Explanation

• Optical Fiber Systems are utilized in Telecommunication Systems to transmit data as light signals through thin glass or plastic fibers.
• It enabling high-speed internet, voice, and data communications over long distances.

Last verified on 03-04-2026

Explanation

• Ctrl + T: Opens a new tab
• Ctrl + N: Opens a new window
• Ctrl + Shift + W: Closes the current window and all tabs
• Ctrl + Q: Closes the current window
• Alt + Right arrow: Opens the next page from your browsing history in the current tab
• Ctrl + F4: Closes the current tab
• Alt + F4: Closes the active window
• Alt + Space then n: Minimizes the current window

Last update 0n 21-07-2026 by NA

Explanation

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, 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

• 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

Line spacing shortcuts:

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

Last verified on 07-03-2026

Explanation

• AutoContent Wizard helps users create presentations quickly by providing predefined templates and content suggestions.
  • It guides the user through slides, layout, and structure automatically.
  • Useful for beginners or fast preparation of presentations.

Last verified on 06-03-2026

Explanation

• Next Sheet: Ctrl + Page Down
• Previous Sheet: Ctrl + Page Up

Last updated 15-feb-2026