Explanation

The address field contains letters, numbers, and symbols (e.g., "House #42, Street 8").

So, it must be stored as an alpha-numeric data type to handle such mixed content.

Explanation

The getche() function in C/C++ (from the <conio.h> library) performs two actions:

1. Reads a single character from the keyboard (immediately, without waiting for Enter).
2. Echoes (displays) the character on the screen.

Explanation

"Usually" describes how often he sleeps — it modifies the verb "sleeps", so it is an adverb of frequency.

"Sleeps" is a verb, and "day" is a noun.

Explanation

Drama technique can be time-consuming and may cause self-consciousness among students.

It is less suitable for large groups.

It can sometimes make students feel threatened.

Explanation

A leader is someone who inspires, guides, and influences others with their vision and actions.

Leadership qualities like motivation, communication, and decision-making are key traits of a leader.

Explanation

In Pakistan, a government servant becomes eligible for a pension after completing 25 years of qualifying service.

If a person retires before 25 years (except on medical grounds or death), they are usually not entitled to a pension.

Explanation

The prefix dis- means "not" or "opposite of".

So disused means no longer used.

Explanation

 Function overloading allows multiple functions with the same name but different parameters.

It is a type of compile-time polymorphism, enabling code flexibility and readability.

Explanation

Changing student demographics (age, background, learning needs) require curriculum makers to frequently adapt content, teaching methods, and learning objectives.

This presents more challenges than economic or parental involvement factors.

Explanation

Registers are small, high-speed memory locations within the CPU used to store data temporarily during processing.

They are faster than RAM and crucial for CPU operations.