A company is building an application to track athlete performance using an Amazon DynamoDB table. Each item in the table is identified by a partition key (user_id) and a sort key (sport_name). The table design is shown below:(Note: Not all table attributes are shown)A Developer is asked to write a leaderboard application to display the top performers (user_id) based on the score for each sport_name. What process will allow the Developer to extract results MOST efficiently from the DynamoDB table?

Create a global secondary index with a partition key of sport_name and a sort key of score, and get the results

Use a DynamoDB query operation with the key attributes of user_id and sport_name and order the results based on the score attribute.

Create a global secondary index with a partition key of sport_name and a sort key of score, and get the results

Use a DynamoDB scan operation to retrieve scores and user_id based on sport_name, and order the results based on the score attribute.

Create a local secondary index with a primary key of sport_name and a sort key of score and get the results based on the score attribute.

A company has multiple Developers located across the globe who are updating code incrementally for a development project. When Developers upload code concurrently, internet connectivity is slow, and it is taking a long time to upload code for deployment in AWS Elastic Beanstalk.Which step will result in minimized upload and deployment time with the LEAST amount of administrative effort?

Allow the Developers to upload the code to a central FTP server to deploy the application to Elastic Beanstalk.

Allow the Developers to upload the code to an Amazon S3 bucket, and deploy it directly to Elastic Beanstalk.

Allow the Developers to upload the code to a central FTP server to deploy the application to Elastic Beanstalk.

Create an AWS CodeCommit repository, allow the Developers to commit code to it, and then directly deploy the code to Elastic Beanstalk.

Create a code repository on an Amazon EC2 instance so that all Developers can update the code, and deploy the application from the instance to Elastic Beanstalk.

What does an Amazon SQS delay queue accomplish?

Messages are hidden for a configurable amount of time when they are first added to the queue.

Messages are hidden for a configurable amount of time after they are consumed from the queue.

The consumer can poll the queue for a configurable amount of time before retrieving a message.

Message cannot be deleted for a configurable amount of time after they are consumed from the queue.

A company has an internet-facing application that uses Web Identity Federation to obtain a temporary credential from AWS Security Token Service (AWS STS). The app then uses the token to access AWS services. Review the following response: Based on the response displayed what permissions are associated with the call from the application?

Permission associated with the IAM principal that owns the AccessKeyID ASgeIAIOSFODNN7EXAMPLE

Permissions associated with the role AROACLKWSDQRAOEXAMPLE:app1

Permissions associated with the default role used when the AWS service was built

Permission associated with the IAM principal that owns the AccessKeyID ASgeIAIOSFODNN7EXAMPLE

Permissions associated with the account that owns the AWS service

Where should the appspec.yml file be placed in order for AWS CodeDeploy to work?

In the root of the application source code directory structure

In the bin folder along with all the complied code

In the same folder as the application configuration files

An existing serverless application processes uploaded image files. The process currently uses a single Lambda function that takes an image file, performs the processing, and stores the file in Amazon S3. Users of the application now require thumbnail generation of the images. Users want to avoid any impact to the time it takes to perform the image uploads. How can thumbnail generation be added to the application, meeting user requirements while minimizing changes to existing code?

Create an S3 event notification with a Lambda function destination. Create a new Lambda function to generate and store thumbnails.

Change the existing Lambda function handling the uploads to create thumbnails at the time of upload. Have the function store both the image and thumbnail in Amazon S3.

Create a second Lambda function that handles thumbnail generation and storage. Change the existing Lambda function to invoke it asynchronously.

Create an S3 event notification with a Lambda function destination. Create a new Lambda function to generate and store thumbnails.

Create an S3 event notification to an SQS Queue. Create a scheduled Lambda function that processes the queue, and generates and stores thumbnails.

A Developer must re-implement the business logic for an order fulfilment system. The business logic has to make requests to multiple vendors to decide where to purchase an item. The whole process can take up to a week to complete. What is the MOST efficient and SIMPLEST way to implement a system that meets these requirements?

