The purpose of a cpu

• What is a computer defined as?

  An electronic device that takes input, processes data, and delivers output.
• What is the primary purpose of the CPU?

  To fetch, decode, and execute instructions.
• What are the three main functions of the CPU?

  • Fetch: Retrieve the next instruction from main memory (RAM).
  • Decode: Inspect the instruction to determine the required action.
  • Execute: Carry out the instruction.
• What does the CPU do during the fetch stage?

  It fetches the next instruction from main memory (RAM).
• What happens after the CPU fetches an instruction?

  It brings the instruction back into the CPU.
• What is the purpose of the decode stage in the CPU?


  To inspect the instruction and determine what needs to be done.
• What does the execute stage of the CPU do?

  It carries out the instruction.
• What are some actions that the CPU can perform during the execution of an instruction?

  • Going back to main memory to grab some data.
  • Performing a calculation.
  • Storing information back into main memory.