A developer registered an AWS Lambda function as a target for an Application Load Balancer (ALB) using a CLI command. However, the Lambda function is not being invoked when the client sends requests through the ALB. Why is the Lambda function not being invoked?

The permissions to invoke the Lambda function are missing

A Lambda function cannot be registered as a target for an ALB

A Lambda function can be registered with an ALB using AWS Management Console only

The permissions to invoke the Lambda function are missing

Cross-zone is not enabled on the ALB

A company has implemented AWS CodePipeline to automate its release pipelines The development team is writing an AWS Lambda function that will send notifications for state changes of each of the actions in the stages. Which steps must be taken to associate the Lambda function with the event source?

Create an event trigger and specify the Lambda function from the CodePipeline console.

Create a trigger that invokes the Lambda function from the Lambda console by selecting CodePipeline as the event source

Create an event trigger and specify the Lambda function from the CodePipeline console.

Create an Amazon CloudWatch alarm that monitors status changes in CodePipeline and triggers the Lambda function

Create an Amazon CloudWatch Events rule that uses CodePipeline as an event source.

A developer is preparing a deployment package using AWS Cloud Formation. The package consists of two separate templates: one for the infrastructure and one for the application. The application has to be inside the VPC that is created from the infrastructure template How can the application stack refer to the VPC created from the infrastructure template?

Use the Ret function to import the VPC into the application stack from the infrastructure template

Use the export flag in the infrastructure template, and then use the Fn::lmportValue function in the application template

Use the DependsOn attribute to specify that the application instance depends on the VPC in the application template

Use the Fn::GetAtt function to include the attribute of the VPC in the application template.

A company s website runs on an Amazon EC2 instance and uses Auto Scale the environment during peak times Website users across the world are experiencing high to sea latency due to static content on the EC2 instance, even during non-peak hours.Which combination of steps will resolve the latency issue? (Select TWO )

Scale vertically by resizing the EC2 instances

Create an Amazon CloudFront distribution to cache the static content

Double the Auto Scaling group's maximum number of servers.

Host the application code on AWS Lambda

Scale vertically by resizing the EC2 instances

Create an Amazon CloudFront distribution to cache the static content

Store the application's static content in Amazon S3

A developer is writing an application that will process data delivered into an Amazon S3 bucket. The data is delivered approximately 10 times a day, and the developer expects the data will be processed in less than 1 minute, on average. How can the developer deploy and invoke the application with the lowest cost and lowest latency?

Deploy the application as an AWS Lambda function and invoke it with an Amazon CloudWatch alarm triggered by an S3 object upload

Deploy the application as an AWS Lambda function and invoke it with an S3 event notification

Deploy the application as an AWS Lambda function and invoke it with an Amazon CloudWatch scheduled event

Deploy the application onto an Amazon EC2 instance and have it poll the S3 bucket for new objects.

A developer is testing an application that invokes an AWS Lambda function asynchronously During the testing phase, the Lambda function fails to process after two retries How can the developer troubleshoot the failure?

Configure AWS CloudTrail logging to investigate the invocation failures

Configure Dead Letter Queues by sending events to Amazon SQS for investigation.

Configure Amazon Simple Workflow Service to process any direct unprocessed events

Configure AWS Config to process any direct unprocessed events

A developer needs temporary access to resources in a second accountWhat is the MOST secure way to achieve this?

Create a cross-account access role, and use sts:AssumeRcie API to get short-lived credentials

Use the Amazon Cognito user pools to get short-lived credentials for the second account

Create a dedicated IAM access key for the second account, and send it by mail.

Create a cross-account access role, and use sts:AssumeRcie API to get short-lived credentials

Establish trust, and add an SSH key for the second account to the IAM user

A developer is updating an application deployed on AWS Elastic Beanstalk The new version is incompatible with the old version To successfully deploy the update, a full cutover to the new updated version must be performed on all instances at one time, with the ability to roll back changes in case of a deployment failure in the new version How can this be performed with the LEAST amount of downtime?

