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

• In MS Excel, a single page where data is entered is called a worksheet.
• Multiple worksheets make up an Excel workbook.
• Worksheets contain cells arranged in rows and columns for data entry and calculations.

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

• GDP (Gross Domestic Product) measures the total monetary value of all goods and services produced within a country in a specific time period, usually one year.

Additional information:

Components of GDP:

• Consumption (household spending)
• Investment (business spending)
• Government spending
• Net exports (exports − imports)

Last verified on 09-02-2026

Explanation

• Man-made disasters are caused by human activities rather than natural events.
• Industrial accidents (e.g., chemical spills, factory explosions) are directly caused by humans.

Additional information:

Examples of industrial accidents:

• Bhopal gas tragedy, 1984
• Chernobyl nuclear disaster, 1986

Last verified on 09-02-2026