Explanation

Agencies use secure wireless systems to avoid tracking or interception.

It helps protect the location and identity of agents during communication.

Explanation

Wireless communication allows quick, remote data transfer without physical connections.

It's commonly used by agencies for mobility, flexibility, and real-time communication.

Explanation

An Alternate key is any candidate key not chosen as the primary key.

It can still uniquely identify records, but isn't used as the main identifier.

Explanation

The Internal level in DBMS describes how data is physically stored in the database.

It is the closest level to the physical storage, dealing with file structures and indexes.

Explanation

There are 7 basic logic gates:

1. AND
2. OR
3. NOT
4. NAND
5. NOR
6. XOR
7. XNOR

These gates form the foundation of digital electronics and computing.

Explanation

The single equals sign = is used for comparison in SQL conditions.

The query correctly filters rows where the Job column matches the string 'Clerk'.

Explanation

cin >> age; is the correct syntax in C++ to take input from the user and store it in the variable age.

The >> operator is used with cin to extract the input value into the variable.

Explanation

clrscr() is a function used to clear the console screen in C/C++ (usually with conio.h library).

It helps to remove previous output before displaying new information on the screen.

Explanation

Process P2 starts at time 16 and finishes at time 23.

Finish time is the time when the process completes execution in FCFS.

Explanation

.obj files are object files generated during compilation before linking into an executable.

.pdf and .pptx are document formats.

.cpp is C++ source code.