Explanation

• An Operating System (OS) is system software.
• It manages computer hardware and provides a platform for running application software.
• It acts as an interface between the user and computer hardware.

Functions of an Operating System:

• Allocates resources
• Monitors activities
• Manages disks and files

Last verified on 02-07-2026

Explanation

• The shortcut key to print a document is Ctrl + P.

Additional Information:

• Hyphen (-) is used to select a range for printing a document.
  
• By default, the documents are printed in portrait-oriented mode.
• Ctrl + A = select all
• Ctrl + B = Bold
• Ctrl + I = Italic
• Ctrl + P = Print
  
• Ctrl + Y = Redo
• Ctrl + S = Save

Last verified on 26-05-2026

Explanation

• DOCX is the newer version of DOC, the original official Microsoft Word file format. 
• Microsoft Word 97 - 2003 Document extension (.doc).
• Microsoft Word 2007 to till date Document extension (.docx).

Additional information:

• .xls extension of Excel.
• .ppt extension of PowerPoint.
• .txt extension of Text files.
• .pdf extension of Portable Document Format.

Last verified on 15-02-2026

Explanation

International Day of Peace (or World Peace Day), celebrated  on September 21st each year,

 dedicated to strengthening the ideal of peace between all nations and people.

International Day of Peace Established in 1981 by United Nations resolution

Theme 2025: Act now for a peaceful World

Theme 2026: Invest in Peace – For Everyone, Everywhere, Every Day

***

Explanation

Explanation

• WTO (World Trade Organization) was established on 1 January 1995.
• It succeeded GATT.
• Pakistan joined WTO on 1 January 1995.

Additional information:

• Members: 164
• Headquarters: Geneva, Switzerland
• Official Languages: English, French, Spanish

Objectives:

• Protect Intellectual Property Rights
• Promote Free Trade
• Remove Trade Quotas

Last verified on 16-01-2026

Explanation

• HTML (Hypertext Markup Language) is the standard markup language used for creating web pages.
• It is the backbone of webpage development.
• It providing the structure and content that appears on the web.

Last verified on 08-08-2026

Explanation

• Country: Australia
• Founded: 16 November 1920
• Headquarters: Mascot, New South Wales, Australia
• First International Passenger Flight: May 1935
• Full Name: Qantas Airways Limited (Originally: Queensland and Northern Territory Aerial Services)

Additional information:

• Emirates → United Arab Emirates (UAE)
• Saudia → Saudi Arabia
• Malaysia Airlines → Malaysia
• Pakistan International Airlines (PIA) → Pakistan

Last verified on 21-07-2026

Explanation

• O₃ is the chemical formula of ozone gas.
• Ozone is an allotrope of oxygen containing three oxygen atoms.
• It is mainly found in the stratosphere, where it forms the ozone layer.
• The ozone layer protects Earth from harmful ultraviolet (UV) radiation.

Last verified on 30-06-2026

Explanation

• VLOOKUP stands for Vertical Lookup.
• It is used to search for a value in the first column of a table.
• It is categorized under Lookup and Reference functions in Excel.

Last verified on 26-05-2026