1. A solutions architect is designing a new service behind Amazon API Gateway. The request patterns for the service will be unpredictable and can change suddenly from 0 requests to over 500 per second. The total size of the data that needs to be persisted in a database is currently less than 1 GB with unpredictable future growth. Data can be queried using simple key-value requests.Which combination of AWS services would meet these requirements? (Choose two.)(Select 2answers)

A) AWS Lambda
B) Amazon DynamoDB
C) MySQL-compatible Amazon Aurora
D) AWS Fargate
E) Amazon EC2 Auto Scaling


2. A web application is deployed in the AWS Cloud. It consists of a two-tier architecture that includes a web layer and a database layer. The web server is vulnerable to cross-site scripting (XSS) attacks.What should a solutions architect do to remediate the vulnerability?

A) Create a Classic Load Balancer. Put the web layer behind the load balancer and enable AWS WAF.
B) Create an Application Load Balancer. Put the web layer behind the load balancer and use AWS Shield Standard.
C) Create a Network Load Balancer. Put the web layer behind the load balancer and enable AWS WAF.
D) Create an Application Load Balancer. Put the web layer behind the load balancer and enable AWS WAF.



3. A company serves content to its subscribers across the world using an application running on AWS. The application has several Amazon C2 instances in a private subnet behind an Application Load Balancer (ALB). Due to a recent change in copyright restrictions, the chief information officer (CIO) wants to block access for certain countries.Which action will meet these requirements?

A) Modify the ALB security group to deny incoming traffic from blocked countries.
B) Use ALB listener rules to return access denied responses to incoming traffic from blocked countries.
C) Use Amazon CloudFront to serve the application and deny access to blocked countries.
D) Modify the security group for EC2 instances to deny incoming traffic from blocked countries.



4. A popular e-commerce application runs on AWS. The application encounters performance issues. The database is unable to handle the amount of queries and load during peak times. The database is running on the RDS Aurora engine on the largest instance size available.What should an administrator do to improve performance?

A) Convert the database to use EBS Provisioned IOPS.
B) Create a CloudFront distribution.
C) Create one or more read replicas.
D) Convert the database to Amazon Redshift.



5. An application runs on Amazon EC2 instances across multiple Availability Zones. The instances run in an Amazon EC2 Auto Scaling group behind an Application Load Balancer. The application performs best when the CPU utilization of the EC2 instances is at or near 40%.What should a solutions architect do to maintain the desired performance across all instances in the group?

A) Use scheduled scaling actions to scale up and scale down the Auto Scaling group.
B) Use an AWS Lambda function to update the desired Auto Scaling group capacity.
C) Use a simple scaling policy to dynamically scale the Auto Scaling group.
D) Use a target tracking policy to dynamically scale the Auto Scaling group.