Amazon SAA-C03 Online Practice Questions and Exam Preparation

Amazon SAA-C03 Online Questions & Answers

• Question 561:

  A retail company is building an order fulfillment system using a microservices architecture on AWS. The system must store incoming orders durably until processing completes successfully. Multiple teams' services process orders according to a defined workflow. Services must be scalable, loosely coupled, and able to handle sudden surges in order volume. The processing steps of each order must be centrally tracked.

  Which solution will meet these requirements?

  A. Send incoming orders to an Amazon Simple Notification Service (Amazon SNS) topic. Start an AWS Step Functions workflow for each order that orchestrates the microservices. Use AWS Lambda functions for each microservice.
  B. Send incoming orders to an Amazon Simple Queue Service (Amazon SQS) queue. Start an AWS Step Functions workflow for each order that orchestrates the microservices. Use AWS Lambda functions for each microservice.
  C. Send incoming orders to an Amazon Simple Queue Service (Amazon SQS) queue. Use Amazon EventBridge to distribute events among the microservices. Use AWS Lambda functions for each microservice.
  D. Send incoming orders to an Amazon Simple Notification Service (Amazon SNS) topic. Subscribe Amazon EventBridge to the topic to distribute events among the microservices. Use AWS Lambda functions for each microservice.
  B. Send incoming orders to an Amazon Simple Queue Service (Amazon SQS) queue. Start an AWS Step Functions workflow for each order that orchestrates the microservices. Use AWS Lambda functions for each microservice.

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  Explanation

  Durable storage of incoming orders with buffering and ability to handle surges is exactly what Amazon SQS is designed for. SQS provides highly durable, scalable queues that decouple producers from consumers.

  Centrally tracking workflow steps is a core use case of AWS Step Functions, which gives a visual workflow and state machine, tracks the state of each order, and can orchestrate calls to multiple microservices (in this case, Lambda functions).

  Combining SQS + Step Functions + Lambda gives:

  Durable queueing for orders (SQS).

  Loose coupling and surge handling (SQS decoupling + auto-scaling Lambda).

  Central orchestration and tracking of order-processing steps (Step Functions).

  Why the other options are not correct:

  Option A: SNS is a pub/sub service, not a durable work queue, and is not designed for "store-and-retry until processed" workloads in the same way SQS is.

  Option C: SQS + EventBridge provides decoupling but no central, stateful workflow tracking; EventBridge is event routing, not workflow orchestration.

  Option D: SNS + EventBridge still lacks durable order storage and explicit centralized workflow/state tracking.

• Question 562:

  A solutions architect is designing a system to be highly resilient. The system uses Amazon Route 53 with health checks and an Application Load Balancer (ALB). The system is critical and must have the highest availability possible.

  Which solution will meet these requirements?

  A. Automate failover to a healthy resource by automatically updating the value of the Route 53 A record.
  B. Configure the Route 53 health checks to perform a failover automatically.
  C. Automate failover to a healthy resource by updating the weight of the Route 53 weighted record.
  D. Create a new ALB during a failover event, and remap the target group to the new ALB.
  B. Configure the Route 53 health checks to perform a failover automatically.

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  Explanation

  Amazon Route 53 health checks can automatically perform DNS failover to healthy endpoints. When integrated with an Application Load Balancer, this provides a highly resilient system architecture that automatically routes traffic to healthy resources across Regions or endpoints.

  Why Option B is correct:

  Route 53 health checks automatically monitor endpoint health and switch to a healthy target when the primary endpoint fails.

  The failover process is automatic, with no manual updates to DNS records required.

  Combined with ALB's built-in multi-AZ resilience, this provides maximum availability.

  Why others are incorrect:

  Option A & Option C: Require manual DNS updates, which are not automatic and introduce latency.

  Option D: Creating new ALBs during failover increases downtime and is operationally inefficient.

  References:

  Amazon Route 53 Developer Guide?"Configuring DNS Failover"

  AWS Well-Architected Framework?Reliability Pillar

• Question 563:

  A company uses Amazon FSx for NetApp ONTAP in its primary AWS Region for CIFS and NFS file shares. Applications that run on Amazon EC2 instances access the file shares. The company needs a storage disaster recovery (DR) solution in a secondary Region. The data that is replicated in the secondary Region needs to be accessed by using the same protocols as the primary Region.

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

  A. Create an AWS Lambda function to copy the data to an Amazon S3 bucket. Replicate the S3 bucket to the secondary Region.
  B. Create a backup of the FSx for ONTAP volumes by using AWS Backup. Copy the volumes to the secondary Region. Create a new FSx for ONTAP instance from the backup.
  C. Create an FSx for ONTAP instance in the secondary Region. Use NetApp SnapMirror to replicate data from the primary Region to the secondary Region.
  D. Create an Amazon Elastic File System (Amazon EFS) volume. Migrate the current data to the volume. Replicate the volume to the secondary Region.
  C. Create an FSx for ONTAP instance in the secondary Region. Use NetApp SnapMirror to replicate data from the primary Region to the secondary Region.

• Question 564:

  A developer is creating an ecommerce workflow in an AWS Step Functions state machine that includes an HTTP Task state. The task passes shipping information and order details to an endpoint.

  The developer needs to test the workflow to confirm that the HTTP headers and body are correct and that the responses meet expectations.

  Which solution will meet these requirements?

  A. Use the TestState API to invoke only the HTTP Task. Set the inspection level to TRACE.
  B. Use the TestState API to invoke the state machine. Set the inspection level to DEBUG.
  C. Use the data flow simulator to invoke only the HTTP Task. View the request and response data.
  D. Change the log level of the state machine to ALL. Run the state machine.
  D. Change the log level of the state machine to ALL. Run the state machine.

