CPU Components and Functions (GCSE AQA)

John is building a computer. What is the purpose of the arithmetic logic unit in his computer?

• To provide fast access to frequently used instructions and data

• To carry out calculations and make logical decisions

• To synchronize related components by generating pulses

• To transmit data and instructions from one component to another

Which component of the CPU is responsible for sending signals to control data movement and coordinate CPU operations?

• Arithmetic Logic Unit

• Control Unit

• Cache

• Clock

Imagine you're a computer engineer working on a CPU. What would be the purpose of the cache in this CPU?

• To provide fast access to frequently used instructions and data

• To carry out calculations and make logical decisions

• To synchronize related components by generating pulses

• To transmit data and instructions from one component to another

Imagine you're a computer engineer working on a CPU. What would be the function of the clock in this scenario?

• To provide fast access to frequently used instructions and data, like a librarian quickly retrieving popular books

• To carry out calculations and make logical decisions, like a mathematician solving complex problems

• To synchronize related components by generating pulses, like a conductor leading an orchestra

• To transmit data and instructions from one component to another, like a courier delivering packages

What are registers in the CPU?

• Tiny super fast pieces of onboard memory inside the CPU

• Collections of wires to transmit data and instructions

• Components responsible for carrying out calculations and logical decisions

• Electronic units that synchronize related components

What is the purpose of the program counter register?

• To hold the address of the next instruction to be executed

• To hold the address in memory which data or instruction needs to be read from or written to

• To hold the data or instruction fetched from memory or about to be written back to memory

• To store temporary values before being written to and from memory

Imagine you are a computer. What would you use the memory address register for?

• Remembering the address of the next task you need to perform

• Keeping track of the location in your memory where you need to read from or write to

• Storing the task or information you just retrieved from your memory or are about to store back into your memory

• Storing temporary values before they are written to and from your memory

Imagine you are a computer. What would you store in your memory data register?

• The address of the next task you need to perform

• The location in your memory where you need to retrieve or store information

• The information or task you just retrieved from your memory or about to store back into your memory

• Temporary values before they are stored or retrieved from your memory

Imagine you're working on a computer. What would be the role of the accumulator in the CPU in this scenario?

• To provide fast access to frequently used applications and files

• To perform calculations and make logical decisions for the computer

• To store temporary values before they are written to and from the computer's memory

• To synchronize related components of the computer by generating pulses

Imagine you are a computer engineer. What would be the purpose of buses in the CPU of the computer you are working on?

• To provide fast access to frequently used instructions and data, like a librarian quickly retrieving a popular book

• To carry out calculations and make logical decisions, like a calculator

• To synchronize related components by generating pulses, like a conductor leading an orchestra

• To transmit data and instructions from one component to another, like a mailman delivering letters