1 and Y=0 is (a) 0 (b) 1 (c) 10 (d) 11

                                SECTION B

        Answer any three questions in this section, question one is compulsory

1. Define logic gate 
2.  Give one example each of
3. Standard single logic gate 

1. Alternative logic gate 

1c. Using P and Q as input and R as output 

1. Draw the logic symbol for an XOR gate 
2. Construct the truth table for XOR gate 

1d. List two uses of a logic gate 

1. What is a register 

2b. List two types of register 

2c. State three functions of a register 

2d Outline three differences between a register and main memory 

1. What is computer file 

3b. State two features each of: 

1. Transaction file 
2. Master file  

3c. State effect of file security 

3d. Method of securing files 

1. List and explain three components of central processing unit 

4b. Explain the instruction execution cycle of CPU 

4c. in a tabular form, state two differences between Random Access Memory and Read Only Memory 

1. What is Memory 

5b. List the two categories of primary memory 

5c. List four differences primary memory and secondary memory