Computer Database Design Process Test Online

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Question 1

1. Which is used to uniquely identify a weak entity?

Answer

Surrogate key

Answer

Unique key

Answer

Partial key

Answer

Primary key

Question 2

2. What is a weak entity?

Answer

A temporary table

Answer

An entity that depends on another for identification

Answer

An entity that doesn't store data

Answer

A deleted record

Question 3

3. What is a functional dependency?

Answer

When data is split into parts

Answer

When one attribute determines another

Answer

When two tables are unrelated

Answer

When all attributes are primary keys

Question 4

4. Which design step involves mapping entities to tables?

Answer

Front-end design

Answer

Requirements gathering

Answer

Logical design

Answer

Physical design

Question 5

5. Which diagram is typically used during the conceptual design phase?

Answer

Venn diagram

Answer

Gantt chart

Answer

ERD (Entity Relationship Diagram)

Question 6

6. Which of the following is a key advantage of normalization?

Answer

Better data integrity

Answer

Increased redundancy

Answer

Slower performance

Answer

Complicated queries

Question 7

7. What is denormalization?

Answer

Converting forms to HTML

Answer

Repeating data intentionally for performance

Answer

Creating more relationships

Answer

Reducing primary keys

Question 8

8. What is a many-to-many relationship?

Answer

One record relates to multiple, and vice versa

Answer

Data is encrypted

Answer

One record relates to one only

Answer

All records are duplicates

Question 9

9. What does cardinality refer to in database design?

Answer

The number of attributes

Answer

The number of columns

Answer

The number of entities in a relationship

Answer

The size of the database

Question 10

10. Which one is not a rule of normalization?

Answer

Keep all foreign keys as primary

Answer

Eliminate transitive dependencies

Answer

Remove repeating groups

Answer

Eliminate duplicate columns

Question 11

11. What is a candidate key?

Answer

One of the possible choices for primary key

Answer

A duplicate key

Answer

A key used only for foreign relationships

Answer

A key that can never be used

Question 12

12. Which term refers to all possible values an attribute can take?

Answer

Relationship

Question 13

13. What is the goal of normalization in database design?

Answer

To increase redundancy

Answer

To reduce database size

Answer

To create views

Answer

To eliminate data duplication

Question 14

14. Which of the following best defines a surrogate key?

Answer

An alternate candidate key

Answer

A user-chosen key

Answer

A composite key

Answer

A system-generated unique key

Question 15

15. Which of the following design issues should be avoided in a good database?

Answer

Well-structured tables

Answer

High redundancy

Answer

Clear primary keys

Answer

Proper indexing

Question 16

16. Which of the following represents a multi-valued attribute in an ERD?

Answer

Double oval

Answer

Dashed line

Question 17

17. In database design, what is an entity?

Answer

A database administrator

Answer

A storage device

Answer

A real-world object or concept

Answer

A SQL query

Question 18

18. In which phase is data volume estimation considered?

Answer

Conceptual

Answer

Implementation

Question 19

19. Which of the following can lead to update anomalies?

Answer

Normalized data

Answer

Foreign key constraints

Answer

Proper indexing

Answer

Redundant data

Question 20

20. What is the purpose of conceptual design in databases?

Answer

To write SQL queries

Answer

To create reports

Answer

To sort the records

Answer

To design the high-level structure of the database

Question 21

21. Which of the following terms means "an attribute that uniquely identifies an entity"?

Answer

Foreign key

Answer

Primary key

Question 22

22. Which of the following is a 1NF (First Normal Form) rule?

Answer

Remove all repeating groups

Answer

Remove transitive dependencies

Answer

Use only primary keys

Answer

Eliminate foreign keys

Question 23

23. Which step comes after logical design?

Answer

Report generation

Answer

Requirements gathering

Answer

Physical design

Answer

Conceptual design

Question 24

24. What does the logical design phase involve?

Answer

Converting ER diagrams into tables

Answer

Creating user interfaces

Answer

Formatting text

Answer

Physical data storage

Question 25

25. In a one-to-many relationship, where is the foreign key placed?

Answer

In the parent table

Answer

In the child table

Answer

In neither table

Answer

In both tables

Question 26

26. What is a composite attribute?

Answer

An attribute with a default value

Answer

An attribute that links multiple databases

Answer

An attribute made of multiple sub-parts

Answer

An attribute that stores numbers only

Question 27

27. Which design phase involves choosing data types for each attribute?

Answer

Conceptual

Question 28

28. Which type of database model uses hierarchical relationships?

Answer

Object-oriented model

Answer

Hierarchical model

Answer

Relational model

Answer

Network model

Question 29

29. Which type of relationship does not require a foreign key?

Answer

Many-to-one

Answer

One-to-many

Question 30

30. Which of the following is not a benefit of good database design?

Answer

Higher storage cost due to duplication

Answer

Reduced anomalies

Answer

Faster access

Answer

Data consistency

Question 31

31. Which of the following is the first step in the database design process?

Answer

Creating tables

Answer

Requirements analysis

Answer

Normalization

Question 32

32. Which of the following represents a relationship between two entities?

Answer

Foreign key

Question 33

33. Which of the following ensures uniqueness of each record in a table?

Answer

Primary key

Answer

Composite key

Answer

Foreign key

Question 34

34. What is the main purpose of indexing in physical design?

Answer

Reduce memory

Answer

Improve query performance

Answer

Backup data

Answer

Delete duplicates

Question 35

35. Which of the following converts the ER model into relational form?

Answer

Conceptual modeling

Answer

Data mining

Answer

Logical design

Answer

Database normalization

Question 36

36. Which of the following terms describes the process of defining access controls?

Answer

Query optimization

Answer

Data modeling

Answer

Normalization

Answer

Authorization

Question 37

37. Which relationship degree involves three entities?

Question 38

38. Which phase involves testing the database design with sample data?

Answer

Prototyping

Answer

Conceptual design

Answer

Physical implementation

Answer

Logical design

Question 39

39. In ER diagrams, what symbol represents an entity?

Question 40

40. What is the final outcome of the database design process?

Answer

A fully working database system

Answer

A software application

Answer

A logical schema

Answer

A conceptual model

Question 41

41. Which of the following is used to eliminate transitive dependency in normalization?

Answer

First Normal Form

Answer

Third Normal Form

Answer

Second Normal Form

Answer

Fourth Normal Form

Question 42

42. Which key can contain extra attributes but still uniquely identifies a record?

Answer

Candidate key

Answer

Foreign key

Answer

Alternate key

Question 43

43. What is a derived attribute?

Answer

A primary key

Answer

An attribute copied from another table

Answer

A non-existing attribute

Answer

An attribute dependent on calculation

Question 44

44. In ER diagrams, what do diamonds represent?

Answer

Relationships

Answer

Attributes

Question 45

45. What is included in the physical design phase?

Answer

User permission settings

Answer

Writing procedures

Answer

Hardware specifications and indexing

Answer

Table creation only

Question 46

46. Which of the following is a strong entity?

Answer

A derived attribute

Answer

An entity that exists independently

Answer

An entity without a primary key

Answer

An entity without attributes

Question 47

47. Which of the following is not a database design activity?

Answer

Normalization

Answer

UI/UX design

Answer

Conceptual modeling

Answer

Schema creation

Question 48

48. Which tool is commonly used in database design to model relationships?

Answer

PowerPoint

Answer

ER Diagram

Question 49

49. What does data integrity ensure?

Answer

Accuracy and consistency of data

Answer

Hardware compatibility

Answer

System speed

Answer

Data backup

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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Important Database Design Process Question and Answer

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