Which of the Following Is Not True About a NULL

question 11

Multiple Choice

Which of the following is not true about a NULL attribute?

• A)On insertion,entering the data for that field is optional.
• B)It is an important property of an attribute.
• C)It must have a default value specified.
• D)A primary key can't be NULL.

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Definitions:

Cytoplasm

A jelly-like substance within a cell that contains the organelles, enclosed by the cell membrane.

Ribosomes

Cell organelles responsible for protein synthesis.

Nucleus

The membrane-bound organelle in eukaryotic cells that contains the genetic material.

Endoplasmic Reticulum

An organelle in eukaryotic cells comprising a network of membranous tubules and sacs, involved in protein and lipid synthesis.