Computer Organization multiple Choice Questions – Set 05

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Q1. The circuit used to store one bit of data is known as

(A) Encoder
(B) OR gate
(C) Flip-Flop
(D) Decoder

Answer: (C) Flip-Flop

Q2. The multiplicand register & multiplier register of a hardware circuit implementing booth’s algorithm have (11101) & (1100). The result shall be

(A) (812) 10
(B) (-12) 10
(C) (12) 10
(D) (-812) 10

Answer: (A) (812) 10

Q3. Status bit is also called

(A) Binary bit
(B) Flag bit
(C) Signed bit
(D) Unsigned bit

Answer: (B) Flag bit

Q4. Which of the following are not a machine instructions?

(D) Both (b) & (c)

Answer: (D) Both (b) & (c)

Q5. A stack organized computer has

(A) Three-address Instruction
(B) Two-address Instruction
(C) One-address Instruction
(D) Zero-address Instruction

Answer: (D) Zero-address Instruction

Q6. The communication between the components in a microcomputer takes place via the address and

(A) I/O bus
(B) Data bus
(C) Address bus
(D) Control lines

Answer: (B) Data bus

Q7. PSW is saved in stack when there is a __.

(A) Interrupt recognized
(B) Execution of RST instruction
(C) Execution of CALL instruction
(D) All of these

Answer: (A) Interrupt recognized

Q8. Write Through technique is used in which memory for updating the data

(A) Virtual memory
(B) Main memory
(C) Auxiliary memory
(D) Cache memory

Answer: (D) Cache memory

Q9. _ register keeps tracks of the instructions stored in program stored in memory.

(A) AR (Address Register)
(B) XR (Index Register)
(C) PC (Program Counter)
(D) AC (Accumulator)

Answer: (C) PC (Program Counter)

Q10. An address in main memory is called

(A) Physical address
(B) Logical address
(C) Memory address
(D) Word address

Answer:(A) Physical address

Q11. In Assembly language programming, minimum number of operands required for an instruction is/are

(A) Zero
(B) One
(C) Two
(D) Both (b) & (c)

Answer:(A) Zero

Q12. A Program Counter contains a number 825 and address part of the instruction contains the number 24. The effective address in the relative address mode, when an instruction is read from the memory is

(A) 849
(B) 850
(C) 801
(D) 802

Answer: (B) 850

Q13. A register capable of shifting its binary information either to the right or the left is called a

(A) Parallel register
(B) Serial register
(C) Shift register
(D) Storage register

Answer: (C) Shift register

Q14. In computers, subtraction is carried out generally by________.

(A) 1’s complement method
(B) 2’s complement method
(C) Signed magnitude method
(D) BCD subtraction method

Answer:(B) 2’s complement method

Q15. Generally Dynamic RAM is used as main memory in a computer system as it

(A) Consumes less power
(B) Has higher speed
(C) Has lower cell density
(D) Needs refreshing circuitry

Answer: (B) Has higher speed

Computer Organization and Architecture MCQ – All Set

Computer Organization and Architecture MCQ – Set 01
Computer Organization and Architecture pdf – Set 02
Computer Organization Questions & Answers – Set 03
Computer Architecture Questions & Answers – Set 04
Computer Organization multiple Choice Questions – Set 05
Computer Architecture MCQ Free Online Practice – Set 06
Computer Organization and Architecture MCQQ Online Test Set – 07

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