CPU as the brain of the computer in Intro to Computing - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

What is the main role of the CPU in a computer?

Imagine the CPU as the brain of a computer. What does it mainly do?

A It connects the computer to the internet.

B It stores all the data permanently like a hard drive.

C It displays images and videos on the screen.

D It processes instructions and controls other parts of the computer.

💡 Hint

Think about what a brain does in a human body.

The CPU acts like the brain by processing instructions and managing other components. Storage and display are handled by other parts.

❓ trace

intermediate

Trace the CPU instruction cycle steps

Which sequence correctly shows the CPU instruction cycle steps?

A 2,1,3,4

B 1,2,3,4

C 2,3,1,4

D 3,2,1,4

💡 Hint

Think about what the CPU must do first before it can understand and act.

The CPU first fetches the instruction, then decodes it, executes it, and finally stores the result if needed.

❓ Comparison

advanced

Compare CPU and RAM roles

Which statement correctly compares the CPU and RAM?

A CPU displays output; RAM connects to the internet.

B CPU stores data permanently; RAM processes instructions.

C CPU processes instructions; RAM temporarily holds data and instructions.

D CPU and RAM both permanently store data.

💡 Hint

Think about which part acts like the brain and which part acts like a short-term memory.

The CPU processes instructions like a brain, while RAM temporarily holds data and instructions for quick access.

❓ identification

advanced

Identify the CPU component responsible for arithmetic

Which part of the CPU performs arithmetic and logical operations?

A Arithmetic Logic Unit (ALU)

B Control Unit

C Cache Memory

D Input/Output Controller

💡 Hint

Think about the part that does calculations.

The ALU performs all arithmetic and logical operations inside the CPU.

🚀 Application

expert

What happens if the CPU clock speed increases?

Imagine the CPU clock speed doubles. What is the most likely effect on the computer's performance?

A The computer will store twice as much data permanently.

B The computer will run instructions twice as fast, improving performance.

C The computer will use half the electricity it used before.

D The computer will display images with double the resolution.

💡 Hint

Think about how clock speed affects instruction processing.

Increasing clock speed means the CPU can process instructions faster, improving overall performance.