Computer Architecture Quiz

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

• Execute the instruction

• Decode the instruction

• Fetch the instruction

• Store the result

Which register stores the instruction currently being executed?

• MAR

• CIR

• ACC

• MDR

What happens during the decode phase of the cycle?

• The ALU performs calculations

• The instruction is interpreted by the Control Unit

• Data is transferred to the MDR

• The PC resets

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

• It resets to zero

• It points to the next instruction

• It executes the instruction

• It holds the current instruction

Which component performs calculations and logical operations?

• MAR

• MDR

• ALU

• CU

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

• Holds the address of the next instruction

• Stores the instruction being executed

• Performs arithmetic operations

• Controls data flow

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

• PC

• MAR

• MDR

• CIR

The role of the Control Unit (CU) is to:

• Store temporary data

• Execute instructions

• Manage and coordinate CPU operations

• Perform arithmetic operations

Where are the results of ALU operations stored?

• PC

• ACC

• CIR

• MDR

What is the function of an assembler?

• Convert assembly language into machine code

• Translate each line of code as it runs

• Convert high-level code into machine code

• Debug programs automatically