Explanation

• Asadullah is the title of Hazrat Ali ibn Abi Talib (RA),
• Asadullah  means Lion of Allah
• Earning him the name Sher-e-Khuda (Lion of God).
• By his courage in battles like Badr, Uhud, and Khaybar
• The title was first given to Hamza ibn Abd al-Muttalib,
• Cousin and son-in-law of Prophet Muhammad (PBUH)
• First among children to accept Islam
• The fourth Caliph of Islam
• Martyred in 661 AD.

Nickname of the companion

Last updated by NA on 27 April 2026

Explanation

F5: Starts the slideshow from the beginning.

Shift+F5: Starts the slideshow from the current slide.

Alt+F5: Starts the presentation in Presenter View. 

Last updated 15-feb-2026

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 OSI (Open Systems Interconnection) model has seven layers

1. Layer 7: Application Layer – User interface and network applications (e.g., HTTP, FTP).
2. Layer 6: Presentation Layer – Data formatting, encryption, and compression.
3. Layer 5: Session Layer – Managing sessions between applications.
4. Layer 4: Transport Layer – End-to-end connections, flow control, and segmentation (e.g., TCP, UDP).
5. Layer 3: Network Layer – Logical addressing and routing (e.g., IP).
6. Layer 2: Data Link Layer – Physical addressing (MAC addresses) and error detection.
7. Layer 1: Physical Layer – Raw data transmission over physical media (cables, radio waves)

Last updated 15-feb-2026

Explanation

In Microsoft PowerPoint 2016, a slide-title master pair consists of a specific

Slide Master (which controls the default layout, fonts, and colors for all slides)

Title Master (which specifically defines the layout for the presentation's title slide).

Last updated 15-feb-2026

Explanation

• MS Excel 2016 can perform calculations using formulas like SUM, subtraction, multiplication, and division.
• However, a formula referring to a non-existent range or name will produce an error.

Additional information:

• =SUM(Sales)-A3: ❌ Produces an error if ‘Sales’ is not a defined range or named range.
• *=SUM(A1:A5)0.5: ✅ Multiplies the sum of A1:A5 by 0.5.
• =SUM(A1:A5)/(10-10): ✅ Produces #DIV/0! error (division by zero) but Excel can calculate it.
• =SUM(A1:A5)-10: ✅ Subtracts 10 from the sum of A1:A5.

Last verified on 07-03-2026

Explanation

• The MOD function in Excel returns the remainder after division of one number by another.
  • Syntax: =MOD(Number, Divisor)
  • Example: =MOD(10, 3) → Result = 1 (10 ÷ 3 leaves remainder 1)

Last verified on 07-03-2026

Explanation

• In MS Excel, the IF function is used to return one value if a condition is TRUE and another if it is FALSE.
  • The correct syntax always includes:
  =IF(LogicalTest, TrueResult, FalseResult)

Additional information:

• LogicalTest: Condition to evaluate (e.g., A1>50)
• TrueResult: Value returned if condition is TRUE
• FalseResult: Value returned if condition is FALSE
• Example: =IF(A1>50, "Pass", "Fail")

Last verified on 07-03-2026

Explanation

• SMTP is the standard protocol used to send emails across the internet.
• SMTP stands for Simple Mail Transfer Protocol.

Last verified on 16-02-2036

Explanation

A gateway is the primary network device designed to connect two or more networks

Use different, incompatible, or disparate protocols.

Acting as a protocol converter or "translator," 

It acts as a translator between systems so they can communicate effectively.

Last updated 15-feb-2026