Arrange the instruction cycle in correct sequence:

A. Decode
B. Store
C. Fetch
D. Execute

Choose the correct answer from the options given below:

Correct option is B

The instruction cycle refers to the cycle in which a CPU retrieves and executes instructions. The correct order of the instruction cycle is:

1. C. Fetch: The first step is fetching the instruction from memory. The CPU fetches the instruction that is stored in memory.

2. A. Decode: Once the instruction is fetched, it is decoded. This means that the CPU interprets the instruction to understand what operation needs to be performed.

3. D. Execute: The next step is the actual execution of the instruction. The CPU performs the operation specified by the decoded instruction.

4. B. Store: Finally, if the instruction involves storing data (such as a result of an arithmetic operation), the result is written back into memory or a register.

Information Booster:

1. Fetch: The first step in the instruction cycle is to fetch the instruction from memory. The CPU uses the program counter (PC) to find the address of the instruction to retrieve. The instruction is then placed in the instruction register (IR).

2. Decode: During the decode stage, the CPU interprets the fetched instruction. This involves breaking the instruction into opcode (operation code) and operand (data or memory address). The control unit decodes the instruction and prepares the necessary signals for the execution.

3. Execute: In the execute phase, the CPU carries out the operation specified by the instruction. This could involve arithmetic or logical operations, memory access, or control operations. The CPU performs the work using its ALU (Arithmetic Logic Unit), registers, or memory.

4. Store: If the instruction requires storing the result of the operation, this is the final step. The result is written back to memory or registers. For example, in data transfer instructions, the result is stored in a register or memory location.

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