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  Explanation

  State Machine Testing with Logs:

  Changing the log level to ALL enables capturing detailed request and response data. This helps verify HTTP headers, body, and responses.

  Incorrect Options Analysis:

  Option A and B: The TestState API is not a valid option for Step Functions.

  Option C: A data flow simulator does not exist for AWS Step Functions.

  References:

  Step Functions Logging and Monitoring

• Question 565:

  A company's application runs on Amazon EC2 instances behind an Application Load Balancer (ALB). The instances run in an Amazon EC2 Auto Scaling group across multiple Availability Zones. On the first day of every month at midnight, the application becomes much slower when the month-end financial calculation batch runs. This causes the CPU utilization of the EC2 instances to immediately peak to 100%, which disrupts the application.

  What should a solutions architect recommend to ensure the application is able to handle the workload and avoid downtime?

  A. Configure an Amazon CloudFront distribution in front of the ALB.
  B. Configure an EC2 Auto Scaling simple scaling policy based on CPU utilization.
  C. Configure an EC2 Auto Scaling scheduled scaling policy based on the monthly schedule.
  D. Configure Amazon ElastiCache to remove some of the workload from the EC2 instances.
  C. Configure an EC2 Auto Scaling scheduled scaling policy based on the monthly schedule.

• Question 566:

  A company wants to migrate an application to AWS. The company wants to increase the application's current availability. The company wants to use AWS WAF in the application's architecture.

  Which solution will meet these requirements?

  A. Create an Auto Scaling group that contains multiple Amazon EC2 instances that host the application across two Availability Zones. Configure an Application Load Balancer (ALB) and set the Auto Scaling group as the target. Connect a WAF to the ALB.
  B. Create a cluster placement group that contains multiple Amazon EC2 instances that hosts the application. Configure an Application Load Balancer and set the EC2 instances as the targets. Connect a WAF to the placement group.
  C. Create two Amazon EC2 instances that host the application across two Availability Zones. Configure the EC2 instances as the targets of an Application Load Balancer (ALB). Connect a WAF to the ALB.
  D. Create an Auto Scaling group that contains multiple Amazon EC2 instances that host the application across two Availability Zones. Configure an Application Load Balancer (ALB) and set the Auto Scaling group as the target. Connect a WAF to the Auto Scaling group.
  A. Create an Auto Scaling group that contains multiple Amazon EC2 instances that host the application across two Availability Zones. Configure an Application Load Balancer (ALB) and set the Auto Scaling group as the target. Connect a WAF to the ALB.

• Question 567:

  A company has established a new AWS account. The account is newly provisioned and no changes have been made to the default settings. The company is concerned about the security of the AWS account root user.

  What should be done to secure the root user?

  A. Create IAM users for daily administrative tasks. Disable the root user.
  B. Create IAM users for daily administrative tasks. Enable multi-factor authentication on the root user.
  C. Generate an access key for the root user. Use the access key for daily administration tasks instead of the AWS Management Console.
  D. Provide the root user credentials to the most senior solutions architect. Have the solutions architect use the root user for daily administration tasks.
  B. Create IAM users for daily administrative tasks. Enable multi-factor authentication on the root user.

• Question 568:

  A company recently created a disaster recovery site in a different AWS Region. The company needs to transfer large amounts of data back and forth between NFS file systems in the two Regions on a periodic basis.

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

  A. Use AWS DataSync.
  B. Use AWS Snowball devices.
  C. Set up an SFTP server on Amazon EC2.
  D. Use AWS Database Migration Service (AWS DMS).
  A. Use AWS DataSync.

• Question 569:

  A gaming company hosts a browser-based application on AWS. The users of the application consume a large number of videos and images that are stored in Amazon S3. This content is the same for all users.

  The application has increased in popularity, and millions of users worldwide accessing these media files.

  The company wants to provide the files to the users while reducing the load on the origin.

  Which solution meets these requirements MOST cost-effectively?

  A. Deploy an AWS Global Accelerator accelerator in front of the web servers.
  B. Deploy an Amazon CloudFront web distribution in front of the S3 bucket.
  C. Deploy an Amazon ElastiCache for Redis instance in front of the web servers.
  D. Deploy an Amazon ElastiCache for Memcached instance in front of the web servers.
  B. Deploy an Amazon CloudFront web distribution in front of the S3 bucket.

• Question 570:

  A company has created a multi-tier application for its ecommerce website. The website uses an Application Load Balancer that resides in the public subnets, a web tier in the public subnets, and a MySQL cluster hosted on Amazon EC2 instances in the private subnets. The MySQL database needs to retrieve product catalog and pricing information that is hosted on the internet by a third-party provider. A solutions architect must devise a strategy that maximizes security without increasing operational overhead.

  What should the solutions architect do to meet these requirements?

  A. Deploy a NAT instance in the VPC. Route all the internet-based traffic through the NAT instance.
  B. Deploy a NAT gateway in the public subnets. Modify the private subnet route table to direct all internet-bound traffic to the NAT gateway.
  C. Configure an internet gateway and attach it to the VPModify the private subnet route table to direct internet-bound traffic to the internet gateway.
  D. Configure a virtual private gateway and attach it to the VPC. Modify the private subnet route table to direct internet-bound traffic to the virtual private gateway.
  B. Deploy a NAT gateway in the public subnets. Modify the private subnet route table to direct all internet-bound traffic to the NAT gateway.