MCQs

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1. What does “revoked key” mean in cloud computing?
   a. A key that is active
   b. A key that is expired
   c. A key that has been invalidated before its original expiration due to exposure or policy changes
   d. A key that is backed up
   Answer: cawjunaid+1
2. Which of the following is NOT a reason keys are revoked in cloud systems?
   a. Key compromise
   b. Key rotation
   c. End of key usage
   d. Key update notification
   Answer: dplerion+1
3. What is the primary risk if a compromised key is NOT revoked?
   a. Increased encryption speed
   b. Unauthorized data access
   c. Cost reduction
   d. Software updates
   Answer: btutorialspoint+1
4. Which cloud service is commonly used for key management, including key revocation?
   a. IaaS
   b. AWS Key Management Service
   c. SaaS
   d. Blockchain
   Answer: binterviewquizz+1
5. What happens when a cloud encryption key is revoked?
   a. It is duplicated
   b. It cannot be used for encryption/decryption
   c. It gains more permissions
   d. It moves to cold storage
   Answer: bawjunaid+2
6. Which standard cloud security framework includes key revocation as a control?
   a. PCI DSS
   b. CSA Cloud Controls Matrix
   c. HIPAA
   d. GDPR
   Answer: bplerion
7. What is a Certificate Revocation List (CRL) used for in cloud security?
   a. Storing backups
   b. Noting revoked public certificates
   c. Auditing admin actions
   d. Listing software updates
   Answer: btutorialspoint
8. When should a symmetric encryption key in the cloud be revoked?
   a. On technology upgrade only
   b. When it’s compromised or obsolete
   c. When storage is full
   d. Whenever new data is stored
   Answer: bawjunaid+1
9. Which entity typically maintains and distributes CRLs for public key certificates?
   a. User
   b. Key repository
   c. Certificate Authority (CA)
   d. Cloud customer
   Answer: ctutorialspoint
10. What is the immediate effect of revoking a key in AWS KMS?
    a. Enhanced speed
    b. Key can’t encrypt/decrypt data
    c. Data is deleted
    d. Key is copied
    Answer: binterviewquizz+1
11. Which mechanism allows cloud users to check if a key is revoked in real time?
    a. CRL
    b. OCSP (Online Certificate Status Protocol)
