Computer Science for IGCSE & O level - Algorithm Design And Problem Solving (Section 11 - No. 32)
What is the role of a presence check in data validation?
To ensure data is entered into a field.
To verify the data type is correct.
To match the data with a stored value.
To set the length of the input.
Paskaidrojums
Presence checks verify if a required field has been populated.