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

Explanation

• Processor: Executes instructions.
• Scanner: Converts documents into digital images.
• Router: Connects networks.

Last updated on 26 Oct 2026

Explanation

• Writing: Storing or saving data in a memory location.
• Reading: Retrieving data from a memory location.
• Processing: Performing operations on data.
• Retrieving: Accessing stored data.

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