MCQs

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1. Which of the following is a primary use of hashing algorithms in cloud computing?
   a. Sorting data
   b. Encrypting text
   c. Ensuring data integrity
   d. Compressing files
   Answer: c. Ensuring data integritycrowdstrike+2
2. Which hashing algorithm produces a 128-bit hash value and was once widely used for integrity checks but is now considered insecure?
   a. SHA-256
   b. MD5
   c. CRC32
   d. Whirlpool
   Answer: b. MD52brightsparks+1
3. Which property is most important for a cryptographic hash function in secure cloud applications?
   a. Reversibility
   b. Speed
   c. Collision resistance
   d. Large output size
   Answer: c. Collision resistancegeeksforgeeks+2
4. What is the hash value length generated by SHA-256?
   a. 128 bits
   b. 160 bits
   c. 256 bits
   d. 512 bits
   Answer: c. 256 bitswikipedia+2
5. Which hashing technique is often used in distributed cloud storage for load balancing and node assignment?
   a. MD5
   b. Consistent Hashing
   c. Linear Probing
   d. Open Addressing
   Answer: b. Consistent Hashinghighscalability
6. In cloud security, which characteristic is NOT a requirement for a strong hashing algorithm?
   a. Preimage resistance
   b. Deterministic output
   c. Easy reversibility
   d. Avalanche effect
   Answer: c. Easy reversibilitycrowdstrike+1
7. Which of these is NOT a cryptographic hash algorithm?
   a. SHA-1
   b. MD5
   c. AES
   d. SHA-512
   Answer: c. AES2brightsparks+1
8. Which modern hash function family includes SHA-224, SHA-256, SHA-384, and SHA-512?
   a. SHA-0
   b. SHA-1
   c. SHA-2
   d. Whirlpool
   Answer: c. SHA-2geeksforgeeks+2
9. The process by which two different inputs produce the same hash output is called:
   a. Mapping
   b. Chaining
   c. Collision
   d. Avalanche
   Answer: c. Collisiongeeksforgeeks+1
10. What is the main consequence of hash collisions in cloud data storage?
    a. Data compression
    b. Security breaches
    c. Data duplication
    d. Performance improvement
    Answer: b. Security breaches2brightsparks+1
11. Why is SHA-1 not recommended for secure applications in the cloud?
    a. Too slow
    b. High collision risk
    c. Too new
    d. Hard to implement
    Answer: b. High collision riskwikipedia+1
12. Which algorithm is commonly used for password hashing in cloud authentication services?
    a. MD2
    b. Argon2
    c. DES
    d. Blowfish
    Answer: b. Argon2indeed+1
13. Which of the following is a one-way function?
    a. Hash function
    b. Symmetric cipher
    c. Asymmetric cipher
    d. Random generator
    Answer: a. Hash functionokta+1
14. In consistent hashing, what does the term “hash ring” refer to?
    a. Circular buffer for key storage
    b. A circular arrangement of hash values
    c. Encrypting hashes in a loop
    d. Replicating data n times
    Answer: b. A circular arrangement of hash valueshighscalability
15. The avalanche effect in hashing means:
    a. A hash function is unstable
    b. Small input changes drastically alter the output
    c. Hash output grows exponentially
    d. Output is always predictable
    Answer: b. Small input changes drastically alter the outputcrowdstrike+1
16. Which is NOT a standard application of hashing in cloud computing?
    a. Data deduplication
    b. Load balancing
    c. Video rendering
    d. Digital signatures
    Answer: c. Video renderinggeeksforgeeks+2
17. What is the output size of SHA-512?
    a. 256 bits
    b. 512 bits
    c. 384 bits
    d. 128 bits
    Answer: b. 512 bitsgeeksforgeeks+1
18. What is RIPEMD-160 commonly used for?
    a. Text compression
    b. File integrity
    c. Cloud authentication
    d. Hash table lookups
    Answer: b. File integrityindeed+1
19. Which of the following indicates a strong hash function?
    a. Fast computation only
    b. Good compression
    c. Prevention of collision and preimage attacks
    d. Large memory usage
    Answer: c. Prevention of collision and preimage attackscrowdstrike+1
20. Which statement describes the use of CRC32 in the cloud?
    a. Used for encrypting cloud data
    b. Mainly for quick error checking
    c. Suitable for sensitive password storage
    d. Used for hashing large files securely
    Answer: b. Mainly for quick error checking2brightsparks
