AWS SAA-C02 (Q201-Q459)

A company hosts a training site on a fleet of Amazon EC2 instances. The company anticipates that its new course, which consists of dozens of training videos on the site, will be extremely popular when it is released in 1 week. What should a solutions architect do to minimize the anticipated server load?

• Store the videos in Amazon ElastiCache for Redis. Update the web servers to serve the videos using the Elastic ache API<br />
• Store the videos in Amazon Elastic File System (Amazon EFS).<br />Create a user data script for the web servers to mount the EFS volume.
• Store the videos in an Amazon S3 bucket. Create an Amazon CloudFlight distribution with an origin access identity (OAI) of that S3 bucket. Restrict Amazon S3 access to the OAI.
• Store the videos in an Amazon S3 bucket. Create an AWS Storage Gateway file gateway to access the S3 bucket. Create a user data script for the web servers to mount the file gateway.

A media company stores video content in an Amazon Elastic Block Store (Amazon EBS) volume. A certain video file has become popular and a large number of users across the world are accessing this content. This has resulted in a cost increase. Which action will DECREASE cost without compromising user accessibility?

• Change the EBS volume to Provisioned IOPS (PIOPS).
• Store the video in an Amazon S3 bucket and create an Amazon CloudFront distribution.
• Split the video into multiple, smaller segments so users are routed to the requested video segments only.
• Clear an Amazon S3 bucket in each Region and upload the videos so users are routed to the nearest S3 bucket.

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.

A company is hosting multiple websites for several lines of business under its registered parent domain. Users accessing these websites will be routed to appropriate backend Amazon EC2 instances based on the subdomain. The websites host static webpages, images, and server-side scripts like PHP and JavaScript. Some of the websites experience peak access during the first two hours of business with constant usage throughout the rest of the day. A solutions architect needs to design a solution that will automatically adjust capacity to these traffic patterns while keeping costs low. Which combination of AWS services or features will meet these requirements? (Choose two.)

• AWS Batch
• Network Load Balancer
• Application Load Balancer
• Amazon EC2 Auto Scaling
• Amazon S3 website hosting

A solutions architect is creating an application that will handle batch processing of large amounts of data. The input data will be held in Amazon S3 and the output data will be stored in a different S3 bucket. For processing, the application will transfer the data over the network between multiple Amazon EC2 instances. What should the solutions architect do to reduce the overall data transfer costs?

• Place all the EC2 instances in an Auto Scaling group.
• Place all the EC2 instances in the same AWS Region.
• Place all the EC2 instances in the same Availability Zone.
• Place all the EC2 instances in private subnets in multiple Availability Zones.

A company is hosting an election reporting website on AWS for users around the world. The website uses Amazon EC2 instances for the web and application tiers in an Auto Scaling group with Application Load Balancers. The database tier uses an Amazon RDS for MySQL database. The website is updated with election results once an hour and has historically observed hundreds of users accessing the reports. The company is expecting a significant increase in demand because of upcoming elections in different countries. A solutions architect must improve the website's ability to handle additional demand while minimizing the need for additional EC2 instances. Which solution will meet these requirements?

• Launch an Amazon ElastiCache cluster to cache common database queries.
• Launch an Amazon CloudFront web distribution to cache commonly requested website content.
• Enable disk-based caching on the EC2 instances to cache commonly requested website content.
• Deploy a reverse proxy into the design using an EC2 instance with caching enabled for commonly requested website content.

A company is running a three-tier web application to process credit card payments. The front-end user interface consists of static webpages. The application tier can have long-running processes. The database tier uses MySQL. The application is currently running on a single, general purpose large Amazon EC2 instance. A solutions architect needs to decouple the services to make the web application highly available. Which solution would provide the HIGHEST availability?

• Move static assets to Amazon CloudFront. Leave the application in EC2 in an Auto Scaling group. Move the database to Amazon RDS to deploy Multi-AZ.
• Move static assets and the application into a medium EC2 instance. Leave the database on the large instance. Place both instances in an Auto Scaling group.
• Move static assets to Amazon S3, Move the application to AWS Lambda with the concurrency limit set. Move the database to Amazon DynamoDB with on-demand enabled.
• Move static assets to Amazon S3. Move the application to Amazon Elastic Container Service (Amazon ECS) containers with Auto Scaling enabled. Move the database to Amazon RDS to deploy Multi-AZ.

A company operates an ecommerce website on Amazon EC2 instances behind an Application Load Balancer (ALB) in an Auto Scaling group. The site is experiencing performance issues related to a high request rate from illegitimate external systems with changing IP addresses. The security team is worried about potential DDoS attacks against the website. The company must block the illegitimate incoming requests in a way that has a minimal impact on legitimate users. What should a solutions architect recommend?

• Deploy Amazon Inspector and associate it with the ALB.
• Deploy AWS WAF, associate it with the ALB, and configure a rate-limiting rule.
• Deploy rules to the network ACLs associated with the ALB to block the incoming traffic.
• Deploy Amazon GuardDuty and enable rate-limiting protection when configuring GuardDuty.

A company is creating an architecture for a mobile app that requires minimal latency for its users. The company's architecture consists of Amazon EC2 instances behind an Application Load Balancer running in an Auto Scaling group. The EC2 instances connect to Amazon RDS. Application beta testing showed there was a slowdown when reading the data. However, the metrics indicate that the EC2 instances do not cross any CPU utilization thresholds. How can this issue be addressed?

• Reduce the threshold for CPU utilization in the Auto Scaling Group
• Replace the Application Load Balancer with a Network Load Balancer
• Add read replica for the RDS instances and direct read traffic to the replica
• Add Multi-AZ support to the RDS instances and direct read traffic to the new EC2 instance

A company is hosting its static website in an Amazon S3 bucket, which is the origin for Amazon CloudFront. The company has users in the United States, Canada, and Europe and wants to reduce. What should a solutions architect recommend?

• Adjust the CloudFront caching time to live (TTL) from the default to a longer timeframe
• Implement CloudFront events with Lambda@edge to run the website's data processing
• Modify the CloudFront price class to include only the locations of the countries that are served
• Implement a CloudFront Secure Socket Layer (SSL) certificate to push security closer to the locations of the countries that are served