Explanation

• Computer system has different parts for input, output, and processing.
• The main processing work is done by a special unit called CPU.
• It executes all instructions given by the user or programs.
• It also controls all other components of the computer.
• Therefore, CPU is known as the brain of the computer.

Last verified on 14-05-2026

Explanation

• The output unit of a computer presents processed data to the user.
• It converts machine results into human-readable form.
• It can be visual, audio, or printed form.
• Common output devices include monitor and printer.

Last verified on 13-05-2026

Explanation

• The output unit converts processed digital data into human-readable form such as text, images, or sound.

• It shows the results of computer processing to the user.

• Common output devices include monitor, printer, speaker, and projector.

Last verified on 09-05-2026

Explanation

• A computer uses memory to store data and instructions.
• Some memory is for permanent storage, while some is for temporary use.
• During processing, the CPU needs fast-access memory.
• This temporary working memory is called RAM (Random Access Memory).
• It stores data and instructions currently in use.

Last verified on 08-05-2026

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

Explanation