Fetch-Decode-Execute Cycle Quiz

Describe fetch – decode – execute cycle with the help of a diagram.

What are the three steps of instruction cycle?

What does the Program Counter (PC) hold?

• The address of the next instruction to be executed.

• The current instruction being executed.

• The address of the last executed instruction.

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

• It holds the address of the next instruction.

• It holds the address from the Program Counter.

• It fetches the instruction from memory.

What does the Control Unit (CU) do during the decode operation?

• It executes the instruction.

• It decodes the instruction in the Current Instruction Register.

• It fetches the instruction from memory.

What is generated by the Control Unit based on the decoded instruction?

• Control signals.

• Data signals.

• Memory addresses.

What may the instruction perform during execution?

• Arithmetic operations.

• Data storage.

• Both A and B.

What happens to the result of the operation after execution?

• It is stored back in a register.

• It is sent to memory.

• Both A and B.