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AWS CLOUD ARCHITECT ASSOCIATE EXAM
Amazon S3 – 50 MCQs with Answers (2026 Guide)
Amazon S3 (Simple Storage Service) is one of the most important topics in the AWS Cloud Architect Associate Exam. This blog provides 50 exam-focused MCQs with answers and explanations to help you master S3 concepts.
50 AWS S3 MCQs (With Answers)
Q1
What type of storage is Amazon S3?
A. Block storage
B. Object storage
C. File storage
D. Database
✅ Answer: B
Q2
Default S3 storage class?
A. Glacier
B. Standard
C. IA
D. One Zone IA
✅ Answer: B
Q3
Maximum object size in S3?
A. 1 GB
B. 5 GB
C. 5 TB
D. 10 TB
✅ Answer: C
Q4
S3 durability is:
A. 99.9%
B. 99.99%
C. 99.999999999%
D. 100%
✅ Answer: C
Q5
S3 buckets are:
A. Global
B. Region-specific
C. AZ-specific
D. VPC-specific
✅ Answer: B
Q6
Feature for multiple versions of objects:
A. Lifecycle
B. Versioning
C. Replication
D. IAM
✅ Answer: B
Q7
AWS-managed encryption:
A. SSE-C
B. SSE-KMS
C. SSE-S3
D. Client-side
✅ Answer: C
Q8
S3 is:
A. Compute service
B. Object storage
C. Database
D. Network service
✅ Answer: B
Q9
S3 event triggers:
A. EC2
B. Lambda
C. RDS
D. VPC
✅ Answer: B
Q10
Intelligent-Tiering is used for:
A. Backup
B. Cost optimization
C. Compute
D. Networking
✅ Answer: B
Q11
Bucket-level access control:
A. IAM Role
B. Bucket Policy
C. Security Group
D. Route Table
✅ Answer: B
Q12
S3 Glacier is for:
A. Compute
B. Real-time data
C. Archival storage
D. Networking
✅ Answer: C
Q13
Static website hosting feature:
A. IAM
B. Website Hosting
C. Lambda
D. CloudWatch
✅ Answer: B
Q14
S3 stores data in:
A. Tables
B. Buckets
C. Volumes
D. Instances
✅ Answer: B
Q15
Cross-region replication:
A. CRR
B. ACL
C. IAM
D. VPC
✅ Answer: A
Q16
S3 is:
A. Regional
B. Global
C. Local
D. Edge only
✅ Answer: B
Q17
Object-level access control:
A. ACL
B. IAM Role
C. Security Group
D. VPC
✅ Answer: A
Q18
Cheapest long-term storage:
A. Standard
B. IA
C. Glacier Deep Archive
D. One Zone IA
✅ Answer: C
Q19
S3 encryption:
A. At rest
B. In transit
C. Both
D. None
✅ Answer: C
Q20
Lifecycle policies are used to:
A. Delete users
B. Automate storage transitions
C. Scale EC2
D. Monitor logs
✅ Answer: B
Q21
S3 triggers can invoke:
A. Lambda
B. RDS
C. EC2 only
D. IAM
✅ Answer: A
Q22
Data integrity ensured via:
A. Checksums
B. IAM
C. VPC
D. DNS
✅ Answer: A
Q23
Bucket names must be:
A. Unique globally
B. Region-based
C. Account-based
D. Private
✅ Answer: A
Q24
S3 supports:
A. Object versioning
B. SQL execution
C. OS hosting
D. Compute
✅ Answer: A
Q25
Access logging tool:
A. CloudTrail
B. CloudWatch
C. IAM
D. VPC
✅ Answer: A
Q26
S3 optimized for:
A. Compute
B. High durability storage
C. CPU
D. Networking
✅ Answer: B
Q27
Infrequent access class:
A. Standard
B. IA
C. Glacier
D. All
✅ Answer: D
Q28
Replication requires:
A. Versioning enabled
B. IAM disabled
C. Public access
D. Encryption off
✅ Answer: A
Q29
S3 access protocol:
A. HTTP/HTTPS
B. SSH
C. FTP
D. RDP
✅ Answer: A
Q30
Not an S3 class:
A. Standard
B. Glacier
C. Intelligent Tiering
D. EBS
✅ Answer: D
Q31
What is a pre-signed URL in S3 used for?