    c. DNS
    d. SNMP
    Answer: btutorialspoint
12. What must be done after revoking a key that encrypted cloud storage?
    a. Notify users
    b. Re-encrypt data with a new key
    c. Delete all backups
    d. Archive data
    Answer: bexamtopics
13. Which AWS KMS operation disables a key without deleting it?
    a. RotateKey
    b. DisableKey
    c. BackupKey
    d. ImportKey
    Answer: binterviewquizz
14. What best describes “key renewal” in a cloud context?
    a. Removing a key from the system
    b. Replacing a revoked key with a new key
    c. Compressing a key
    d. Duplicating a key
    Answer: btutorialspoint
15. When revoked, a key is
    a. Immediately deleted
    b. Marked invalid and prevented from usage
    c. Backed up to another system
    d. Used with reduced permissions
    Answer: bplerion+1
16. Which protocol is often used alongside CRLs to minimize delays in revocation checking?
    a. IPv6
    b. OCSP
    c. FTP
    d. SFTP
    Answer: btutorialspoint
17. What is the main purpose of key revocation management policies in the cloud?
    a. Minimize encryption costs
    b. Ensure only authorized, valid keys can be used
    c. Standardize OS versions
    d. Increase network speeds
    Answer: btrainingcamp+1
18. In Google Cloud Platform, how is a revoked CMEK managed?
    a. It’s automatically re-enabled
    b. Re-encrypt the data with a new key and delete the old one
    c. Archive it
    d. Convert to asymmetric
    Answer: bexamtopics
19. Which action is not part of key revocation procedures?
    a. Re-encrypting data
    b. Deleting key backups
    c. Disabling or invalidating the key
    d. Publishing CRL
    Answer: bplerion+1
20. Why would a company revoke a key if an employee leaves?
    a. To save costs
    b. Prevent unauthorized decryption
    c. Because of policy updates
    d. Due to hardware failure
    Answer: bplerion
21. A revoked key should be
    a. Used only for backups
    b. Made public
    c. Prevented from being used for any operation
    d. Used in test environments
    Answer: cplerion+1
22. If data remains encrypted with a revoked key, what’s the consequence?
    a. Data becomes more secure
    b. Data may be unrecoverable without backup
    c. Data decrypts faster
    d. Data compresses further
    Answer: bexamtopics+1
23. Which audit activity is essential after key revocation?
    a. Updating firewall rules
    b. Ensuring all data is re-encrypted with the new key
    c. Changing server OS
    d. Increasing disk size
    Answer: bfreecram+1
24. What is dual authorization in KMS?
    a. Two people decrypt data at once
    b. Both must approve key revocation
    c. Two databases must sync before key use
    d. A backup must be present
    Answer: binterviewquizz
25. KMS revocation events are best logged in
    a. Application logs
    b. Key management audit trails
    c. Printer logs
    d. Network logs
    Answer: bplerion
26. Which of the following does NOT typically result in key revocation?
    a. Compromise of key
    b. Scheduled key rotation
    c. Public disclosure of secret
    d. User request for increased capacity
    Answer: dmassedcompute+1
27. Which key type is referenced in a CRL?
    a. Symmetric only
    b. Asymmetric public keys
    c. Hash keys
    d. All keys
    Answer: btutorialspoint
28. Why is key revocation essential in cloud environments?
    a. It automates billing
    b. Cloud resources are shared and threats are dynamic
    c. It reduces physical storage
    d. It upgrades network speed
    Answer: bawjunaid+1
29. Key revocation activities should focus first on
    a. Least sensitive data
    b. Most sensitive data
    c. Oldest files
    d. Metadata
    Answer: bplerion
30. Which of the following is a complementary practice, but not a full alternative to key revocation?
    a. Frequent data backups
    b. Short key lifetimes
    c. Key rotation
    d. Disabling applications
    Answer: cplerion
31. Who should have access to perform key revocation in the cloud?
    a. General users
    b. Authorized administrators
    c. All API users
    d. Developers by default
    Answer: binterviewquizz+1
32. What mechanism can revoke symmetric keys in cloud KMS?
    a. Removing from system (delete/invalidate)
