Explanation

The three major DVD formats are:

1. DVD-ROM: Read-only.

2. DVD-R / DVD+R: Recordable (write once).

3. DVD-RW / DVD+RW: Rewritable (erase and record again).

Last updated 06 Nov 2026 by NA

Explanation

• A printer is an output device that transfers digital information from a computer onto a physical medium, most commonly paper. 

Additional information:

Scanner:

Used to digitize physical documents or images, converting them into digital data.

Monitor:

An output device that displays visual information from a computer, but it does not produce physical copies on paper.

Keyboard:

An input device used to enter text and commands into a computer. 

Last updated by NA on 05-11-2026

Explanation

• Data Processing: Performs calculations and operations.
• Data Storage: Stores data and information.
• Data Movement: Transfers data between devices.
• Control: Manages computer operations.

Last updated by NA on 05-11-2026

Explanation

• A Dot Matrix Printer uses an ink ribbon.
• It is an impact printer that prints by striking pins against the ribbon and paper.

Additional information:

• Laser Printer: Uses toner powder and a laser beam.
• Inkjet Printer: Sprays tiny droplets of liquid ink.
• Thermal Printer: Uses heat-sensitive paper.

Last updated by NA on 04-11-2026

Explanation

• The physical part of a computer is called hardware.
• Hardware refers to all the tangible parts of a computer that contribute to its functionality.
• Some examples of hardware include:
• Motherboard, RAM, CPU, Mouse, Keyboard, CD, DVD, Hard disk, Monitor, and Case.

Additional information:

• In contrast, software is the intangible part of a computer that helps it perform its functions.
• Software is made up of programs, procedures, and routines that run the computer system.

Last verified on 04-09-2026