Data Validation Quiz

What is the primary purpose of data validation in a database?

• To ensure only correct and meaningful data is entered

• To make data entry faster

• To prevent users from making any changes to the database

• To automatically fix errors in the data

Why is an error message displayed when a validation rule is violated?

• To prevent users from entering data again

• To allow users to correct mistakes

• To delete the incorrect record

• To notify the database administrator

Which validation rule ensures that no field is left empty?

• Type check

• Presence check

• Format check

• Length check

A length check ensures that:

• Data fits within a specified range of values

• Data is entered in a correct pattern

• Data contains the required number of characters

• Data is unique

Which validation rule ensures that a field contains data within a set limit, such as numbers between 1 and 100?

• Length check

• Presence check

• Range check

• Type check

A format check ensures that:

• A number is not less than zero

• Data follows a specific structure or pattern

• The field is not left blank

• Only numbers are entered

A type check is useful when:

• Verifying that only numbers are entered in a price field

• Checking if a password includes special characters

• Ensuring that a phone number is in a valid format

• Ensuring a name field contains at least five letters

What happens when a validation rule is broken during data entry?

• The data is stored but marked as incorrect

• An error message is displayed

• The incorrect data is deleted automatically

• The data is corrected automatically

Which validation rule would be used to prevent a student from entering an age of 200?

• Presence check

• Range check

• Format check

• Length check

If a field is required to contain only numbers, which validation rule should be used?

• Presence check

• Type check

• Format check

• Range check