Instruction Cycle Quiz

Which of the following is the first phase of the instruction cycle?

• Execute

• Decode

• Fetch

• Write Back

What happens during the decode phase in the instruction cycle?

• Data is fetched

• Instruction is interpreted

• Results are stored

• ALU performs calculations

Which register holds the next instruction to be executed?

• Instruction Register

• Program Counter

• Memory Address Register

• Accumulator

During the fetch phase, the CPU retrieves the instruction from the:

• ALU

• Cache

• Memory

• I/O Module

The final phase of the instruction cycle is:

• Execute

• Fetch

• Decode

• Write Back

Which of the following is an example of a memory-reference instruction?

• ADD

• CMA

• IN

• CLA

In memory-reference instructions, which register holds the memory address?

• Instruction Register

• Program Counter

• Memory Address Register

• Stack Pointer

What does the instruction "STA X" do in memory-reference instructions?

• Store data from memory to X

• Store accumulator content to X

• Add content of X to the accumulator

• Subtract the content of X

The memory reference instruction "LDA X" means:

• Load X into the accumulator

• Add X to memory

• Load the program counter

• Load the instruction register

The accumulator in memory-reference instructions stores:

• Data being fetched

• The next instruction

• Address of data

• Intermediate results