Deploy the new version in a new Elastic Beanstalk environment and swap environment URLs

Use the Elastic Beanstalk All at once deployment policy to update all instances simultaneously

Perform an Elastic Beanstalk Rolling with additional batch deployment

Deploy the new version in a new Elastic Beanstalk environment and swap environment URLs

Perform an Elastic Beanstalk Rolling deployment

A developer is setting up Amazon API Gateway for their company's products The API will be used by registered developers to query and update their environments. The company wants to limit the amount of requests end users can send for both cost and security reasons Management wants to offer registered developers the option of buying larger packages that allow for more requests. How can the developer accomplish this with the LEAST amount of overhead management?

Set up a default usage plan, specify values for the rate and burst capacity, and associate it with a stage, if a registered user chooses a larger package, create a custom plan with the appropriate values and associate the plan with the user

Enable throttling for the API Gateway stage. Set a value for both the rate and burst capacity. If a registered user chooses a larger package, create a stage for them, adjust the values, and share the new URL with them.

Set up Amazon CloudWatch API logging in API Gateway Create a filter based on the user and request Time fields and create an alarm on this filter Write an AWS Lambda function to analyze the values and requester information, and respond accordingly Set up the function as the target for the alarm If a registered user chooses a larger package, update the Lambda code with the values.

Enable Amazon CloudWatch metrics for the API Gateway stage Set up CloudWatch alarms based off the Count metric and the ApiName, Method, Resource, and Stage dimensions to alerts when request rates pass the threshold Set the alarm action to Deny If a registered user chooses a larger package create a user-specific alarm and adjust the values

Set up a default usage plan, specify values for the rate and burst capacity, and associate it with a stage, if a registered user chooses a larger package, create a custom plan with the appropriate values and associate the plan with the user

A developer is refactoring a monolithic application. The application takes a POST request and performs several operations. Some of the operations are in parallel while others run sequentially. These operations have been refactored into individual AWS Lambda functions. The POST request will be processed by Amazon API Gateway. How should the developer invoke the Lambda functions in the same sequence using API Gateway*?

Use Amazon SQS to invoke the Lambda functions

Use an AWS Step Functions activity to run the Lambda functions

Use Amazon SNS to trigger the Lambda functions

Use an AWS Step Functions state machine to orchestrate the Lambda functions.

A company has a legacy application that was migrated to a fleet of Amazon EC2 instances. The application stores data in a MySQL database that is currently installed on a single EC2 instance The company has decided to migrate the database from the EC2 instance to MySQL on Amazon RDS.What should the developer do to update the application to support data storage in Amazon RDS?

Update the database connection parameters in the application to point to the new RDS instance

Add a script to the EC2 instance that implements an AWS SDK for requesting database credentials.

Create a new EC2 instance with an IAM role that allows access to the new RDS database

Create an AWS Lambda function that will route traffic from the EC2 instance to the RDS database.

A company is adding stored value for gift card) capability to its highly popular casual gaming website. Users need to be able to trade this value for other users' items on the platform. This would require both users' records be updated as a single transaction, or both users' records to be completely rolled back. Which AWS database options can provide the transactional capability required for this new feature?(Select TWO )

Amazon Aurora MySQL with operations made within a transaction block

Amazon DynamoDB with reads and writes made using Transact" operations

Amazon DynamoDB with operations made with the ConsistentRead parameter set to true

Amazon ElastiCache for Memcached with operations made within a transaction block

Amazon Aurora MySQL with operations made within a transaction block

Amazon DynamoDB with reads and writes made using Transact" operations

Amazon Redshift with operations made within a transaction block

A developer is implementing authentication and authorization for an application. The developer needs to ensure that the user credentials are never exposed. Which approach should the developer take to meet this requirement?

Use Amazon Cognito to configure a user pool, and use the Cognito API to authenticate and authorize the users.

Store the user credentials In Amazon DynamoDB Build an AWS Lambda function to validate the credentials and authorize users

Deploy a custom authentication and authorization API on an Amazon EC2 instance. Store the user credentials in Amazon S3 and encrypt the credentials using Amazon S3 server-side encryption.

