Test: Introduction To Microprocessor 8086


10 Questions MCQ Test Topicwise Question Bank for Electronics Engineering | Test: Introduction To Microprocessor 8086


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Attempt Test: Introduction To Microprocessor 8086 | 10 questions in 30 minutes | Mock test for Electronics and Communication Engineering (ECE) preparation | Free important questions MCQ to study Topicwise Question Bank for Electronics Engineering for Electronics and Communication Engineering (ECE) Exam | Download free PDF with solutions
QUESTION: 1

 Consider the following statements:
1. A total of about one million bytes can be directly addressed by the 8086 microprocessors,
2. 8086 has thirteen 16 bit- registers.
3. 8086 has eight flags.
4. Compared to 8086, the 80286 provides a higher degree of memory protection.

Which of the statements given above are correct?

Solution:

8086 microprocessor has total 9 flags namely- OF, DF, IF, TF, S, Z, AC, P and C. Hence, statement-3 is not correct.

QUESTION: 2

 Direction flag is used with

Solution:

Direction flag is used only with string instructions.

QUESTION: 3

Which of the following pairs of 8086 microprocessor's interrupt is not correctly matched?

Solution:
QUESTION: 4

What will be the contents of register AL after the following program has been executed in a 8086 microprocessor?
MOV AL, 7E 
MOV BL, 8C 
ADD AL, BL

Solution:

QUESTION: 5

Match List-I (2 pins of 8086) with List-il (Status) and select the correct answer using the codes given below the list

List-I I
What is read/written?
1. 1 -byte from/to odd address
2. 1-byte from/to even address
3. One 16-bitword
4. NOP

Solution:
QUESTION: 6

Number of times the instruction sequence below will loop before coming out of loop is

Solution:
QUESTION: 7

Match List-I (8085 Register) with List-ll (8086 Register) and select the correct answer using the codes given below the lists:

Solution:
QUESTION: 8

 Match List-I (Addressing modes of 8086) with List-ll (8086 Instructions) and select the correct answer using the codes given below the lists:

List-I
A. Register indirect addressing mode
B. Indexed addressing mode
C. Direct addressing mode
D. Based addressing mode

Solution:
QUESTION: 9

When an 8086 microprocessor executes an INT type instruction, it

Solution:
QUESTION: 10

Consider the following instructions executed in 8086;
PUSH AX ; AX has 20 Hex in it
PUSH BX ; BX has 34 Hex in it
POP AX 
ADD AX, BX 
POP G

The value stored in-G would be

Solution:
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