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Explanation

• The shortcut key for Undo (last action reverse) is Ctrl + Z in most computer systems.
• It is used to cancel the last mistake or action.

Additional information:

• Ctrl + P = Print
• Ctrl + Y = Redo
• Ctrl + S = Save
• Ctrl + C = Copy command
• Ctrl + V = Paste
• Ctrl + C = Copy
• Ctrl + X = Cut
• Ctrl + Y = Redo

Last verified on 10-06-2026

Explanation

• Europe is the only continent without a desert.
• It has a temperate climate with sufficient rainfall.

Additional information:

• Divided by the Ural Mountains
• Second-smallest continent
• Covers 2% of Earth’s surface
• Area: 10.18 million km²

Last verified on 16-01-2026

Explanation

• Email stands for Electronic Mail.
• It is a method of sending and receiving digital messages through the internet.
• The term electronic mail has been used with its modern meaning since 1975.
• The shorter form E-mail became common around 1979.

Additional information:

Parts of a valid email address:

1. Email Prefix
2. Email Domain

Address: example@mail.com

1. example = Email Prefix
2. mail.com = Email Domain

Last verified on 16-06-2026

Explanation

• CPU stands for Central Processing Unit.
• It is the main part of a computer that processes all instructions.
• It is considered the brain of the computer system.
• It performs all calculations and decision-making tasks.
• It controls the operations of all hardware and software.
• It is located on the motherboard.

Last verified on 10-06-2026

Explanation

• Host: Hazrat Abu Ayyub al-Ansari (RA)
• Duration: Approximately 7 months (about 210 days)
• After: Hijrah to Madinah
• Until: Completion of Masjid an-Nabawi ﷺ and adjoining rooms

Additional information:

• Abu Ayyub al-Ansari (RA)
• Real Name: Khalid bin Zayd (RA)
• Tribe: Banu Khazraj, Banu Najjar

Explanation

• BCC stands for: Blind Carbon Copy
• Used in: Email communication
• Purpose: Hides recipient email addresses from other recipients

Additional information:

• CC (Carbon Copy): Recipients are visible to all
• BCC: Recipients are hidden from everyone except the sender

Last verified on 16-01-2026

Explanation

• Conquest of Sindh: 712 AD
• Battle: Aror (near Rohri)
• Opponent: Raja Dahir (killed in battle)
• He attacked Sindh on orders of the Umayyad Caliph through Hajjaj bin Yusuf.
• Death: 18 July 715 AD

Major cities captured:

• Nirun
• Debal (Sikka fortress)
• Brahmanabad
• Alor (Aror)
• Multan

Last verified on 01-04-2026

Explanation

The F4 key is commonly used to repeat the last action in programs like Microsoft Word and Excel.

For example, if you format text or perform a specific action, pressing F4 will repeat it.

Last updated question by NA on 07 May 2026

Explanation

• "The Statue of Liberty" was a gift from France to the USA.
• It dedicated on October 28, 1886.
• It recognized as a universal symbol of freedom.
• It is located in New York.
• It has a height of 93 meters.
• The construction started in 1876.
• The construction was completed in 1886.
• It is designed by French sculptor Frederic Auguste Bartholdi.
• It was designated on October 15, 1924.

Last Updated by NA on 13-01-2026

Explanation

• Belgium is known as the “Cockpit of Europe.”
• The nickname refers to the many major European battles fought on Belgian territory.
• Belgium is located in Western Europe.

Additional information:

• Capital: Brussels
• Currency: Euro (€)
• Official languages: Dutch, French, and German

Last verified on 28-09-2026