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Q.

The mnemonic used to perform a subtraction of source with an 8-bit data and jumps to specified relative address if subtraction is non-zero is

A

DJNZ

B

CJNE

C

JZ

D

JNC

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MCQ

1.

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

Discussion

MCQ

2.

If the most significant bit of relative address byte is 1, then the short jump instruction is

A

forward jump

B

back jump

C

either forward or back jump

D

none

Discussion

MCQ

3.

The instruction that is used to complement or invert the bit of a bit addressable SFR is

A

CLR C

B

CPL C

C

CPL Bit

D

ANL Bit

Discussion

MCQ

4.

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

A

JMP

B

RET

C

JNC

D

CALL

Discussion

MCQ

5.

In boolean instructions, the flag that is the only allowed destination operand for two operand instructions is

A

overflow flag

B

underflow flag

C

auxiliary flag

D

carry flag

Discussion

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