8086 Microprocessor MCQs

M

Mr. Dubey • 51.43K Points
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Q 21. During a read operation the CPU fetches ________.

(A) a program instruction
(B) another address
(C) data itself
(D) all of the above
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Mr. Dubey • 51.43K Points
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Q 22. Which of the following is not an arithmetic instruction?

(A) inc (increment)
(B) cmp (compare)
(C) dec (decrement)
(D) rol (rotate left)
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Mr. Dubey • 51.43K Points
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Q 23. A 20-bit address bus can locate ________.

(A) 1,048,576 locations
(B) 2,097,152 locations
(C) 4,194,304 locations
(D) 8,388,608 locations
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Mr. Dubey • 51.43K Points
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Q 24. Which is not an operand?

(A) variable
(B) register
(C) memory location
(D) assembler
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Mr. Dubey • 51.43K Points
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Q 25. Which microprocessor has multiplexed data and address lines?

(A) 8086
(B) 80286
(C) 80386
(D) pentium
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Mr. Dubey • 51.43K Points
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Q 26. The first microprocessor had a(n)________.

(A) 1 – bit data bus
(B) 2 – bit data bus
(C) 4 – bit data bus
(D) 8 – bit data bus
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Mr. Dubey • 51.43K Points
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Q 27. Which method bypasses the CPU for certain types of data transfer?

(A) software interrupts
(B) interrupt-driven i/o
(C) polled i/o
(D) direct memory access (dma)
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Mr. Dubey • 51.43K Points
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Q 28. Which of the following is not a basic element within the microprocessor?

(A) microcontroller
(B) arithmetic logic unit (alu)
(C) register array
(D) control unit
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Mr. Dubey • 51.43K Points
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Q 29. Status register is also called as ___________.

(A) accumulator
(B) stack
(C) counter
(D) flags
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Mr. Dubey • 51.43K Points
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Q 30. The First Microprocessor was__________.

(A) intel 4004
(B) 8080
(C) 8085
(D) 4008
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