Question

Null value is the special value which represents:

Hint:

Understand that NULL in a database or computer system means 'unknown' or 'missing information'. It's not the same as 0 (zero) or "" (empty string), which are actual values.

Answer 1

In database management and computerised accounting systems, a 'NULL' value is used to represent a missing or unknown value in a data field. It specifically indicates the absence of data, distinct from a value of zero or an empty string. \begin{itemize} \item[(A)] Stores value items: Incorrect. Null doesn't store a value. \item[(B)] Data with many values: Incorrect. Represents absence of a value. \item[(C)] Absence of data items: Correct. Null signifies that no value has been entered or is known for that field. \item[(D)] Single value data item: Incorrect. Represents absence, not a single value. \end{itemize}