Use Amazon Cognito to configure a user pool, and use the Cognito API to authenticate and authorize the users.

Store the user credentials In Amazon RDS Enable the encryption option for the Amazon RDS D8 instances Build an API using AWS Lambda to validate the credentials and authorize users

A developer has written a serverless application and wants to deploy it to AWS Lambda to leverage the function's multi-threaded execution to improve performance. Which action should the developer take to achieve these requirements?

Increase the memory allocation of the Lambda function

increase the Lambda function execution timeout

Use unreserved account concurrency.

Increase the memory allocation of the Lambda function

Set the reserved concurrency of the Lambda function to a higher number

A developer is migrating code to an AWS Lambda function that will access an Amazon Aurora MySQL database. What is the MOST secure way to authenticate the function to the database?

Store the database credentials in AWS Secrets Manager Let Secrets Manager handle the rotation of the credentials, as required

Store the database credentials as encrypted parameters in AWS Systems Manager Parameter Store Obtain the credentials from Systems Manager when the Lambda function needs to connect to the database

Store the database credentials in AWS Secrets Manager Let Secrets Manager handle the rotation of the credentials, as required

Store the database credentials in an Amazon S3 bucket that has a restrictive bucket policy for the Lambda role only when accessing the credentials Use AWS KMS to encrypt the data

Create a policy with rds-db connect access to the database and attach it to the role assigned to the Lambda function

A company has a two-tier application running on an Amazon EC2 server that handles all of its AWS based e-commerce activity During peak times, the backend servers that process orders are overloaded with requests. This results in some orders failing to process. A developer needs to create a solution that will re-factor the application. Which steps will allow for more flexibility during peak times, while still remaining cost-effective?(Select TWO.)

Use an Amazon SNS queue to decouple the front-end and backend servers.

Migrate the backend servers to on-premises and pull from an Amazon SNS queue

Increase the backend T2 EC2 instance sees to xl to handle the largest possible load throughout the year

implement an Amazon SQS queue to decouple the front-end and backend servers

Use an Amazon SNS queue to decouple the front-end and backend servers.

Migrate the backend servers to on-premises and pull from an Amazon SNS queue

Modify the backend servers to pull from an Amazon SQS queue.

A developer is creating a new application that will be accessed by users through an API created using Amazon API Gateway The users need to be authenticated by a third-party Security Assertion Markup Language (SAML) identity provider Once authenticated, users will need access to other AWS services such as Amazon S3 and Amazon DynamoDB How can these requirements be met?

Use Amazon Cognito Identity pools with a SAML identity provider as one of the authentication providers

Use an Amazon Cognito user pool with SAML as the resource server

Use Amazon Cognito Identity pools with a SAML identity provider as one of the authentication providers

Use the AWS IAM service to provide the sign-up and sign-in functionality.

Use Amazon CloudFront signed URLs to connect with the SAML identity provider

A development team is creating a new application designed to run on AWS. While the test and production environments will run on Amazon EC2 instances, developers will each run their own environment on their laptops. Which of the following is the simplest and MOST secure way to access AWS services from the local development machines?

Use an IAM role to assume a role and execute API calls using the role.

Create an IAM user to be shared with the entire development team, provide the development team with the access key.

Create an IAM user for each developer on the team: provide each developer with a unique access key

Set up a federation through an Amazon Cognito user pool.

A developer has discovered that an application responsible for processing messages in an Amazon SQS queue is routinely falling behind. The application is capable of processing multiple messages in one execution, but is only receiving one message at a time What should the developer do to increase the number of messages the application receives?

Call the ChangeMessageVisibility API for the queue and set MaxNumberOfMessages to a value greater than the default of 1.

Call the AddPermission API to set MaxNumberOfMessages for the ReceiveMessage action to a value greater than the default of 1.

Call the ReceiveMessage API to set MaxNumberOfMessages to a value greater than the default of 1

Call the SetQueueAttributes API for the queue and set MaxNumberOfMessages to a value greater than the default of 1.

