Computer Basic Concepts and Terminology of Databases Test Online

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Question 1

1. What is a foreign key?

Answer

A key used in multiple databases

Answer

A field that stores user passwords

Answer

A field that links one table to another

Answer

A duplicate of a primary key

Question 2

2. What does NULL represent in a database?

Answer

A false value

Answer

An empty space

Answer

A zero value

Answer

A missing or unknown value

Question 3

3. Which command is used to modify the structure of a table?

Question 4

4. Which function returns the number of rows in a table?

Question 5

5. Which command is used to retrieve data from a database?

Question 6

6. Which operator is used in SQL for pattern matching?

Question 7

7. What is a database index used for?

Answer

Increasing search speed

Answer

Backing up data

Answer

Storing records

Answer

Encrypting data

Question 8

8. What is the full form of RDBMS?

Answer

Real Data Backup and Management System

Answer

Relational Database Management System

Answer

Random Data Management Software

Answer

Registered Data-Based Model Software

Question 9

9. Which clause is used to filter records in SQL?

Question 10

10. What does DBMS stand for?

Answer

Database Managing Software

Answer

Data Backup Management System

Answer

Database Management System

Answer

Data Business Modeling Software

Question 11

11. What is a record in a database?

Answer

A file format

Answer

A column of data

Answer

A table of values

Answer

A row representing one entry

Question 12

12. Which SQL keyword is used to sort the result set?

Question 13

13. Which SQL statement is used to create a new database?

Answer

NEW DATABASE

Answer

BUILD DATABASE

Answer

MAKE DATABASE

Answer

CREATE DATABASE

Question 14

14. Which SQL clause groups rows with the same values?

Question 15

15. Which command is used to grant user permissions in SQL?

Question 16

16. What is a field in a database?

Answer

A collection of tables

Answer

A group of records

Answer

A single piece of data in a record

Answer

A data file

Question 17

17. What is data integrity in databases?

Answer

Combining data

Answer

Ensuring data remains accurate and consistent

Answer

Sorting tables

Answer

Encrypting the data

Question 18

18. Which clause is used with GROUP BY to filter groups?

Question 19

19. Which SQL command is used to change existing records?

Question 20

20. Which command is used to remove records from a table?

Question 21

21. Which is the correct order of SQL execution?

Answer

SELECT → WHERE → FROM

Answer

SELECT → FROM → WHERE

Answer

FROM → SELECT → WHERE

Answer

FROM → WHERE → SELECT

Question 22

22. What is a primary key?

Answer

A field that allows null values

Answer

A field that uniquely identifies a record

Answer

A field used only for sorting

Answer

A duplicated field

Question 23

23. Which of these is a relational database?

Question 24

24. Which SQL clause is used to rename a column or table?

Question 25

25. Which one is not an SQL data type?

Question 26

26. What is the difference between DELETE and TRUNCATE in SQL?

Answer

DELETE removes records one by one, TRUNCATE removes all instantly

Answer

DELETE removes structure, TRUNCATE removes records

Answer

DELETE is faster

Answer

TRUNCATE allows WHERE clause

Question 27

27. What does the term schema refer to in databases?

Answer

A backup of data

Answer

A report format

Answer

A data entry form

Answer

A structure of tables and relationships

Question 28

28. Which of the following is not a type of DBMS?

Answer

Spreadsheet

Answer

Relational

Answer

Hierarchical

Question 29

29. What is a composite key?

Answer

A duplicated primary key

Answer

A single key used across tables

Answer

A key made of multiple columns

Answer

A foreign key

Question 30

30. What is the default sort order in SQL?

Answer

Descending

Answer

Alphabetical

Question 31

31. Which keyword is used to define a new table in SQL?

Answer

CREATE TABLE

Answer

MAKE TABLE

Answer

BUILD TABLE

Question 32

32. Which of the following is a popular database management system (DBMS)?

Answer

Microsoft Excel

Answer

Adobe Reader

Question 33

33. Which SQL command is used to remove a table completely?

Question 34

34. Which SQL statement is used to add new records?

Question 35

35. Which constraint ensures that a column cannot have NULL values?

Question 36

36. Which SQL keyword is used to combine results from two queries?

Question 37

37. What is an attribute in a database?

Answer

A duplicate record

Answer

A unique row

Answer

A data field or column

Answer

A set of tables

Question 38

38. What is the result of a JOIN operation?

Answer

Encrypting values

Answer

Insertion of a row

Answer

Deletion of a record

Answer

Combining rows from multiple tables based on a related column

Question 39

39. What is the purpose of normalization?

Answer

To duplicate data

Answer

To reduce redundancy and improve data integrity

Answer

To convert data to audio format

Answer

To slow down database queries

Question 40

40. What does ERD stand for?

Answer

Entity Relational Design

Answer

Entry Record Document

Answer

Extended Relational Data

Answer

Entity Relationship Diagram

Question 41

41. Which of the following defines rules for data in a table?

Answer

Constraint

Question 42

42. Which of the following is used to store and manage data in a structured format?

Answer

Operating system

Answer

Spreadsheet

Question 43

43. Which of the following is a NoSQL database?

Answer

PostgreSQL

Question 44

44. In relational databases, a table is also called a:

Question 45

45. What is data redundancy?

Answer

Compressing data

Answer

Losing data

Answer

Encrypting data

Answer

Repeating the same data unnecessarily

Question 46

46. Which SQL clause is used to limit the number of records returned?

Question 47

47. What is a view in SQL?

Answer

A virtual table created from a SELECT query

Answer

A physical table

Answer

A stored procedure

Answer

A primary key

Question 48

48. Which key ensures uniqueness for each record in a table?

Answer

Primary key

Answer

Foreign key

Answer

Secondary key

Answer

Composite key

Question 49

49. Which SQL command is used to remove duplicate rows from results?

Question 50

50. What does SQL stand for?

Answer

Structured Query Language

Answer

Structured Quick Language

Answer

Server Query Language

Answer

Simplified Query Language

Question 51

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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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