Use AWS Step Functions to execute parallel Lambda functions, and join the results.

Create an AWS SQS for each vendor, poll the queue from a worker instance, and joint the results.

Use AWS Lambda to asynchronously call a Lambda function for each vendor, and join the results.

Use Amazon CloudWatch Events to orchestrate the Lambda functions.

A customer wants to deploy its source code on an AWS Elastic Beanstalk environment. The customer needs to perform deployment with minimal outage and should only use existing instances to retain application access log. What deployment policy would satisfy these requirements?

Rolling with an additional batch

A Developer has been asked to build a real-time dashboard web application to visualize the key prefixes and storage size of objects in Amazon S3 buckets. Amazon DynamoDB will be used to store the Amazon S3 metadata. What is the optimal and MOST cost-effective design to ensure that the real-time dashboard is kept up to date with the state of the objects in the Amazon S3 buckets?

Use an Amazon CloudWatch event backed by an AWS Lambda function. Issue an Amazon S3 API call to get a list of all Amazon S3 objects and persist the metadata within DynamoDB. Have the web application poll the DynamoDB table to reflect this change.

Use Amazon S3 Event Notification backed by a Lambda function to persist the metadata into DynamoDB. Have the web application poll the DynamoDB table to reflect this change.

Run a cron job within an Amazon EC2 instance to list all objects within Amazon S3 and persist the metadata into DynamoDB. Have the web application poll the DynamoDB table to reflect this change.

Create a new Amazon EMR cluster to get all the metadata about Amazon S3 objects; persist the metadata into DynamoDB. Have the web application poll the DynamoDB table to reflect this change.

A Developer must repeatedly and consistently deploy a serverless RESTful API on AWS.Which techniques will work? (Choose two.)

Deploy a SAM template with an inline Swagger definition.

Define a Swagger file. Deploy a SAM template that references the Swagger file.

Define a Swagger file. Use AWS Elastic Beanstalk to deploy the Swagger file.

Define a Swagger file. Use AWS CodeDeploy to deploy the Swagger file.

Deploy a SAM template with an inline Swagger definition.

Define a Swagger file. Deploy a SAM template that references the Swagger file.

Define an inline Swagger definition in a Lambda function. Invoke the Lambda function.

A set of APIs are exposed to customers using the Amazon API Gateway. These APIs have caching enabled on the API Gateway. Customers have asked for an option to invalidate this cache for each of the APIs. What action can be taken to allow API customers to invalidate the API Cache?

Ask customers to pass an HTTP header called Cache-Control:max-age=0.

Ask customers to use AWS credentials to call the InvalidateCache API.

Ask customers to invoke an AWS API endpoint which invalidates the cache.

Ask customers to pass an HTTP header called Cache-Control:max-age=0.

Ask customers to add a query string parameter called “INVALIDATE_CACHE” when making an API call.

A Developer uses AWS CodeDeploy to automate application deployment that connects to an external MySQL database. The Developer wants to securely access the encrypted secrets, such as API keys and database passwords. Which of the following solutions would involve the LEAST administrative effort?

Use AWS SSM Parameter Store to store the secrets and to programmatically access them by using the IAM role from EC2 instances.

Save the secrets in Amazon S3 with AWS KMS server-side encryption, and use a signed URL to access them by using the IAM role from Amazon EC2 instances.

Use the instance metadata to store the secrets and to programmatically access the secrets from EC2 instances.

Use the Amazon DynamoDB client-side encryption library to save the secrets in DynamoDB and to programmatically access the secrets from EC2 instances.

Use AWS SSM Parameter Store to store the secrets and to programmatically access them by using the IAM role from EC2 instances.

An application running on EC2 instances is storing data in an S3 bucket. Security policy mandates that all data must be encrypted in transit.How can the Developer ensure that all traffic to the S3 bucket is encrypted?

Create a bucket policy that denies traffic where SecureTransport is false.

Install certificates on the EC2 instances.

