Free Amazon SAA-C03 Practice Exams - Page 2 of 46

Question #11

A solutions architect is designing a multi-tier application for a company. The application’s users upload images from a mobile device. The application generates a thumbnail of each image and returns a message to the user to confirm that the image was uploaded successfully.

The thumbnail generation can take up to 60 seconds, but the company wants to provide a faster response time to its users to notify them that the original image was received. The solutions architect must design the application to asynchronously dispatch requests to the different application tiers.

What should the solutions architect do to meet these requirements?

A . Write a custom AWS Lambda function to generate the thumbnail and alert the user. Use the image upload process as an event source to invoke the Lambda function.
B . Create an AWS Step Functions workflow Configure Step Functions to handle the orchestration between the application tiers and alert the user when thumbnail generation is complete
C . Create an Amazon Simple Queue Service (Amazon SQS) message queue. As images are uploaded, place a message on the SQS queue for thumbnail generation. Alert the user through an application message that the image was received
D . Create Amazon Simple Notification Service (Amazon SNS) notification topics and subscriptions Use one subscription with the application to generate the thumbnail after the image upload is complete. Use a second subscription to message the user’s mobile app by way of a push notification after thumbnail generation is complete.

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Correct Answer: C
C

Explanation:

This option is the most efficient because it uses Amazon SQS, which is a fully managed message queuing service that lets you send, store, and receive messages between software components at any volume, without losing messages or requiring other services to be available1. It also uses an SQS message queue to asynchronously dispatch requests to the different application tiers, which decouples the image upload process from the thumbnail generation process and enables scalability and reliability. It also alerts the user through an application message that the image was received, which provides a faster response time to the user than waiting for the thumbnail generation to complete.

Option A is less efficient because it uses a custom AWS Lambda function to generate the thumbnail and alert the user, which is a way to run code without provisioning or managing servers. However, this does not use an asynchronous dispatch mechanism to separate the image upload process from the thumbnail generation process. It also uses the image upload process as an event source to invoke the Lambda function, which could cause concurrency issues if there are many images uploaded at once.

Option B is less efficient because it uses AWS Step Functions, which is a fully managed service that provides a graphical console to arrange and visualize the components of your application as a series of steps2. However, this does not use an asynchronous dispatch mechanism to separate the image upload process from the thumbnail generation process. It also uses Step Functions to handle the orchestration between the application tiers and alert the user when thumbnail generation is complete, which could introduce additional complexity and latency.

Option D is less efficient because it uses Amazon SNS, which is a fully managed messaging service that enables you to send messages or notifications directly to users with SMS text messages or email3. However, this does not use an asynchronous dispatch mechanism to separate the image upload process from the thumbnail generation process. It also uses SNS notification topics and subscriptions to generate the thumbnail after the image upload is complete and message the user’s mobile app by way of a push notification after thumbnail generation is complete, which could introduce additional complexity and latency.

Question #12

A company recently started using Amazon Aurora as the data store for its global ecommerce application When large reports are run developers report that the ecommerce application is performing poorly After reviewing metrics in Amazon CloudWatch, a solutions architect finds that the ReadlOPS and CPU Utilization metrics are spiking when monthly reports run.

What is the MOST cost-effective solution?

A . Migrate the monthly reporting to Amazon Redshift.
B . Migrate the monthly reporting to an Aurora Replica
C . Migrate the Aurora database to a larger instance class
D . Increase the Provisioned IOPS on the Aurora instance

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Question #13

A company stores multiple Amazon Machine Images (AMIs) in an AWS account to launch its Amazon EC2 instances. The AMIs contain critical data and configurations that are necessary for the company’s operations. The company wants to implement a solution that will recover accidentally deleted AMIs quickly and efficiently.

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

A . Create Amazon Elastic Block Store (Amazon EBS) snapshots of the AMIs. Store the snapshots in a separate AWS account.
B . Copy all AMIs to another AWS account periodically.
C . Create a retention rule in Recycle Bin.
D . Upload the AMIs to an Amazon S3 bucket that has Cross-Region Replication.

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Question #14

A company is hosting a high-traffic static website on Amazon S3 with an Amazon CloudFront distribution that has a default TTL of 0 seconds. The company wants to implement caching to improve performance for the website However, the company also wants to ensure that stale content Is not served for more than a few minutes after a deployment

Which combination of caching methods should a solutions architect implement to meet these requirements? (Select TWO.)