A front-end web application is using Amazon Cognito user pools to handle the user authentication flow. A developer is integrating Amazon DynamoDB into the application using the AWS SDK for JavaScript How would the developer securely call the API without exposing the access or secret keys?

Hardcode the credentials use Amazon S3 to host the web application, and enable server-side encryption

Configure Amazon Cognito identity pools and exchange the JSON Web Token (JWT) for temporary credentials

Run the web application in an Amazon EC2 instance with the instance profile configured

Hardcode the credentials use Amazon S3 to host the web application, and enable server-side encryption

Use Amazon Cognito user pool JSON Web Tokens (JWTs) to access the DynamoDB APIs.

A developer uses Amazon S3 buckets for static website hosting. The developer creates one S3 bucket for the code and another S3 bucket for the assets, such as image and video files. Access is denied when a user attempts to access the assets bucket from the code bucket, with the website application showing a 403 error How should the developer solve this issue?

Edit the cross-origin resource sharing (CORS) configuration of the assets bucket to allow any origin to access the assets

Create an IAM role and apply it to the assets bucket for the code bucket to be granted access

Edit the bucket policy of the assets bucket to open access to all principals

Edit the cross-origin resource sharing (CORS) configuration of the assets bucket to allow any origin to access the assets

Change the code bucket to use AWS Lambda functions instead of static website hosting.

A software company needs to make sure user-uploaded documents are securely stored in Amazon S3. The documents must be encrypted at rest in Amazon S3. The company does not want to manage the security infrastructure in-house, but the company still needs extra protection to ensure it has control over its encryption keys due to industry regulations Which encryption strategy should a developer use to meet these requirements?

Server-side encryption with Amazon S3 managed keys (SSE-S3)

Server-side encryption with customer-provided encryption keys (SSE-C)

Server-side encryption with AWS KMS managed keys (SSE-KMS)

A company is managing a NoSQL database on-premises to host a critical component of an application, which is starting to have scaling issues. The company wants to migrate the application to Amazon DynamoDB with the following considerations:• Optimize frequent queries• Reduce read latencies• Plan for frequent queries on certain key attributes of the tableWhich solution would help achieve these objectives?

Create global secondary indexes on keys that are frequently queried Add the necessary attributes into the indexes.

Create local secondary indexes on keys that are frequently queried DynamoDB will fetch needed attributes from the table .

Create DynamoDB global tables to speed up query responses Use a scan to fetch data from the table.

Create an AWS Auto Scaling policy for the DynamoDB table

A company's ecommerce website is experiencing massive traffic spikes, which are causing performance problems in the company database. Users are reporting that accessing the website takes a long time A developer wants to implement a caching layer using Amazon ElastiCache. The website is required to be responsive no matter which product a user views, and the updates to product information and prices must be strongly consistent

Write to the backend first and invalidate the cache

Which cache writing policy will satisfy these requirements?

Write to the cache directly and sync the backend at a later time.

Write to the backend first and wait for the cache to expire.

Write to the cache and the backend at the same time

Write to the backend first and invalidate the cache

A developer is working on a serverless project based in Jav a. Initial testing shows a cold start takes about 8 seconds on average for AWS Lambda functions. What should the developer do to reduce the cold start time'' (Select TWO)

Reduce the deployment package by including only the needed modules from the AWS SDK for Java.

Increase the memory allocation setting for the Lambda function.

Add the Spring Framework to the project and enable dependency injection

Reduce the deployment package by including only the needed modules from the AWS SDK for Java.

Increase the memory allocation setting for the Lambda function.

Increase the timeout setting for the Lambda function.

Change the Lambda invocation mode from synchronous to asynchronous.

An application is using a custom library to make HTTP calls directly to AWS service endpoints. Theapplication is experiencing transient errors that are causing processes to stop when each error is firstencountered A request has been made to make the application more resilient by adding error retriesand exponential backoff.How should a developer implement the changes with MINIMAL custom code?

Use an AWS SDK and set retry-specific configurations.

Add a Retry-After HTTP header to API requests.

