8086 Microprocessor Questions

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1.

 8086 Microprocessor supports _______ modes of operation.

A

2

B

3

C

4

D

5

Correct Answer: A

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2.

Which of the following is not a Features of 8086?

A

It uses two stages of pipelining

B

It is available in 3 versions based on the frequency of operation

C

Fetch stage can prefetch up to 6 bytes of instructions

D

It has 512 vectored interrupts.

Correct Answer: D

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3.

8086 can access up to?

A

512KB

B

1Mb

C

2Mb

D

256KB

Correct Answer: B

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4.

 8086 has ___ address bus.

A

16-bit

B

18-bit

C

20-bit

D

24-bit

Correct Answer: C

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5.

Which flag is set to 1 when the result of arithmetic or logical operation is zero else it is set to 0?

A

Binary bit

B

Zero flag

C

Sign flag

D

Overflow flag

Correct Answer: B

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6.

 Which flag represents the result when the system capacity is exceeded?

A

Carry flag

B

Auxiliary flag

C

Trap flag

D

Overflow flag

Correct Answer: D

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7.

It is an edge triggered input, which causes an interrupt request to the microprocessor.

A

NMA

B

INTR

C

INTA

D

ALE

Correct Answer: A

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8.

 It is used to write the data into the memory or the output device depending on the status of M/IO signal.

A

IR

B

HLDA

C

HR

D

WR

Correct Answer: D

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9.

 Which intruction is Used to load the address of operand into the provided register?

A

LEA

B

LDS

C

LES

D

LAHF

Correct Answer: A

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10.

 The different ways in which a source operand is denoted in an instruction is known as

A

Instruction Set

B

Interrupts

C

8086 Configuration

D

Addressing Modes

Correct Answer: D

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