Computer Basic Concepts and Terminology of Databases Test Online

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Question 1

1. What is data redundancy?

Answer

Encrypting data

Answer

Losing data

Answer

Compressing data

Answer

Repeating the same data unnecessarily

Question 2

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

Question 3

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

Question 4

4. What is a view in SQL?

Answer

A stored procedure

Answer

A primary key

Answer

A physical table

Answer

A virtual table created from a SELECT query

Question 5

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

Answer

CREATE DATABASE

Answer

BUILD DATABASE

Answer

NEW DATABASE

Answer

MAKE DATABASE

Question 6

6. What is a database index used for?

Answer

Encrypting data

Answer

Storing records

Answer

Backing up data

Answer

Increasing search speed

Question 7

7. Which one is not an SQL data type?

Question 8

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

Question 9

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

Question 10

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

Question 11

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

Answer

DELETE removes records one by one, TRUNCATE removes all instantly

Answer

TRUNCATE allows WHERE clause

Answer

DELETE removes structure, TRUNCATE removes records

Answer

DELETE is faster

Question 12

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

Answer

A data entry form

Answer

A structure of tables and relationships

Answer

A backup of data

Answer

A report format

Question 13

13. What is a record in a database?

Answer

A row representing one entry

Answer

A table of values

Answer

A file format

Answer

A column of data

Question 14

14. What does SQL stand for?

Answer

Simplified Query Language

Answer

Structured Query Language

Answer

Structured Quick Language

Answer

Server Query Language

Question 15

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

Question 16

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

Answer

Adobe Reader

Answer

Microsoft Excel

Question 17

17. What does DBMS stand for?

Answer

Database Management System

Answer

Data Backup Management System

Answer

Database Managing Software

Answer

Data Business Modeling Software

Question 18

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

Question 19

19. What is a foreign key?

Answer

A field that stores user passwords

Answer

A key used in multiple databases

Answer

A duplicate of a primary key

Answer

A field that links one table to another

Question 20

20. What is the full form of RDBMS?

Answer

Relational Database Management System

Answer

Registered Data-Based Model Software

Answer

Random Data Management Software

Answer

Real Data Backup and Management System

Question 21

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

Question 22

22. What is a primary key?

Answer

A duplicated field

Answer

A field used only for sorting

Answer

A field that allows null values

Answer

A field that uniquely identifies a record

Question 23

23. Which of the following is a NoSQL database?

Answer

PostgreSQL

Question 24

24. Which of these is a relational database?

Question 25

25. What is the default sort order in SQL?

Answer

Descending

Answer

Alphabetical

Question 26

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

Question 27

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

Question 28

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

Answer

Constraint

Question 29

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

Answer

Spreadsheet

Answer

Hierarchical

Answer

Relational

Question 30

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

Answer

Secondary key

Answer

Composite key

Answer

Foreign key

Answer

Primary key

Question 31

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

Question 32

32. What does ERD stand for?

Answer

Entity Relationship Diagram

Answer

Extended Relational Data

Answer

Entry Record Document

Answer

Entity Relational Design

Question 33

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

Answer

MAKE TABLE

Answer

CREATE TABLE

Answer

BUILD TABLE

Question 34

34. What is the result of a JOIN operation?

Answer

Combining rows from multiple tables based on a related column

Answer

Insertion of a row

Answer

Encrypting values

Answer

Deletion of a record

Question 35

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

Answer

Spreadsheet

Answer

Operating system

Question 36

36. What is an attribute in a database?

Answer

A set of tables

Answer

A unique row

Answer

A data field or column

Answer

A duplicate record

Question 37

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

Question 38

38. What is a composite key?

Answer

A key made of multiple columns

Answer

A duplicated primary key

Answer

A foreign key

Answer

A single key used across tables

Question 39

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

Question 40

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

Question 41

41. What is a field in a database?

Answer

A group of records

Answer

A single piece of data in a record

Answer

A collection of tables

Answer

A data file

Question 42

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

Question 43

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

Question 44

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

Question 45

45. What does NULL represent in a database?

Answer

A missing or unknown value

Answer

A false value

Answer

A zero value

Answer

An empty space

Question 46

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

Question 47

47. Which is the correct order of SQL execution?

Answer

FROM → WHERE → SELECT

Answer

FROM → SELECT → WHERE

Answer

SELECT → WHERE → FROM

Answer

SELECT → FROM → WHERE

Question 48

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

Question 49

49. What is the purpose of normalization?

Answer

To slow down database queries

Answer

To convert data to audio format

Answer

To duplicate data

Answer

To reduce redundancy and improve data integrity

Question 50

50. What is data integrity in databases?

Answer

Encrypting the data

Answer

Sorting tables

Answer

Combining data

Answer

Ensuring data remains accurate and consistent

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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