3.4.4 AQA Computer Components

Where do calculations and comparison operations take place in a CPU?

• Clock

• Arithmetic Logic Unit

• Registers

• Control Unit

What is the purpose of the Clock in a CPU?

• To store frequently accessed data

• To decode machine code

• To keep components synchronised

• To control data transfer

What is the role of a Bus in a computer?

• To store frequently accessed data

• To transfer data between components

• To keep components synchronised

• To control and monitor data transfer

What are memory locations in the CPU used to carry out the Fetch Decode Execute Cycle called?

• Clock

• Arithmetic Logic Unit

• Control Unit

• Registers

What is the purpose of the Control Unit in a CPU?

• To keep components synchronised

• To manage and monitor data transfer

• To store frequently accessed data

• To transfer data between components

Every operation takes place in the (a)   . This is where calculations (e.g., adding two binary numbers) and logic operations (e.g., checking to see if one number is bigger than another) take place.

The (a)   manges and monitors data transfer between different input and output hardware components and decodes the machine code.

The purpose of the (a)   is to keep all the CPU components synchronised. The speed of transfer of data is limited when travelling between components even if this is only nanoseconds, but all the components do need to be synchronised.

A (a)   is wires through which data and instructions are transferred between computer components

A (a)   is a memory location in the CPU.  It is used to store currently processed data and instructions. Much faster than cache and RAM however also much smaller.