Question 1

A company deployed a serverless application that uses Amazon DynamoDB as a database layer. The application has experienced a large increase in users. The company wants to improve database response time from milliseconds to microseconds and to cache requests to the database.

Which solution will meet these requirements with the LEAST operational overhead?

Options :

A : Use DynamoDB Accelerator (DAX).

B : Migrate the database to Amazon Redshift.

C : Migrate the database to Amazon RDS.

D : Use Amazon ElastiCache for Redis.

Answer: A

Question 2

A company has a web application that includes an embedded NoSQL database. The application runs on Amazon EC2 instances behind an Application Load Balancer (ALB). The instances run in an Amazon EC2 Auto Scaling group in a single Availability Zone.

A recent increase in traffic requires the application to be highly available and for the database to be eventually consistent.

Which solution will meet these requirements with the LEAST operational overhead?

Options :

A : Replace the ALB with a Network Load Balancer. Maintain the embedded NoSQL database with its replication service on the EC2 instances.

B : Replace the ALB with a Network Load Balancer. Migrate the embedded NoSQL database to Amazon DynamoDB by using AWS Database Migration Service (AWS DMS).

C : Modify the Auto Scaling group to use EC2 instances across three Availability Zones. Maintain the embedded NoSQL database with its replication service on the EC2 instances.

D : Modify the Auto Scaling group to use EC2 instances across three Availability Zones. Migrate the embedded NoSQL database to Amazon DynamoDB by using AWS Database Migration Service (AWS DMS).

Answer: D

Question 3

A tech startup is launching an on-demand food delivery platform using Amazon ECS cluster with an AWS Fargate serverless compute engine and Amazon Aurora. It is expected that the database read queries will significantly increase in the coming weeks ahead. A Solutions Architect recently launched two Read Replicas to the database cluster to improve the platform's scalability.

Which of the following is the MOST suitable configuration that the Architect should implement to load balance all of the incoming read requests equally to the two Read Replicas?

Options :

A :

Use the built-in Cluster endpoint of the Amazon Aurora database.

B : Use the built-in Reader endpoint of the Amazon Aurora database.

C : Enable Amazon Aurora Parallel Query.

D : Create a new Network Load Balancer to evenly distribute the read queries to the Read Replicas of the Amazon Aurora database.

Answer: B

Question 4

A content management system (CMS) is hosted on a fleet of auto-scaled, On-Demand EC2 instances that use Amazon Aurora as its database. Currently, the system stores the file documents that the users upload in one of the attached EBS Volumes. Your manager noticed that the system performance is quite slow and he has instructed you to improve the architecture of the system.

In this scenario, what will you do to implement a scalable, high-available POSIX-compliant shared file system?

Options :

A : Use ElastiCache

B : Create an S3 bucket and use this as the storage for the CMS

C : Use EFS

D : Upgrading your existing EBS volumes to Provisioned IOPS SSD Volumes

Answer: C

Question 5

A company runs multiple Amazon EC2 Linux instances in a VPC across two Availability Zones. The instances host applications that use a hierarchical directory structure. The applications need to read and write rapidly and concurrently to shared storage.

What should a solutions architect do to meet these requirements?

Options :

A : Create an Amazon S3 bucket. Allow access from all the EC2 instances in the VPC.

B : Create an Amazon Elastic File System (Amazon EFS) file system. Mount the EFS file system from each EC2 instance.

C : Create a file system on a Provisioned IOPS SSD (io2) Amazon Elastic Block Store (Amazon EBS) volume. Attach the EBS volume to all the EC2 instances.

D : Create file systems on Amazon Elastic Block Store (Amazon EBS) volumes that are attached to each EC2 instance. Synchronize the EBS volumes across the different EC2 instances.

Answer: B