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Register Transfer and Microoperations - Objective Type Interview Questions and Answers on Computer Science

Questions
6 The immediate addressing mode of instruction provides the operand in memory location
A Pointed by the PC
B Next to that of OP code
C Pointed by PC+1
D None of these

Answer: Option [B]

In immediate addressing mode the data is part of the instruction.

7 Fetch operations are not required in
A direct addressing
B indirect addressing
C immediate addressing
D register addressing

Answer: Option [C]

Fetch operations are not required in immediate addressing. Because in immediate addressing the data is part of the instruction.

8 The addressing mode used in an instruction of the form ADD X, Y, is
A Absolute
B Immediate
C Indirect
D Index

Answer: Option [A]

Absolute or direct addressing is used

9 The register used as a working area in CPU is
A program counter
B instruction register
C instruction decoder
D accumulator

Answer: Option [D]

An accumulator is register used in computer's central processing unit in which intermediate arithmetic and logic results are stored.

10 The addressing mode used in the instruction PUSH B
A direct
B register
C register indirect
D immediate

Answer: Option [C]

In register addressing mode the operand is held in memory. The address of the operand location is held in a register which is specified in instruction.

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