A-level FDE cycle (video)

What occurs immediately after the fetch stage in the fetch-decode-execute cycle?

• Data is written back to memory.
• The instruction is decoded.
• The program counter is updated.
• The instruction is executed.

Which of the following best describes the fetch-decode-execute cycle?

• A method for storing data in memory.
• A continuous repetitive cycle that occurs billions of times a second.
• A single operation performed by the CPU.
• A process that only occurs during program initialization.

Which of the following statements accurately describes the fetch-decode-execute cycle?

• It is a one-time process that occurs at program startup.
• It only applies to high-level programming languages.
• It involves fetching, decoding, and executing instructions in a continuous loop.
• It is primarily concerned with data storage rather than instruction processing.

What is the primary function of the program counter in the fetch-decode-execute cycle?

• To execute the instruction immediately.
• To hold the address of the next instruction to be executed.
• To decode the instruction's op code.
• To store the data being processed.

What is the first action taken in the fetch-decode-execute cycle?

• Reading data from memory.
• Executing the instruction.
• Decoding the instruction.
• Checking the program counter.

What is the role of the control bus in the fetch-decode-execute cycle?

• To fetch the next instruction.
• To store instructions temporarily.
• To send control signals to various components.
• To carry data between the CPU and memory.

During which stage of the fetch-decode-execute cycle is the instruction copied into the current instruction register?

• Decode stage
• Execute stage
• Memory stage
• Fetch stage

What does the decode stage of the fetch-decode-execute cycle involve?

• Interpreting the op code and operand of an instruction.
• Reading data from memory.
• Updating the program counter.
• Copying data to the accumulator.

What is the purpose of the opcode in an instruction during the fetch-decode-execute cycle?

• To hold the address of the next instruction.
• To store temporary data during execution.
• To specify the operation to be performed.
• To indicate the type of data being processed.

What is the role of the memory address register during the execute stage?

• To copy the address stored in the program counter.
• To store the results of the execution.
• To hold the instruction to be executed.
• To send the address to main memory.