1. Question 1

Typical use case for Amazon S3

• ✅ Object storage for media hosting

• ❌ Object storage for a boot drive

• ❌ Block storage for EC2 instance

• ❌ File storage for multiple EC2 instances

Explanation:
S3 is designed for object storage such as media, backups, logs, documents.

---

2. Question 2

Storage for high-transaction relational DB on EC2

• ❌ Instance Store

• ✅ Amazon EBS

• ❌ S3

• ❌ EFS

Explanation:
Databases on EC2 need block storage, and EBS is high-performance, durable block storage.

---

3. Question 3

EBS is ephemeral storage

• ❌ True

• ✅ False

Explanation:
EBS is persistent storage.
Instance Store is ephemeral.

---

4. Question 4

Best S3 tier for 7-year, rarely accessed data

• ❌ S3 Standard

• ✅ S3 Glacier Deep Archive

• ❌ S3 Standard-IA

• ❌ S3 Intelligent-Tiering

Explanation:
Deep Archive is the lowest cost tier for long-term cold storage.

---

5. Question 5

Object storage is best for frequently updating small parts of a file

• ❌ True

• ✅ False

Explanation:
Object storage requires rewriting the whole object, not partial updates.
Block storage is best for this.

---

6. Question 6

Multi-AZ increases database availability

• ✅ True

• ❌ False

Explanation:
Multi-AZ provides automatic failover and high availability.

---

7. Question 7

What are users responsible for in RDS?

• ✅ Optimizing the database

• ❌ Managing infrastructure

• ❌ Installing DB engine

• ❌ Installing OS patches

Explanation:
AWS manages hardware, OS, patches, backups—users only manage schema, queries, performance.

---

8. Question 8 (Choose TWO)

Common use cases for file storage

• ✅ User home directories

• ❌ Backup files in S3

• ❌ Databases

• ✅ Large content repositories

• ❌ Big data analytics

Explanation:
File storage (EFS, FSx) is suited for shared directories and content repositories.

---

9. Question 9

Can EBS volumes attach to S3?

• ❌ True

• ✅ False

Explanation:
EBS attaches only to EC2 instances, not to S3.

---

10. Question 10 (Choose TWO)

Instance families supported by RDS

• ❌ Storage optimized

• ✅ General purpose

• ❌ Compute optimized

• ✅ Memory optimized

• ❌ Accelerated computing

Explanation:
RDS supports General Purpose (M class) and Memory Optimized (R class).

---

11. Question 11

Storage for frequently changing, temporary, non-persistent data

• ❌ EBS

• ❌ S3

• ✅ EC2 Instance Store

• ❌ EFS

Explanation:
Instance Store is temporary, fast storage that is deleted when instance stops or terminates.

---

12. Question 12

Key-value, non-relational, simple lookup tables

• ✅ Amazon DynamoDB

• ❌ DocumentDB

• ❌ Neptune

• ❌ RDS

Explanation:
DynamoDB is a NoSQL key-value database.

---

13. Question 13

DynamoDB term that equals a column

• ❌ Table

• ❌ Item

• ✅ Attribute

• ❌ Database

Explanation:
In DynamoDB:

• Table = RDS table

• Item = row

• Attribute = column

---

14. Question 14

Best suited for social networking / recommendation engines

• ❌ DynamoDB

• ❌ Aurora

• ❌ Redshift

• ✅ Amazon Neptune

Explanation:
Neptune is a graph database, ideal for social networks, relationships, recommendation graphs.

---

🧾 Summary Table

---