Module 3: Storage & Databases on AWS

Looking for ‘AWS Cloud Technical Essentials module 3 answers’?

In this post, I provide complete, accurate, and detailed explanations for the answers to Module 3: Storage & Databases on AWS of Course 2: AWS Cloud Technical Essentials

Whether you’re preparing for quizzes or brushing up on your knowledge, these insights will help you master the concepts effectively. Let’s dive into the correct answers and detailed explanations for each question!

Week 3 Quiz

Graded Assignment

1. What is a typical use case for Amazon Simple Storage Service (Amazon S3)?

  • Object storage for media hosting ✅
  • Object storage for a boot drive
  • Block storage for an Amazon Elastic Compute Cloud (Amazon EC2) instance
  • File storage for multiple Amazon Elastic Compute Cloud (Amazon EC2) instances

Explanation:
Amazon S3 is ideal for storing unstructured data, such as images, videos, backups, and logs. It’s object storage, not suited for boot drives or file systems shared across EC2.

2. A company needs a storage layer for a high-transaction relational database on an Amazon Elastic Compute Cloud (Amazon EC2) instance. Which service should the company use?

  • Amazon EC2 Instance Store
  • Amazon Elastic Block Store (Amazon EBS) ✅
  • Amazon Simple Storage Service (Amazon S3)
  • Amazon Elastic File System (Amazon EFS)

Explanation:
EBS provides persistent block storage for EC2. It supports high IOPS and is perfect for relational databases.

3. True or False: Amazon Elastic Block Store (Amazon EBS) volumes are considered ephemeral storage.

  • True
  • False ✅

Explanation:
 EBS is persistent storage—data remains after instance termination, unlike EC2 Instance Store, which is ephemeral.

4. A solutions architect is working for a healthcare facility, and they are tasked with storing 7 years of patient information that is rarely accessed. The facility’s IT manager asks the solutions architect to consider one of the Amazon Simple Storage Service (Amazon S3) storage tiers to store the patient information. Which storage tier should the solutions architect suggest?

  • Amazon S3 Standard
  • Amazon S3 Glacier Deep Archive ✅
  • Amazon S3 Standard-Infrequent
  • Access Amazon S3 Intelligent-Tiering

Explanation:
Glacier Deep Archive is designed for long-term cold storage, ideal for data like healthcare records not accessed often.

5. True or False: Object storage is the best storage solution for applications that need to frequently update specific small sections of a file.

  • True
  • False ✅

Explanation:
Object storage like S3 is not optimal for frequent small updates within files—it’s better for full-file operations. Block storage (like EBS) is better for this.

6. True or False: A Multi-AZ deployment is beneficial when users want to increase the availability of their database.

  • True ✅
  • False

Explanation:
Multi-AZ deployment in services like Amazon RDS improves fault tolerance and high availability by replicating across AZs.

7. Which task of running and operating the database are users responsible for when they use Amazon Relational Database Service (Amazon RDS)?

  • Optimizing the database ✅
  • Provisioning and managing the underlying infrastructure
  • Installing the relational database management system on the database instance
  • Installing patches to the operating system for the database instance

Explanation:
RDS is managed, so AWS handles patching, infrastructure, and setup. Users are responsible for tuning queries, schema design, and performance.

8. Which of the following are common use cases for file storage? (Choose TWO.)

  • User home directories ✅
  • Backup files that are stored in Amazon Simple Storage Service (Amazon S3)
  • Relational or non-relational databases
  • Large content repositories ✅
  • Big data analytics

Explanation:
File storage (like Amazon EFS) is ideal for shared access scenarios such as home directories and large, growing content repositories.

9. True or False: The IT department in a company can attach Amazon Elastic Block Store (Amazon EBS) volumes to Amazon Simple Storage Service (Amazon S3) to store data in a bucket.

  • True
  • False ✅

Explanation:
EBS and S3 are separate storage services. You can’t attach an EBS volume to an S3 bucket—they serve different purposes.

10. Which of the following instance families does Amazon Relational Database Service (Amazon RDS) support? (Choose TWO.)

  • Storage optimized
  • General purpose ✅
  • Compute optimized
  • Memory optimized ✅
  • Accelerated computing

Explanation:
RDS supports instance types like general purpose (e.g., db.t3) and memory optimized (e.g., db.r5) for different workloads.

11. A solutions architect is working for a small business. The business is looking for a storage service that temporarily stores frequently changing and non-persistent data. This type of data can be deleted during instance stops or terminations. Which service should the solutions architect recommend for this use case?

  • Amazon Elastic Block Store (Amazon EBS)
  • Amazon Simple Storage Service (Amazon S3)
  • Amazon Elastic Compute Cloud (Amazon EC2) Instance Store ✅
  • Amazon Elastic File System (Amazon EFS)

Explanation:
Instance Store is ephemeral, high-speed storage directly attached to the EC2 host — perfect for non-persistent data.

12. Which database is a non-relational database that stores data in key-value pairs, and is a good fit for hosting simple lookup tables?

  • Amazon DynamoDB ✅
  • Amazon DocumentDB
  • Amazon Neptune
  • Amazon Relational Database Service (Amazon RDS)

Explanation:
DynamoDB is a NoSQL key-value and document database — perfect for simple, low-latency lookups.

13. Which core component of Amazon DynamoDB corresponds to a column in a relational database table?

  • Table
  • Item
  • Attribute ✅
  • Database

Explanation: In DynamoDB:

  • Table → Table
  • Item → Row
  • Attribute → Column

14. Which AWS database service is best suited for use cases such as social networking or recommendation engines?

  • Amazon DynamoDB
  • Amazon Aurora
  • Amazon Redshift
  • Amazon Neptune ✅

Explanation:
Neptune is a graph database, ideal for relationships, such as in social graphs or recommendation engines.

Related contents:

Module 1: AWS Overview and Security
Module 2: Compute & Networking
Modul 4: Monitoring & Optimization

You might also like:

Course 1: Introduction to Information Technology and AWS Cloud
Course 3: Providing Technical Support for AWS Workloads
Course 4: Developing Applications in Python on AWS
Course 5: Skills for Working as an AWS Cloud Consultant
Course 6: DevOps on AWS and Project Management
Course 7: Automation in the AWS Cloud
Course 8: Data Analytics and Databases on AWS
Course 9: Capstone: Following the AWS Well Architected Framework

Leave a Reply