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