fetch-decode-execute cycle

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1. what is the use of the ALU

  • controls the data bus to regulate its network
  • decodes data before executed
  • where arithmetic and logic problems are performed
  • commands the entire CPU
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2. what does MAR stand for?

  • minor address register
  • memory address register
  • main Arithmetic register
  • major address register

3. what is the use of the mbr?

  • buffers data coming from external networks
  • where data is decoded before execution
  • to temporarily store data whilst it's waiting to be processed
  • buffers data depending on internet speed

4. what does the program counter store?

  • the next instruction
  • the address of the next instruction
  • the current instruction in the processor
  • the number of instructions completed

5. In the fetch part of FDE cycle what bus does it use to collect data from the memory?

  • instruction bus
  • address bus
  • data bus
  • control bus


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