    b. Posting in DNS
    c. Publishing on CRL
    d. Running OSCP check
    Answer: aawjunaid+1
33. What is the risk if a revoked key is still trusted by applications?
    a. Faster encryption
    b. Data breach possible
    c. Lower storage usage
    d. Faster backups
    Answer: bplerion
34. A cloud provider’s key revocation policy should cover
    a. Employee training
    b. All stages: key creation, activation, suspension, revocation, destruction
    c. Software licenses
    d. Hardware upgrades
    Answer: bawjunaid+1
35. What type of keys may NOT need revocation?
    a. Public keys
    b. Hashing keys not used for encryption
    c. Root CA
    d. Symmetric keys
    Answer: bplerion
36. On revocation, AWS KMS allows re-enabling a key. What is required?
    a. Administrator permission
    b. Customer master key
    c. API key
    d. Billing increase
    Answer: ainterviewquizz
37. Key rotation differs from revocation because
    a. Rotation replaces the key with a new one for continued use
    b. Rotation deletes data
    c. Revocation is for unreadable data
    d. Only applies to public keys
    Answer: amassedcompute+1
38. When a key is revoked, which action must follow immediately for continued operation?
    a. Notify OS vendor
    b. Migrate data to a new key
    c. Change user passwords
    d. Increase RAM
    Answer: bexamtopics
39. What is an HSM’s role in key revocation?
    a. Hardware proof of deletion
    b. Secure key storage and revocation enforcement
    c. Host operating system updates
    d. Data network backup
    Answer: binterviewquizz
40. Why must re-encryption follow key revocation?
    a. Speeds up backups
    b. Ensures data accessibility and security
    c. Minimizes CPU usage
    d. Prevents connection drops
    Answer: bexamtopics+1
41. What happens to data encrypted with a deleted KMS key without backup?
    a. Encrypted data becomes permanently inaccessible
    b. Data can be restored by cloud provider
    c. Data gets cloned
    d. Data is downloaded automatically
    Answer: ainterviewquizz
42. Which AWS KMS feature forces a waiting period before key deletion?
    a. Key enablement
    b. Key policy
    c. Scheduled deletion
    d. Multi-region key
    Answer: cinterviewquizz
43. What is the best mitigation if a key is suspected to be compromised but not yet confirmed?
    a. Disable the key and monitor
    b. Increase encryption rounds
    c. Export all data
    d. Notify users immediately
    Answer: ainterviewquizz+1
44. Why should key revocation be prioritized for the most sensitive resources?
    a. They have higher risk if exposed
    b. They’re accessed more
    c. They’re cheaper
    d. They have long filenames
    Answer: aplerion
45. What risk is introduced if an organization fails to implement key revocation?
    a. Loss of hardware
    b. Unauthorized decryption and data breach
    c. Increased latency
    d. Update issues
    Answer: bplerion
46. In the event of accidental key deletion in KMS, what is the fallback for encrypted data?
    a. Use recovery mode
    b. No fallback, data is lost
    c. Contact cloud vendor for restoration
    d. Use cached key copies
    Answer: binterviewquizz
47. What standard process notifies applications of a key’s revoked status?
    a. Application registration
    b. CRL or OCSP
    c. DNS update
    d. System reboot
    Answer: btutorialspoint
48. What does “suspending” a key mean?
    a. Making it temporarily unusable without deleting
    b. Duplicating
    c. Speeding up encryption
    d. Changing ownership
    Answer: ainterviewquizz
49. Who dictates the process for revocation, rotation, and renewal of keys in the cloud?
    a. End-user
    b. Policy and compliance requirements (e.g. CSA CCM)
    c. Hardware vendor
    d. Network administrator only
    Answer: bplerion
50. How does revoking keys help meet regulatory compliance in the cloud?
    a. Meets mandated controls for data confidentiality, integrity, and access management
    b. Improves application performance
    c. Reduces developer time
    d. Provides more storage
    Answer: amassedcompute+2

1. https://awjunaid.com/cryptography/key-revocation-in-cryptography/
2. https://www.plerion.com/cloud-knowledge-base/key-revocation
3. https://www.tutorialspoint.com/cryptography/cryptography_key_revocation.htm
4. https://www.interviewquizz.com/cloud-encryption-keys-management-kms-interview-question-answer
5. https://www.examtopics.com/discussions/google/view/129911-exam-professional-data-engineer-topic-1-question-298/
6. https://trainingcamp.com/glossary/key-revocation-strategy/
7. https://www.freecram.net/question/Google.Professional-Cloud-Security-Engineer.v2023-05-10.q124/your-security-team-uses-encryption-keys-to-ensure-confidentiality-of-user-data-you-want-to-establish
8. https://massedcompute.com/faq-answers/?question=Can+you+explain+the+process+of+key+rotation+and+revocation+in+cloud-based+encryption+systems%3F
9. https://www.sanfoundry.com/operating-system-mcqs-protection-revocation-access-rights/
10. https://www.sanfoundry.com/1000-cloud-computing-questions-answers/
11. https://www.scribd.com/document/541792862/Cloud-Computing-MCQ-Questions-and-Answers-PDF-Tutorial
12. https://tutorialsinhand.com/aptitudes/cloud-computing-mcq/cloud-computing-mcq/cloud-computing-mcq-set-1.aspx
13. https://www.studocu.com/in/document/anna-university/cloud-computing-cs8791/300-top-cloud-computing-objective-questions-answers-mcqs/11718156
14. http://www.placementpreparation.io/mcq/cloud-computing/page/4/
15. https://examradar.com/fundamentals-of-cloud-computing-and-cloud-services-mcqs/
16. https://www.examtopics.com/discussions/google/view/32927-exam-professional-cloud-security-engineer-topic-1-question/
17. https://emorah.com/story/fresco-play/cloud-computing-fresco-play-mcqs-answers/
18. https://www.whizlabs.com/blog/ccsk-exam-sample-questions/
19. https://www.scribd.com/document/798168434/Cloud-Computing-Multiple-Choice-Questions-accenture
20. https://www.geeksforgeeks.org/computer-networks/easy-key-management-in-cryptography/