Data Processing Waec Past Questions And Answers (Objective and Theory)

To help you prepare for your WAEC exam, here are 20 questions covering both practical and theoretical aspects of data processing.

 

Practical Questions (15)

1. Which of the following is NOT a primary function of data processing?

a. Data input

b. Data storage

c. Data interpretation

d. Data disposal

Answer: d. Data disposal

 

2. In a spreadsheet, what does the term “cell” refer to?

a. A single data point

b. The entire worksheet

c. A group of cells

d. A row or column

Answer: a. A single data point

 

3. What is the purpose of a data validation rule?

a. To ensure data accuracy and reliability

b. To delete unnecessary data

c. To encrypt data

d. To format data for printing

Answer: a. To ensure data accuracy and reliability

 

4. Which file format is commonly used for compressing a large dataset?

a. .txt

b. .zip

c. .mp3

d. .exe

Answer: b. .zip

 

5. What is the role of a pivot table in data processing?

a. Data entry

b. Data analysis and summarization

c. Data encryption

d. Data deletion

Answer: b. Data analysis and summarization

 

6. How does a relational database organize data?

a. In a single table

b. In multiple interconnected tables

c. In a random order

d. In a text document

Answer: b. In multiple interconnected tables

 

7. What is the purpose of a data backup?

a. To permanently delete unnecessary files

b. To recover lost or corrupted data

c. To create duplicate files

d. To format data for printing

Answer: b. To recover lost or corrupted data

 

8. What does the term “data mining” refer to?

a. Extracting valuable information from a large dataset

b. Deleting unnecessary data

c. Organizing data alphabetically

d. Copying data to another location

Answer: a. Extracting valuable information from a large dataset

 

9. Which of the following is a common data visualization tool?

a. Microsoft Word

b. Adobe Photoshop

c. Tableau

d. Notepad

Answer: c. Tableau

 

10. What is the purpose of a data dictionary?

a. To translate data into different languages

b. To define and describe data elements

c. To delete unnecessary data

d. To format data for printing

Answer: b. To define and describe data elements

 

11. In data processing, what is metadata?

a. Data with errors

b. Data without errors

c. Information about the data

d. Raw data

Answer: c. Information about the data

 

12. How does a barcode scanner contribute to data processing?

a. By generating barcodes

b. By decoding barcodes into readable data

c. By deleting unnecessary data

d. By formatting data for printing

Answer: b. By decoding barcodes into readable data

 

13. What is the purpose of a data audit trail?

a. To track changes made to data

b. To permanently delete unnecessary data

c. To create duplicate files

d. To organize data alphabetically

Answer: a. To track changes made to data

 

14. Which of the following is an example of structured data?

a. Emails

b. Social media posts

c. Excel spreadsheets

d. Word documents

Answer: c. Excel spreadsheets

 

15. How does encryption enhance data security?

a. By compressing data

b. By converting data into a different format

c. By encoding data to make it unreadable without the correct key

d. By deleting unnecessary data

Answer: c. By encoding data to make it unreadable without the correct key

 

Theoretical Questions (5)

16. Define data processing and explain its importance in modern society.

17. Differentiate between batch processing and real-time processing, providing examples of each.

18. Discuss the concept of data normalization in the context of relational databases.

19. Explain the role of data governance in ensuring data quality and integrity.

20. Elaborate on the ethical considerations related to handling and processing sensitive data.

Prepare thoroughly, and may your journey to mastering data processing be both rewarding and successful! Good luck with your WAEC exam!