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

• Web design tools are used to create and design websites.
• WordPress, Figma, and Wix are used for web design and development.
• Oracle is a database management company/system, not a design tool.

Last verified on 11-04-2026

Explanation

Group 1 total = 6 × 50,000 = Rs. 300,000  

Group 2 total = 4 × 75,000 = Rs. 300,000  

So, 1st and 2nd groups are same.

Last verified on 11-04-2026

Explanation

• When events have the same probability, they are called equally likely events.
• Each event has an equal chance of occurring.
• No event is more likely than the other.
• Used in probability theory.

Last verified on 11-04-2026

Explanation

• An open sentence contains one or more variables (unknowns).
• Its truth value is not fixed (true or false).
• It becomes true or false only after substituting values.
• Closed sentence has no unknowns.
• Closed sentence always has fixed truth value.

Last verified on 11-04-2026

Explanation

• Simple interest uses I = P × R × T, where interest depends only on the original principal.  
• Compound interest earns interest on interest.

Last verified on 11-04-2026

Explanation

• The total distance around any closed 2D shape is called perimeter.
• It is the boundary length of a shape.
• Used for shapes like square, rectangle, triangle, circle.
• It is measured in units like meters or centimeters.

Last verified on 11-04-2026

Explanation

The center is the midpoint of the diameter.

Midpoint = ((-5 + 3)/2 , (6 + (-4))/2)

= (-2/2 , 2/2)

= (-1 , 1)

Last verified on 11-04-2026

Explanation

Let son's age = x

Then Saeed's age = 2x

x + 2x = 60

3x = 60

x = 20

So Saeed's age = 2 × 20 = 40

Last verified on 11-04-2026

Explanation

If wheat = 100

Then sugar = 100% more = 100 + 100 = 200

So sugar : wheat = 200 : 100 = 2 : 1

Last verified on 11-04-2026