Amazon DOP-C02 Practice Questions

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Question 281

Your current log analysis application takes more than four hours to generate a report of the top 10 users of your web application. You have been asked to implement a system that can report this information in real time, ensure that the report is always up to date, and handle increases in the number of requests to your web application.

Choose the option that is cost-effective and can fulfill the requirements.

A. Publish your data to CloudWatch Logs, and configure your application to autoscale to handle the load on demand.

B. Publish your log data to an Amazon S3 bucket. Use AWS CloudFormation to create an Auto Scaling group to scale your post-processing application which is configured to pull down your log files stored an Amazon S3.

C. Post your log data to an Amazon Kinesis data stream, and subscribe your log-processing application so that is configured to process your logging data.

D. Configure an Auto Scaling group to increase the size of your Amazon EMR duster.

E. Create a multi-AZ Amazon RDS MySQL cluster, post the logging data to MySQL, and run a map reduce job to retrieve the required information on user counts.

Question 282

Choose the option that is cost-effective and can fulfill the requirements.

A. Use a "Container command" within an Elastic Beanstalk configuration file to execute the script, ensuring that the "leader only" flag is set to true.

B. Make use of the Amazon EC2 metadata service to query whether the instance is marked as the leader" in the Auto Scaling group. Only execute the script if "true" is returned.

C. Use a "Solo Command" within an Elastic Beanstalk configuration file to execute the script. The Elastic Beanstalk service will ensure that the command is only executed once.

D. Update the Amazon RDS security group to only allow write access from a single instance in the Auto Scaling group; that way, only one instance will successfully execute the script on the database.

Question 283

You are administering a continuous integration application that polls version control for changes and then launches new Amazon EC2 instances for a full suite of build tests. What should you do to ensure the lowest overall cost while being able to run as many tests in parallel as possible?

A. Perform syntax checking on the continuous integration system before launching a new Amazon EC2 instance for build test, unit and integration tests.

B. Perform syntax and build tests on the continuous integration system before launching the new Amazon EC2 instance unit and integration tests.

C. Perform all tests on the continuous integration system, using AWS OpsWorks for unit, integration, and build tests.

D. Perform syntax checking on the continuous integration system before launching a new AWS Data Pipeline for coordinating the output of unit, integration, and build tests.

Question 284

You are doing a load testing exercise on your application hosted on AWS. While testing your Amazon RDS MySQL DB instance, you notice that when you hit 100% CPU utilization on it, your application becomes non- responsive. Your application is read-heavy.

What are methods to scale your data tier to meet the application's needs? (Choose three.)

Select all that apply

A. Add Amazon RDS DB read replicas, and have your application direct read queries to them.

B. Add your Amazon RDS DB instance to an Auto Scaling group and configure your CloudWatch metric based on CPU utilization.

C. Use an Amazon SQS queue to throttle data going to the Amazon RDS DB instance.

D. Use ElastiCache in front of your Amazon RDS DB to cache common queries.

E. Shard your data set among multiple Amazon RDS DB instances.

F. Enable Multi-AZ for your Amazon RDS DB instance.

Question 285

Your mobile application includes a photo-sharing service that is expecting tens of thousands of users at launch. You will leverage Amazon Simple Storage Service (S3) for storage of the user Images, and you must decide how to authenticate and authorize your users for access to these images. You also need to manage the storage of these images.

Which two of the following approaches should you use? (Choose two.)

Select all that apply

A. Create an Amazon S3 bucket per user, and use your application to generate the S3 URI for the appropriate content.

B. Use AWS Identity and Access Management (IAM) user accounts as your application-level user database, and offload the burden of authentication from your application code.

C. Authenticate your users at the application level, and use AWS Security Token Service (STS) to grant token-based authorization to S3 objects.

D. Authenticate your users at the application level, and send an SMS token message to the user. Create an Amazon S3 bucket with the same name as the SMS message token, and move the user's objects to that bucket.

E. Use a key-based naming scheme comprised from the user IDs for all user objects in a single Amazon S3 bucket.

Question 286

Choose the option that is cost-effective and can fulfill the requirements.

A. Create a new Auto Scaling group with minimum and maximum of 2 and instances running web proxy software. Configure the VPC route table to route HTTP traffic to these web proxies.

