A company is using AWS CloudFormation templates to deploy AWS resources. The company needs to update one of its AWS CloudFormation stacks What can the company do to find out how the changes will impact the resources that are running?

Investigate the Metadata section.

Investigate the Resources section.

A developer has created a Node js web application on a local development machine. The developer wants to use AWS technology to host the website. The developer needs a solution that requires the least possible operational overhead and no code changes.Which AWS service should the developer use to meet these requirements?

Amazon Elastic Kubernetes Service (Amazon EKS)

A developer is creating AWS CloudFormation templates to manage an application's deployment in Amazon Elastic Container Service (Amazon ECS) through AWS CodeDeploy. The developer wants to automatically deploy new versions of the application to a percentage of users before the new version becomes available for all users.How should the developer manage the deployment of the new version?

Deploy the new version in a new CloudFormation stack After testing is complete, update the application's DNS records for the new stack.

Modify the CloudFormation template to include a Transform section and the AWS "CodeDeploy::BlueGreen hook.

Deploy the new version in a new CloudFormation stack After testing is complete, update the application's DNS records for the new stack.

Run CloudFormation stack updates on the application stack to deploy new application versions when they are available.

Create a nested stack for the new version. Include a Transform section and the AWS: CodeDeploy BlueGreen hook.

A developer is writing an application to analyze the traffic to a fleet of Amazon EC2 instances The EC2 instances run behind a public Application Load Balancer (ALB). An HTTP server runs on each of the EC2 instances, logging all requests to a log file.The developer wants to capture the client public IP addresses. The developer analyzes the log files and notices only the IP address of the ALB What must the developer do to capture the client public IP addresses in the log file?

Install the AWS X-Ray daemon on each EC2 instance Configure the daemon to write to the log file.

Add a Host header to the HTTP server log configuration file

Install the Amazon CloudWatch Logs agent on each EC2 instance. Configure the agent to write to the log file.

Install the AWS X-Ray daemon on each EC2 instance Configure the daemon to write to the log file.

Add an X-Forwarded-For header to the HTTP server log configuration file.

A developer at a company writes an AWS ClojdForination template. The template refers to subnets that were created by a separate AWS Cloud Formation template that the company's network team wrote. When the developer attempts to launch the stack for the first time, the launch fails.Which template coding mistakes could have caused this failure? (Select TWO.)

The developer's template does not use the ImportValue intrinsic function to refer to the subnets

The network team's template does not export the subnets in the Outputs section

The developer's template does not use the Ref intrinsic function to refer to the subnets

The developer's template does not use the ImportValue intrinsic function to refer to the subnets

The Mappings section of the developer's template does not refer to the subnets.

The network team's template does not export the subnets in the Outputs section

The network team's template does not export the subnets in the Mappings section

A developer is building an application. The application's front end is developed in JavaScript, and the data is stored in an Amazon DynamoDB table During testing, the application returns an HTTP 5xx error from the strongly consistent reads to the DynamoDB table; "Internal server error (Service:AmazonDynamoDBv2. Status Code: 500; Error Code; InternalServerError)." Which actions should the developer take to mitigate this error? (Select TWO )

Avoid strongly consistent reads

Retry the failed read requests with exponential backoff

Avoid strongly consistent reads

Increase read/write capacity of DynamoDB to meet the peak load.

Retry the failed read requests with exponential backoff

Configure DynamoDB auto scaling

A developer wants to modify the following AWS Cloud Formation template to embed another CloudFormation stack: Which syntax should the developer add to the blank line of the CloudFormation template to meet this requirement?

"Mapping" : "AWS::CloudFormation::Stack",

"Type" : "AWS;:CloudFcrmation::NestedStack",

"Typ©" : "AWS::CloudFormation::Stack",

"Mapping" : "AWS::CloudFormation::NestedStack",

A developer is working on a serverless application. The application uses Amazon API Gateway. AWS Lambda functions that are written in Python, and Amazon DynamoDB. Which combination of steps should the developer take so that the Lambda functions can be debugged in the event of application failures? (Select TWO )

Ensure that the execution role for the Lambda function has access to write to Amazon CloudWatch Logs.

