Computer Basic Concepts and Terminology of Databases Test Online

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Question 1

1. What does ERD stand for?

Answer

Entity Relationship Diagram

Answer

Entity Relational Design

Answer

Entry Record Document

Answer

Extended Relational Data

Question 2

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

Answer

BUILD DATABASE

Answer

NEW DATABASE

Answer

MAKE DATABASE

Answer

CREATE DATABASE

Question 3

3. What is data integrity in databases?

Answer

Combining data

Answer

Ensuring data remains accurate and consistent

Answer

Sorting tables

Answer

Encrypting the data

Question 4

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

Question 5

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

Answer

BUILD TABLE

Answer

CREATE TABLE

Answer

MAKE TABLE

Question 6

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

Question 7

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

Question 8

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

Question 9

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

Answer

Secondary key

Answer

Composite key

Answer

Foreign key

Answer

Primary key

Question 10

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

Answer

A data entry form

Answer

A backup of data

Answer

A report format

Answer

A structure of tables and relationships

Question 11

11. Which is the correct order of SQL execution?

Answer

FROM → WHERE → SELECT

Answer

FROM → SELECT → WHERE

Answer

SELECT → FROM → WHERE

Answer

SELECT → WHERE → FROM

Question 12

12. 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 13

13. What is a database index used for?

Answer

Encrypting data

Answer

Increasing search speed

Answer

Storing records

Answer

Backing up data

Question 14

14. What does SQL stand for?

Answer

Structured Quick Language

Answer

Structured Query Language

Answer

Server Query Language

Answer

Simplified Query Language

Question 15

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

Question 16

16. What is the result of a JOIN operation?

Answer

Insertion of a row

Answer

Combining rows from multiple tables based on a related column

Answer

Deletion of a record

Answer

Encrypting values

Question 17

17. What does DBMS stand for?

Answer

Data Backup Management System

Answer

Database Managing Software

Answer

Database Management System

Answer

Data Business Modeling Software

Question 18

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

Question 19

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

Answer

Constraint

Question 20

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

Question 21

21. What is a composite key?

Answer

A foreign key

Answer

A key made of multiple columns

Answer

A single key used across tables

Answer

A duplicated primary key

Question 22

22. What is an attribute in a database?

Answer

A set of tables

Answer

A duplicate record

Answer

A data field or column

Answer

A unique row

Question 23

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

Question 24

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

Answer

TRUNCATE allows WHERE clause

Answer

DELETE removes records one by one, TRUNCATE removes all instantly

Answer

DELETE removes structure, TRUNCATE removes records

Answer

DELETE is faster

Question 25

25. 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 26

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

Question 27

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

Question 28

28. Which of these is a relational database?

Question 29

29. Which of the following is a NoSQL database?

Answer

PostgreSQL

Question 30

30. What is a view in SQL?

Answer

A virtual table created from a SELECT query

Answer

A physical table

Answer

A primary key

Answer

A stored procedure

Question 31

31. 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 32

32. What is data redundancy?

Answer

Compressing data

Answer

Encrypting data

Answer

Repeating the same data unnecessarily

Answer

Losing data

Question 33

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

Question 34

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

Answer

Spreadsheet

Answer

Operating system

Question 35

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

Question 36

36. What is a record in a database?

Answer

A row representing one entry

Answer

A column of data

Answer

A table of values

Answer

A file format

Question 37

37. What is a primary key?

Answer

A field used only for sorting

Answer

A field that uniquely identifies a record

Answer

A field that allows null values

Answer

A duplicated field

Question 38

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

Question 39

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

Answer

Adobe Reader

Answer

Microsoft Excel

Question 40

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

Question 41

41. Which one is not an SQL data type?

Question 42

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

Question 43

43. What is a field in a database?

Answer

A single piece of data in a record

Answer

A data file

Answer

A collection of tables

Answer

A group of records

Question 44

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

Question 45

45. What does NULL represent in a database?

Answer

A zero value

Answer

A missing or unknown value

Answer

A false value

Answer

An empty space

Question 46

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

Question 47

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

Question 48

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

Answer

Relational

Answer

Spreadsheet

Answer

Hierarchical

Question 49

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

Question 50

50. What is the default sort order in SQL?

Answer

Alphabetical

Answer

Descending

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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