Storages

Question 1

A digital media company stores millions of images in S3. Images are accessed frequently for the first 30 days, occasionally until 90 days, and rarely after but must be retained for 5 years. Which solution minimizes costs most efficiently?

Accepted Answer

Configure Lifecycle Policy: Standard (0-30d) → Standard-IA (30-90d) → Glacier Flexible Retrieval (90d+)

Answer

Keep everything in S3 Standard for 5 years

Answer

Use S3 Intelligent-Tiering exclusively

Answer

Manually move to cheaper classes each month

Question 2

An architect needs to design a solution where an S3 bucket automatically replicates objects to another region to meet disaster recovery requirements. Which features must be configured? (Select TWO)

Accepted Answer

Answer

Enable Versioning on both buckets (source and destination)

Answer

Configure S3 Cross-Region Replication (CRR)

Answer

Use S3 Transfer Acceleration

Answer

Enable S3 Object Lock on source

Answer

Configure CloudFront distribution

Question 3

A financial company stores regulatory documents in S3 and needs to ensure all objects are encrypted and the company controls encryption keys with full audit capability. Which solution meets these security requirements most effectively?

Accepted Answer

Use SSE-KMS with Customer Managed Key (CMK) in AWS KMS

Answer

Use SSE-S3 (Server-Side Encryption with S3-managed keys)

Answer

Use SSE-KMS with AWS managed key (aws/s3)

Answer

Use Client-Side Encryption only

Question 4

An architect needs to implement an automated backup strategy for EBS volumes and RDS databases that complies with 35-day retention and allows point-in-time recovery. Which characteristics should the solution have? (Select TWO)

Accepted Answer

Answer

Centralized multi-service management (EBS, RDS, DynamoDB, etc.)

Answer

Automated backup policies with configurable retention

Answer

Requires development of custom Lambda functions

Answer

Only supports EBS snapshots

Answer

Needs manual cron job configuration

Question 5

An e-commerce company stores product images in S3 and occasionally users report incorrect images uploaded by mistake. The architect needs to implement a solution that allows quickly recovering previous versions of objects. Which feature should be enabled?

Accepted Answer

S3 Versioning

Answer

S3 Object Lock with Governance mode

Answer

S3 Lifecycle Policies

Answer

S3 Cross-Region Replication

Question 6

A critical database application on EC2 requires consistent 64,000 IOPS with minimal latency for transactions. Which EBS volume type should the architect use to guarantee the highest performance?

Accepted Answer

EBS io2 Block Express with provisioned IOPS

Answer

EBS gp3 (General Purpose SSD) with 16,000 provisioned IOPS

Answer

EBS st1 (Throughput Optimized HDD)

Answer

EBS sc1 (Cold HDD)

Question 7

A startup needs to archive application logs that must be retained for 10 years for legal requirements but will never be accessed except in extremely rare audits. Which S3 storage class provides the lowest possible cost?

Accepted Answer

S3 Glacier Deep Archive

Answer

S3 Standard-IA (Infrequent Access)

Answer

S3 One Zone-IA

Answer

S3 Glacier Flexible Retrieval

Question 8

A company runs hundreds of Linux EC2 instances that need simultaneous shared access to a common file system with high throughput. Which characteristics should the storage solution have? (Select TWO)

Accepted Answer

Answer

Supports concurrent access from thousands of EC2 instances

Answer

Uses NFS protocol for native mounting on Linux

Answer

Ephemeral storage lost when stopping instances

Answer

Only supports up to 16 instances in same AZ

Answer

Requires FUSE for file system compatibility

Question 9

A global company needs users in Asia, Europe, and America to upload large files (videos) to S3 in us-east-1 as fast as possible. Which S3 feature should the architect enable to significantly accelerate uploads?

Accepted Answer

S3 Transfer Acceleration

Answer

S3 Multipart Upload

Answer

CloudFront with write caching

Answer

S3 Cross-Region Replication

Question 10

An architect designs storage for a big data application that sequentially processes large log files (500GB+) stored on EBS. The application requires high throughput but doesn't need high IOPS. Which EBS volume type is most cost-effective for this use case?

Accepted Answer

EBS st1 (Throughput Optimized HDD)

Answer

EBS gp3 (General Purpose SSD)

Answer

EBS io2 (Provisioned IOPS SSD)

Answer

EBS sc1 (Cold HDD)