Use the Amazon CloudWatch metric for Lambda errors to create a CloudWatch alarm.

Configure an AWS CloudTrail trail to deliver log files to an Amazon S3 bucket

Ensure that the Lambda functions write log messages to stdout and stderr

Enable an AWS CloudTrail trail for the Lambda function

Ensure that the execution role for the Lambda function has access to write to Amazon CloudWatch Logs.

Use the Amazon CloudWatch metric for Lambda errors to create a CloudWatch alarm.

A developer supports an application that accesses data in an Amazon DynamoDB table One of the item attributes is expirationDate In the timestamp format The application uses this attribute to find items archive them and remove them from the table based on the timestamp value The application will be decommissioned soon, and the developer must find another way to implement this functionality The developer needs a solution that will require the least amount of code to write. Which solution will meet these requirements?

Create two AWS Lambda functions one to delete the items and one to process the items Create an Amazon EventBridge (Amazon CloudWatch Events) scheduled rule to invoke the Lambda functions Use the Deleteltem API operation to delete the items based on the expirationDate attribute Use the GetRecords API operation to get the items from the DynamoDB table and process them

Enable TTL on the expirationDate attribute in the table. Create a DynamoDB stream. Create an AWS Lambda function to process the deleted items. Create a DynamoDB trigger for the Lambda function

Create two AWS Lambda functions one to delete the items and one to process the items Create a DynamoDB stream Use the Deleteltem API operation to delete the items based on the expirationDate attribute Use the GetRecords API operation to get the items from the DynamoDB stream and process them

Create two AWS Lambda functions one to delete the items and one to process the items Create an Amazon EventBridge (Amazon CloudWatch Events) scheduled rule to invoke the Lambda functions Use the Deleteltem API operation to delete the items based on the expirationDate attribute Use the GetRecords API operation to get the items from the DynamoDB table and process them

Enable TTL on the expirationDate attribute in the table Specify an Amazon Simple Queue Service(Amazon SQS) dead-letter queue as the target to delete the items Create an AWS Lambda function to process the items.

A developer used the BalehWnteltern API operation to insert items in an Amazon DynamoDB table OynamoDB returned a few items as unprocessed due to throttling The developer decides to retry the records on the unprocessed items What should the developer do to reprocess the records with the LEAST number of API calls'?

Delete the items that were successfully processed, and reissue a new BatchWriteltem operation

Retry the BatchWriteltem operation immediately

Perform the Putltem operation on the unprocessed items individually instead of using the BatchWriteltem operation

Delay the BatchWriteltem operation by using progressively longer wait times between retries, or exponential backoff

Delete the items that were successfully processed, and reissue a new BatchWriteltem operation

A team deployed an AWS CloudFormaiion template to update a stack that already included an Amazon RDS DB instance However, before the deployment of the update the team changed the name of the DB instance on the template by mistake The DeletionPoIicy attribute for all resources was not changed from the default values What will be the result of this mistake?

AWS CloudFormation will create a new database and delete the old one

AWS CloudFormation will create a new database and keep the old one

AWS CloudFormation will overwrite the existing database and rename it

AWS CloudFormation will leave the existing database and will not create a new one

An application uses Amazon DynamoDB as its backend database The application experiences sudden spikes in traffic over the weekend and variable but predictable spikes during weekdays The capacity needs to be set to avoid throttling errors at all times How can this be accomplished cost-effectively?

Use provisioned capacity with AWS Auto Scaling throughout the week.

Use on-demand capacity for the weekend and provisioned capacity with AWS Auto Scaling during the weekdays

Use on-demand capacity throughout the week

Use provisioned capacity with AWS Auto Scaling enabled during the weekend and reserved capacity enabled during the weekdays

A developer needs to deploy a new version to an AWS Elastic Beanstalk application How can the developer accomplish this task?

