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Intel 8086 Microprocessor Quiz

Total questions: 25

Worksheet time: 19mins

Name
Class
Date
1.

Which of the following is a multipurpose register in the 8086?

a)

CS

b)

DS

c)

AX

d)

IP

2.

The AX register in 8086 can be divided into or it is equivalent to 8-bit register:

a)

AH and AL

b)

AXH and AXL

c)

A1 and A2

d)

ACC and TMP

3.

Which register is commonly used as an accumulator?

a)

BX

b)

CX

c)

DX

d)

AX

4.

Which multipurpose register is often used as a base register?

a)

AX

b)

BX

c)

CX

d)

DX

5.

Which register is typically used as a counter?

a)

AX

b)

BX

c)

CX

d)

DX

6.

Which register pair is used for extended arithmetic operations?

a)

AX and BX

b)

BX and CX

c)

CX and DX

d)

AX and DX

7.

How many multipurpose registers are present in 8086?

a)

4

b)

6

c)

8

d)

16

8.

Which of the following is not a multipurpose register?

a)

AX

b)

BX

c)

CX

d)

CS

9.

How many segment registers are available in 8086?

a)

2

b)

4

c)

6

d)

8

10.

Which segment register points to the code segment?

a)

DS

b)

ES

c)

SS

d)

CS

11.

Which segment register is associated with stack operations?

a)

CS

b)

DS

c)

SS

d)

ES

12.

The Data Segment register is abbreviated as:

a)

CS

b)

DS

c)

SS

d)

ES

13.

Which segment register is mainly used for extra data storage?

a)

CS

b)

DS

c)

SS

d)

ES

14.

In real mode, the physical address is calculated using:

a)

Segment + Offset

b)

Segment × 16 + Offset

c)

Segment × 256 + Offset

d)

Offset × 16 + Segment

15.

What is the maximum physical memory addressable in real mode?

a)

64 KB

b)

256 KB

c)

1 MB

d)

16 MB

16.

Real mode addressing uses how many bits for physical addressing?

a)

16

b)

20

c)

24

d)

32

17.

Which register provides the offset part in real mode addressing?

a)

Segment register

b)

Multipurpose register

c)

Offset register

d)

Instruction pointer or effective address

18.

Protected mode allows access to memory up to:

a)

1 MB

b)

16 MB

c)

64 MB

d)

4 GB

19.

Which mode provides memory protection and segmentation?

a)

Real mode

b)

Protected mode

c)

Virtual mode

d)

Debug mode

20.

In protected mode, segments are defined using:

a)

Physical addresses

b)

Segment descriptors

c)

Offset registers

d)

Stack pointers

21.

Which mode does not provide memory protection?

a)

Protected mode

b)

Virtual mode

c)

Real mode

d)

Supervisor mode

22.

Segment registers in protected mode contain:

a)

Physical address

b)

Offset address

c)

Selector values

d)

Page numbers

23.

Which mode uses a simple segmentation scheme?

a)

Protected mode

b)

Virtual mode

c)

Real mode

d)

Paging mode

24.

The purpose of protected mode is to:

a)

Increase clock speed

b)

Improve instruction execution

c)

Provide memory protection and multitasking

d)

Reduce hardware cost

25.

Which register remains essential in both real and protected modes?

a)

Segment registers

b)

Flag register

c)

Instruction decoder

d)

Cache memory