WorksheetsIntel 8086 Microprocessor Quiz
Total questions: 25
Worksheet time: 19mins
Which of the following is a multipurpose register in the 8086?
CS
DS
AX
IP
The AX register in 8086 can be divided into or it is equivalent to 8-bit register:
AH and AL
AXH and AXL
A1 and A2
ACC and TMP
Which register is commonly used as an accumulator?
BX
CX
DX
AX
Which multipurpose register is often used as a base register?
AX
BX
CX
DX
Which register is typically used as a counter?
AX
BX
CX
DX
Which register pair is used for extended arithmetic operations?
AX and BX
BX and CX
CX and DX
AX and DX
How many multipurpose registers are present in 8086?
4
6
8
16
Which of the following is not a multipurpose register?
AX
BX
CX
CS
How many segment registers are available in 8086?
2
4
6
8
Which segment register points to the code segment?
DS
ES
SS
CS
Which segment register is associated with stack operations?
CS
DS
SS
ES
The Data Segment register is abbreviated as:
CS
DS
SS
ES
Which segment register is mainly used for extra data storage?
CS
DS
SS
ES
In real mode, the physical address is calculated using:
Segment + Offset
Segment × 16 + Offset
Segment × 256 + Offset
Offset × 16 + Segment
What is the maximum physical memory addressable in real mode?
64 KB
256 KB
1 MB
16 MB
Real mode addressing uses how many bits for physical addressing?
16
20
24
32
Which register provides the offset part in real mode addressing?
Segment register
Multipurpose register
Offset register
Instruction pointer or effective address
Protected mode allows access to memory up to:
1 MB
16 MB
64 MB
4 GB
Which mode provides memory protection and segmentation?
Real mode
Protected mode
Virtual mode
Debug mode
In protected mode, segments are defined using:
Physical addresses
Segment descriptors
Offset registers
Stack pointers
Which mode does not provide memory protection?
Protected mode
Virtual mode
Real mode
Supervisor mode
Segment registers in protected mode contain:
Physical address
Offset address
Selector values
Page numbers
Which mode uses a simple segmentation scheme?
Protected mode
Virtual mode
Real mode
Paging mode
The purpose of protected mode is to:
Increase clock speed
Improve instruction execution
Provide memory protection and multitasking
Reduce hardware cost
Which register remains essential in both real and protected modes?
Segment registers
Flag register
Instruction decoder
Cache memory
