Explanation

Scratch is a visual programming language where users create programs by dragging and connecting code blocks.

It is mainly used for educational purposes to teach programming concepts in a simple, interactive way.

Explanation

Hertz (Hz) is the unit used to measure the frequency of an analog signal, and higher frequency means higher bandwidth.

Bandwidth in analog signals refers to the range of frequencies, which is expressed in Hertz.

Explanation

Boot sector viruses often spread through .exe files, which are executable and can run malicious code when opened.

These files can infect the boot sector when the system starts, making them a common carrier for such viruses.

Explanation

In Consolidated Data Distribution, all data is stored at one central site.

This simplifies management but may reduce access speed for remote users.

Explanation

PROM is Programmable Read-Only Memory, which can be written only once and cannot be modified or erased.

If an error occurs, the chip must be replaced, not corrected or reformatted.

Explanation

The verb "equip" fits grammatically in the infinitive form after "to" — "to equip the child..."

"Equip" means to provide necessary tools or skills, which is the goal for helping a child enter college.

Explanation

"Friend : Foe" shows a relationship of opposites (antonyms).

Similarly, "Beautiful : Ugly" is also a pair of opposites.

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

A transmission medium is a channel through which data is transmitted — satellite systems are used to transmit signals over long distances.

LED TV or video camera are devices, not mediums for data transmission.