A developer is troubleshooting a three-tier application, which is deployed on Amazon EC2 instances. There is a connectivity problem between the application servers and the database servers.
Which AWS services or tools should be used to identify the faulty component? (Select TWO.)

• A.AWS CloudTrail.
• B.AWS Config rules
• C.AWS Trusted Advisor
• D.Network access control lists
• E.Amazon VPC Flow Logs

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A company has a multi-tiered web application on AWS. During a recent spike in traffic, one of the primary relational databases on Amazon RDS could not serve all the traffic. Some read queries for repeatedly accessed items failed, so users received error messages.
What can be done to minimize the impact on database read queries MOST efficiently during future traffic spikes?

• A.Use Amazon S3 to cache database query results.
• B.Use local storage and memory on Amazon EC2 instances to cache data.
• C.Use Amazon ElastiCache in front of the primary database to cache data.
• D.Use Amazon RDS as a custom origin for Amazon CloudFront.

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A company is launching an ecommerce website and will host the static data in Amazon S3. The company expects approximately 1 000 transactions per second (TPS) for GET and PUT requests in total. Logging must be enabled to track all requests and must be retained for auditing purposes.
What is the MOST cost-effective solution?

• A.Enable AWS CloudTrail logging for the S3 bucket-level action and create a lifecycle policy to expire the data in 90 days
• B.Enable S3 server access logging and create a lifecycle policy to expire the data in 90 days
• C.Enable S3 server access logging and create a lifecycle policy to move the data to Amazon S3 Glacier in 90 days.
• D.Enable AWS CloudTrail logging for the S3 bucket-level action and create a lifecycle policy to move the data from the log bucket to Amazon S3 Glacier in 90 days

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Which code snippet below returns the URL of a load balanced web site created in CloudFormation with an AWS::ElasticLoadBalancing::LoadBalancer resource name "ElasticLoad Balancer"?

• A."Fn::Join" : ["". [ "http://", {"Fn::GetAtr" : [ "ElasticLoadBalancer","DNSName"]}]]
• B."Fn::Join" : ["". [ "http://", {"Fn::GetAtr" : [ "ElasticLoadBalancer","Url"]}]]
• C."Fn::Join" : ["". [ "http://", {"Ref" : "ElasticLoadBalancerUrl"}]]
• D."Fn::Join" : [".", [ "http://", {"Ref" : "ElasticLoadBalancerDNSName"}]]

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Which of the following items are required to allow an application deployed on an EC2 instance to write data to a DynamoDB table?
Assume that no security Keys are allowed to be stored on the EC2 instance. Choose 2 answers

• A.Create an IAM User that allows write access to the DynamoDB table.
• B.Add an IAM Role to a running EC2 instance.
• C.Add an IAM User to a running EC2 Instance.
• D.Launch an EC2 Instance with the IAM Role included in the launch configuration.
• E.Create an IAM Role that allows write access to the DynamoDB table.
• F.Launch an EC2 Instance with the IAM User included in the launch configuration.

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