Create a bucket policy that allows traffic where SecureTransport is true.

Create an HTTPS redirect on the EC2 instances.

Create a bucket policy that denies traffic where SecureTransport is false.

A company is developing a new online game that will run on top of Amazon ECS. Four distinct Amazon ECS services will be part of the architecture, each requiring specific permissions to various AWS services. The company wants to optimize the use of the underlying Amazon EC2 instances by bin packing the containers based on memory reservation. Which configuration would allow the Development team to meet these requirements MOST securely?

Create four distinct IAM roles, each containing the required permissions for the associated ECS service, then configure each ECS task definition to referen?e the associated IAM role.

Create a new Identity and Access Management (IAM) instance profile containing the required permissions for the various ECS services, then associate that instance role with the underlying EC2 instances.

Create four distinct IAM roles, each containing the required permissions for the associated ECS service, then configure each ECS service to reference the associated IAM role.

Create four distinct IAM roles, each containing the required permissions for the associated ECS service, then, create an IAM group and configure the ECS cluster to reference that group.

Create four distinct IAM roles, each containing the required permissions for the associated ECS service, then configure each ECS task definition to referen?e the associated IAM role.

When a Developer tries to run an AWS CodeBuild project, it raises an error because the length of all environment variables exceeds the limit for the combined maximum of characters. What is the recommended solution?

Use AWS Systems Manager Parameter Store to store large numbers of environment variables.

Add the export LC_ALL=“en_US.utf8” command to the pre_build section to ensure POSIX localization.

Use Amazon Cognito to store key-value pairs for large numbers of environment variables.

Update the settings for the build project to use an Amazon S3 bucket for large numbers of environment variables.

Use AWS Systems Manager Parameter Store to store large numbers of environment variables.

A Lambda function is packaged for deployment to multiple environments, including development, test, production, etc. Each environment has unique set of resources such as databases, etc. How can the Lambda function use the resources for the current environment?

Use environment variables for the Lambda functions.

Apply tags to the Lambda functions.

Hardcore resources in the source code.

Use environment variables for the Lambda functions.

Use separate function for development and production.

The Developer for a retail company must integrate a fraud detection solution into the order processing solution. The fraud detection solution takes between ten and thirty minutes to verify an order. At peak, the web site can receive one hundred orders per minute.What is the most scalable method to add the fraud detection solution to the order processing pipeline?

Add all new orders to an SQS queue. Configure an Auto Scaling group that uses the queue depth metric as its unit of scale to launch a dynamically-sized fleet of EC2 instances spanning multiple AZs with the fraud detection solution installed on them to pull orders from this queue. Update the order with a pass or fails status.

Add all new orders to an Amazon SQS queue. Configure a fleet of 10 EC2 instances spanning multiple AZs with the fraud detection solution installed on them to pull orders from this queue. Update the order with a pass or fails status.

Add all new orders to an SQS queue. Configure an Auto Scaling group that uses the queue depth metric as its unit of scale to launch a dynamically-sized fleet of EC2 instances spanning multiple AZs with the fraud detection solution installed on them to pull orders from this queue. Update the order with a pass or fails status.

Add all new orders to an Amazon Kinesis Stream. Subscribe a Lambda function to automatically read batches of records from the Kinesis Stream. The Lambda function includes the fraud detection software and will update the order with a pass or fail status.

Write all new orders to Amazon DynamoDB. Configure DynamoDB Streams to include all new orders. Subscribe a Lambda function to automatically read batches of records from the Kinesis Stream. The Lambda function includes the fraud detection software and will update the order with a pass or fail status.

An application is real-time processing millions of events that are received through an API.What service could be used to allow multiple consumers to process the data concurrently and MOST cost-effectively?

Amazon SNS with fanout to an SQS queue for each application

Amazon SNS with fanout to an SQS FIFO (first-in, firtst-out) queue for each application

A Developer needs to use AWS X-Ray to monitor an application that is deployed on EC2 instances.What steps have to be executed to perform the monitoring?

