MCQs on S3 Monitoring, Troubleshooting, and Cost Optimization | Amazon AWS S3

AWS S3 is a flexible cloud storage solution, and efficient management ensures cost savings and high performance. Key topics include S3 Metrics and Analytics with CloudWatch, Troubleshooting Common Issues like permissions and network errors, and Cost Optimization strategies. These 30 MCQs test your understanding and guide you toward expertise in S3 management.

MCQs on S3 Metrics and Analytics with CloudWatch

1. Which CloudWatch metric measures the number of bytes downloaded from S3?
   a) BucketSizeBytes
   b) NumberOfObjects
   c) GetRequests
   d) DownloadBytes
2. What is the primary purpose of S3 Storage Lens?
   a) To track bucket-level encryption
   b) To provide detailed storage analytics and insights
   c) To configure replication policies
   d) To enforce object versioning
3. Which of these is NOT an available S3 CloudWatch metric?
   a) AllRequests
   b) 4xxErrors
   c) ReplicationLatency
   d) EventNotifications
4. How often does CloudWatch update S3 metrics by default?
   a) Every 30 seconds
   b) Every 5 minutes
   c) Every hour
   d) Every 10 minutes
5. What does the 4xxErrors metric track in S3?
   a) Replication failures
   b) Client-side errors
   c) Server-side errors
   d) Encryption failures
6. Which feature in S3 helps visualize storage usage trends?
   a) CloudTrail Logs
   b) S3 Lifecycle Rules
   c) S3 Analytics
   d) Storage Class Viewer
7. To enable advanced metrics for S3 with CloudWatch, what must you do?
   a) Enable versioning
   b) Turn on S3 Request Metrics
   c) Configure lifecycle policies
   d) Enable server-side encryption
8. Which metric should you monitor to track the number of successful object retrievals?
   a) PutRequests
   b) GetRequests
   c) BytesUploaded
   d) 4xxErrors
9. What is the default retention period for S3 CloudWatch metrics?
   a) 1 day
   b) 15 days
   c) 30 days
   d) 14 days
10. Which AWS tool integrates with S3 for anomaly detection in storage metrics?
    a) AWS Trusted Advisor
    b) AWS CloudWatch Logs Insights
    c) AWS Config
    d) AWS CloudTrail

MCQs on Troubleshooting Common Issues (Permissions, Network Errors)

11. Which HTTP status code indicates a permission issue in S3?
    a) 200
    b) 403
    c) 500
    d) 400
12. What is a common cause of the “Access Denied” error in S3?
    a) Incorrect bucket policy
    b) Invalid encryption key
    c) Bucket versioning disabled
    d) Object not replicated
13. Which AWS tool helps identify misconfigured permissions in S3?
    a) AWS Trusted Advisor
    b) AWS CloudFormation
    c) AWS CodePipeline
    d) AWS Elastic Beanstalk
14. What does the S3 error code SlowDown indicate?
    a) Insufficient IAM permissions
    b) Network latency issues
    c) Too many requests in a short time
    d) Server-side encryption failure
15. How do you resolve an S3 “Networking Error” caused by insufficient connectivity?
    a) Enable cross-region replication
    b) Update IAM roles
    c) Check VPC endpoint settings
    d) Adjust lifecycle policies
16. What does the error code NoSuchBucket indicate in S3?
    a) The bucket has no objects
    b) The bucket is not configured for logging
    c) The bucket does not exist or is misspelled
    d) The bucket is in a different region
17. Which IAM policy element is crucial for granting S3 permissions?
    a) Effect
    b) Role
    c) Action
    d) Statement
18. How can you troubleshoot S3 object upload failures?
    a) Check bucket policies and request limits
    b) Enable bucket replication
    c) Update storage class configurations
    d) Re-enable lifecycle rules
19. What is the role of VPC endpoints in troubleshooting S3 access?
    a) They encrypt data transfers to S3
    b) They allow private network access to S3
    c) They reduce storage costs
    d) They enable cross-region replication
20. What tool provides detailed access records for debugging S3 bucket issues?
    a) S3 Analytics
    b) S3 Server Access Logs
    c) CloudWatch Logs
    d) AWS Trusted Advisor

MCQs on Cost Management: Analyzing Usage and Reducing Costs

21. Which S3 feature provides cost insights for optimizing storage use?
    a) S3 Analytics
    b) S3 Inventory Reports
    c) S3 Lifecycle Policies
    d) S3 Object Lock
22. What is the best way to lower storage costs for infrequently accessed data?
    a) Use the Standard storage class
    b) Enable S3 Intelligent-Tiering
    c) Enable object replication
    d) Store data in a private VPC
23. How can you reduce S3 costs by managing small, frequent requests?
    a) Use multipart uploads
    b) Enable transfer acceleration
    c) Batch requests using Amazon SQS
    d) Apply lifecycle policies
24. Which tool helps in estimating S3 costs based on storage usage?
    a) AWS Billing Dashboard
    b) AWS CloudTrail
    c) AWS Config
    d) AWS Compute Optimizer
25. How can lifecycle policies reduce S3 costs?
    a) By increasing replication speed
    b) By automating data transitions to cheaper storage classes
    c) By improving bucket performance
    d) By enforcing stricter access control
26. What is the benefit of using S3 Glacier Deep Archive?
    a) Faster object retrieval
    b) Lowest-cost storage for rarely accessed data
    c) High durability for replicated data
    d) Automatic cost optimization
27. What happens when objects expire as part of lifecycle rules?
    a) They are permanently deleted
    b) They are moved to the Intelligent-Tiering class
    c) They are archived to Glacier
    d) They trigger access logs
28. Which AWS service helps you analyze and control S3 storage costs across accounts?
    a) AWS Trusted Advisor
    b) AWS Cost Explorer
    c) AWS Systems Manager
    d) AWS Lambda
29. How does enabling versioning affect S3 costs?
    a) Reduces costs for older objects
    b) Increases storage costs due to multiple versions
    c) Reduces request costs
    d) Has no impact on costs
30. What is a best practice for reducing costs in multi-region S3 storage?
    a) Use replication across all regions
    b) Use Same-Region Replication
    c) Leverage S3 Analytics to identify unused objects
    d) Delete access logs periodically

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