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This page provide you Computer Organization and Architecture Multiple Choice Question With Answer Which is very useful for many exam of computer science students like Semester, DRDO, ISROM, Banking, Railway etc.
COA MCQs SET-1
Q.1 What is the bit size of the Intel 8080 microprocessor?
8
16
2
None
Explanation
The Intel 8080 is an 8-bit microprocessor that was a successor to the 8008.
Q.2 What is the bit size of the Intel 80386 microprocessor?
8
16
32
None
Explanation
The 80386 (or i386) was the first 32-bit processor in the x86 family.
Q.3 What is the bit size of the Intel 8086 microprocessor?
8
16
32
None
Explanation
The Intel 8086 is a 16-bit microprocessor chip that gave rise to the x86 architecture.
Q.4 What is the base (radix) of the Hexadecimal number system?
8
16
32
None
Explanation
Hexadecimal is a positional numeral system with a radix, or base, of 16.
Q.5 What is the typical size of the Instruction Register (IR) in a 16-bit architecture?
8
16
32
None
Explanation
In 16-bit architectures like the 8086, the instruction register typically holds 16-bit instructions.
Q.6 Which software translates programs written in assembly language into machine language?
Compiler
Assembler
Converter
None
Explanation
An Assembler is a program that converts low-level assembly language code into executable machine code.
Q.7 Which logic gate produces the complement (inverse) of its input?
OR GATE
AND GATE
NOT GATE
None
Explanation
The NOT gate is a basic logic gate that performs logical negation; it outputs the opposite of the input bit.
Q.8 What is the size of the Instruction Register (IR) in an 8086 system?
32 bit
16 bit
8 bit
None
Explanation
The Instruction Register in the 8086 microprocessor is 16 bits wide.
Q.9 What is the standard size of the Data Register (DR) in a 16-bit processor?
32 bit
16 bit
8 bit
None
Explanation
In a 16-bit computer architecture, the Data Register is typically 16 bits wide to match the word size.
Q.10 What is the full form of the acronym MAR?
Memory address register
Memory address ram
Memory address rom
None
Explanation
MAR stands for Memory Address Register, which holds the memory location of data that needs to be accessed.
Q.11 In computer architecture, Cache memory is physically located between?
Disk and CPU
Disk and main memory
Main memory and CPU
None
Explanation
Cache memory is a high-speed buffer positioned between the CPU and main memory (RAM) to speed up data access.
Q.12 What is the physical nature of cache memory?
Volatile
Non-volatile
Both
None
Explanation
Cache memory is volatile, meaning it loses its stored information immediately when power is removed.
Q.13 A light pen is classified as which type of device?
Input device
Output device
Both
None
Explanation
A light pen is a computer input device in the form of a light-sensitive wand used to select or draw on the screen.
Q.14 What is the full form of the connection standard USB?
Universal serial both
Universal serial bus
Both
None
Explanation
USB stands for Universal Serial Bus, an industry standard for cables and connectors between computers and peripherals.
Q.15 How many primary registers does a basic DMA controller typically contain?
4
3
2
None
Explanation
A standard DMA controller has three main registers: Address register, Word count register, and Control register.
Q.16 A group of bits that tells the computer to perform a specific operation is known as a(n)?
Register
Accumulator
Micro operation
Instruction code
Explanation
An instruction code is a group of bits that instructs the computer to perform a specific operation.
Q.17 The actual address used to access a location in main memory is called a?
Physical address
Logical address
Memory address
None
Explanation
A physical address is a memory address that is represented in the form of a binary number on the circuit.
Q.18 A memory unit that is accessed by its content rather than its address is called?
RAM
Virtual memory
Associative memory
None
Explanation
Associative memory, also known as Content Addressable Memory (CAM), searches for data by its value.
Q.19 In digital computers, binary subtraction is generally carried out using which method?
1's complement
2's complement
0's complement
None
Explanation
Most modern computers perform subtraction by adding the 2’s complement of the number to be subtracted.
Q.20 Which basic electronic circuit is used to store exactly one bit of digital data?
Encoder
Decoder
Flip flop
None
Explanation
A flip-flop is a bistable multivibrator used as a basic memory element to store a single bit (0 or 1).