Computer Science for IGCSE & O level - Algorithm Design And Problem Solving (Section 8 - No. 5)
What is the primary purpose of a presence check?
To ensure that data is in the correct format.
To verify that a user has entered data into a required field.
To validate the data type of the input.
To compare two entries to ensure consistency.
Explicación
A presence check confirms data has been entered for a required field, ensuring the field isn't left blank.