Amazon Amazon Certifications SAA-C03 Questions & Answers

• Question 511:

  A company needs to migrate a legacy application from an on-premises data center to the AWS Cloud because of hardware capacity constraints. The application runs 24 hours a day. and days a week,. The application database storage continues to grow over time.

  What should a solution architect do to meet these requirements MOST cost-affectivity?

  A. Migrate the application layer to Amazon FC2 Spot Instances. Migrate the data storage layer to Amazon S3.

  B. Migrate the application layer to Amazon EC2 Reserved Instances. Migrate the data storage layer to Amazon RDS On-Demand Instances.

  C. Migrate the application layer to Amazon EC2 Reserved instances. Migrate the data storage layer to Amazon Aurora Reserved Instances.

  D. Migrate the application layer to Amazon EC2 On Demand Amazon. Migrate the data storage layer to Amazon RDS Reserved instances.

  Correct Answer: C

  Amazon EC2 Reserved Instances allow for significant cost savings compared to On-Demand instances for long-running, steady-state workloads like this one. Reserved Instances provide a capacity reservation, so the instances are guaranteed to be available for the duration of the reservation period.

  Amazon Aurora is a highly scalable, cloud-native relational database service that is designed to be compatible with MySQL and PostgreSQL. It can automatically scale up to meet growing storage requirements, so it can accommodate the application's database storage needs over time. By using Reserved Instances for Aurora, the cost savings will be significant over the long term.

• Question 512:

  A company has an API that receives real-time data from a fleet of monitoring devices. The API stores this data in an Amazon RDS DB instance for later analysis. The amount of data that the monitoring devices send to the API fluctuates. During periods of heavy traffic, the API often returns timeout errors.

  After an inspection of the logs, the company determines that the database is not capable of processing the volume of write traffic that comes from the API. A solutions architect must minimize the number of connections to the database and

  must ensure that data is not lost during periods of heavy traffic.

  Which solution will meet these requirements?

  A. Increase the size of the DB instance to an instance type that has more available memory.

  B. Modify the DB instance to be a Multi-AZ DB instance. Configure the application to write to all active RDS DB instances.

  C. Modify the API to write incoming data to an Amazon Simple Queue Service (Amazon SQS) queue. Use an AWS Lambda function that Amazon SQS invokes to write data from the queue to the database.

  D. Modify the API to write incoming data to an Amazon Simple Notification Service (Amazon SNS) topic. Use an AWS Lambda function that Amazon SNS invokes to write data from the topic to the database.

  Correct Answer: C

  Using Amazon SQS will help minimize the number of connections to the database, as the API will write data to a queue instead of directly to the database. Additionally, using an AWS Lambda function that Amazon SQS invokes to write data from the queue to the database will help ensure that data is not lost during periods of heavy traffic, as the queue will serve as a buffer between the API and the database.

• Question 513:

  A company s order system sends requests from clients to Amazon EC2 instances The EC2 instances process the orders and men store the orders in a database on Amazon RDS Users report that they must reprocess orders when the system fails. The company wants a resilient solution that can process orders automatically it a system outage occurs.

  What should a solutions architect do to meet these requirements?

  A. Move (he EC2 Instances into an Auto Scaling group Create an Amazon EventBridge (Amazon CloudWatch Events) rule to target an Amazon Elastic Container Service (Amazon ECS) task

  B. Move the EC2 instances into an Auto Scaling group behind an Application Load Balancer (ALB) Update the order system to send messages to the ALB endpoint.

  C. Move the EC2 instances into an Auto Scaling group Configure the order system to send messages to an Amazon Simple Queue Service (Amazon SQS) queue Configure the EC2 instances to consume messages from the queue

  D. Create an Amazon Simple Notification Service (Amazon SNS) topic Create an AWS Lambda function, and subscribe the function to the SNS topic Configure the order system to send messages to the SNS topic Send a command to the EC2 instances to process the messages by using AWS Systems Manager Run Command

  Correct Answer: C

  To meet the company's requirements of having a resilient solution that can process orders automatically in case of a system outage, the solutions architect needs to implement a fault-tolerant architecture. Based on the given scenario, a potential solution is to move the EC2 instances into an Auto Scaling group and configure the order system to send messages to an Amazon Simple Queue Service (Amazon SQS) queue. The EC2 instances can then consume messages from the queue.