Upload and deploy the new application version in the Elastic Beanstalk console

Use the eb init CLI command to deploy a new version '

Terminate the current Elastic Beanstalk environment and create a new one

Modify the ebextensions folder to add a source option to services

A developer wants to use React to build a web and mobile application. The application will be hosted on AWS The application must authenticate users and then allow users to store and retrieve files that they own The developer wants to use Facebook for authentication Which CLI will MOST accelerate the development and deployment of this application on AWS?

AWS Serverless Application Model (AWS SAM) CLI

Amazon Elastic Container Service (Amazon ECS) CLI

A developer has created an AWS Lambda function that is written in Python The Lambda function reads data from objects in Amazon S3 and writes data to an Amazon DynamoDB table The function is successfully invoked from an S3 event notification when an object is created However, the function fails when if attempts to write to the DynamoDB table What is the MOST likely cause of this issue?

The Lambda function does not have 1AM permissions to write to DynamoDB ID.

The Lambda function's concurrency limit has been exceeded

The DynamoDB table requires a global secondary index (GSI) to support writes.

The Lambda function does not have 1AM permissions to write to DynamoDB ID.

The DynamoDB table is not running in the same Availability Zone as the Lambda function.

Multiple development teams are working on a project to migrate a monolithic application to a microservices-based application running on AWS Lambda The teams need a way to centrally manage code that is shared across multiple functions Which approach requires the LEAST maintenance?

Each team builds and publishes the component they want to share to an Amazon S3 bucket The Lambda functions will download the components from the bucket

Each team maintains the code for the common components in their own code repository. They build and deploy the components with their Lambda functions together.

One team builds a Lambda layer to include the common components and shares the layer with the other teams

Each team builds and publishes the component they want to share to an Amazon S3 bucket The Lambda functions will download the components from the bucket

One team builds a Docker container for the common components and shares the container with the other teams

A developer has written an application that runs on Amazon EC2 instances. The developer is adding functionality for the application to write objects to an Amazon S3 bucket Which policy must the developer modify to allow the instances to write these objects?

The 1AM policy that is attached to the EC2 instance profile role

The session policy that is applied to the EC2 instance role session

The AWS Key Management Service (AWS KMS) key policy that is attached to the EC2 instance profile role.

A developer tested an application locally and then deployed it to AWS Lambda While testing the application remotely the Lambda function fails with an access denied message. How can this issue be addresksed?

Update the Lambda function's execution role to include the missing permissions

Update the Lambda function's resource policy to include the missing permissions

Include an 1AM policy document at the root of the deployment package and redeploy the Lambda function.

Redeploy the Lambda function using an account with access to the AdministratorAccess policy

A developer is working on a serverless application lhat needs lo process any changes to an Amazon DynamoDB table with an AWS Lambda function How should the developer configure the Lambda function to detect changes to the DynamoDB tabled

Enable DynamoDB Streams on the table Create a trigger to connect the DynamoDB stream to the Lambda function

Create an Amazon Kinesis data stream, and attach it to the DynamoDB table Create a trigger to connect the data stream to the Lambda function

Create an Amazon EventBridge (Amazon CloudWatch Events) rule to invoke the Lambda function on a regular schedule Connect to the DynamoDB table from the Lambda function to detect changes

Enable DynamoDB Streams on the table Create a trigger to connect the DynamoDB stream to the Lambda function

Create an Amazon Kinesis Data Firehose delivery stream, and attach it to the DynamoDB table Configure the delivery stream destination as the Lambda function

A company has three AWS Lambda functions that are written in Node js The Lambda functions include a mix of custom code and open-source modules When bugs are occasionally detected in the open-source modules, all three Lambda functions must be patched.What is the MOST operationally efficient solution to deploy a patched open-source library for all three Lambda functions?