21. In a hash table, what is the main purpose of chaining?
    a. Increase hash value range
    b. Handle collisions
    c. Encrypt stored data
    d. Compress data
    Answer: b. Handle collisionssanfoundry+1
22. Which hashing algorithm is recommended for new cloud applications requiring high security?
    a. MD5
    b. SHA-1
    c. SHA-256
    d. LANMAN
    Answer: c. SHA-256wikipedia+2
23. What is the primary difference between a hash function and an encryption algorithm?
    a. Hash functions are reversible
    b. Hash functions output fixed size data
    c. Encryption produces random output
    d. Hashing is a two-way function
    Answer: b. Hash functions output fixed size dataokta+1
24. Which of these properties does NOT apply to a cryptographic hash function?
    a. Preimage resistance
    b. Avalanche effect
    c. Easy inversion
    d. Collision resistance
    Answer: c. Easy inversiongeeksforgeeks+1
25. What is the full form of SHA in cloud hashing algorithms?
    a. Secure Hash Algorithm
    b. Simple Hash Assignment
    c. Secure Host Attribute
    d. Sequence Hash Algorithm
    Answer: a. Secure Hash Algorithmwikipedia
26. Which property of hash functions helps prevent attackers from generating the original input from a hash?
    a. Collision resistance
    b. Preimage resistance
    c. Determinism
    d. Idempotence
    Answer: b. Preimage resistancecrowdstrike+1
27. Which cryptographic hash algorithm is widely used in blockchain technology?
    a. SHA-512
    b. MD4
    c. SHA-256
    d. Whirlpool
    Answer: c. SHA-2562brightsparks+1
28. The term “digest” in hash algorithms refers to:
    a. The hash input itself
    b. The output value produced
    c. The time taken to hash
    d. The process of chaining
    Answer: b. The output value producedcrowdstrike+1
29. Which method is used in cloud data centers for distributing workload evenly among servers?
    a. Chaining
    b. Linear probing
    c. Consistent hashing
    d. Double hashing
    Answer: c. Consistent hashinghighscalability
30. In digital signatures, which role does hashing play?
    a. Encrypts messages directly
    b. Verifies data integrity
    c. Stores passwords
    d. Loads application faster
    Answer: b. Verifies data integritygeeksforgeeks+2
31. What happens if a hash algorithm is too slow for cloud file storage?
    a. Security increases
    b. Storage costs rise
    c. File uploads are delayed
    d. Collisions increase
    Answer: c. File uploads are delayed2brightsparks+1
32. Which hashing algorithm was designed specifically for the Ethereum blockchain?
    a. Scrypt
    b. Ethash
    c. RIPEMD-160
    d. SHA-2
    Answer: b. Ethashcrowdstrike
33. What is the result of applying a deterministic hash function to the same input multiple times?
    a. Different output each time
    b. Slower processing
    c. Identical outputs each time
    d. Collisions are frequent
    Answer: c. Identical outputs each timegeeksforgeeks+1
34. What is Scrypt best known for in the context of hashing in the cloud?
    a. Memory-hard algorithm for password hashing
    b. Fastest hashing speed
    c. Blockchain proof-of-stake
    d. Quantum resistance
    Answer: a. Memory-hard algorithm for password hashingindeed+1
35. Which hash function is now avoided due to high vulnerability to collisions?
    a. SHA-512
    b. SHA-256
    c. MD5
    d. Scrypt
    Answer: c. MD52brightsparks+1
36. Which of the following is essential for validating software downloads in the cloud?
    a. MD2
    b. SHA-256
    c. Tiger
    d. RC4
    Answer: b. SHA-2562brightsparks
37. Which cloud hashing principle states that no two different inputs should produce the same output?
    a. Preimage resistance
    b. Collision resistance
    c. Determinism
    d. Entropy
    Answer: b. Collision resistancegeeksforgeeks+1
38. What happens in the cloud if a weak hash function is used to store file fingerprints?
    a. Efficient storage
    b. Faster searches
    c. Risk of duplicate detection failure
    d. Improved load balancing
    Answer: c. Risk of duplicate detection failure2brightsparks
39. In hash chaining for collision handling, elements are stored as:
    a. Trees
    b. Linked lists
    c. Arrays
    d. Hash maps
    Answer: b. Linked listssanfoundry+1
