Computer Data Basics Test Online

Mustansar KhanLast Updated: October 15, 2025

Important Computer Data Basics Question and Answer

Total Questions:	50
Time Allowed:	25 Minutes
Total Marks:	50
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	ECAT Entry Test Computer Online Test Interview Questions about Computer All Universities Entrance Test Recruitments Tests

Data Basics Practice Test Online With Explanation

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1. Which of the following is not a characteristic of good quality data?

Timeliness

Completeness

Accuracy

Redundancy

2. Which of these best describes metadata?

Compressed data

Backup data

Processed data

Data about data

3. What is the process of identifying and correcting errors in data called?

Data migration

Data compression

Data mining

Data cleaning

4. What does CRUD stand for?

Convert, Run, Use, Download

Create, Read, Update, Delete

Create, Run, Undo, Deliver

Count, Remove, Upload, Download

5. What is data latency?

Delay in processing or transferring data

The security level of the data

The number of columns

The size of the database

6. What is a record in a database?

A single data item

A row of related data

A single field

A column of values

7. Which of the following is qualitative data?

Weight in kilograms

Age in years

Country names

Height in centimeters

8. What does "data processing" mean?

Converting raw data into meaningful information

Deleting data

Typing data

Saving data

9. Which data type is used to store true/false values?

Float

Character

Boolean

Integer

10. Which of the following stores data temporarily?

Hard Drive

RAM

SSD

11. Which term refers to the visual representation of data?

Data modeling

Data redundancy

Data mining

Data visualization

12. What does data compression achieve?

Increases file size

Reduces the size of data files

Converts data into graphics

Deletes unnecessary data

13. What is the purpose of data sampling?

To analyze entire datasets

To encrypt data

To compress data

To reduce the size of data for quicker analysis

14. Which of the following statements is true?

Data is unprocessed facts

Data is meaningful by itself

Data equals information

Data is always stored on paper

15. Which one is used to display data output?

Monitor

Scanner

Microphone

Keyboard

16. What is data redundancy?

Backing up data

Encrypting data

Repeating data storage unnecessarily

Deleting important data

17. Which of these is quantitative data?

Gender

Color of eyes

Age of a person

Type of car

18. Which process combines data from different sources?

Data integration

Data cleaning

Data visualization

Data compression

19. What is big data?

Small sets of data

Extremely large and complex data sets

Data with big fonts

Offline data

20. Which of the following is considered structured data?

Audio files

Images

Video files

Spreadsheets

21. Which of the following is a numeric data type?

Float

String

Char

Boolean

22. What does the term "data" refer to?

Instructions given to the computer

Processed information

Graphics only

Raw facts and figures

23. Which one is not a data type?

Column

Integer

Float

Boolean

24. Which component stores data permanently in a computer?

Hard Disk

RAM

Cache

CPU

25. Which device is primarily used to input data?

Speaker

Printer

Monitor

Mouse

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26. Which one is an example of unstructured data?

HTML table

SQL table

Excel sheet

Image file

27. Which process refers to arranging data in a specific order?

Structuring

Validation

Sorting

Cleaning

28. Which of the following is a primary source of data?

Newspaper report

Research article

Questionnaire response

Textbook

29. Which of the following data types is used to represent textual data?

Float

String

Integer

Boolean

30. Which unit represents approximately 1,024 bytes?

Megabyte

Kilobyte

Gigabyte

Terabyte

31. Which of these best describes data encryption?

Printing data

Converting data into a secure code

Storing data in the cloud

Sorting records alphabetically

32. Which process refers to making backup copies of data?

Copying

Deleting

Formatting

Archiving

33. Which of the following is not a digital data format?

Chalkboard

XML

CSV

JSON

34. Which of the following formats is commonly used to store tabular data?

.exe

.jpg

.csv

.mp3

35. Which one is a binary data format?

ZIP

PDF

HTML

DOCX

36. Which of the following is an example of data mining?

Typing a report

Formatting text

Copying files

Extracting useful patterns from large datasets

37. What is a database?

A collection of images

An organized collection of data

A type of software

A networking device

38. Which of the following is considered volatile data storage?

Hard disk

USB drive

SSD

RAM

39. Which of the following ensures data integrity?

Data validation

Data loss

Data duplication

Data formatting

40. Which of the following is not a basic operation in a database?

Encrypt

Update

Insert

Delete

41. What is structured data stored in?

Videos

Audio formats

Tables with rows and columns

Images

42. What is the full form of ASCII?

American Standard Code for Information Interchange

American Software for Common Internet Input

Automated Standard Code for International Interface

Advanced System for Computer Input and Information

43. Which of the following is the smallest unit of data in a computer?

Bit

Kilobyte

Byte

Megabyte

44. Which of the following is a secondary source of data?

Official government website

Survey conducted by you

Live experiment data

Sensor reading

45. What is the purpose of data validation?

To delete incorrect data

To color rows

To convert data to audio

To ensure data quality and accuracy

46. Which of the following can be used to analyze data?

Calculator

Paint

Microsoft Word

Microsoft Excel

47. What is the primary purpose of a data model?

To increase data

To delete old records

To visually organize and define data relationships

To print data

48. Which of the following is used for data storage?

RAM

CPU

Mouse

SSD

49. What is a data warehouse?

A central repository of integrated data for analysis

A store for archived documents

A place to store physical files

A large server room

50. Which of the following is an example of real-time data?

Archived research papers

Stock market prices

Monthly attendance reports

Old census data

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Mustansar KhanLast Updated: October 15, 2025

Important Computer Data Basics Question and Answer

Data Basics Practice Test Online With Explanation

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