Install the X-Ray daemon and configure it to forward data to Amazon CloudWatch Events.

Deploy the X-Ray SDK with the application and use X-Ray annotation.

Install the X-Ray daemon and instrument the application code.

Install the X-Ray daemon and configure it to forward data to Amazon CloudWatch Events.

Deploy the X-Ray SDK with the application and instrument the application code.

A Developer will be using the AWS CLI on a local development server to manage AWS services.What can be done to ensure that the CLI uses the Developer’s IAM permissions when making commands?

Run the aws configure CLI command, and provide the Developer’s IAM access key ID and secret access key.

Specify the Developer’s IAM access key ID and secret access key as parameters for each CLI command.

Run the aws configure CLI command, and provide the Developer’s IAM access key ID and secret access key.

Specify the Developer’s IAM user name and password as parameters for each CLI command.

Use the Developer’s IAM role when making the CLI command.

After installing the AWS CLI, a Developer tries to run the command aws configure but receives the following error:Error: aws: command not foundWhat is the most likely cause of this error?

The aws executable is not in the PATH environment variable.

Access to the aws executable has been denied to the installer.

Incorrect AWS credentials were provided.

The aws script does not have an executable file mode.

An on-premises legacy application is caching data files locally and writing shared images to local disks. What is necessary to allow for horizontal scaling when migrating the application to AWS?

Modify the application to use Amazon S3 for serving shared images; cache data can then be written to local disks.

Modify the application to have both shared images and caching data written to Amazon EBS.

Modify the application to read and write cache data on Amazon S3, and also store shared images on S3.

Modify the application to use Amazon S3 for serving shared images; cache data can then be written to local disks.

Modify the application to read and write cache data on Amazon S3, while continuing to write shared images to local disks.

A Developer must trigger an AWS Lambda function based on the item lifecycle activity in an Amazon DynamoDB table. How can the Developer create the solution?

Enable a DynamoDB stream, and trigger the Lambda function synchronously from the stream.

Enable a DynamoDB stream that publishes an Amazon SNS message. Trigger the Lambda function synchronously from the SNS message.

Enable a DynamoDB stream that publishes an SNS message. Trigger the Lambda function asynchronously from the SNS message.

Enable a DynamoDB stream, and trigger the Lambda function synchronously from the stream.

Enable a DynamoDB stream, and trigger the Lambda function asynchronously from the stream.

An application displays a status dashboard. The status is updated by 1 KB messages from an SQS queue. Although the status changes infrequently, the Developer must minimize the time between the message arrival in the queue and the dashboard update.What technique provides the shortest delay in updating the dashboard?

Retrieve the messages from the queue using long polling every 20 seconds.

Reduce the size of the messages by compressing them before sending.

Retrieve the messages from the queue using short polling every 10 seconds.

Reduce the size of each message payload by sending it in two parts.

A company is using AWS CodePipeline to deliver one of its applications. The delivery pipeline is triggered by changes to the master branch of an AWS CodeCommit repository and uses AWS CodeBuild to implement the test and build stages of the process and AWS CodeDeploy to deploy the application.The pipeline has been operating successfully for several months and there have been no modifications. Following a recent change to the application’s source code, AWS CodeDeploy has not deployed the updates application as expected. What are the possible causes? (Choose two.)

The change was not made in the master branch of the AWS CodeCommit repository.

One of the earlier stages in the pipeline failed and the pipeline has terminated.

The change was not made in the master branch of the AWS CodeCommit repository.

One of the earlier stages in the pipeline failed and the pipeline has terminated.

One of the Amazon EC2 instances in the company’s AWS CodePipeline cluster is inactive.

The AWS CodePipeline is incorrectly configured and is not executing AWS CodeDeploy.

AWS CodePipeline does not have permissions to access AWS CodeCommit.

A social media company is using Amazon Cognito in order to synchronize profiles across different mobile devices, to enable end users to have a seamless experience. Which of the following configurations can be used to silently notify users whenever an update is available on all other devices?

