In Your Database Course, Your Instructor Has Given You a Small

In your database course, your instructor has given you a small database that has a lot of invalid data, issuing the challenge to you that you work to apply validation rules to the data and determine what checks need to be applied in order to restore integrity to the data.
The instructor tells you that this is a mailing database, and yet you can see at a glance that there are some records with no data in the city field. What kind of check should you run on this field?

A) completeness check
B) range check
C) consistency check
D) check digit

Correct Answer:

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