Amazon
SAA-C03 Exam
Questions

AWS Certified Solutions Architect - Associate SAA-C03

Amazon (SAA-C03) Exam Questions And Answers page 61

How to ensure scalability of a web application running on AWS Fargate with ALB and Aurora?

Multiple Choice

A solutions architect is designing the architecture for a new web application. The application will run on AWS Fargate containers with an Application Load Balancer (ALB) and an Amazon Aurora PostgreSQL database. The web application will perform primarily read queries against the database.

What should the solutions architect do to ensure that the website can scale with increasing traffic? (Choose two.)

Enable auto scaling on the ALB to scale the load balancer horizontally.

Configure Aurora Auto Scaling to adjust the number of Aurora Replicas in the Aurora cluster dynamically.

Enable cross-zone load balancing on the ALB to distribute the load evenly across containers in all Availability Zones.

Configure an Amazon Elastic Container Service (Amazon ECS) cluster in each Availability Zone to distribute the load across multiple Availability Zones.

Configure Amazon Elastic Container Service (Amazon ECS) Service Auto Scaling with a target tracking scaling policy that is based on CPU utilization.

Design Resilient Architectures Define Performant Architectures

How can a solutions architect ensure that the architecture supports distributed session data management?

Single Choice

A solutions architect is designing the architecture of a new application being deployed to the AWS Cloud. The application will run on Amazon EC2 On-Demand Instances and will automatically scale across multiple Availability Zones. The EC2 instances will scale up and down frequently throughout the day. An Application Load Balancer (ALB) will handle the load distribution. The architecture needs to support distributed session data management. The company is willing to make changes to code if needed.

What should the solutions architect do to ensure that the architecture supports distributed session data management?

Use Amazon ElastiCache to manage and store session data.

Use session affinity (sticky sessions) of the ALB to manage session data.

Use Session Manager from AWS Systems Manager to manage the session.

Use the GetSessionToken API operation in AWS Security Token Service (AWS STS) to manage the session.

Design Resilient Architectures Design Cost-Optimized Architectures

What is the most cost-effective solution for hosting hundreds of machine learning models with high availability and low latency?

Single Choice

A solutions architect is designing the cloud architecture for a company that needs to host hundreds of machine learning models for its users. During startup, the models need to load up to 10 GB of data from Amazon S3 into memory, but they do not need disk access. Most of the models are used sporadically, but the users expect all of them to be highly available and accessible with low latency.

Which solution meets the requirements and is MOST cost-effective?

Deploy models as AWS Lambda functions behind an Amazon API Gateway for each model.

Deploy models as Amazon Elastic Container Service (Amazon ECS) services behind an Application Load Balancer for each model.

Deploy models as AWS Lambda functions behind a single Amazon API Gateway with path-based routing where one path corresponds to each model.

Deploy models as Amazon Elastic Container Service (Amazon ECS) services behind a single Application Load Balancer with path-based routing where one path corresponds to each model.

Define Performant Architectures Design Cost-Optimized Architectures

How should the solutions architect design the cloud architecture for a stateless application on AWS?

Single Choice

A solutions architect is designing the cloud architecture for a new application being deployed on AWS. The process should run in parallel while adding and removing application nodes as needed based on the number of jobs to be processed. The processor application is stateless. The solutions architect must ensure that the application is loosely coupled and the job items are durably stored.

Which design should the solutions architect use?

Create an Amazon SNS topic to send the jobs that need to be processed. Create an Amazon Machine Image (AMI) that consists of the processor application. Create a launch configuration that uses the AMI. Create an Auto Scaling group using the launch configuration. Set the scaling policy for the Auto Scaling group to add and remove nodes based on CPU usage.

Create an Amazon SQS queue to hold the jobs that need to be processed. Create an Amazon Machine Image (AMI) that consists of the processor application. Create a launch configuration that uses the AMI. Create an Auto Scaling group using the launch configuration. Set the scaling policy for the Auto Scaling group to add and remove nodes based on network usage.

Create an Amazon SQS queue to hold the jobs that need to be processed. Create an Amazon Machine Image (AMI) that consists of the processor application. Create a launch template that uses the AMI. Create an Auto Scaling group using the launch template. Set the scaling policy for the Auto Scaling group to add and remove nodes based on the number of items in the SQS queue.

