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Question

Which of the following are main subsystems of the Central Processing Unit (CPU)?

This question was previously asked in
RRB NTPC 2024 CBT 1 Question Paper (28-Aug-2025) (Shift 3)
The correct answer is
Control Unit, Arithmetic Unit and Logic Unit

Understanding CPU Main Subsystems

The Central Processing Unit (CPU) consists of essential internal components that manage and execute instructions. Identifying these core parts is crucial for understanding CPU functionality.

Key CPU Subsystems

The primary subsystems comprising the CPU are:

  • Control Unit (CU): This unit coordinates all activities within the CPU and manages the flow of data and instructions between the CPU and other components of the computer.
  • Arithmetic Logic Unit (ALU): Responsible for performing all arithmetic calculations (addition, subtraction, multiplication, division) and logical operations (comparisons like AND, OR, NOT).
  • Logic Unit: While often integrated within the ALU, the logic component specifically handles decision-making based on comparisons.

Therefore, the Control Unit, Arithmetic Unit, and Logic Unit are recognized as the main subsystems of the CPU.

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