A . Set the CloudFront default TTL to 2 minutes.
B . Set a default TTL of 2 minutes on the S3 bucket
C . Add a Cache-Control private directive to the objects in Amazon S3.
D . Create an AWS Lambda@Edge function to add an Expires header to HTTP responses Configure the function to run on viewer response.
E . Add a Cache-Control max-age directive of 24 hours to the objects in Amazon S3. On deployment, create a CloudFront invalidation to clear any changed files from edge caches

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Question #15

A company’s software development team needs an Amazon RDS Multi-AZ cluster. The RDS cluster will serve as a backend for a desktop client that is deployed on premises. The desktop client requires direct connectivity to the RDS cluster.

The company must give the development team the ability to connect to the cluster by using the client when the team is in the office.

Which solution provides the required connectivity MOST securely?

A . Create a VPC and two public subnets. Create the RDS cluster in the public subnets. Use AWS Site-
to-Site VPN with a customer gateway in the company’s office.
B . Create a VPC and two private subnets. Create the RDS cluster in the private subnets. Use AWS Site-to-Site VPN with a customer gateway in the company’s office.
C . Create a VPC and two private subnets. Create the RDS cluster in the private subnets. Use RDS security groups to allow the company’s office IP ranges to access the cluster.
D . Create a VPC and two public subnets. Create the RDS cluster in the public subnets. Create a cluster user for each developer. Use RDS security groups to allow the users to access the cluster.

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Question #16

An image hosting company uploads its large assets to Amazon S3 Standard buckets. The company uses multipart upload in parallel by using S3 APIs and overwrites if the same object is uploaded again. For the first 30 days after upload, the objects will be accessed frequently. The objects will be used less frequently after 30 days, but the access patterns for each object will be inconsistent. The company must optimize its S3 storage costs while maintaining high availability and resiliency of stored assets.

Which combination of actions should a solutions architect recommend to meet these requirements? (Select TWO.)

A . Move assets to S3 Intelligent-Tiering after 30 days.
B . Configure an S3 Lifecycle policy to clean up incomplete multipart uploads.
C . Configure an S3 Lifecycle policy to clean up expired object delete markers.
D . Move assets to S3 Standard-Infrequent Access (S3 Standard-IA) after 30 days
E . Move assets to S3 One Zone-Infrequent Access (S3 One Zone-IA) after 30 days.

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Correct Answer: AB
AB

Explanation:

S3 Intelligent-Tiering is a storage class that automatically moves data to the most cost-effective access tier based on access frequency, without performance impact, retrieval fees, or operational overhead1. It is ideal for data with unknown or changing access patterns, such as the company’s assets. By moving assets to S3 Intelligent-Tiering after 30 days, the company can optimize its storage costs while maintaining high availability and resilience of stored assets.

S3 Lifecycle is a feature that enables you to manage your objects so that they are stored cost effectively throughout their lifecycle2. You can create lifecycle rules to define actions that Amazon S3 applies to a group of objects. One of the actions is to abort incomplete multipart uploads that can occur when an upload is interrupted. By configuring an S3 Lifecycle policy to clean up incomplete multipart uploads, the company can reduce its storage costs and avoid paying for parts that are not used.

Option C is incorrect because expired object delete markers are automatically deleted by Amazon S3 and do not incur any storage costs3. Therefore, configuring an S3 Lifecycle policy to clean up expired object delete markers will not have any effect on the company’s storage costs.

Option D is incorrect because S3 Standard-IA is a storage class for data that is accessed less frequently, but requires rapid access when needed1. It has a lower storage cost than S3 Standard, but it has a higher retrieval cost and a minimum storage duration charge of 30 days. Therefore, moving assets to S3 Standard-IA after 30 days may not optimize the company’s storage costs if the assets are still accessed occasionally.

Option E is incorrect because S3 One Zone-IA is a storage class for data that is accessed less

frequently, but requires rapid access when needed1. It has a lower storage cost than S3 Standard-IA,

but it stores data in only one Availability Zone and has less resilience than other storage classes. It

also has a higher retrieval cost and a minimum storage duration charge of 30 days. Therefore, moving

assets to S3 One Zone-IA after 30 days may not optimize the company’s storage costs if the assets are

still accessed occasionally or require high availability. Reference URL: 1:

https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html 2:

https://docs.aws.amazon.com/AmazonS3/latest/userguide/object-lifecycle-mgmt.html 3:

https://docs.aws.amazon.com/AmazonS3/latest/userguide/delete-or-empty-bucket.html#delete-bucket-considerations:

https://docs.aws.amazon.com/AmazonS3/latest/userguide/mpuoverview.html:

https://aws.amazon.com/certification/certified-solutions-architect-associate/

Question #17

A company needs to store data in Amazon S3 and must prevent the data from being changed. The company wants new objects that are uploaded to Amazon S3 to remain unchangeable for a nonspecific amount of time until the company decides to modify the objects. Only specific users in the company’s AWS account can have the ability to delete the objects.

