Understanding Input Validation Techniques

What is the primary purpose of input validation?

• To reduce the number of fields in a form

• To ensure data meets specific criteria before processing

• To increase the speed of data entry

• To enhance the visual appeal of a form

Which type of validation check would you use to ensure a user enters a whole number for their age?

• Length check

• Format check

• Presence check

• Type check

What does a range check validate?

• If the input is within a specified range

• If the input is a string

• If the input is not empty

• If the input follows a specific format

Which validation check ensures that mandatory fields are not left blank?

• Type check

• Presence check

• Format check

• Range check

What is a check digit used for?

• To verify the length of a code

• To ensure a code follows a specific format

• To calculate a digit based on preceding digits for verification

• To check if a field is mandatory