CBSE Class 12 Computer Science — Database Concepts

All previous year questions from Chapter: Database Concepts

2 questions found

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2026(2 questions)

12
A table has two candidate keys, one of which is chosen as the primary key. How many alternate keys does this table have ?
1 mark· A· Candidate, Primary & Alternate Keys
15
A relation in MySQL database consists of 2 tuples and 3 attributes. If 2 attributes are deleted and 4 tuples are added, what will be the cardinality of the relation ?
1 mark· A· Degree and Cardinality of a Relation