A. Encrypting objects
B. Temporary access to private objects
C. Creating buckets
D. Deleting objects permanently
✅ Answer: B
💡 Pre-signed URLs provide time-limited access to S3 objects.
Q32
Which feature improves large file uploads in S3?
A. Versioning
B. Multipart upload
C. Replication
D. Lifecycle policy
✅ Answer: B
💡 Multipart upload splits files into parts for parallel upload.
Q33
S3 Transfer Acceleration uses:
A. Edge locations
B. IAM roles
C. VPC endpoints
D. EC2 instances
✅ Answer: A
💡 It uses AWS Edge locations for faster global uploads.
Q34
S3 Object Lock is used for:
A. Encryption
B. Data retention and immutability
C. Access control
D. Backup automation
✅ Answer: B
💡 Prevents objects from being deleted or modified.
Q35
MFA Delete in S3 adds:
A. Encryption layer
B. Extra authentication for deletion
C. Faster uploads
D. Cross-region replication
✅ Answer: B
💡 Requires MFA for deleting objects or bucket versioning changes.
Q36
S3 Access Points are used for:
A. Network routing
B. Simplifying data access at scale
C. EC2 management
D. DNS configuration
✅ Answer: B
💡 Provides dedicated access control for shared datasets.
Q37
S3 EventBridge integration allows:
A. Storage encryption
B. Event-driven automation
C. Manual backups
D. IAM role creation
✅ Answer: B
💡 Sends S3 events to EventBridge for automation workflows.
Q38
Best practice for cost optimization in S3:
A. Use only Standard class
B. Use lifecycle policies
C. Disable encryption
D. Use public buckets
✅ Answer: B
💡 Lifecycle rules move data to cheaper storage classes.
Q39
S3 consistency model provides:
A. Eventual consistency for all operations
B. Strong read-after-write consistency
C. No consistency
D. Random consistency
✅ Answer: B
💡 S3 now supports strong consistency for all operations.
Q40
Which is a best security practice for S3?
A. Public access enabled
B. Disable encryption
C. Least privilege access
D. Use default IAM roles
✅ Answer: C
💡 Always follow least privilege principle.
Q41
Cross-account access in S3 is managed using:
A. IAM policies and bucket policies
B. Security groups
C. VPC peering
D. Route tables
✅ Answer: A
Q42
S3 Analytics is used for:
A. Compute scaling
B. Storage class optimization
C. Database tuning
D. Network routing
✅ Answer: B
Q43
Which feature allows automated movement of objects between storage classes?
A. Versioning
B. Lifecycle rules
C. ACL
D. MFA Delete
✅ Answer: B
Q44
Which S3 feature improves global download speed?
A. IAM roles
B. Transfer Acceleration
C. Glacier
D. CloudTrail
✅ Answer: B
Q45
Object Lock is mainly used for:
A. Logging
B. Compliance & retention
C. Backup only
D. Encryption
✅ Answer: B
Q46
Pre-signed URLs expire after:
A. 1 year
B. Configurable time
C. 10 years
D. Never
✅ Answer: B
Q47
S3 Event notifications can trigger:
A. Lambda functions
B. EC2 only
C. RDS only
D. IAM policies
✅ Answer: A
Q48
Which feature helps analyze storage usage patterns?
A. S3 Analytics
B. IAM
C. CloudTrail
D. VPC Flow Logs
✅ Answer: A
Q49
Best practice for S3 security includes:
A. Public read access
B. Enable encryption + IAM policies
C. Disable logging
D. Use default access
✅ Answer: B
Q50
Cross-account S3 access requires:
A. VPC peering
B. IAM + bucket policy configuration
C. DNS configuration
D. EC2 role only
✅ Answer: B
🎯 FINAL CTA
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