Which CPU component performs arithmetic and logical operations?

Question

BlackTom AI · Accepted Answer

Question: Which CPU component performs arithmetic and logical operations?

Option a. ALU
The Arithmetic Logic Unit (ALU) is the part of the CPU responsible for performing arithmetic operations (like add, subtract, multiply, divide) and logical operations (such as AND, OR, NOT, XOR). Its primary role is to execute the basic calculations and decision-making comparisons that drive program logic. This aligns exactly with the description in the question.

Option b. Decoder
A decoder translates encoded instructions into signals that control other parts of the processor. It interprets opcodes to activate the appropriate circuitry but does not perform arithmetic or logical computations itself. Its function is more about instruction decoding and directing data paths rather than performing math.

Option c. Instruction Pointer
The Instruction Pointer (also known as the program counter) holds the address of the next instruction to be fetched from memory. It governs the sequence of instruction execution, ensuring the CPU fetches the correct instruction in order. It does not carry out arithmetic or logical operations.

Option d. Register File
The Register File is a collection of small, fast storage locations within the CPU used to hold operands and results temporarily during computation. While it stores data used by the ALU and other units, the actual arithmetic and logical processing is carried out by the ALU, not by the registers themselves.

Summary: Among the listed components, the one designed to execute arithmetic and logical computations is the ALU, whereas the other options describe parts involved in instruction decoding, program flow, or data storage rather than performing the computations themselves.

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