Create a Lambda layer with the open-source modules Modify all three Lambda functions to depend on the layer Remove the open-source modules from each Lambda function Patch the Lambda layer with the modified open-source modules when needed Update the Lambda functions to reference the new layer version

Create a custom AWS CloudFormation public registry extension Reference a GitHub repository that hosts the open-source modules m the extension Configure Formation to scan the repository once each day Write an AWS Serverless Application Model (AWS SAM) template to redeploy the three Lambda functions upon a scan notification change.

Create an Amazon CloudFront distribution with an Amazon S3 bucket as the origin Upload the patched modules to Amazon S3 when needed Modify each Lambda function to download the patched modules from the CloudFront distribution during the cold start.

Launch an Amazon EC2 instance Host a private open-source module registry on the EC2 instance Upload the modified open-source modules to the private registry when needed. Modify each Lambda function deployment script to download the modules from the private registry Redeploy the three new Lambda functions.

Create a Lambda layer with the open-source modules Modify all three Lambda functions to depend on the layer Remove the open-source modules from each Lambda function Patch the Lambda layer with the modified open-source modules when needed Update the Lambda functions to reference the new layer version

An application runs on multiple EC2 instances behind an ELB.Where is the session data best written so that it can be served reliably across multiple requests?

Write data to Amazon ElasticCache.

Write data to Amazon Elastic Block Store.

Write data to Amazon EC2 instance Block Store.

Write data to the root filesystem.

A company hosts a client-side web application for one of its subsidiaries on Amazon S3. The web application can be accessed through Amazon CloudFront from https://www.example.com. After a successful rollout, the company wants to host three more client-side web applications for its remaining subsidiaries on three separate S3 buckets.To achieve this goal, a developer moves all the common JavaScript files and web fonts to a central S3 bucket that serves the web applications. However, during testing, the developer notices that the browser blocks the JavaScript files and web fonts.What should the developer do to prevent the browser from blocking the JavaScript files and web fonts?

Create a cross-origin resource sharing (CORS) configuration that allows access to the central S3 bucket. Add the CORS configuration to the central S3 bucket.

Create four access points that allow access to the central S3 bucket. Assign an access point to each web application bucket.

Create a bucket policy that allows access to the central S3 bucket. Attach the bucket policy to the central S3 bucket.

Create a cross-origin resource sharing (CORS) configuration that allows access to the central S3 bucket. Add the CORS configuration to the central S3 bucket.

Create a Content-MD5 header that provides a message integrity check for the central S3 bucket. insert the Content-MD5 header for each web application request.

A company hosts a microservices application that uses Amazon API Gateway, AWS Lambda, Amazon Simple Queue Service (Amazon SOS), and Amazon DynamoDB, One of the Lambda functions adds messages to an SOS FIFO queue. When a developer checks the application logs, the developer finds a few duplicated items in a DynamoDB table. The items were inserted by another polling function that processes messages from the queue. What is the MOST likely cause of this issue?

The SOS queue delivered the message to the function more than once

Write operations on the DynamoDB table are being throttled

The SOS queue delivered the message to the function more than once

API Gateway duplicated the message in the SOS queue

The polling function timeout is greater than the queue visibility timeout

A developer has written an application hosted on Amazon EC2 instances. The application generates and uploads thousands of new objects to an Amazon S3 bucket located in the same AWS region. The size of each object is less than 1 MB. The application is taking too long to run.How can the performance of the application be improved?

Add a random prefix to the object keys

Use the S3 Multipart Upload API

Upload the objects in parallel to Amazon S3

Add a random prefix to the object keys

A developer has written an application that uses Amazon API Gateway and AWS Lambda The developer needs to configure the application so that the developer can visualize the application's components and Identify performance bottlenecks What should the developer do to meet these requirements?

