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WAEC Data Processing 2020 Question 22

Question 22

Database Management

A database contains list of customers and their phone numbers. What type of relationship describes a customer having multiple phone numbers?

  1. A.Many-to-many.
  2. B.Many-to-one.
  3. C.One-to-many.
  4. D.One-to-one.
Show the answer and explanation

Answer: C (One-to-many.)

Explanation

One customer is linked to many phone numbers: a one-to-many relationship.