• Question 514:

  A company runs an application on Amazon EC2 Linux instances across multiple Availability Zones. The application needs a storage layer that is highly available and Portable Operating System Interface (POSIX) compliant. The storage layer must provide maximum data durability and must be shareable across the EC2 instances. The data in the storage layer will be accessed frequency for the first 30 days and will be accessed infrequently alter that time.

  Which solution will meet these requirements MOST cost-effectively?

  A. Use the Amazon S3 Standard storage class Create an S3 Lifecycle policy to move infrequently accessed data to S3 Glacier

  B. Use the Amazon S3 Standard storage class. Create an S3 Lifecycle policy to move infrequently accessed data to S3 Standard-Infrequent Access (EF3 Standard-IA).

  C. Use the Amazon Elastic File System (Amazon EFS) Standard storage class. Create a Lifecycle management policy to move infrequently accessed data to EFS Standard-Infrequent Access (EFS Standard-IA)

  D. Use the Amazon Elastic File System (Amazon EFS) One Zone storage class. Create a Lifecycle management policy to move infrequently accessed data to EFS One Zone-Infrequent Access (EFS One Zone-IA).

  Correct Answer: C

• Question 515:

  A company is experiencing sudden increases in demand. The company needs to provision large Amazon EC2 instances from an Amazon Machine image (AMI) The instances will run m an Auto Scaling group. The company needs a solution that provides minimum initialization latency to meet the demand.

  Which solution meets these requirements?

  A. Use the aws ec2 register-image command to create an AMI from a snapshot Use AWS Step Functions to replace the AMI in the Auto Scaling group

  B. Enable Amazon Elastic Block Store (Amazon EBS) fast snapshot restore on a snapshot Provision an AMI by using the snapshot Replace the AMI m the Auto Scaling group with the new AMI

  C. Enable AMI creation and define lifecycle rules in Amazon Data Lifecycle Manager (Amazon DLM) Create an AWS Lambda function that modifies the AMI in the Auto Scaling group

  D. Use Amazon EventBridge (Amazon CloudWatch Events) to invoke AWS Backup lifecycle policies that provision AMIs Configure Auto Scaling group capacity limits as an event source in EventBridge

  Correct Answer: B

  Enabling Amazon Elastic Block Store (Amazon EBS) fast snapshot restore on a snapshot allows you to quickly create a new Amazon Machine Image (AMI) from a snapshot, which can help reduce the initialization latency when provisioning new instances. Once the AMI is provisioned, you can replace the AMI in the Auto Scaling group with the new AMI. This will ensure that new instances are launched from the updated AMI and are able to meet the increased demand quickly.

• Question 516:

  A company has a regional subscription-based streaming service that runs in a single AWS Region. The architecture consists of web servers and application servers on Amazon EC2 instances. The EC2 instances are in Auto Scaling groups behind Elastic Load Balancers. The architecture includes an Amazon Aurora database cluster that extends across multiple Availability Zones.

  The company wants to expand globally and to ensure that its application has minimal downtime.

  A. Extend the Auto Scaling groups for the web tier and the application tier to deploy instances in Availability Zones in a second Region. Use an Aurora global database to deploy the database in the primary Region and the second Region. Use Amazon Route 53 health checks with a failover routing policy to the second Region.

  B. Deploy the web tier and the application tier to a second Region. Add an Aurora PostgreSQL cross-Region Aurara Replica in the second Region. Use Amazon Route 53 health checks with a failovers routing policy to the second Region, Promote the secondary to primary as needed.

  C. Deploy the web tier and the applicatin tier to a second Region. Create an Aurora PostSQL database in the second Region. Use AWS Database Migration Service (AWS DMS) to replicate the primary database to the second Region. Use Amazon Route 53 health checks with a failover routing policy to the second Region.

  D. Deploy the web tier and the application tier to a second Region. Use an Amazon Aurora global database to deploy the database in the primary Region and the second Region. Use Amazon Route 53 health checks with a failover routing policy to the second Region. Promote the secondary to primary as needed.

  Correct Answer: D

  Aws Aurora Global Database allows you to read and write from any region in the global cluster. This enables you to distribute read and write workloads globally, improving performance and reducing latency. Data is replicated synchronously across regions, ensuring strong consistency.

• Question 517:

  A company is developing an ecommerce application that will consist of a load-balanced front end, a container-based application, and a relational database. A solutions architect needs to create a highly available solution that operates with as little manual intervention as possible.

  Which solutions meet these requirements? (Select TWO.)

