Explanation

• An antivirus software protects a computer against malware and viruses.
• It detects, blocks, and removes harmful software from a computer.
• Common threats include viruses, worms, Trojans, and spyware.
• Antivirus software helps protect files, programs, and system data.
• It can provide real-time protection against new threats.

Last verified on 12-08-2026

Explanation

• A computer is an electronic device that accepts, processes, stores, and produces information by executing a set of stored instructions.
• A computer works according to stored instructions, called a program.
• It performs both arithmetic and logical operations.
• It follows instructions sequentially, unless the program specifies a different sequence.
• The basic process is Input → Processing → Output → Storage.

Last verified on 11-08-2026

Explanation

• The CPU (Central Processing Unit) is the brain/heart of the computer.
• It performs all calculations, executes instructions, and controls other components.

Additional information:

• First commercial CPU: Intel 4004 (1971)
• Invented by: Italian physicist Federico Faggin
• CPU Examples: Clock speeds – 3.0 GHz, 3.5 GHz, 4.0 GHz, 4.5 GHz, 5.0 GHz

Last verified on 15-02-2026

Explanation

• HTML: Hypertext Markup Language.
• Purpose: Creates and structures web pages.
• HTML File Extension: .html or .htm.
• It uses tags to structure content such as headings, paragraphs, images, links, and tables.

Last verified on 11-08-2026

Explanation

• The default page orientation in MS Word is Portrait.
• Portrait orientation means the page height is greater than its width.
• This orientation is commonly used for documents, letters, and reports.

Additional information:

• Page orientation can be changed from Layout → Orientation.
• Landscape mode is mainly used for tables and wide content.

Last verified on 17-01-2026