AWS DVA-C01 :: Practice Exam7

Your team has just signed up an year-long contract with a client maintaining a three-tier web application, that needs to be moved to AWS Cloud. The application has steady traffic throughout the day and needs to be on a reliable system with no down-time or access issues. The solution needs to be cost-optimal for this startup. Which of the following options should you choose?. Amazon EC2 Reserved Instances. Amazon EC2 Spot Instances. Amazon EC2 On-Demand Instances. On-premise EC2 instance.

A data analytics company wants to use clickstream data for Machine Learning tasks, develop algorithms, and create visualizations and dashboards to support the business stakeholders. Each of these business units works independently and would need real-time access to this clickstream data for their applications. As a Developer Associate, which of the following AWS services would you recommend such that it provides a highly available and fault-tolerant solution to capture the clickstream events from the source and then provide a simultaneous feed of the data stream to the consumer applications?. AWS Kinesis Data Streams. AWS Kinesis Data Firehose. AWS Kinesis Data Analytics. Amazon SQS.

The development team at a retail organization wants to allow a Lambda function in its AWS Account A to access a DynamoDB table in another AWS Account B. As a Developer Associate, which of the following solutions would you recommend for the given use-case?. Create an IAM role in account B with access to DynamoDB. Modify the trust policy of the role in Account B to allow the execution role of Lambda to assume this role. Update the Lambda function code to add the AssumeRole API call. Create a clone of the Lambda function in AWS Account B so that it can access the DynamoDB table in the same account. Add a resource policy to the DynamoDB table in AWS Account B to give access to the Lambda function in Account A. Create an IAM role in Account B with access to DynamoDB. Modify the trust policy of the execution role in Account A to allow the execution role of Lambda to assume the IAM role in Account B. Update the Lambda function code to add the AssumeRole API call.

A cyber forensics application, running behind an ALB, wants to analyze patterns for the client IPs. Which of the following headers can be used for this requirement?. X-Forwarded-For. X-Forwarded-Proto. X-Forwarded-Port. X-Forwarded-IP.

You are a DynamoDB developer for an aerospace company that requires you to write 6 objects per second of 4.5KB in size each. What write capacity unit is needed for your project?. 15. 30. 24. 46.

A security company is requiring all developers to perform server-side encryption with customer-provided encryption keys when performing operations in AWS S3. Developers should write software with C# using the AWS SDK and implement the requirement in the PUT, GET, Head, and Copy operations. Which of the following encryption methods meets this requirement?. SSE-C. SSE-KMS. Client-Side Encryption. SSE-S3.

You are a developer handling a deployment service that automates application deployments to Amazon EC2 instances. Most of the deployments consist of code, but sometimes web and configuration files. One of your deployments failed and was rolled back by AWS CodeDeploy to the last known good application revision. During rollback which of the following instances did AWS CodeDeploy deploy first to?. To the failed instances. To the non-failed instances. To new instances. You cannot rollback a CodeDeploy deployment.

An organization with online transaction processing (OLTP) workloads have successfully moved to DynamoDB after having many issues with traditional database systems. However, a few months into production, DynamoDB tables are consistently recording high latency. As a Developer Associate, which of the following would you suggest to reduce the latency? (Select two). Consider using Global tables if your application is accessed by globally distributed users. Use eventually consistent reads in place of strongly consistent reads whenever possible. Increase the request timeout settings, so the client gets enough time to complete the requests, thereby reducing retries on the system. Reduce connection pooling, which keeps the connections alive even when user requests are not present, thereby, blocking the services. Use DynamoDB Accelerator (DAX) for businesses with heavy write-only workloads.

You are responsible for an application that runs on multiple Amazon EC2 instances. In front of the instances is an Internet-facing load balancer that takes requests from clients over the internet and distributes them to the EC2 instances. A health check is configured to ping the index.html page found in the root directory for the health status. When accessing the website via the internet visitors of the website receive timeout errors. What should be checked first to resolve the issue?. Security Groups. IAM Roles. The application is down. The ALB is warming up.

An IT company uses AWS CloudFormation templates to provision their AWS infrastructure for Amazon EC2, Amazon VPC, and Amazon S3 resources. Using cross-stack referencing, a developer creates a stack called NetworkStack which will export the subnetId that can be used when creating EC2 instances in another stack. To use the exported value in another stack, which of the following functions must be used?. !ImportValue. !Ref. !GetAtt. !Sub.

Your company has been hired to build a resilient mobile voting app for an upcoming music award show that expects to have 5 to 20 million viewers. The mobile voting app will be marketed heavily months in advance so you are expected to handle millions of messages in the system. You are configuring Amazon Simple Queue Service (SQS) queues for your architecture that should receive messages from 20 KB to 200 KB. Is it possible to send these messages to SQS?. Yes, the max message size is 256KB. Yes, the max message size is 512KB. No, the max message size is 128KB. No, the max message size is 64KB.

You are working with a t2.small instance bastion host that has the AWS CLI installed to help manage all the AWS services installed on it. You would like to know the security group and the instance id of the current instance. Which of the following will help you fetch the needed information?. Query the metadata at http://169.254.169.254/latest/meta-data. Create an IAM role and attach it to your EC2 instance that helps you perform a 'describe' API call. Query the user data at http://169.254.169.254/latest/user-data. Query the user data at http://254.169.254.169/latest/meta-data.

A startup manages its Cloud resources with Elastic Beanstalk. The environment consists of few Amazon EC2 instances, an Auto Scaling Group (ASG), and an Elastic Load Balancer. Even after the Load Balancer marked an EC2 instance as unhealthy, the ASG has not replaced it with a healthy instance. As a Developer, suggest the necessary configurations to automate the replacement of unhealthy instance. The health check type of your instance's Auto Scaling group, must be changed from EC2 to ELB by using a configuration file. Health check parameters were configured for checking the instance health alone. The instance failed because of application failure which was not configured as a parameter for health check status. Auto Scaling group doesn't automatically replace the unhealthy instances marked by the load balancer. They have to be manually replaced from AWS Console. The ping path field of the Load Balancer is configured incorrectly.

The development team at an e-commerce company wants to run a serverless data store service on two docker containers using shared memory. Which of the following ECS configurations can be used to facilitate this use-case?. Put the two containers into a single task definition using a Fargate Launch Type. Put the two containers into two separate task definitions using a Fargate Launch Type. Put the two containers into two separate task definitions using an EC2 Launch Type. Put the two containers into a single task definition using an EC2 Launch Type.

A firm runs its technology operations on a fleet of Amazon EC2 instances. The firm needs a certain software to be available on the instances to support their daily workflows. The developer team has been told to use the user data feature of EC2 instances. Which of the following are true about the user data EC2 configuration? ( Select two). By default, scripts entered as user data are executed with root user privileges. By default, user data runs only during the boot cycle when you first launch an instance. By default, user data is executed every time an EC2 instance is re-started. When an instance is running, you can update user data by using root user credentials. By default, scripts entered as user data do not have root user privileges for executing.