Computer Science for IGCSE & O level - Algorithm Design And Problem Solving (Section 8 - No. 34)

In the context of data validation, what is a 'presence check' designed to verify?

If a data value is present in the dataset.

The correctness of the data.

The data type of the data entry.

The range the data is within.

A presence check determines if a value has been entered into a data field.