Computer Science for IGCSE & O level - Algorithm Design And Problem Solving (Section 12 - No. 24)
Which data validation technique is employed to ensure that a user has provided an entry for a required field, such as an email address or a phone number?
Type Check
Presence Check
Format Check
Range Check
स्पष्टीकरण
Presence check is used to make certain a required field isn't empty.