Explanation

• A pixel (picture element) is the smallest addressable element of a digital image or display screen.
• A screen is made up of millions of pixels arranged in rows and columns.

Additional information:

• Byte: A unit of digital data, normally 8 bits.
• Bit: The smallest unit of digital data, represented as 0 or 1.

Last verified on 05-10-2026

Explanation

• A computer mouse is a handheld hardware input device.
• It is used to control the cursor in a GUI (Graphical User Interface).
• It helps in pointing, moving, and selecting items on a computer.

Last verified on 04-10-2026

Explanation

• USB stands for Universal Serial Bus.
• It allows communication and data transfer between a computer and peripheral devices.
• Common USB devices include mouse, keyboard, printer, scanner, and external hard drive.

Last verified on 29-09-2026

Explanation

• The Motherboard is the main circuit board of a computer.
• It holds or provides connections for the CPU, RAM, ROM, and expansion cards.
• It allows different computer components to communicate with each other.

Additional information:

• CPU → Processes instructions
• RAM → Temporary memory
• ROM → Stores permanent/basic instructions
• Expansion cards → Add extra functions to a computer

Last verified on 29-09-2026

Explanation

• A keyboard is an input device.
• Mainly used to enter text, numbers, and commands.
• Contains alphabetic, numeric, and function keys.
• Common shortcut keys include Ctrl, Alt, Shift, and Enter.