B. Modify the application running on the instances to enable termination protection while it processes a task and disable it when the processing is complete.

C. Increase the minimum and maximum size for the Auto Scaling group, and change the scaling policies so they scale less dynamically.

D. Modify the application running on the instances to put itself into an Auto Scaling Standby state while it processes a task and return itself to InService when the processing is complete.

Question 287

The operations team and the development team want a single place to view both operating system and application logs. How should you implement this using AWS services? (Choose two.)

Select all that apply

A. Using AWS CloudFormation, create a CloudWatch Logs LogGroup and send the operating system and application logs of interest using the CloudWatch Logs Agent.

B. Using AWS CloudFormation and configuration management, set up remote logging to send events via UDP packets to CloudTrail.

C. Using configuration management, set up remote logging to send events to Amazon Kinesis and insert these into Amazon CloudSearch or Amazon Redshift, depending on available analytic tools. D. Using AWS CloudFormation, create a CloudWatch Logs LogGroup. Because the Cloudwatch Log agent automatically sends all operating system logs, you only have to configure the application logs for sending off-machine.

D. Using AWS CloudFormation, merge the application logs with the operating system logs, and use IAM Roles to allow both teams to have access to view console output from Amazon EC2.

Question 288

The project you are working on currently uses a single AWS CloudFormation template to deploy its AWS infrastructure, which supports a multi-tier web application. You have been tasked with organizing the AWS CloudFormation resources so that they can be maintained in the future, and so that different departments such as Networking and Security can review the architecture before it goes to Production.

How should you do this in a way that accommodates each department, using their existing workflows?

A. Organize the AWS CloudFormation template so that related resources are next to each other in the template, such as VPC subnets and routing rules for Networking and security groups and IAM information for Security.

B. Separate the AWS CloudFormation template into a nested structure that has individual templates for the resources that are to be governed by different departments, and use the outputs from the networking and security stacks for the application template that you control

C. Organize the AWS CloudFormation template so that related resources are next to each other in the template for each department's use, leverage your existing continuous integration tool to constantly deploy changes from all parties to the Production environment, and then run tests for validation.

D. Use a custom application and the AWS SDK to replicate the resources defined in the current AWS CloudFormation template, and use the existing code review system to allow other departments to approve changes before altering the application for future deployments.

Question 289

You currently run your infrastructure on Amazon EC2 instances behind an Auto Scaling group. All logs for you application are currently written to ephemeral storage. Recently your company experienced a major bug in code that made it through testing and was ultimately deployed to your fleet. This bug triggered your Auto Scaling group to scale up and back down before you could successfully retrieve the logs off your server to better assist you in troubleshooting the bug.

Which technique should you use to make sure you are able to review your logs after your instances have shut down?

A. Configure the ephemeral policies on your Auto Scaling group to back up on terminate.

B. Configure your Auto Scaling policies to create a snapshot of all ephemeral storage on terminate.

C. Install the CloudWatch Logs Agent on your AMI, and configure CloudWatch Logs Agent to stream your logs.

D. Install the CloudWatch monitoring agent on your AMI, and set up new SNS alert for CloudWatch metrics that triggers the CloudWatch monitoring agent to backup all logs on the ephemeral drive.

E. Install the CloudWatch monitoring agent on your AMI, Update your Auto Scaling policy to enable automated CloudWatch Log copy.

Question 290

Management has reported an increase in the monthly bill from Amazon web services, and they are extremely concerned with this increased cost. Management has asked you to determine the exact cause of this increase. After reviewing the billing report, you notice an increase in the data transfer cost.

How can you provide management with a better insight into data transfer use?

A. Update your Amazon CloudWatch metrics to use five-second granularity, which will give better detailed metrics that can be combined with your billing data to pinpoint anomalies.

B. Use Amazon CloudWatch Logs to run a map-reduce on your logs to determine high usage and data transfer.

C. Deliver custom metrics to Amazon CloudWatch per application that breaks down application data transfer into multiple, more specific data points.

D. Using Amazon CloudWatch metrics, pull your Elastic Load Balancing outbound data transfer metrics monthly, and include them with your billing report to show which application is causing higher bandwidth usage.

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