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Q.

The first byte of an absolute jump instruction consists of

A

3 LSBs of opcode and 5 MSBs of 11-bit address

B

5 MSBs of opcode and 3 LSBs of 11-bit address

C

6 MSBs of opcode and 1 LSB of 11-bit address

D

5 LSBs of opcode and 3 MSBs of 11-bit address

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MCQ

1.

The conditional control transfer instructions use

A

status flags

B

bits of bit addressable RAM

C

SFRs termed bit

D

all of the mentioned

Discussion

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2.

The control transfer instructions are divided into

A

explicit and implicit control transfer instructions

B

conditional and unconditional control transfer instructions

C

auto control and self control transfer instructions

D

all of the mentioned

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3.

The absolute jump instruction is intended mainly for a jump within a memory space of

A

2 bytes

B

2 Kbytes

C

2 Mbytes

D

none

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4.

Which of the following is not an unconditional control transfer instruction?

A

JMP

B

RET

C

JNC

D

CALL

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5.

The type of operand that is not allowed to use in boolean instructions of 8051 is

A

direct register operands

B

indirect register operands

C

immediate bit

D

none

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