Computer Data Integrity and Normalization Test Online

Q: How can I prepare for Computer Data Integrity and Normalization Test Online?

You can prepare for Computer Data Integrity and Normalization Test Online by attempting the free online quizzes at Gotest.com.pk. We provide instant results, performance reports, and detailed explanations for every question.

Question 1

1. Which of the following is a domain integrity rule?

Answer

Values must exist in another table

Answer

Values must be non-null

Answer

Values must follow a specific data type and range

Answer

Values must be unique

Question 2

2. Which normal form eliminates multi-valued dependencies?

Question 3

3. Which of the following anomalies occurs when updating one record requires updating multiple rows?

Answer

Insert anomaly

Answer

Access anomaly

Answer

Delete anomaly

Answer

Update anomaly

Question 4

4. Which normal form helps in eliminating join dependency?

Question 5

5. Which is an advantage of denormalization?

Answer

Improved query performance

Answer

Increased redundancy

Answer

Reduced data consistency

Answer

Slower insert operations

Question 6

6. What does entity integrity ensure?

Answer

Valid ranges for data

Answer

Consistent foreign keys

Answer

No two rows are identical

Answer

No NULL in a primary key

Question 7

7. Which of these can be violated if foreign keys are not properly maintained?

Answer

Entity integrity

Answer

Referential integrity

Answer

Structural integrity

Answer

Domain integrity

Question 8

8. Which of the following would result from a lack of data integrity?

Answer

Duplicate or conflicting data

Answer

Consistent reports

Answer

Accurate forecasting

Answer

Fast performance

Question 9

9. Which is a disadvantage of normalization?

Answer

Slower queries due to joins

Answer

Reduced data consistency

Answer

Poor data integrity

Answer

Increased redundancy

Question 10

10. Which SQL keyword can help maintain entity integrity?

Answer

PRIMARY KEY

Answer

FOREIGN KEY

Question 11

11. Which normal form eliminates partial dependency?

Question 12

12. Which of the following is not an integrity rule in databases?

Answer

Entity integrity

Answer

Relational integrity

Answer

Domain integrity

Answer

Referential integrity

Question 13

13. What is the main cause of data anomalies?

Answer

Data redundancy

Answer

Foreign keys

Answer

Normalization

Question 14

14. Which of the following ensures the accuracy and consistency of data over its lifecycle?

Answer

Data replication

Answer

Data redundancy

Answer

Data backup

Answer

Data integrity

Question 15

15. Which of these is an example of denormalization?

Answer

Eliminating transitive dependencies

Answer

Removing all keys

Answer

Applying 3NF

Answer

Adding redundant data to improve performance

Question 16

16. Which of the following is true for 1NF?

Answer

It removes join dependencies

Answer

It allows multi-valued attributes

Answer

It removes transitive dependencies

Answer

It ensures atomic values in each cell

Question 17

17. What is the purpose of normalization in databases?

Answer

To create duplicate data

Answer

To speed up data entry

Answer

To reduce complexity

Answer

To eliminate data redundancy and anomalies

Question 18

18. Which of the following is used to ensure unique values in a column?

Question 19

19. What type of dependency is A → B, B → C implies A → C?

Answer

Functional dependency

Answer

Partial dependency

Answer

Join dependency

Answer

Transitive dependency

Question 20

20. What does the NOT NULL constraint do?

Answer

Prevents foreign key violations

Answer

Prevents duplicates

Answer

Deletes null values

Answer

Ensures that a column cannot have NULL values

Question 21

21. Which of the following is a higher normal form beyond 3NF?

Question 22

22. Which of these forms ensures that every determinant is a candidate key?

Question 23

23. What is a candidate key?

Answer

A possible choice for primary key

Answer

A duplicate column

Answer

A key chosen randomly

Answer

A foreign key

Question 24

24. Which of these is true about normalization?

Answer

It improves data integrity

Answer

It decreases consistency

Answer

It increases redundancy

Answer

It ensures unstructured data

Question 25

25. Which of the following helps enforce domain integrity?

Question 26

26. Which constraint enforces referential integrity?

Answer

FOREIGN KEY

Question 27

27. What is a delete anomaly?

Answer

Duplicate data being deleted

Answer

Unintended loss of data due to deletion

Answer

Data that cannot be updated

Answer

Data that is accidentally inserted

Question 28

28. Which of the following is a type of data anomaly?

Answer

Insert anomaly

Answer

Join anomaly

Answer

Query anomaly

Answer

Format anomaly

Question 29

29. Which form of normalization removes repeating groups?

Question 30

30. In which normal form is a relation if it is free from transitive and partial dependencies?

Question 31

31. Which of the following constraints ensures that no two rows have the same value in a column?

Answer

FOREIGN KEY

Question 32

32. Normalization is mainly used to:

Answer

Increase speed of reports

Answer

Increase data visualization

Answer

Minimize duplication and ensure logical storage

Answer

Replace indexes

Question 33

33. What is data redundancy?

Answer

Efficient data storage

Answer

Repetition of data unnecessarily

Answer

Secure data access

Answer

Structured data retrieval

Question 34

34. Which of the following is used to define rules for valid values in a column?

Answer

FOREIGN KEY

Question 35

35. What is a transitive dependency?

Answer

When a non-key attribute depends on another non-key attribute

Answer

When a field is independent of the key

Answer

When all fields depend on each other

Answer

When a field is dependent on two fields

Question 36

36. Which term refers to consistency between related tables?

Answer

Referential integrity

Answer

Redundancy

Answer

Domain integrity

Answer

Entity integrity

Question 37

37. A relation is in 2NF if it is in 1NF and:

Answer

It has no partial dependencies

Answer

All attributes are text

Answer

It has no composite keys

Answer

It has a foreign key

Question 38

38. What does a foreign key constraint prevent?

Answer

Inserting a value that does not exist in the referenced table

Answer

Entering null in any field

Answer

Duplicating the primary key

Answer

Writing complex queries

Question 39

39. Which of the following is a partial dependency?

Answer

A non-prime attribute depends on part of a composite key

Answer

A field depends on itself

Answer

A primary key depends on a foreign key

Answer

A table with no primary key

Question 40

40. Which of the following is a form of integrity constraint?

Question 41

41. What is a composite key?

Answer

A duplicated primary key

Answer

A key made up of multiple columns

Answer

A foreign key

Answer

A single attribute key

Question 42

42. Which normal form is based on the concept of functional dependency?

Answer

All of the above

Question 43

43. What is a prime attribute?

Answer

A duplicate attribute

Answer

An attribute that is part of a candidate key

Answer

A secondary column

Answer

An attribute that is always NULL

Question 44

44. Which of these terms refers to meaningful grouping of data in a database?

Answer

Redundancy

Question 45

45. Which of the following is not a feature of a normalized database?

Answer

Fewer anomalies

Answer

Faster queries in all cases

Answer

Better data consistency

Answer

Less redundancy

Question 46

46. Which normal form removes transitive dependencies?

Question 47

47. Which of the following is not a benefit of normalization?

Answer

Improves data integrity

Answer

Simplifies maintenance

Answer

Increases storage usage

Answer

Reduces data redundancy

Question 48

48. Which of these attributes is derived?

Answer

Age (calculated from DOB)

Answer

Student ID

Question 49

49. What is a normal form in database design?

Answer

A set of rules to reduce redundancy and anomalies

Answer

A report format

Answer

A type of table

Answer

A database model

Question 50

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Total Questions:	50
Time Allowed:	25 Minutes
Total Marks:	50
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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