IT Computer Architecture

Question 1

What is the primary function of the Arithmetic Logic Unit (ALU) in a CPU?

Accepted Answer

Perform arithmetic and logical operations

Answer

The ALU executes arithmetic operations (addition, subtraction) and logical operations (AND, OR, NOT) on binary data.

Question 2

Which type of memory loses its contents when power is removed?

Accepted Answer

RAM

Answer

RAM (Random Access Memory) is volatile memory, meaning all stored data is lost when the power supply is interrupted.

Question 3

During the fetch-decode-execute cycle, what happens in the 'decode' phase?

Accepted Answer

The control unit interprets the instruction's opcode

Answer

During decode, the control unit interprets the fetched instruction's opcode to determine which operation must be performed.

Question 4

What is the primary purpose of cache memory in a computer system?

Accepted Answer

To reduce the speed gap between the CPU and main memory

Answer

Cache stores frequently accessed data close to the CPU, minimizing the wait time caused by the slower access speed of main memory.

Question 5

Which bus in a computer system carries the memory location being accessed by the CPU?

Accepted Answer

Address bus

Answer

The address bus transmits the memory address the CPU wants to read from or write to, specifying the exact location in memory.

IT - Bachelor's Degree in Information Technology Practice Test