Create an Amazon SNS topic to send the jobs that need to be processed. Create an Amazon Machine Image (AMI) that consists of the processor application. Create a launch template that uses the AMI. Create an Auto Scaling group using the launch template. Set the scaling policy for the Auto Scaling group to add and remove nodes based on the number of messages published to the SNS topic.

Design Resilient Architectures Define Performant Architectures

Correct Answer:

Create an Amazon SQS queue to hold the jobs that need to be processed. Create an Amazon Machine Image (AMI) that consists of the processor application. Create a launch template that uses the AMI. Create an Auto Scaling group using the launch template. Set the scaling policy for the Auto Scaling group to add and remove nodes based on the number of items in the SQS queue.

Explanation:

Amazon Simple Queue Service
Amazon Simple Queue Service (SQS) is a fully managed message queuing service that enables you to decouple and scale microservices, distributed systems, and serverless applications. SQS eliminates the complexity and overhead associated with managing and operating message oriented middleware, and empowers developers to focus on differentiating work. Using SQS, you can send, store, and receive messages between software components at any volume, without losing messages or requiring other services to be available. Get started with SQS in minutes using the AWS console, Command Line Interface or SDK of your choice, and three simple commands.
SQS offers two types of message queues. Standard queues offer maximum throughput, best-effort ordering, and at-least-once delivery. SQS FIFO queues are designed to guarantee that messages are processed exactly once, in the exact order that they are sent.
Scaling Based on Amazon SQS
There are some scenarios where you might think about scaling in response to activity in an Amazon SQS queue. For example, suppose that you have a web app that lets users upload images and use them online. In this scenario, each image requires resizing and encoding before it can be published. The app runs on EC2 instances in an Auto Scaling group, and it's configured to handle your typical upload rates. Unhealthy instances are terminated and replaced to maintain current instance levels at all times. The app places the raw bitmap data of the images in an SQS queue for processing. It processes the images and then publishes the processed images where they can be viewed by users. The architecture for this scenario works well if the number of image uploads doesn't vary over time. But if the number of uploads changes over time, you might consider using dynamic scaling to scale the capacity of your Auto Scaling group.
https://aws.amazon.com/sqs/#:~:text=Amazon%20SQS%20leverages%20the%20AWS,queues%20provide%20nearly%20unlimited%20throughput
https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-using-sqs-queue.html

References:

https://aws.amazon.com/sqs/#:~:text=Amazon%20SQS%20leverages%20the%20AWS,queues%20provide%20nearly%20unlimited%20throughputhttps://docs.aws.amazon.com/autoscaling/ec2/userguide/as-using-sqs-queue.html

What scalable solutions should be recommended for a cloud architecture that allows file interaction?

Multiple Choice

A solutions architect is designing the cloud architecture for a new application being deployed to AWS. The application allows users to interactively download and upload files. Files older than 2 years will be accessed less frequently. The solutions architect needs to ensure that the application can scale to any number of files while maintaining high availability and durability.

Which scalable solutions should the solutions architect recommend? (Choose two.)

Store the files on Amazon S3 with a lifecycle policy that moves objects older than 2 years to S3 Glacier.

Store the files on Amazon S3 with a lifecycle policy that moves objects older than 2 years to S3 Standard-Infrequent Access (S3 Standard-IA)

Store the files on Amazon Elastic File System (Amazon EFS) with a lifecycle policy that moves objects older than 2 years to EFS Infrequent Access (EFS IA).

Store the files in Amazon Elastic Block Store (Amazon EBS) volumes. Schedule snapshots of the volumes. Use the snapshots to archive data older than 2 years.

Store the files in RAID-striped Amazon Elastic Block Store (Amazon EBS) volumes. Schedule snapshots of the volumes. Use the snapshots to archive data older than 2 years.

Design Resilient Architectures Define Performant Architectures

Which AWS solution meets the requirements for a scalable, durable cloud architecture for file storage?

Single Choice

A solutions architect is designing the cloud architecture for a new application that is being deployed on AWS. The application s users will interactively download and upload files. Files that are more than 90 days old will be accessed less frequently than newer files, but all files need to be instantly available. The solutions architect must ensure that the application can scale to store petabytes of data with maximum durability.

Which solution meets these requirements?

Store the files in Amazon S3 Standard. Create an S3 Lifecycle policy that moves objects that are more than 90 days old to S3 Glacier.

