OCR J277 - 1.1 - CPU and Embedded Systems - Knowledge Check

Front

What is a main purpose of the CPU?

Back

To carry out the fetch-execute cycle

Front

What does the ALU (Arithmetic Logic Unit) in a CPU do?

Back

Performs arithmetic and logical operations

Front

Which component of the CPU is responsible for controlling the execution of instructions?

Back

CU (Control Unit)

Front

What is the main function of the cache in a CPU?

Back

To store frequently used data for quick access

Front

Which register in the Von Neumann architecture holds the address of the next instruction to be executed?

Back

Program Counter

Front

What does the MAR (Memory Address Register) store?

Back

The address of data to be accessed

Front

Which of the following is NOT a component of the Von Neumann architecture?

• Graphics Card
• MAR (Memory Address Register)
• MDR (Memory Data Register)
• Accumulator

Back

Graphics Card

Front

What is the main purpose of the MDR (Memory Data Register)?

Back

To store data being transferred to or from memory

Front

What does the fetch-execute cycle describe?

Back

The process by which the CPU retrieves and executes instructions

Front

What is the difference between storing data and storing an address in a register?

Back

Data is the actual value, while an address points to a location in memory