40. Which is not a property of good hash functions used in the cloud?
    a. Uniform distribution
    b. Deterministic
    c. Easy to reverse
    d. Minimal collisions
    Answer: c. Easy to reversecrowdstrike+1
41. Which hash algorithm is part of the SHA-3 family?
    a. Keccak
    b. SHA-256
    c. SHA-1
    d. CRC32
    Answer: a. Keccakwikipedia
42. The main advantage of using hash-based message authentication codes (HMAC) in the cloud is:
    a. Faster hashing
    b. Confidentiality of data
    c. Data integrity and authentication
    d. Colorful output
    Answer: c. Data integrity and authenticationgeeksforgeeks+1
43. Which statement about MD5 and SHA-1 is correct?
    a. Both are strongly recommended for new secure applications
    b. Only SHA-1 is vulnerable to collision attacks
    c. Both are outdated due to collision vulnerabilities
    d. MD5 is more secure than SHA-256
    Answer: c. Both are outdated due to collision vulnerabilitiesgeeksforgeeks+1
44. What does the term “hash table” refer to in cloud storage systems?
    a. Physical table storing passwords
    b. Data structure mapping keys to values
    c. An optimized SQL table
    d. Cloud hardware component
    Answer: b. Data structure mapping keys to valuesgeeksforgeeks
45. Which scenario would benefit most from a fast but insecure hash function?
    a. Storing cloud passwords
    b. Digital signatures
    c. File integrity checks for non-critical data transfers
    d. Securing web transactions
    Answer: c. File integrity checks for non-critical data transfers2brightsparks
46. Which property should a cloud hash function not compromise, even for speed?
    a. Collision resistance
    b. Output length
    c. Compression ratio
    d. Simplicity
    Answer: a. Collision resistancecrowdstrike+2
47. What is the primary reason for hashing user passwords in the cloud?
    a. Reduce storage space
    b. Prevent plaintext storage and protect security
    c. Increase computational requirements
    d. Fast retrieval
    Answer: b. Prevent plaintext storage and protect securityindeed+2
48. Which hashing method helps minimize data movement when adding/removing nodes in a distributed cloud system?
    a. Double hashing
    b. Consistent hashing
    c. Linear rehashing
    d. Quadratic probing
    Answer: b. Consistent hashinghighscalability
49. What does it mean if a hash function is deterministic?
    a. It produces the same output for the same input
    b. Outputs are random each time
    c. It cannot be used in cryptography
    d. It compresses data
    Answer: a. It produces the same output for the same inputgeeksforgeeks
50. Which hashing algorithm is considered quantum-resistant for future cloud security?
    a. SHA-1
    b. MD5
    c. SHA-3
    d. CRC32
    Answer: c. SHA-3wikipedia

1. https://www.crowdstrike.com/en-us/cybersecurity-101/data-protection/data-hashing/
2. https://www.2brightsparks.com/resources/articles/introduction-to-hashing-and-its-uses.html
3. https://www.geeksforgeeks.org/dsa/what-is-hashing/
4. https://www.geeksforgeeks.org/dsa/hash-functions-and-list-types-of-hash-functions/
5. https://en.wikipedia.org/wiki/Secure_Hash_Algorithms
6. https://highscalability.com/consistent-hashing-algorithm/
7. https://in.indeed.com/career-advice/career-development/what-is-hashing
8. https://www.okta.com/identity-101/hashing-algorithms/
9. https://www.sanfoundry.com/database-mcqs-hashing-techniques/
10. https://www.sanfoundry.com/hashing-functions-multiple-choice-questions-answers-mcqs/
11. https://www.geeksforgeeks.org/quizzes/top-mcqs-on-hash-data-strcuture-with-answers/
12. https://testbook.com/objective-questions/mcq-on-hashing–5eea6a0c39140f30f369e0c1
13. https://www.includehelp.com/mcq/dbms-hashing-mcqs.aspx
14. https://www.examveda.com/data-structure/practice-mcq-question-on-hashing/
15. https://www.loginradius.com/docs/security/user-security/password-management/cryptographic-hashing-algorithms/
16. https://www.scribd.com/document/515731319/MCQ-Hash-Function-Technique
17. https://t4tutorials.com/hashing-mcqs-mcqs/
18. https://www.youtube.com/watch?v=uiP6yQnGu_s
19. https://www.geeksforgeeks.org/computer-networks/how-hashing-algorithm-used-in-cryptography/
20. https://letsfindcourse.com/blockchain-mcq/hashing-mcq-questions-and-answers