Use the push synchronization feature with the appropriate IAM role.

Modify the user pool to include all the devices which keep them in sync.

Use the SyncCallback interface to receive notifications on the application.

Use an Amazon Cognito stream to analyze the data and push the notifications.

Use the push synchronization feature with the appropriate IAM role.

A website’s page load times are gradually increasing as more users access the system at the same time. Analysis indicates that a user profile is being loaded from a database in all the web pages being visited by each user and this is increasing the database load and the page load latency. To address this issue the Developer decides to cache the user profile data. Which caching strategy will address this situation MOST efficiently?

Create an Amazon ElastiCache cluster to cache the user profile data. Use a cache-aside caching strategy.

Create a new Amazon EC2 Instance and run a NoSQL database on it. Cache the profile data within this database using the write-through caching strategy.

Create an Amazon ElastiCache cluster to cache the user profile data. Use a cache-aside caching strategy.

Use a dedicated Amazon RDS instance for caching profile data. Use a write-through caching strategy.

Create an ElastiCache cluster to cache the user profile data. Use a write-through caching strategy.

An application needs to use the IP address of the client in its processing. The application has been moved into AWS and has been placed behind an Application Load Balancer (ALB). However, all the client IP addresses now appear to be the same. The application must maintain the ability to scale horizontally.Based on this scenario, what is the MOST cost-effective solution to this problem?

Alter the application code to inspect the X-Forwarded-For header. Ensure that the code can work properly if a list of IP addresses is passed in the header.

Remove the application from the ALB. Delete the ALB and change Amazon Route 53 to direct traffic to the instance running the application.

Remove the application from the ALB. Create a Classic Load Balancer in its place. Direct traffic to the application using the HTTP protocol.

Alter the application code to inspect the X-Forwarded-For header. Ensure that the code can work properly if a list of IP addresses is passed in the header.

Alter the application code to inspect a custom header. Alter the client code to pass the IP address in the custom header.

A development team is using AWS Elastic Beanstalk to deploy a two-tier application that consists of a load-balanced web tier and an Amazon RDS database tier in production. The team would like to separate the RDS instance from the Elastic Beanstalk.How can this be accomplished?

Recreate a new Elastic Beanstalk environment without Amazon RDS.

Use the Elastic Beanstalk CLI to disassociate the database.

Use the AWS CLI to disassociate the database.

Change the deployment policy to disassociate the database.

Recreate a new Elastic Beanstalk environment without Amazon RDS.

According to best practice, how should access keys be managed in AWS? (Choose two.)

Delete all access keys for the account root user.

Use Amazon IAM roles instead of access keys where possible.

Use the same access key in all applications for consistency.

Delete all access keys for the account root user.

Leave unused access keys in the account for tracking purposes.

Embed and encrypt access keys in code for continuous deployment.

Use Amazon IAM roles instead of access keys where possible.

The development team is working on an API that will be served from Amazon API gateway. The API will be served from three environments: development, test, and production. The API Gateway is configured to use 237 GB of cache in all three stages.Which is the MOST cost-efficient deployment strategy?

Enable the cache for development and test environments only when needed.

Create a single API Gateway with all three stages.

Create three API Gateways, one for each stage in a single AWS account.

Create an API Gateway in three separate AWS accounts.

Enable the cache for development and test environments only when needed.

An application running on an Amazon Linux EC2 instance needs to manage the AWS infrastructure.How can the EC2 instance be configured to make AWS API calls securely?

Specify a role for the EC2 instance with the necessary privileges.

Sign the AWS CLI command using the signature version 4 process.

Run the aws configure AWS CLI command and specify the access key id and secret access key.

Specify a role for the EC2 instance with the necessary privileges.

Pass the access key id and secret access key as parameters for each AWS CLI command.

Amazon DVA-C01 Practice Test 5 - Free Online Exam Questions 161-200

A Developer is creating a mobile application that will not require users to log in.

What is the MOST efficient method to grant users access to AWS resources?

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