Computer Science - Class 12
Solutions to CBSE Sample Paper - Computer Science Class 12

Which of the following statements is FALSE about alternate keys in a relational database? 

  1. An alternate key is a candidate key that is not a primary key. 

  2. An alternate key can uniquely identify a tuple in a relation. 

  3. An alternate key can contain null values. 

  4. An alternate key can be a composite key.


Answer by student

c. An alternate key can contain null values.

Detailed answer by teachoo

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.