Explanation

• Serial communication transmits data one bit at a time over a single channel or wire.
• It is ideal for long-distance communication because it reduces signal degradation and cost.
• Slower than parallel communication but more reliable over long cables.

Last verified on 09-02-2026

Explanation

• In programming and mathematics, operator precedence determines the order in which operations are performed.
• Multiplication (*) has higher precedence.
• Example: 2 + 3 * 4 → First multiply → 3*4=12, then add → 2+12=14.

Last verified on 09-02-2026

Explanation

• RAM (Random Access Memory) is the main memory of a computer where data and programs in use are temporarily stored.
• If a computer does not have enough RAM, it cannot run multiple programs efficiently.
• RAM is volatile memory, meaning it loses data when the computer is turned off.

Last verified on 09-02-2026

Explanation

• In a star topology, all devices are connected to a central device called a hub.
• The hub acts as a common connection point, transmitting data between devices.
• If the central hub fails, the entire network is affected.

Last verified on 09-02-2026

Explanation

• A stack is a linear data structure that follows LIFO (Last In, First Out) principle.
• push() → Adds an element to the top of the stack.
• pop() → Removes the element from the top of the stack.

Last verified on 09-02-2026

Explanation

• A variable is a named memory location that can store data which may change during program execution.
• Used to hold values, perform calculations, and control program flow.

Examples in programming:

• int age = 25; → age is a variable storing 25
• float price = 99.99; → price is a variable storing 99.99

Last verified on 09-02-2026

Explanation

• The <p> tag in HTML defines a paragraph.
• Browsers automatically add space before and after the paragraph text.
• It is used to structure text content on a webpage.

Additional information:

• <br> → Inserts a single line break.
• <hr> → Inserts a horizontal line.

Last verified on 09-02-2026

Explanation

• Mac OS is the operating system developed by Apple Inc. for its Mac computers.
• First introduced in 1984 with the original Macintosh.
• Known for its user-friendly interface, stability, and security features.

Additional information:

• Android → Developed by Google
• Windows → Developed by Microsoft

Last verified on 09-02-2026

Explanation

• Linear data structure Definition: Data elements are arranged sequentially in a single line/order
• Access: Each element has a unique predecessor and successor (except first/last)
• Examples: Array, Linked List, Stack, Queue, String

Last verified on 08-02-2026

Explanation

• In a twisted pair cable, wires are twisted together to reduce electromagnetic interference (noise).
• Less noise means the signal stays clearer over longer distances.
• Twisting helps cancel out external interference and crosstalk between pairs.

Last verified on 08-02-2026