What should a solutions architect do to meet these requirements?

A . Create an S3 Glacier vault Apply a write-once, read-many (WORM) vault lock policy to the objects
B . Create an S3 bucket with S3 Object Lock enabled Enable versioning Set a retention period of 100 years Use governance mode as the S3 bucket’s default retention mode for new objects
C . Create an S3 bucket Use AWS CloudTrail to (rack any S3 API events that modify the objects Upon notification, restore the modified objects from any backup versions that the company has
D . Create an S3 bucket with S3 Object Lock enabled Enable versioning Add a legal hold to the objects Add the s3 PutObjectLegalHold permission to the IAM policies of users who need to delete the objects

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Question #18

A company will deployed a web application on AWS. The company hosts the backend database on Amazon RDS for MySQL with a primary DB instance and five read replicas to support scaling needs. The read replicas must log no more than 1 second bahind the primary DB Instance. The database routinely runs scheduled stored procedures.

As traffic on the website increases, the replicas experinces addtional lag during periods of peak lead. A solutions architect must reduce the replication lag as much as possible. The solutions architect must minimize changes to the applicatin code and must minimize ongoing overhead.

Which solution will meet these requirements?

Migrate the database to Amazon Aurora MySQL. Replace the read replicas with Aurora Replicas, and configure Aurora Auto Scaling. Replace the stored procedures with Aurora MySQL native functions.

Deploy an Amazon ElasticCache for Redis cluser in front of the database. Modify the application to check the cache before the application queries the database. Repace the stored procedures with AWS Lambda funcions.

A . Migrate the database to a MYSQL database that runs on Amazn EC2 instances. Choose large, compute optimized for all replica nodes. Maintain the stored procedures on the EC2 instances.
B . Deploy an Amazon ElastiCache for Redis cluster in fornt of the database. Modify the application to check the cache before the application queries the database. Replace the stored procedures with AWS Lambda functions.
C . Migrate the database to a MySQL database that runs on Amazon EC2 instances. Choose large, compute optimized EC2 instances for all replica nodes, Maintain the stored procedures on the EC2 instances.
D . Migrate the database to Amazon DynamoDB, Provision number of read capacity units (RCUs) to support the required throughput, and configure on-demand capacity scaling. Replace the stored procedures with DynamoDB streams.

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Question #19

A company wants to move a multi-tiered application from on premises to the AWS Cloud to improve the application’s performance. The application consists of application tiers that communicate with each other by way of RESTful services. Transactions are dropped when one tier becomes overloaded. A solutions architect must design a solution that resolves these issues and modernizes the application.

Which solution meets these requirements and is the MOST operationally efficient?

A . Use Amazon API Gateway and direct transactions to the AWS Lambda functions as the application layer. Use Amazon Simple Queue Service (Amazon SQS) as the communication layer between application services.
B . Use Amazon CloudWatch metrics to analyze the application performance history to determine the server’s peak utilization during the performance failures. Increase the size of the application server’s Amazon EC2 instances to meet the peak requirements.
C . Use Amazon Simple Notification Service (Amazon SNS) to handle the messaging between application servers running on Amazon EC2 in an Auto Scaling group. Use Amazon CloudWatch to monitor the SNS queue length and scale up and down as required.
D . Use Amazon Simple Queue Service (Amazon SQS) to handle the messaging between application servers running on Amazon EC2 in an Auto Scaling group. Use Amazon CloudWatch to monitor the SQS queue length and scale up when communication failures are detected.

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Question #20

A company provides an API to its users that automates inquiries for tax computations based on item prices. The company experiences a larger number of inquiries during the holiday season only that cause slower response times. A solutions architect needs to design a solution that is scalable and elastic.

What should the solutions architect do to accomplish this?

A . Provide an API hosted on an Amazon EC2 instance. The EC2 instance performs the required
computations when the API request is made.
B . Design a REST API using Amazon API Gateway that accepts the item names. API Gateway passes item names to AWS Lambda for tax computations.
C . Create an Application Load Balancer that has two Amazon EC2 instances behind it. The EC2 instances will compute the tax on the received item names.
D . Design a REST API using Amazon API Gateway that connects with an API hosted on an Amazon EC2 instance. API Gateway accepts and passes the item names to the EC2 instance for tax computations.

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