Explanation

• MAR (Memory Address Register): Stores the address of the data.
• MDR (Memory Data Register/Buffer Register): Stores the actual data/instruction fetched from or written to that memory address.
• Accumulator: Stores the results of calculations performed by the ALU.

Last updated question by NA on 07 May 2026

Explanation

• RAM is the main temporary memory of a computer.
• It stores data and instructions while the computer is working.
• When power is off, RAM data is erased.

Additional information:

• ROM → Permanent memory (read-only)
• Hard Disk → Long-term storage
• SSD → Fast permanent storage
• Cache Memory → Ultra-fast CPU memory

Last verified on 07-05-2026

Explanation

• Desktop computers (Personal Computers)
• Used for individual (personal) work
• Fixed setup (monitor, CPU, keyboard, mouse)
• Common in homes, schools, and offices
• Also known as desktop PCs

Last updated by NS on 06 May 2026

Explanation

• The ALU (Arithmetic Logic Unit) is the core component of the CPU.
• It performs both arithmetic operations (calculations) and logical operations (comparisons).
• Without ALU, a computer cannot process data.
• ALU works together with the Control Unit (CU).

Last verified on 06-05-2026

Explanation