Computer Architecture Quiz

What is the first step of the fetch-decode-execute cycle?

• Decode the instruction

• Execute the instruction

• Fetch the instruction from memory

• Store the result in memory

Which register stores the address of the next instruction to be fetched?

• CIR

• ACC

• MAR

• PC

What is the main role of the ALU (Arithmetic Logic Unit)?

• Control the flow of instructions

• Perform arithmetic and logic operations

• Store the result of computations

• Fetch the next instruction

Which register temporarily holds data that is being transferred to or from memory?

• ACC

• MAR

• MDR

• PC

Which of the following registers holds the current instruction being executed?

• PC

• CIR

• ACC

• ALU

The Control Unit (CU) is responsible for:

• Performing calculations

• Fetching instructions from memory

• Coordinating and controlling the actions of other components

• Storing intermediate results

During the "decode" phase of the fetch-decode-execute cycle, the instruction is:

• Executed by the ALU

• Decoded by the Control Unit to determine the operation

• Transferred from memory to the MAR

• Stored in the ACC

Which register stores the result of the ALU operations?

• CIR

• MAR

• ACC

• PC

What does the Program Counter (PC) do after fetching an instruction?

• It resets to zero.

• It is incremented to point to the next instruction.

• It decodes the instruction.

• It stores the result of the execution.

What is the role of the MAR (Memory Address Register)?

• Store data temporarily

• Store the address of the memory location to be accessed

• Perform arithmetic operations

• Store the current instruction