Store the files in Amazon S3 Standard. Create an S3 Lifecycle policy that moves objects that are more than 90 days old to S3 Standard-Infrequent Access (S3 Standard-IA).

Store the files in Amazon Elastic Block Store (Amazon EBS) volumes. Schedule snapshots of the volumes. Use the snapshots to archive data that is more than 90 days old.

Store the files in RAID-striped Amazon Elastic Block Store (Amazon EBS) volumes. Schedule snapshots of the volumes. Use the snapshots to archive data that is more than 90 days old.

Design Resilient Architectures Define Performant Architectures

Which storage and caching combination should be used for a web application with petabytes of data?

Single Choice

A solutions architect is designing the storage architecture for a new web application used for storing and viewing engineering drawings. All application components will be deployed on the AWS infrastructure.

The application design must support caching to minimize the amount of time that users wait for the engineering drawings to load. The application must be able to store petabytes of data. Which combination of storage and caching should the solutions architect use?

Amazon S3 with Amazon CloudFront

Amazon S3 Glacier with Amazon ElastiCache

Amazon Elastic Block Store (Amazon EBS) volumes with Amazon CloudFront

AWS Storage Gateway with Amazon ElastiCache

Design Resilient Architectures Define Performant Architectures

What solution meets the requirements of a multiple-subnet VPC architecture with specific access restrictions?

Single Choice

A solutions architect is developing a multiple-subnet VPC architecture. The solution will consist of six subnets in two Availability Zones. The subnets are defined as public, private and dedicated for databases. Only the Amazon EC2 instances running in the private subnets should be able to access a database.

Which solution meets these requirements?

Create a now route table that excludes the route to the public subnets CIDR blocks. Associate the route table to the database subnets.

Create a security group that denies ingress from the security group used by instances in the public subnets. Attach the security group to an Amazon RDS DB instance.

Create a security group that allows ingress from the security group used by instances in the private subnets. Attach the security group to an Amazon RDS DB instance.

Create a new peering connection between the public subnets and the private subnets. Create a different peering connection between the private subnets and the database subnets.

Specify Secure Applications and Architectures

What solution meets the requirements for a multiple-subnet VPC architecture with specific access restrictions?

Single Choice

Create a now route table that excludes the route to the public subnets CIDR blocks. Associate the route table to the database subnets.

Create a security group that denies ingress from the security group used by instances in the public subnets. Attach the security group to an Amazon RDS DB instance.

Create a security group that allows ingress from the security group used by instances in the private subnets. Attach the security group to an Amazon RDS DB instance.

Create a new peering connection between the public subnets and the private subnets. Create a different peering connection between the private subnets and the database subnets.

Specify Secure Applications and Architectures

Which AWS database solution is highly resilient and capable of automatically scaling read and write capacity?

Single Choice

A solutions architect is helping a developer design a new ecommerce shopping cart application using AWS services. The developer is unsure of the current database schema and expects to make changes as the ecommerce site grows. The solution needs to be highly resilient and capable of automatically scaling read and write capacity.

Which database solution meets these requirements?

Amazon Aurora PostgreSQL

Amazon DynamoDB with on-demand enabled

Amazon DynamoDB with DynamoDB Streams enabled

Amazon SQS and Amazon Aurora PostgreSQL

Design Resilient Architectures Define Performant Architectures

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Amazon (SAA-C03) Exam Questions And Answers page 61

How to ensure scalability of a web application running on AWS Fargate with ALB and Aurora?

Comments

How can a solutions architect ensure that the architecture supports distributed session data management?

Comments

What is the most cost-effective solution for hosting hundreds of machine learning models with high availability and low latency?

Comments

How should the solutions architect design the cloud architecture for a stateless application on AWS?

Correct Answer:

Explanation:

References:

Comments

What scalable solutions should be recommended for a cloud architecture that allows file interaction?

Comments

Which AWS solution meets the requirements for a scalable, durable cloud architecture for file storage?

Correct Answer:

Explanation:

References:

Comments

Which storage and caching combination should be used for a web application with petabytes of data?

Comments

What solution meets the requirements of a multiple-subnet VPC architecture with specific access restrictions?

Comments

What solution meets the requirements for a multiple-subnet VPC architecture with specific access restrictions?

Comments

Which AWS database solution is highly resilient and capable of automatically scaling read and write capacity?

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