Explanation

• "An entity is anything about which we store data" is True.
• An entity is any real-world object or concept the database stores information about.
• Examples: customer, product, employee, order.

Explanation

The correct data processing sequence is Input → Processing → Output → Storage.

• Input is the stage where raw data is entered into the computer.
• Processing converts raw data into meaningful information.
• Output presents the processed information to the user.
• Storage saves the data or information for future use.

Last verified on 01-08-2026

Explanation

++ adds 1 to a variable.

• a++ (post): uses the value, then increments.
• ++a (pre): increments, then uses value.
• -- decrements the same way.
• Alone in a statement, both forms behave identically.

Explanation

• A += B is equivalent to A = A + B.
• It's the compound assignment operator for addition.
• It takes the current value of A, adds B to it, and stores the result back into A.

Other compound operators follow the same pattern:

• A -= B → A = A - B
• A *= B → A = A * B
• A /= B → A = A / B
• A %= B → A = A % B

Explanation

• fclose() returns 0 on success and EOF (-1) on failure.
• It flushes any buffered data to the file before closing the stream
  For the standard input/output streams (stdin, stdout, stderr),