The statements which are true regarding the fetch-execute cycle are;
A. The device responsible for performing the fetch-execute cycle is the CPU.
C. Each step of the fetch-execute cycle is performed for each instruction.
D. The order of steps in the fetch-execute cycle is fetch-decode-execute-store.
A fetch-execute cycle is also referred to as instruction cycle and it can be defined as the order of sequential steps or basic operation cycle that the central processing unit (CPU) of a computer performs to execute an instruction.
Basically, the fetch-execute cycle refers to a computer's basic operation cycle. Thus, it involves a process through which data (information) is received by the central processing unit (CPU) of a computer and determines what to do with the data (information).
Furthermore, the fetch-execute cycle comprises four (4) main phases and these includes;
- Fetch: this is the stage where an instruction is collected by the central processing unit (CPU) of a computer and prepared for decoding.
- Decode: it determines what to do with the instruction after understanding the set of commands (instruction set) received.
- Execute: the decoded instructions are then executed by the Arithmetic Logic Unit (ALU) of the central processing unit (CPU).
- Store: the output or results are then sent and written in the main memory of the computer.
In conclusion, we can deduce the following points from the above explanation;
1. The device responsible for performing the fetch-execute cycle is the central processing unit (CPU).
2. Each step of the fetch-execute cycle is performed for each instruction.
3. The order of steps in the fetch-execute cycle is fetch-decode-execute-store.
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