Computer Architecture Quiz

What is the initial step in the fetch-decode-execute cycle?

• Decode the instruction

• Execute the instruction

• Fetch the instruction from memory

• Store the result in memory

Which register holds the address of the next instruction to fetch?

• ACC

• CIR

• PC

• MAR

What is the primary function of the ALU (Arithmetic Logic Unit)?

• Control the flow of instructions

• Perform arithmetic and logical operations

• Fetch the next instruction

• Store computation results

Which register temporarily stores data being transferred to or from memory?

• ACC

• MAR

• PC

• MDR

Which register holds the current instruction being executed?

• CIR

• ACC

• ALU

• PC

What is the role of the Control Unit (CU)?

• Store intermediate results

• Coordinate and control other components

• Fetch instructions from memory

• Perform calculations

What happens during the "decode" phase of the fetch-decode-execute cycle?

• The instruction is transferred to the MAR

• The ALU executes the instruction

• The ACC stores the instruction

• The Control Unit decodes the instruction to determine the operation

Which register stores the results of ALU operations?

• PC

• CIR

• MAR

• ACC

What happens to the Program Counter (PC) after fetching an instruction?

• It decodes the instruction.

• It increments to point to the next instruction.

• It stores the execution result.

• It resets to zero.

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

• Store the memory location address

• Perform arithmetic operations

• Store the current instruction

• Temporarily hold data