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

Explanation

• Data entered through the keyboard is temporarily stored in RAM.
• RAM holds data and programs currently being used.
• It is a volatile memory.
• Data in RAM is lost when the computer is turned off.

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