Explanation

Explanation

• CTRL + H is the shortcut key used in most software (like MS Word, Excel) to open the Find and Replace dialog box.
• It allows users to search for a word or phrase and replace it with another.

Additional information:

• CTRL + F: Only opens the Find dialog
• CTRL + G: Opens the Go To dialog
• CTRL + R: Aligns text to the right in word processors

Last updated by NA on 26 April 2026

Explanation

• LED (Light Emitting Diode) is a semiconductor device that emits light when electric current passes through it.
• It is widely used in lighting, displays, electronic indicators, and screens.

Additional information:

• Energy efficiency: Up to 90% more efficient than traditional bulbs
  First discovery: H. J. Round – 1907
  Early research: Oleg Losev – 1927
  Practical LED development: James R. Biard – 1961
  First commercial production: October 1962 (Nick Holonyak)

Last verified on 12-03-2026

Explanation

• Web Browser is a software application used to access and view websites on the Internet.
• Examples include Google Chrome, Safari, Internet Explorer, and Firefox.
• Microsoft Office is an office suite, and NetBeans is an IDE (Integrated Development Environment), not browsers.

Last verified on 10-03-2026

Explanation

• In MS Word 2016, tables are used to organize data in rows and columns.
• The minimum table size that can be created is 1 row and 1 column.

Additional information:

• Tables can be formatted, merged, or split according to need.
• Even a 1×1 table can be expanded later by adding rows or columns.

Last verified on 10-03-2026

Explanation

• In MS Word 2016, page margins define the space between the text and the edge of the page.
• Common margin types are: Top, Bottom, Left, Right.
• “Center” is not a page margin type.

Last verified on 10-03-2026

Explanation

• F8 once: Start selection mode
• F8 twice: Select current word
• F8 three times: Select current sentence
• F8 four times: Select paragraph
• F8 five times: Select entire document

Explanation

• A hardcopy output device produces physical copies of data or information.
  • Printer converts digital documents into paper copies.
  • Examples: Plotter, Photocopier, Fax machine, Braille printer

Additional information:

Softcopy vs Hardcopy:

• Softcopy: Screen display, audio (Monitor, Speaker)
• Hardcopy: Physical form (Paper, Card, etc.)

Printers can be inkjet, laser, or dot-matrix.

Last verified on 09-03-2026

Explanation

MAN (Metropolitan Area Network): City or district coverage

• LAN (Local Area Network): Small area, e.g., home, office
• WAN (Wide Area Network): Covers countries or continents, e.g., Internet
• PAN (Personal Area Network): Very small area, e.g., devices connected via Bluetooth

Explanation

Line spacing shortcuts:

• Ctrl + 1 → 1.0
• Ctrl + 2 → 2.0
• Ctrl + 5 → 1.5

Last verified on 07-03-2026