Explanation

• Kilometers per second: ≈ 300,000 km/s
• Speed in vacuum: 299,792,458 m/s
• Approximate value: 3 × 10⁸ m/s
• Symbol: c
• Distance traveled in 1 second: About 300,000 km
• Light from the Sun takes about 8 minutes 20 seconds to reach the Earth.

Last verified on 16-05-2026

Explanation

• To edit or rename a file or folder, simply hit F2 when your file is selected.

Additional information:

Key Function Keys (F1–F12)

1. F1 – Opens Help
2. F2 – Rename selected file/folder (Windows) / Edit active cell (Excel)
3. F3 – Opens Search
4. F4 – Alt + F4 closes the active window
5. F5 – Refreshes browser / Starts Slide Show in PowerPoint
6. F6 – Moves to the next pane in Microsoft Word
7. F7 – Spelling & Grammar Check
8. F8 – Enables Extend Mode in Excel
9. F9 – Updates/Refreshes fields in Microsoft Word
10. F10 – Activates the Menu Bar
11. F11 – Full-screen mode in browsers
12. F12 – Save As in Microsoft Word

Last verified on 09-07-2026

Explanation

• Windows NT is not application software; it is an Operating System.
• It is a proprietary graphical operating system developed by Microsoft.
• The first version of Windows NT was released on 27 July 1993.
• Examples of Application Software: Microsoft Word (WinWord XP), Adobe PageMaker, MS Excel, PowerPoint, Adobe Photoshop

Last verified on 10-07-2026

Explanation

• Type: Operating System (Unix-like)
• Kernel Released: 17 September 1991
• Developer: Linus Torvalds
• License: Open-source (GNU General Public License)
• Common Distributions: Ubuntu, Debian, Fedora, Red Hat, Linux Mint

Last verified on 10-07-2026

Explanation

• The Khutba of Hajj is delivered at Masjid an-Namirah (Masjid-e-Nimra) on the Day of Arafah.
• It is delivered on 9th Dhul-Hijjah before the Dhuhr and Asr prayers.
• Masjid an-Namirah is located on the Plain of Arafat near Mount Arafat.

Last verified on 09-07-2026

Explanation

• In MS Word, Header and Footer options are found in the Insert tab.
• Headers appear at the top of the page, while footers appear at the bottom.
• They are used for page numbers, dates, titles, and document information.
• This feature helps in professional document formatting.

Last verified on 29-05-2026

Explanation

• Bit stands for Binary Digit.
• A bit is the smallest unit of data in a computer.
• Represents 0 or 1 (off/on state)
• 8 bits = 1 byte
• Used in all digital systems and computer memory.

Last verified on 08-06-2026

Explanation

There are three obligatory acts of Hajj, known as the pillars of Hajj: 

1. Ihram
2. WUF
   
3. Tawaf al-Ifadah

Additional Information:

Hajj means "to intend."

Hajj was made compulsory in 9 A.H.

Hajj is ordained in Surah Al-Baqarah.

The Prophet Muhammad performed only one Hajj in 10 A.H.

There are three types of Hajj.

One Tawaf of Kaaba is known as a Shoot, which begins from the Shoot.

There are three Jamarat.

The mosque in Mina is Kheef.

At Meekat, Hujjaj assume the state of Ihram.

Kalima Tauheed is recited during Hajj.

The ritual of offering sacrifice is performed at Mina.

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Last updated by NA on 25-April-2026

Explanation

A webpage address is called a URL,

URL: Uniform Resource Locator.

URL consists of five parts:

1. Scheme
2. Subdomain
3. Top-level domain
4. Second-level domain
5. Subdirectory

Last updated 18-02-2026

Explanation

• In MS Word, Ctrl + ] increases the font size of selected text by 1 point.
• Similarly, Ctrl + [ decreases the font size by 1 point.

Additional information:

• Shortcut to increase font: Ctrl + ]
• Shortcut to decrease font: Ctrl + [

Last verified on 07-03-2026