  A. Create an Amazon RDS DB instance in Multi-AZ mode.

  B. Create an Amazon RDS DB instance and one or more replicas in another Availability Zone.

  C. Create an Amazon EC2 in stance-based Docker cluster to handle the dynamic application load.

  D. Create an Amazon Elastic Container Service (Amazon ECS) cluster with a Fargate launch type to handle the dynamic application load.

  E. Create an Amazon Elastic Container Service (Amazon ECS) cluster with an Amazon EC2 launch type to handle the dynamic application load.

  Correct Answer: AD

  https://docs.aws.amazon.com/AmazonECS/latest/developerguide/Welcome.html

  1.

  Relational database: RDS

  2.

  Container-based applications: ECS

  "Amazon ECS enables you to launch and stop your container-based applications by using simple API calls. You can also retrieve the state of your cluster from a centralized service and have access to many familiar Amazon EC2 features."

  3.

  Little manual intervention: Fargate

  You can run your tasks and services on a serverless infrastructure that is managed by AWS Fargate. Alternatively, for more control over your infrastructure, you can run your tasks and services on a cluster of Amazon EC2 instances that you

  manage.

• Question 518:

  A solutions architect must migrate a Windows Internet Information Services (IIS) web application to AWS. The application currently relies on a file share hosted in the user's on-premises network-attached storage (NAS). The solutions architect has proposed migrating the IIS web servers to Amazon EC2 instances in multiple Availability Zones that are connected to the storage solution, and configuring an Elastic Load Balancer attached to the instances.

  Which replacement to the on-premises file share is MOST resilient and durable?

  A. Migrate the file share to Amazon RDS

  B. Migrate the file share to AWS Storage Gateway

  C. Migrate the file share to Amazon FSx for Windows File Server

  D. Migrate the file share to Amazon Elastic File System (Amazon EFS)

  Correct Answer: C

  The most resilient and durable replacement for the on-premises file share in this scenario would be Amazon FSx for Windows File Server.

  Amazon FSx is a fully managed Windows file system service that is built on Windows Server and provides native support for the SMB protocol. It is designed to be highly available and durable, with built-in backup and restore capabilities. It is also fully integrated with AWS security services, providing encryption at rest and in transit, and it can be configured to meet compliance standards.

• Question 519:

  A company has an application thai runs on several Amazon EC2 instances Each EC2 instance has multiple Amazon Elastic Block Store (Amazon EBS) data volumes attached to it The application's EC2 instance configuration and data need to be backed up nightly The application also needs to be recoverable in a different AWS Region

  Which solution will meet these requirements in the MOST operationally efficient way?

  A. Write an AWS Lambda function that schedules nightly snapshots of the application's EBS volumes and copies the snapshots to a different Region

  B. Create a backup plan by using AWS Backup to perform nightly backups. Copy the backups to another Region Add the application's EC2 instances as resources

  C. Create a backup plan by using AWS Backup to perform nightly backups Copy the backups to another Region Add the application's EBS volumes as resources

  D. Write an AWS Lambda function that schedules nightly snapshots of the application's EBS volumes and copies the snapshots to a different Availability Zone

  Correct Answer: B

  The most operationally efficient solution to meet these requirements would be to create a backup plan by using AWS Backup to perform nightly backups and copying the backups to another Region. Adding the application's EBS volumes as resources will ensure that the application's EC2 instance configuration and data are backed up, and copying the backups to another Region will ensure that the application is recoverable in a different AWS Region.

• Question 520:

  A company is deploying a two-tier web application in a VPC. The web tier is using an Amazon EC2 Auto Scaling group with public subnets that span multiple Availability Zones. The database tier consists of an Amazon RDS for MySQL DB instance in separate private subnets. The web tier requires access to the database to retrieve product information.

  The web application is not working as intended. The web application reports that it cannot connect to the database. The database is confirmed to be up and running. All configurations for the network ACLs. security groups, and route tables are still in their default states.

  What should a solutions architect recommend to fix the application?

  A. Add an explicit rule to the private subnet's network ACL to allow traffic from the web tier's EC2 instances.

  B. Add a route in the VPC route table to allow traffic between the web tier's EC2 instances and Ihe database tier.

  C. Deploy the web tier's EC2 instances and the database tier's RDS instance into two separate VPCs. and configure VPC peering.

  D. Add an inbound rule to the security group of the database tier's RDS instance to allow traffic from the web tier's security group.

  Correct Answer: D

  By default, all inbound traffic to an RDS instance is blocked. Therefore, an inbound rule needs to be added to the security group of the RDS instance to allow traffic from the security group of the web tier's EC2 instances.