Computer Basic Concepts and Terminology of Databases Test Online

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Question 1

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

Answer

Operating system

Answer

Spreadsheet

Question 2

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

Question 3

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

Answer

A structure of tables and relationships

Answer

A data entry form

Answer

A backup of data

Answer

A report format

Question 4

4. Which of these is a relational database?

Question 5

5. Which is the correct order of SQL execution?

Answer

FROM → WHERE → SELECT

Answer

SELECT → FROM → WHERE

Answer

SELECT → WHERE → FROM

Answer

FROM → SELECT → WHERE

Question 6

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

Answer

Foreign key

Answer

Primary key

Answer

Secondary key

Answer

Composite key

Question 7

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

Question 8

8. What is the default sort order in SQL?

Answer

Alphabetical

Answer

Descending

Question 9

9. What is a view in SQL?

Answer

A physical table

Answer

A stored procedure

Answer

A primary key

Answer

A virtual table created from a SELECT query

Question 10

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

Question 11

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

Question 12

12. What is the result of a JOIN operation?

Answer

Deletion of a record

Answer

Combining rows from multiple tables based on a related column

Answer

Encrypting values

Answer

Insertion of a row

Question 13

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

Question 14

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

Question 15

15. What is a foreign key?

Answer

A duplicate of a primary key

Answer

A field that links one table to another

Answer

A key used in multiple databases

Answer

A field that stores user passwords

Question 16

16. Which one is not an SQL data type?

Question 17

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

Question 18

18. What is data redundancy?

Answer

Encrypting data

Answer

Losing data

Answer

Repeating the same data unnecessarily

Answer

Compressing data

Question 19

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

Answer

MAKE TABLE

Answer

CREATE TABLE

Answer

BUILD TABLE

Question 20

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

Question 21

21. What does ERD stand for?

Answer

Entity Relational Design

Answer

Entity Relationship Diagram

Answer

Extended Relational Data

Answer

Entry Record Document

Question 22

22. What is data integrity in databases?

Answer

Ensuring data remains accurate and consistent

Answer

Encrypting the data

Answer

Combining data

Answer

Sorting tables

Question 23

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

Question 24

24. What is an attribute in a database?

Answer

A duplicate record

Answer

A unique row

Answer

A set of tables

Answer

A data field or column

Question 25

25. What is a field in a database?

Answer

A collection of tables

Answer

A single piece of data in a record

Answer

A data file

Answer

A group of records

Question 26

26. What does NULL represent in a database?

Answer

A zero value

Answer

A missing or unknown value

Answer

An empty space

Answer

A false value

Question 27

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

Question 28

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

Question 29

29. Which of the following is a NoSQL database?

Answer

PostgreSQL

Question 30

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

Question 31

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

Question 32

32. What is the purpose of normalization?

Answer

To convert data to audio format

Answer

To reduce redundancy and improve data integrity

Answer

To duplicate data

Answer

To slow down database queries

Question 33

33. What is the full form of RDBMS?

Answer

Registered Data-Based Model Software

Answer

Real Data Backup and Management System

Answer

Relational Database Management System

Answer

Random Data Management Software

Question 34

34. What does DBMS stand for?

Answer

Data Backup Management System

Answer

Database Managing Software

Answer

Database Management System

Answer

Data Business Modeling Software

Question 35

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

Question 36

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

Question 37

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

Answer

Adobe Reader

Answer

Microsoft Excel

Question 38

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

Answer

TRUNCATE allows WHERE clause

Answer

DELETE is faster

Answer

DELETE removes structure, TRUNCATE removes records

Answer

DELETE removes records one by one, TRUNCATE removes all instantly

Question 39

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

Answer

MAKE DATABASE

Answer

CREATE DATABASE

Answer

BUILD DATABASE

Answer

NEW DATABASE

Question 40

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

Question 41

41. What is a database index used for?

Answer

Storing records

Answer

Backing up data

Answer

Encrypting data

Answer

Increasing search speed

Question 42

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

Question 43

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

Question 44

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

Answer

Hierarchical

Answer

Relational

Answer

Spreadsheet

Question 45

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

Question 46

46. What is a primary key?

Answer

A field that allows null values

Answer

A duplicated field

Answer

A field that uniquely identifies a record

Answer

A field used only for sorting

Question 47

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

Answer

Constraint

Question 48

48. What does SQL stand for?

Answer

Structured Query Language

Answer

Server Query Language

Answer

Simplified Query Language

Answer

Structured Quick Language

Question 49

49. What is a record in a database?

Answer

A column of data

Answer

A row representing one entry

Answer

A file format

Answer

A table of values

Question 50

50. What is a composite key?

Answer

A single key used across tables

Answer

A duplicated primary key

Answer

A foreign key

Answer

A key made of multiple columns

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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