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Questions and Answers
What is the purpose of keys in DBMS?
What is the purpose of keys in DBMS?
- To create relationships between tables
- To perform complex calculations
- To uniquely identify a row of data in a table (correct)
- To organize data in tables
Which type of key uniquely identifies a row in a table?
Which type of key uniquely identifies a row in a table?
- Super key
- Composite key
- Alternate key
- Candidate key (correct)
Which key type can be a combination of two or more columns to uniquely identify a row?
Which key type can be a combination of two or more columns to uniquely identify a row?
- Composite key (correct)
- Compound key
- Alternate key
- Super key
What is the main function of a foreign key in DBMS?
What is the main function of a foreign key in DBMS?
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In a real-world application with thousands of records, why are keys important in a DBMS system?
In a real-world application with thousands of records, why are keys important in a DBMS system?
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