Microprocessor 8086 MCQ Questions

This section focuses on "8086 Microprocessor". These Multiple Choice Questions (MCQ) should be practiced to improve the Microprocessor skills required for various interviews (campus interview, walk-in interview, company interview), placements, entrance exams and other competitive examinations.

1. 8086 Microprocessor supports _______ modes of operation.

A. 2
B. 3
C. 4
D. 5

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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.

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3. 8086 can access up to?

A. 512KB
B. 1Mb
C. 2Mb
D. 256KB

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4. 8086 has ___ address bus.

A. 16-bit
B. 18-bit
C. 20-bit
D. 24-bit

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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

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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

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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

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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

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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

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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

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