The FDE cycle

In this lesson, we will extend our knowledge of the components that make up the CPU by introducing the fetch-decode-execute cycle (FDE). We will observe a program running and will connect the parts of the CPU to their role in executing instructions.

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Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Von Neumann architecture requires which parts of a computer program to be stored in memory?

1/4

Q2.Which part of the CPU controls the components and manages the instructions to be executed?

2/4

Q3.Which component carries data around the CPU?

3/4

Q4.What are the small memory locations located within the CPU called?

4/4

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Von Neumann architecture requires which parts of a computer program to be stored in memory?

1/4

Q2.Which part of the CPU controls the components and manages the instructions to be executed?

2/4

Q3.Which component carries data around the CPU?

3/4

Q4.What are the small memory locations located within the CPU called?

4/4

Video

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Worksheet

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

The FDE cycle

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.During the fetch stage of the FDE cycle, where are the instructions fetched from?

1/5

Q2.What does a processor need to do to a binary instruction after it is fetched?

2/5

Q3.During the execute stage, which CPU component tells the other components what to do?

3/5

Q4.At which stage are results stored in the Accumulator?

4/5

Q5.What does the program counter do during the fetch stage?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

The FDE cycle

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.During the fetch stage of the FDE cycle, where are the instructions fetched from?

1/5

Q2.What does a processor need to do to a binary instruction after it is fetched?

2/5

Q3.During the execute stage, which CPU component tells the other components what to do?

3/5

Q4.At which stage are results stored in the Accumulator?

4/5

Q5.What does the program counter do during the fetch stage?

5/5

Lesson summary: The FDE cycle

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Computer Systems
is:
Main memory

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