Lesson 2 CPU

Question 1

What are the four stages of the Fetch - decode - execute - cycle?

Answer 1

• Fetch
• Decode
• Execute
• Cycle

These stages represent the fundamental operations of a CPU in processing instructions.

Question 2

What does the Fetch stage do in the CPU cycle?

Answer 2

Fetches the instructions

This is the first step where the CPU retrieves the instruction from memory.

Question 3

What is the purpose of the Decode stage in the CPU cycle?

Answer 3

Decodes what to do

In this stage, the CPU interprets the fetched instruction to understand the required action.

Question 4

What happens during the Execute stage of the CPU cycle?

Answer 4

Do it

The CPU performs the operation specified by the decoded instruction.

Question 5

What does the Cycle stage signify in the CPU operation?

Answer 5

Repeat

This indicates that the CPU continuously repeats the fetch-decode-execute cycle for processing instructions.

Question 6

What is the frequency of 1 Hertz (Hz) in terms of CPU cycles?

Answer 6

1 cycle per second

This is the basic unit of frequency measurement for CPU speed.

Question 7

How many cycles per second does 1 Kilohertz (kHz) represent?

Answer 7

1,000 cycles per second

Kilohertz is commonly used to describe the speed of processors in the past.

Question 8

What is the equivalent of 1 Megahertz (MHz) in cycles per second?

Answer 8

1,000,000 cycles per second

This unit is often used to measure the speed of older processors.

Question 9

How many cycles per second does 1 Gigahertz (GHz) equal?

Answer 9

1,000,000,000 cycles per second

Gigahertz is a standard unit for measuring the speed of modern processors.