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

• 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

• The Control Unit (CU) is a part of the CPU that manages and directs all computer operations.
• It fetches instructions from memory, decodes them, and coordinates execution by other units.
• Ensures smooth operation of arithmetic, logic, and input/output processes.

Last verified on 09-02-2026

Explanation

A connected graph with n vertices and n-1 edges is always a tree.

It has no cycles and ensures a unique path between any two vertices.

Explanation

A tree is a connected graph with no cycles.

It has n nodes and (n-1) edges, ensuring a unique path between any two nodes.

Explanation

An equivalence relation must be reflexive, symmetric, and transitive.

These three properties together define equivalence among elements in a set.

Explanation

A relation is reflexive if every element is related to itself.

Only the set (1,1), (2,2), (3,3) satisfies this condition.