Applications of hashing MCQs

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1. : What is a common application of hashing in data structures?
(A) Data encryption
(B) Implementing hash tables for fast data retrieval
(C) Sorting data
(D) Compressing files

2. : Which of the following uses hashing for quick access to records?
(A) Linked lists
(B) Binary trees
(C) Hash tables
(D) Stacks

3. : How is hashing used in password storage?
(A) By encrypting passwords
(B) By hashing passwords to store them securely
(C) By compressing passwords
(D) By sorting passwords alphabetically

4. : What is the role of hashing in digital signatures?
(A) To encrypt the signature
(B) To ensure data integrity
(C) To compress the signature
(D) To make the signature reversible

5. : In which application is hashing used for detecting duplicate files?
(A) File indexing
(B) Data compression
(C) File sharing
(D) Digital forensics

6. : How does hashing contribute to cache systems?
(A) By reducing memory usage
(B) By enabling quick data retrieval using keys
(C) By sorting cache entries
(D) By compressing cache data

7. : Which of the following is an application of hashing in network security?
(A) Data encryption
(B) Packet routing
(C) Message authentication codes (MAC)
(D) File compression

8. : What is the purpose of hashing in database indexing?
(A) To sort data
(B) To create unique identifiers for records
(C) To enable fast lookups
(D) To compress records

9. : In version control systems, how is hashing utilized?
(A) To sort commits
(B) To uniquely identify each commit
(C) To compress files
(D) To encrypt sensitive data

10. : Which of the following applications uses hashing for data integrity verification?
(A) File compression
(B) Backup systems
(C) Digital certificates
(D) Memory management

11. : How is hashing applied in cryptocurrency?
(A) To encrypt transactions
(B) To create unique transaction identifiers
(C) To verify transactions and maintain blockchain integrity
(D) To compress transaction data

12. : What is the use of hashing in e-commerce transactions?
(A) To encrypt user data
(B) To securely store user passwords
(C) To quickly retrieve product information
(D) To compress transaction records

13. : In data retrieval, how does hashing improve performance?
(A) By sorting data
(B) By reducing data redundancy
(C) By enabling constant time complexity for lookups
(D) By compressing data

14. : Which data structure often uses hashing to speed up search operations?
(A) Trees
(B) Graphs
(C) Hash tables
(D) Arrays

15. : How is hashing used in image processing?
(A) For image compression
(B) To verify image integrity
(C) For color sorting
(D) To resize images

16. : What is the function of a hash function in online file storage services?
(A) To sort files
(B) To compress files
(C) To ensure data integrity and detect changes
(D) To encrypt files

17. : In web caching, what role does hashing play?
(A) It compresses cached content
(B) It allows quick access to cached data
(C) It sorts cache entries
(D) It encrypts cached data

18. : Which hashing technique is often used in anti-virus software?
(A) Data encryption
(B) Duplicate file detection
(C) Signature-based scanning
(D) Sorting algorithms

19. : What is a primary application of hashing in peer-to-peer networks?
(A) File compression
(B) Efficient data retrieval
(C) Data integrity verification
(D) User authentication

20. : How does hashing assist in load balancing for web servers?
(A) By encrypting data
(B) By distributing requests evenly across servers
(C) By compressing data
(D) By caching responses

21. : Which of the following uses hashing for tracking changes in files?
(A) Version control systems
(B) File compression tools
(C) Media players
(D) Database management systems

22. : In data science, how is hashing applied?
(A) For sorting data
(B) For unique data identification
(C) For data compression
(D) For data visualization

23. : What is the role of hashing in API request validation?
(A) To sort requests
(B) To ensure request integrity
(C) To compress request data
(D) To encrypt request data

24. : Which of the following is a benefit of using hashing in data security?
(A) It is easy to reverse
(B) It allows for data recovery
(C) It provides a unique representation of data
(D) It reduces data size

25. : How is hashing utilized in mobile applications?
(A) For sorting user data
(B) For securely storing sensitive information
(C) For compressing media files
(D) For managing app updates

26. : In social media applications, how does hashing help?
(A) For compressing images
(B) For user identification and login security
(C) For sorting posts
(D) For managing notifications

27. : What role does hashing play in online voting systems?
(A) To encrypt votes
(B) To ensure vote integrity and anonymity
(C) To compress voting data
(D) To sort voters

28. : Which hashing algorithm is commonly used for file integrity checks?
(A) SHA-256
(B) RSA
(C) AES
(D) DES

29. : How does hashing facilitate efficient data retrieval in databases?
(A) By compressing data
(B) By providing a unique key for fast lookups
(C) By sorting data
(D) By encrypting data

30. : In cloud storage, what is the purpose of hashing?
(A) To compress files
(B) To verify file integrity
(C) To encrypt files
(D) To sort files

31. : How does hashing improve the performance of web search engines?
(A) By sorting search results
(B) By indexing web pages
(C) By compressing web content
(D) By encrypting user queries

32. : What is the main advantage of hashing in digital certificates?
(A) It simplifies the certificate structure
(B) It ensures the integrity and authenticity of the certificate
(C) It reduces certificate size
(D) It encrypts certificate data

33. : Which of the following applications benefits from using hash functions for quick access?
(A) Social media platforms
(B) Video streaming services
(C) Online gaming
(D) All of the above

34. : What is the purpose of hashing in content delivery networks (CDNs)?
(A) To compress content
(B) To ensure data consistency across servers
(C) To encrypt user data
(D) To sort content

35. : In what way does hashing assist with network traffic monitoring?
(A) By sorting network packets
(B) By providing unique identifiers for each packet
(C) By compressing traffic data
(D) By encrypting traffic

Data Structures MCQs

Basic Concepts

Linear Data Structures MCQs

Non-Linear Data Structures MCQs

Hashing MCQs MCQs

Hash Tables

Sorting and Searching Algorithms MCQs

Miscellaneous

Applications of hashing MCQs
By: Prof. Dr. Fazal Rehman | Last updated: May 14, 2025

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