Computer Basic Concepts and Terminology of Databases Test Online

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Question 1

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

Question 2

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

Question 3

3. What does ERD stand for?

Answer

Entry Record Document

Answer

Extended Relational Data

Answer

Entity Relational Design

Answer

Entity Relationship Diagram

Question 4

4. What does DBMS stand for?

Answer

Database Management System

Answer

Database Managing Software

Answer

Data Business Modeling Software

Answer

Data Backup Management System

Question 5

5. What does NULL represent in a database?

Answer

A missing or unknown value

Answer

An empty space

Answer

A zero value

Answer

A false value

Question 6

6. What is a record in a database?

Answer

A row representing one entry

Answer

A file format

Answer

A table of values

Answer

A column of data

Question 7

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

Question 8

8. What is a database index used for?

Answer

Backing up data

Answer

Encrypting data

Answer

Increasing search speed

Answer

Storing records

Question 9

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

Question 10

10. What is a view in SQL?

Answer

A primary key

Answer

A stored procedure

Answer

A physical table

Answer

A virtual table created from a SELECT query

Question 11

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

Answer

Composite key

Answer

Foreign key

Answer

Secondary key

Answer

Primary key

Question 12

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

Answer

A report format

Answer

A structure of tables and relationships

Answer

A backup of data

Answer

A data entry form

Question 13

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

Question 14

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

Question 15

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

Question 16

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

Answer

CREATE TABLE

Answer

BUILD TABLE

Answer

MAKE TABLE

Question 17

17. What does SQL stand for?

Answer

Server Query Language

Answer

Simplified Query Language

Answer

Structured Query Language

Answer

Structured Quick Language

Question 18

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

Answer

BUILD DATABASE

Answer

MAKE DATABASE

Answer

CREATE DATABASE

Answer

NEW DATABASE

Question 19

19. What is a composite key?

Answer

A foreign key

Answer

A key made of multiple columns

Answer

A duplicated primary key

Answer

A single key used across tables

Question 20

20. What is a foreign key?

Answer

A key used in multiple databases

Answer

A field that links one table to another

Answer

A duplicate of a primary key

Answer

A field that stores user passwords

Question 21

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

Answer

Operating system

Answer

Spreadsheet

Question 22

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

Answer

DELETE is faster

Answer

TRUNCATE allows WHERE clause

Answer

DELETE removes records one by one, TRUNCATE removes all instantly

Answer

DELETE removes structure, TRUNCATE removes records

Question 23

23. What is data integrity in databases?

Answer

Sorting tables

Answer

Ensuring data remains accurate and consistent

Answer

Encrypting the data

Answer

Combining data

Question 24

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

Question 25

25. Which of these is a relational database?

Question 26

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

Question 27

27. Which one is not an SQL data type?

Question 28

28. What is the default sort order in SQL?

Answer

Descending

Answer

Alphabetical

Question 29

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

Question 30

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

Answer

Constraint

Question 31

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

Question 32

32. What is an attribute in a database?

Answer

A unique row

Answer

A duplicate record

Answer

A set of tables

Answer

A data field or column

Question 33

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

Answer

Adobe Reader

Answer

Microsoft Excel

Question 34

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

Question 35

35. What is a primary key?

Answer

A field used only for sorting

Answer

A field that uniquely identifies a record

Answer

A duplicated field

Answer

A field that allows null values

Question 36

36. What is the purpose of normalization?

Answer

To reduce redundancy and improve data integrity

Answer

To duplicate data

Answer

To convert data to audio format

Answer

To slow down database queries

Question 37

37. Which is the correct order of SQL execution?

Answer

FROM → SELECT → WHERE

Answer

FROM → WHERE → SELECT

Answer

SELECT → WHERE → FROM

Answer

SELECT → FROM → WHERE

Question 38

38. Which of the following is a NoSQL database?

Answer

PostgreSQL

Question 39

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

Answer

Relational

Answer

Spreadsheet

Answer

Hierarchical

Question 40

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

Question 41

41. What is data redundancy?

Answer

Losing data

Answer

Encrypting data

Answer

Compressing data

Answer

Repeating the same data unnecessarily

Question 42

42. What is the result of a JOIN operation?

Answer

Insertion of a row

Answer

Encrypting values

Answer

Combining rows from multiple tables based on a related column

Answer

Deletion of a record

Question 43

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

Question 44

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

Question 45

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

Question 46

46. What is a field in a database?

Answer

A single piece of data in a record

Answer

A data file

Answer

A group of records

Answer

A collection of tables

Question 47

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

Question 48

48. What is the full form of RDBMS?

Answer

Random Data Management Software

Answer

Relational Database Management System

Answer

Registered Data-Based Model Software

Answer

Real Data Backup and Management System

Question 49

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

Question 50

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

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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