Explanation

• The main function of a Hard Disk Drive (HDD) is to store data and programs permanently.
• HDD is a secondary storage device used in computers.
• It stores the operating system, software, and user files even when the computer is turned off.
• It provides large storage capacity compared to primary memory (RAM).
• HDD stores data magnetically on rotating disks.

Last verified on 10-07-2026

Explanation

• A printer is an example of a hard copy output device.
• A printer produces a physical copy of digital information on paper.
• Hard copy can be touched and stored physically.
• Printers and plotters are common examples of hard copy output devices.

Last verified on 30-06-2026

Explanation

• An operating system manages computer hardware and software resources.
• It uses hardware efficiently and provides services to applications.
• It allows programs to run smoothly and interact with hardware.
• It acts as an interface between users, applications, and hardware.

Last verified on 08-06-2026

Explanation

• In the standard MS Word Font Size toolbar list, sizes range from 8 to 72.
• These are the default preset font sizes shown in the dropdown menu.
• However, Word manually supports font sizes from 1 to 1638.
• Shortcut to change font size: Ctrl + Shift + P.
• Font size is measured in points (pt).

Last verified on 29-05-2026

Explanation

• The Input Unit takes data and instructions from the user.
• Examples include keyboard, mouse, scanner.
• It sends the data to the CPU for processing.

Last verified on 25-05-2026

Explanation

• The Control Unit (CU) is part of the CPU.
• It interprets instructions from memory.
• It directs and coordinates all computer operations.
• It acts like the “brain controller” of the computer system.

Last verified on 24-05-2026

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

• 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