Paper 1 · ICT
UGC NET June 2023 (14.06.2023) Shift-II
Which of the following components are part of the central processing unit (CPU) of the Von Neumann model for a computer system?
- Arithmetic Logic Unit (ALU)
- Hard Disk Drive (HDD)
- Memory Address Register (MAR)
- Solid State Drive (SSD)
- Control Unit (CU)
A1 & 5 only
B2, 3 & 4 only
C1 & 3 only
D1, 3 & 5 only ✓ Correct
Correct answer: (D) 1, 3 & 5 only — The CPU parts are the ALU, MAR and control unit, so the answer is 1, 3 and 5.
Explanation
★The CPU parts are the ALU, MAR and control unit, so the answer is 1, 3 and 5.
★The Von Neumann model, proposed in 1945, stores instructions and data in the same memory.
★The arithmetic logic unit performs all arithmetic and logical operations.
★The control unit directs the flow of data and instructions inside the processor.
★The memory address register holds the address of the memory location being accessed.
★The hard disk drive and solid state drive are secondary storage, not parts of the CPU.
★So only the ALU, MAR and control unit lie within the central processing unit.
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