Explanation

• DOS stands for Disk Operating System.
• It is an early type of computer operating system used to manage files and programs.
• It works through text-based commands (command line).
• A famous example is MS-DOS used in early PCs. 
• Dennis Ritchie is the father of MS-DOS.
• It was developed in 1982.

Last verified on 19-04-2026

Explanation

The size of information in the computer is measured in: 

• 1024 kilobytes (KB) is equal to 1 megabyte (MB).
• One Megabyte (MB) = 1024 Kilobytes (KB
• One Gigabyte (GB) =  1024 Megabytes MB
• One Terabyte (TB)= 1024 gigabytes (GB).

Explanation

Explanation

• A bit (binary digit) is the smallest unit of data in a computer.
• It can have a value of 0 or 1, representing two possible states.

Additional information:

• 1 Byte = 8 bits
• 1 Kilobyte (KB) = 1024 Bytes
• 1 Megabyte (MB) = 1024 KB
• 1 Gigabyte (GB) = 1024 MB
• 1 Terabyte (TB) = 1024 GB

Last verified on 12-03-2026

Explanation

To insert a page break in Microsoft Word, you can press Ctrl + Enter on your keyboard:

• Place your cursor where you want the page break to occur
• Press Ctrl + Enter

You can also insert a page break by clicking the Breaks button in the Page Setup group on the Layout tab of the Ribbon.

Then, choose the Page option from the drop-down menu.

A page break is a special marker that ends the current page and starts a new one.

Last verified on 03-04-2026

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

• PowerPoint is used for Create presentations from scratch or a template.
• Add text, images, art, and videos.
• Select a professional design with PowerPoint Designer.

Last verified on 03-04-2026

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