Enable AWS X-Ray tracing on the API Gateway stage

Enable AWS X-Ray tracing on the API Gateway methods

Enable Amazon CloudWatch Logs for API Gateway

Enable Amazon CloudWatch Logs for Lambda

A company wants to migrate an existing web application to AWS. The application consists of two web servers and a MySQL database The company wants the application to automatically scale in response to demand The company also wants to reduce its operational overhead for database backups and maintenance The company needs the ability to deploy multiple versions of the application concurrently What is the MOST operationally efficient solution that meets these requirements?

Create an Amazon Machine Image (AMI) that contains the application code. Create an Auto Scaling group that is based on the AMI Integrate the Auto Scaling group with an Application Load Balancer for the web servers. Migrate the database to a MySQL instance that runs on an Amazon EC2 instance.

Deploy the application to AWS Elastic Beanstalk. Migrate the database to an Amazon RDS Multi-AZ DB instance

Create an Amazon Machine Image (AMI) that contains the application code. Create an Auto Scaling group that is based on the AMI Integrate the Auto Scaling group with an Application Load Balancer for the web servers. Migrate the database to a MySQL instance that runs on an Amazon EC2 instance.

Deploy the application to AWS Elastic Beanstalk. Migrate the database to a MySQL instance that runs on an Amazon EC2 instance.

Create an Amazon Machine Image (AMI) that contains the application code. Create an Auto Scaling group that is based on the AMI. Integrate the Auto Scaling group with an Application Load Balancer for the web servers. Migrate the database to an Amazon RDS Multi-AZ DB Instance

A developer is building a new application that uses an Amazon DynamoDB table. The specification states that all items that are older than 48 hours must be removed Which solution will meet this requirement?

Create a new attribute that has the Number data type Enable TTL on the DynamoDB table for this attribute in the application code set the value of this attribute to the current timestamp plus 48 hours for each new item that is being inserted

Create a new attribute that has the Number data type Add a local secondary index (LSI) for this attribute and enable TTL with an expiration of 48 hours In the application code, set the value of this attribute to the current timestamp for each new item that is being inserted.

Create a new attribute that has the String data type Add a local secondary index (LSI) for this attribute and enable TTL with an expiration of 48 hours In the application code, set the value of this attribute to the current timestamp for each new item that is being inserted.

Create a new attribute that has the Number data type Enable TTL on the DynamoDB table for this attribute in the application code set the value of this attribute to the current timestamp plus 48 hours for each new item that is being inserted

Create a new attribute that has the String data type Enable TTL on the DynamoDB table for this attribute In the application code set the value of this attribute to the current timestamp plus 48 hours for each new item that is being inserted

A developer has written the following 1AM policy to provide access to an Amazon S3 bucket: Which access does the policy allow regarding the s3:GetObject and s3:PutObject actions'?

Access on all buckets that start with "DOC-EXAMPLE-BUCKET" except the "DOC-EXAMPLEBUCKET/ secrets" bucket

Access on all buckets except the "DOC-EXAMPLE-BUCKET' bucket

Access on all buckets that start with "DOC-EXAMPLE-BUCKET" except the "DOC-EXAMPLEBUCKET/ secrets" bucket

Access on all objects in the "DOC-EXAMPLE-BUCKET" bucket along with access to all S3 actions for objects in the "DOC-EXAMPLE-BUCKET" bucket that start with "secrets"

Access on all objects in the "DOC-EXAMPLE-BUCKET" bucket except on objects that start with "secrets"

A developer creates an Amazon S3 bucket to store project status files that are uploaded hourly. The developer also creates an AWS Lambda function that will be used to process the project status files What should the developer do to invoke the function with the LEAST amount of AWS infrastructure'?

Create an S3 event notification to invoke the function when a new object is created in the S3 bucket

Create an Amazon EventBridge (Amazon CloudWatch Events) rule to invoke the function every 5 minutes and scan for new objects

Create an S3 event notification to invoke the function when a new object is created in the S3 bucket

Create an S3 event notification that publishes a message to an Amazon Simple Notification Service (Amazon SNS) topic Subscribe the function to the SNS topic.

