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level: Computer Architecture

Questions and Answers List

level questions: Computer Architecture

QuestionAnswer
What are 3 types of busesaddress bus, data bus and control bus
What does address bus dotransmit signals relating to address between processor and memory
What does data bus do?Transmit data between processor and memory unit and I/O device
What does a control bus do?transmit signals relating to control all activities in the computer
What are Memory Unit made up ofpartitions, each partition has an address and content (data)
What does a processor contain?ALU arithmetic and logic unit which is used for math operation and logic
ALU uses what register?Accumulator (ACC.) which stores result of calculation
How does a control unit work?it controls the operation of CPU. It reads instruction from memory and the instruction is interpreted and signals are transfer via control bus to tell other components what to do.
What is the definition of registera small amount of high-speed memory containing within CPU
What does a PC stand forProgram Counter
What does a PC do?stores current step number in program being executed, points to step of instruction currently being executed
What does CIR stand forCurrent instruction register
What does a CIR dopart of CPU that deletes instruction currently decoded
What does MAR stand forMemory Address Register
What does a MAR dostores memory address from which data is being fetched to CPU
What does MDR stand forMemory Data Register
What does a MDR do?contains data to be stored in computer storage (RAM)
What does a ACC do?holds current piece of data, operation performed which results are stored