Computer Organization & Architecture (3140707) MCQs

MCQs of Basic Computer Organization and Design

Showing 21 to 30 out of 50 Questions
1 2 3 4 5
21.
Which part of instruction cycle is not executed in direct addressing mode?
(a) Fetch
(b) Read effective address
(c) Decode
(d) Above all
Answer:

Option (b)

22.
In T0 timing cycle, value of PC is transferred to which register?
(a) IR
(b) AC
(c) AR
(d) DR
Answer:

Option (c)

23.
After reading instruction from memory, it is placed in which register?
(a) DR
(b) AR
(c) AC
(d) IR
Answer:

Option (d)

24.
Which register is incremented by 1 to prepare for the address of next instruction in the program?
(a) IR
(b) PC
(c) AR
(d) AC
Answer:

Option (b)

25.
Which of the following is symbol of execute a register-reference instruction?
(a) D7' I T3
(b) D7' I' T3
(c) D7 I' T3
(d) D7 I T3
Answer:

Option (c)

26.
D7 I T3 is symbol of?
(a) Direct in MRI
(b) Indirect in MRI
(c) Register-reference
(d) I/O-reference
Answer:

Option (d)

27.
What is full-form of MRI?
(a) Memory Reference Instruction
(b) Memory Read Instruction
(c) Mask Reset Interrupt
(d) Mask Read Interrupt
Answer:

Option (a)

28.
Boolean relation D7 I' T3 is designated by which symbol?
(a) p
(b) q
(c) r
(d) s
Answer:

Option (c)

29.
Which instruction clears a start-stop flip-flop S?
(a) SZE
(b) HLT
(c) END
(d) CLS
Answer:

Option (b)

30.
Which bit is transferred into "E" after execution of CIR instruction?
(a) AC (7)
(b) AC (15)
(c) AR (15)
(d) AC (0)
Answer:

Option (d)

Showing 21 to 30 out of 50 Questions
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