A developer from your team has configured the load balancer to route traffic equally between instances or across Availability Zones.
However, Elastic Load Balancing (ELB) routes more traffic to one instance or Availability Zone than the others.
Why is this happening and how can it be fixed? (Select two) Sticky sessions are enabled for the load balancer Instances of a specific capacity type aren’t equally distributed across Availability Zones There could be short-lived TCP connections between clients and instances For Application Load Balancers, cross-zone load balancing is disabled by default After you disable an Availability Zone, the targets in that Availability Zone remain registered with the load balancer, thereby receiving random bursts of traffic.
A telecommunications company that provides internet service for mobile device users maintains over 100 c4.large instances in the us-east-1 region.
The EC2 instances run complex algorithms.
The manager would like to track CPU utilization of the EC2 instances as frequently as every 10 seconds.
Which of the following represents the BEST solution for the given use-case? Create a high-resolution custom metric and push the data using a script triggered every 10 seconds Enable EC2 detailed monitoring Simply get it from the CloudWatch Metrics Open a support ticket with AWS.
Your company hosts a static website on Amazon Simple Storage Service (S3) written in HTML5.
The website targets aviation enthusiasts and it has grown a worldwide audience with hundreds of thousands of visitors accessing the website now on a monthly basis.
While users in the United States have a great user experience, users from other parts of the world are experiencing slow responses and lag.
Which service can mitigate this issue? Use Amazon CloudFront Use Amazon ElastiCache for Redis Use Amazon S3 Caching Use Amazon S3 Transfer Acceleration.
You are creating a mobile application that needs access to the AWS API Gateway.
Users will need to register first before they can access your API and you would like the user management to be fully managed.
Which authentication option should you use for your API Gateway layer? Use Cognito User Pools Use Lambda Authorizer Use IAM permissions with sigv4 Use API Gateway User Pools.
Your web application reads and writes data to your DynamoDB table.
The table is provisioned with 400 Write Capacity Units (WCU’s) shared across 4 partitions.
One of the partitions receives 250 WCU/second while others receive much less. You receive the error 'ProvisionedThroughputExceededException'.
What is the likely cause of this error? You have a hot partition CloudWatch monitoring is lagging Configured IAM policy is wrong Write-capacity units (WCU’s) are applied across to all your DynamoDB tables and this needs reconfiguration.
As a Senior Developer, you manage 10 Amazon EC2 instances that make read-heavy database requests to the Amazon RDS for PostgreSQL.
You need to make this architecture resilient for disaster recovery.
Which of the following features will help you prepare for database disaster recovery? (Select two) Use cross-Region Read Replicas Enable the automated backup feature of Amazon RDS in a multi-AZ deployment that creates backups in a single AWS Region Enable the automated backup feature of Amazon RDS in a multi-AZ deployment that creates backups across multiple Regions Use RDS Provisioned IOPS (SSD) Storage in place of General Purpose (SSD) Storage Use database cloning feature of the RDS DB cluster.
A team is checking the viability of using AWS Step Functions for creating a banking workflow for loan approvals.
The web application will also have human approval as one of the steps in the workflow.
As a developer associate, which of the following would you identify as the key characteristics for AWS Step Function? (Select two) Standard Workflows on AWS Step Functions are suitable for long-running, durable, and auditable workflows that can also support any human approval steps You should use Express Workflows for workloads with high event rates and short duration Standard Workflows on AWS Step Functions are suitable for long-running, durable, and auditable workflows that do not support any human approval steps Express Workflows have a maximum duration of five minutes and Standard workflows have a maximum duration of 180 days or 6 months Both Standard and Express Workflows support all service integrations, activities, and design patterns.
A company uses Amazon RDS as its database.
For improved user experience, it has been decided that a highly reliable fully-managed caching layer has to be configured in front of RDS.
Which of the following is the right choice, keeping in mind that cache content regeneration is a costly activity? Implement Amazon ElastiCache Redis in Cluster-Mode Install Redis on an Amazon EC2 instance Implement Amazon ElastiCache Memcached Migrate the database to Amazon Redshift.
An IT company has its serverless stack integrated with AWS X-Ray.
The developer at the company has noticed a high volume of data going into X-Ray and the AWS monthly usage charges have skyrocketed as a result.
The developer has requested changes to mitigate the issue.
As a Developer Associate, which of the following solutions would you recommend to obtain tracing trends while reducing costs with minimal disruption? Enable X-Ray sampling Use Filter Expressions in the X-Ray console Custom configuration for the X-Ray agents Implement a network sampling rule.
A company follows collaborative development practices.
The engineering manager wants to isolate the development effort by setting up simulations of API components owned by various development teams.
Which API integration type is best suited for this requirement? MOCK AWS_PROXY HTTP_PROXY HTTP.
A HealthCare mobile app uses proprietary Machine Learning algorithms to provide early diagnosis using patient health metrics.
To protect this sensitive data, the development team wants to transition to a scalable user management system with log-in/sign-up functionality that also supports Multi-Factor Authentication (MFA)
Which of the following options can be used to implement a solution with the LEAST amount of development effort? (Select two) Use Amazon Cognito for user-management and facilitating the log-in/sign-up process Use Amazon Cognito to enable Multi-Factor Authentication (MFA) when users log-in Use Lambda functions and DynamoDB to create a custom solution for user management Use Lambda functions and RDS to create a custom solution for user management Use Amazon SNS to send Multi-Factor Authentication (MFA) code via SMS to mobile app users.
Your company has a three-year contract with a healthcare provider.
The contract states that monthly database backups must be retained for the duration of the contract for compliance purposes.
Currently, the limit on backup retention for automated backups, on Amazon Relational Database Service (RDS), does not meet your requirements.
Which of the following solutions can help you meet your requirements? Create a cron event in CloudWatch, which triggers an AWS Lambda function that triggers the database snapshot Enable RDS automatic backups Enable RDS Read replicas Enable RDS Multi-AZ.
You are working for a shipping company that is automating the creation of ECS clusters with an Auto Scaling Group using an AWS CloudFormation template that accepts cluster name as its parameters.
Initially, you launch the template with input value 'MainCluster', which deployed five instances across two availability zones.
The second time, you launch the template with an input value 'SecondCluster'.
However, the instances created in the second run were also launched in 'MainCluster' even after specifying a different cluster name.
What is the root cause of this issue? The cluster name Parameter has not been updated in the file /etc/ecs/ecs.config during bootstrap The EC2 instance is missing IAM permissions to join the other clusters The ECS agent Docker image must be re-built to connect to the other clusters The security groups on the EC2 instance are pointing to the wrong ECS cluster.
A telecom service provider stores its critical customer data on Amazon Simple Storage Service (Amazon S3).
Which of the following options can be used to control access to data stored on Amazon S3? (Select two) Bucket policies, Identity and Access Management (IAM) policies Query String Authentication, Access Control Lists (ACLs) Permissions boundaries, Identity and Access Management (IAM) policies Query String Authentication, Permissions boundaries IAM database authentication, Bucket policies.
A leading financial services company offers data aggregation services for Wall Street trading firms.
The company bills its clients based on per unit of clickstream data provided to the clients.
As the company operates in a regulated industry, it needs to have the same ordered clickstream data available for auditing within a window of 7 days.
As a Developer Associate, which of the following AWS services do you think provides the ability to run the billing process and auditing process on the given clickstream data in the same order? AWS Kinesis Data Streams AWS Kinesis Data Firehose AWS Kinesis Data Analytics Amazon SQS.
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