Create an S3 event notification that adds a message to an Amazon Simple Queue Service (Amazon SQS) queue Configure the function to poll the queue

A developer is automating a new application deployment with AWS Serverless Application Model(AWS SAM) The new application has one AWS Lambda function and one Amazon S3 bucket The Lambda function must access the S3 bucket to only read objects How should the developer configure AWS SAM to grant the necessary read privilege to the S3 bucket?

Add the S3ReadPolicy template to the Lambda function's execution role

Reference a second Lambda authorizer function

Add a custom S3 bucket policy to the Lambda function

Create an Amazon Simple Queue Service (SQS) topic for only S3 object reads Reference the topic in the template

Add the S3ReadPolicy template to the Lambda function's execution role

A developer is creating an application that is based on an AWS Lambda function. The function uses the AWS SDK to read product price data from an Amazon S3 bucket and to write user information to an Amazon Aurora DB instance The Lambda function runs often, up to a few times each minute To meet performance requirements, the developer must minimize the run duration of the Lambda function Which actions can help the developer increase the performance? (Select TWO)

Initialize SDK clients and database connections outside of the function handler

Use environment variables to pass operational parameters to the function.

Initialize SDK clients and database connections outside of the function handler

Read the S3 product price data initially and cache it locally in the /imp directory

Use environment variables to pass operational parameters to the function.

Use most-restrictive permissions when setting the 1AM policies for the Lambda 1AM role

Split the code into different Lambda functions to keep the functions smaller

A company has a three-tier application that is deployed in Amazon Elastic Container Service (Amazon ECS). The application is using an Amazon RDS for MySQL DB Instance The application performs more database reads than writes. During times of peak usage. the application's performance degrades. When this performance degradation occurs, the DB instance's ReadLatency metric in Amazon CloudWatch increases suddenly How should a developer modify the application to improve performance?

Use Amazon ElastiCache to cache query results

Scale the ECS cluster to contain more ECS instances

Add read capacity units (RCUs) to the DB instance.

Modify the ECS task definition to increase the task memory

A developer must cache dependent artifacts from Maven Central, a public package repository, as part of an application's build pipeline. The build pipeline has an AWS CodeArtifact repository where artifacts of the build are published. The developer needs a solution that requires minimum changes to the build pipeline Which solution meets these requirements?

Modify the CodeArtifact repository resource policy to allow artifacts to be fetched from the public package repository

Modify the existing CodeArtifact repository to associate an upstream repository with the public package repository

Create a new CodeArtifact repository that has an external connection to the public package repository

Create a new CodeArtifact domain that contains a new repository that has an external connection to the public package repository

Modify the CodeArtifact repository resource policy to allow artifacts to be fetched from the public package repository

A developer is developing an application that uses signed requests (Signature Version 4) to call other AWS services The developer has created a canonical request, has created the string to sign, and has calculated signing information Which methods could the developer use to complete a signed request? (Select TWO)

Add the signature to a query string parameter that is named X-Amz-Signature

Add the signature to an HTTP header that is named WWW-Authenticate

Add the signature to an HTTP header that is named Authorization

Add the signature to a session cookie

Add the signature to an HTTP header that 15 named Authentication

Add the signature to a query string parameter that is named X-Amz-Signature

Add the signature to an HTTP header that is named WWW-Authenticate

An application uploads photos to an Amazon S3 bucket. Each photo that is uploaded to the S3 bucket must be resized to a thumbnail image by the application Each thumbnail image is uploaded with a new name in the same S3 bucket. Which AWS service can a developer configure to directly process each single S3 event (or each S3 object upload?

Amazon Elastic Container Service (Amazon ECS)

Amazon DVA-C01 Practice Test 12 - Free Online Exam Prep & Questions

A developer is attempting to use the Amazon S3 PutObject API operation to upload an object to an S3 bucket that has default encryption enabled. The developer receives a 400 Bad Request error. What is the MOST likely cause of this error?

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Amazon DVA-C01 Practice Test 12

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Amazon DVA-C01 Practice Tests

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