CPU Components

What is the main function of the CPU?

• To carry out processing of the data.
• To help with playing games.
• To fetch instructions from memory, decode them and execute the instructions.
• To heat up the computer.

What is the job of the control unit?

• It carries out calculations
• It stores information.
• It does nothing.
• It controls the input and output of data to make sure that it gets to the right place.

What does CPU stand for?

• Control Processing Unit
• Central Processing Unit
• Central Power Unit
• Center Power Unit

Which of the following is an example of 'main memory'.

• Hard Drive
• USB Drive
• RAM
• ROM

What is a bus?

• A circuit that connect one part of CPU to other components.
• A type of long term memory
• A type of permanent memory
• A method of transport

What is cache memory?

• A very large, temporary memory
• A very small but expensive memory
• It is used to store data and programs permanently
• It is a type of payment

How can a bigger cache improve CPU performance?

• By being able to carry out more calculations
• By being able to store more recently used instruction inside the CPU for quicker access times
• By being able to 

Performs calculations (i.e. addition, division, multiplication, subtraction)

• MAR (Memory Address Register)

• MDR (Memory Data Register)

• CIR (Current Instruction Register)

• PC (Program Counter)

• ALU (Arithmetic and Logic Unit)

Holds the data that is being transferred to or from memory.

• MAR (Memory Address Register)

• MDR (Memory Data Register)

• CIR (Current Instruction Register)

• PC (Program Counter)

• ALU (Arithmetic and Logic Unit)

Which of these ARE NOT parts of the CPU? (select as many as appropriate)

• Accumulator

• General Purpose Register

• Input Device

• PC (Program Counter)

• Output Device