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Himachal Pradesh Computer - Practice Mock Test Set 31

1. Which scenario best demonstrates a violation of the primary key constraint in a relational database?

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A. Allowing NULL values in non-key columns B. Having multiple candidate keys in a table C. Using multiple foreign keys in a table D. Inserting two rows with the same value in the primary key column

2. Which scenario best demonstrates a violation of the primary key constraint in a relational database?

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A. Allowing NULL values in non-key columns B. Having multiple candidate keys in a table C. Using multiple foreign keys in a table D. Inserting two rows with the same value in the primary key column

3. Which scenario best demonstrates a violation of the primary key constraint in a relational database?

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A. Allowing NULL values in non-key columns B. Having multiple candidate keys in a table C. Using multiple foreign keys in a table D. Inserting two rows with the same value in the primary key column

4. Which scenario best demonstrates a violation of the primary key constraint in a relational database?

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A. Allowing NULL values in non-key columns B. Having multiple candidate keys in a table C. Using multiple foreign keys in a table D. Inserting two rows with the same value in the primary key column

5. In a database system, a student's age field is restricted to accept only numeric values within a specific range. Any alphabetical or negative input is rejected during data entry. This restriction ensures that only valid values are stored in the database column. This restriction defines:

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A. Domain B. Entity C. Tuple D. Schema

6. In a database system, a student's age field is restricted to accept only numeric values within a specific range. Any alphabetical or negative input is rejected during data entry. This restriction ensures that only valid values are stored in the database column. This restriction defines:

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A. Domain B. Entity C. Tuple D. Schema

7. In a database system, a student's age field is restricted to accept only numeric values within a specific range. Any alphabetical or negative input is rejected during data entry. This restriction ensures that only valid values are stored in the database column. This restriction defines:

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A. Domain B. Entity C. Tuple D. Schema

8. In a database system, a student's age field is restricted to accept only numeric values within a specific range. Any alphabetical or negative input is rejected during data entry. This restriction ensures that only valid values are stored in the database column. This restriction defines:

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A. Domain B. Entity C. Tuple D. Schema

9. In a database system, a student's age field is restricted to accept only numeric values within a specific range. Any alphabetical or negative input is rejected during data entry. This restriction ensures that only valid values are stored in the database column. This restriction defines:

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A. Domain B. Entity C. Tuple D. Schema

10. In a database system, a student's age field is restricted to accept only numeric values within a specific range. Any alphabetical or negative input is rejected during data entry. This restriction ensures that only valid values are stored in the database column. This restriction defines:

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A. Domain B. Entity C. Tuple D. Schema

11. In a database system, a student's age field is restricted to accept only numeric values within a specific range. Any alphabetical or negative input is rejected during data entry. This restriction ensures that only valid values are stored in the database column. This restriction defines:

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A. Domain B. Entity C. Tuple D. Schema

12. In a database system, a student's age field is restricted to accept only numeric values within a specific range. Any alphabetical or negative input is rejected during data entry. This restriction ensures that only valid values are stored in the database column. This restriction defines:

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A. Domain B. Entity C. Tuple D. Schema

13. A company wants to generate a list of unique departments from their employee database, but some department names are repeated. Which SQL query will ensure only unique department names are displayed?

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A. SELECT DISTINCT department FROM employees; B. SELECT department, COUNT(*) FROM employees; C. SELECT department FROM employees; D. SELECT UNIQUE department FROM employees;

14. A company wants to generate a list of unique departments from their employee database, but some department names are repeated. Which SQL query will ensure only unique department names are displayed?

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A. SELECT DISTINCT department FROM employees; B. SELECT department, COUNT(*) FROM employees; C. SELECT department FROM employees; D. SELECT UNIQUE department FROM employees;

15. A company wants to generate a list of unique departments from their employee database, but some department names are repeated. Which SQL query will ensure only unique department names are displayed?

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A. SELECT DISTINCT department FROM employees; B. SELECT department, COUNT(*) FROM employees; C. SELECT department FROM employees; D. SELECT UNIQUE department FROM employees;

16. A company wants to generate a list of unique departments from their employee database, but some department names are repeated. Which SQL query will ensure only unique department names are displayed?

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A. SELECT DISTINCT department FROM employees; B. SELECT department, COUNT(*) FROM employees; C. SELECT department FROM employees; D. SELECT UNIQUE department FROM employees;

17. A company wants to generate a list of unique departments from their employee database, but some department names are repeated. Which SQL query will ensure only unique department names are displayed?

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A. SELECT DISTINCT department FROM employees; B. SELECT department, COUNT(*) FROM employees; C. SELECT department FROM employees; D. SELECT UNIQUE department FROM employees;

18. A company wants to generate a list of unique departments from their employee database, but some department names are repeated. Which SQL query will ensure only unique department names are displayed?

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A. SELECT DISTINCT department FROM employees; B. SELECT department, COUNT(*) FROM employees; C. SELECT department FROM employees; D. SELECT UNIQUE department FROM employees;

19. A company wants to generate a list of unique departments from their employee database, but some department names are repeated. Which SQL query will ensure only unique department names are displayed?

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A. SELECT DISTINCT department FROM employees; B. SELECT department, COUNT(*) FROM employees; C. SELECT department FROM employees; D. SELECT UNIQUE department FROM employees;

20. A company wants to generate a list of unique departments from their employee database, but some department names are repeated. Which SQL query will ensure only unique department names are displayed?

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A. SELECT DISTINCT department FROM employees; B. SELECT department, COUNT(*) FROM employees; C. SELECT department FROM employees; D. SELECT UNIQUE department FROM employees;

21. How does MySQL enforce the integrity of relationships between tables when records are inserted or deleted?

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A. Permitting unrestricted deletions B. Using only indexing methods C. Applying foreign key constraints D. Allowing automatic record insertion

22. How does MySQL enforce the integrity of relationships between tables when records are inserted or deleted?

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A. Permitting unrestricted deletions B. Using only indexing methods C. Applying foreign key constraints D. Allowing automatic record insertion

23. How does MySQL enforce the integrity of relationships between tables when records are inserted or deleted?

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A. Permitting unrestricted deletions B. Using only indexing methods C. Applying foreign key constraints D. Allowing automatic record insertion

24. How does MySQL enforce the integrity of relationships between tables when records are inserted or deleted?

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A. Permitting unrestricted deletions B. Using only indexing methods C. Applying foreign key constraints D. Allowing automatic record insertion

25. How does MySQL enforce the integrity of relationships between tables when records are inserted or deleted?

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A. Permitting unrestricted deletions B. Using only indexing methods C. Applying foreign key constraints D. Allowing automatic record insertion

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