1.1a Purpose of the CPU

What is the purpose of a computer?

• To take input and deliver output

• To process data and deliver output

• To fetch, decode, and execute instructions

• To store the program and carry out instructions

What are the key components of a computer system?

• Memory and processor

• Mouse and Monitor

• Program and instructions

• Controller and monitor

What is the fetch-execute cycle?

• The process of fetching data and executing it

• The continuous cycle of fetching, decoding, and executing instructions

• The process of fetching instructions and decoding them

• The cycle of fetching, decoding, and executing data

What does the CPU do during the fetch cycle?

• Fetches the next instruction from main memory

• Decodes the instruction and breaks it down

• Executes the instruction and carries out actions

• Brings the instruction back to the CPU

What does the CPU do during the decode stage?

• Fetches the instruction from main memory

• Inspects the instruction and works out what needs to be done

• Carries out the instruction

• Brings the instruction back to the CPU

What does the CPU do during the execute stage?

• Fetches the instruction from main memory

• Inspects the instruction and works out what needs to be done

• Carries out the instruction

• Brings the instruction back to the CPU

What is the clock speed of a processor?

• The number of instructions executed per minute

• The number of cycles per second

• The speed at which the computer can add up

• The speed at which instructions are fetched

What is measured in hertz?

• Clock speed

• Memory capacity

• Data processing speed

• Instruction execution time

How many times does the fetch-execute cycle occur per second on a modern CPU?

• Millions

• Billions

• Thousands

• Trillions

What is the purpose of the memory in a computer?

• To store the programs and data currently in use

• To carry out instructions

• To fetch data

• To deliver output