1. Brain of computer is ____________.
A. Control unit
B. Arithmetic and Logic unit
C. Central Processing Unit
D. Memory
Answer = Central Processing Unit
2. Control Unit acts as the central nervous system of the computer.
A. True
B. False
C. Nothing Can be said
D. None of the mentioned
Answer = True
3. What does MBR stand for.
A. Main Buffer Register
B. Memory Buffer Routine
C. Main Buffer Routine
D. Memory Buffer Register
Answer = Memory Buffer Register
4. In the instruction ADD A, B, the answer gets stored in ___________.
A. B.
B. A.
C. Buffer
D. C.
Answer = A
5. What does PC stand for.
A. Program Changer
B. Program Counter
C. Performance Counter
D. Performance Changer
Answer = Program Counter
6. Which of the following holds the last instruction fetched.
A. PC.
B. MAR.
C. MBR.
D. IR.
Answer = IR
7. The portion of the processor which contains the hardware required to fetch the operations is _______.
A. Datapath
B. Processor
C. Control
D. Output unit
Answer = Datapath
8. Causing the CPU to step through a series of micro operations is called _________.
A. Execution
B. Runtime
C. Sequencing
D. Pipelining
Answer = Sequencing
9. The functions of execution and sequencing are performed by using ______________.
A. Input Signals
B. Output Signals
C. Control Signals
D. CPU.
Answer = Control Signals
10. What does D in the D-flip flop stand for.
A. Digital
B. Direct
C. Delay
D. Durable
Answer = Delay
11. CPU has built-in ability to execute a particular set of machine instructions, called as __________.
A. Instruction Set
B. Registers
C. Sequence Set
D. User instructions
Answer = Instruction Set
12. Opcode indicates the operations to be performed.
A. True
B. False
C. Nothing Can be said
D. None of the mentioned
Answer = True
13. The length of a register is called _______.
A. word limit
B. word size
C. register limit
D. register size
Answer = word size
14. The _________ holds the contents of the accessed memory word.
A. MAR.
B. MBR.
C. PC.
D. IR.
Answer = MBR
15. Which of the following is not a visible register.
A. General Purpose Registers
B. Address Register
C. Status Register
D. MAR.
Answer = MAR
16. Which of the following is a data transfer instruction.
A. STA 16-bit address
B. ADD A, B.
C. MUL C, D.
D. RET.
Answer = STA 16-bit address
17. What is correct instruction if you want the control to go to the location 2000h.
A. MOV 2000h
B. MOV A, 2000h
C. JMP 2000h
D. RET 2000h
Answer = JMP 2000h
18. What kind of a flag is the sign flag.
A. General Purpose
B. Status
C. Address
D. Instruction
Answer = Status
19. The number of sign bits in a 32-bit IEEE format __________.
A. 1.
B. 11.
C. 9.
D. 23.
Answer = 1
20. New CPU whose instruction set includes the instruction set of its predecessor CPU is said to be ___________ with its predecessor.
A. fully compatible
B. forward compatible
C. compatible
D. backward compatible
Answer = backward compatible