Use the AWS CLI to configure the retry settings in a named profile

Change the custom library to retry on 5xx errors only

Use an AWS SDK and set retry-specific configurations.

An application is processing clickslream data using Amazon Kinesis. The clickstream data feed into Kinesis experiences periodic spikes. The PutRecords API call occasionally fails and the logs show that the failed call returns the response shown below. Which techniques will help mitigate this exception? (Select TWO.)

Implement retries with exponential backoff

Reduce the frequency and/or size of the requests

Implement retries with exponential backoff

Use a PutRecord API instead of PutRecords

Reduce the frequency and/or size of the requests

Use Amazon SNS instead of Kinesis.

Reduce the number of KCL consumers.

A company's fleet of Amazon EC2 instances receives data from millions of users through an API. The servers batch the data, add an object for each user, and upload the objects to an S3 bucket to ensure high access rates The object attributes are Customer ID, Server ID, TS-Server (TimeStamp and Server ID) the size of the object, and a timestamp A developer wants to find all the objects for a given user collected during a specified time range After creating an S3 object created event, how can the developer achieve this requirement^

Execute an AWS Lambda function in response to the S3 object creation events that creates an Amazon DynamoDB record for every object with the Customer ID as the partition key and TS-Server as the sort key Retrieve all the records using the Customer ID and TS-Server attributes

Execute an AWS Lambda function in response to the S3 object creation events that creates an Amazon DynamoDB record for every object with the Customer ID as the partition key and the Server ID as the sort key Retrieve all the records using the Customer ID and Server ID attributes

Execute an AWS Lambda function in response to the S3 object creation events that creates an Amazon Redshift record for every object with the Customer ID as the partition key and TS-Server as the sort key Retrieve all the records using the Customer ID and TS-Server attributes

Execute an AWS Lambda function in response to the S3 object creation events that creates an Amazon DynamoDB record for every object with the Customer ID as the partition key and TS-Server as the sort key Retrieve all the records using the Customer ID and TS-Server attributes

Execute an AWS Lambda function in response to the S3 object creation events that creates an Amazon Redshift record for every object with the Customer ID as the partition key and the Server ID as the sort key. Retrieve all the records using the Customer ID and Server ID attributes.

A development team decides to adopt a continuous integration/continuous delivery (CI/CD) process using AWS CodePipehne and AWS CodeCommit for a new application. However, management wants a person to review and approve the code before it is deployed to production How can the development team add a manual approver to the CI/CD pipeline?

Add an approval action to the pipeline. Configure the approval action to publish to an Amazon SNS topic when approval is required. The pipeline execution will stop and wait for an approval

Use AWS SES to send an email to approvers when their action is required Develop a simple application that allows approvers to accept or reject a build Invoke an AWS Lambda function to advance the pipeline when a build is accepted

If approved, add an approved tag when pushing changes to the CodeCommit repository.CodePipeiine will proceed to build and deploy approved commits without interruption

Add an approval step to CodeCommit Commits will not be saved until approved.

Add an approval action to the pipeline. Configure the approval action to publish to an Amazon SNS topic when approval is required. The pipeline execution will stop and wait for an approval

A developer is building an application integrating an Amazon API Gateway with an AWS Lambda function. When calling the API, the developer receives the following error. Wed Nov 03 01:13:00 UTC 2017 : Method completed with status:502 What should the developer do to resolve the error?

Change the format of the Lambda function response to the API call.

Change the HTTP endpoint of the API to an HTTPS endpoint.

Change the format of the payload sent to the API Gateway.

Change the format of the Lambda function response to the API call.

Change the authorization header in the API call to access the Lambda function.

A developer has built a market application that stores pricing data in Amazon DynamoDB with Amazon ElastiCache in front. The prices of items in the market change frequently Sellers have begun complaining that, after they update the price of an item, the price does not actually change in the product listing What could be causing this issue?

The cache is not being invalidated when the price of the item is changed

The price of the item is being retrieved using a write-through ElastiCache cluster

The DynamoDB table was provisioned with insufficient read capacity

The DynamoDB table was provisioned with insufficient write capacity.

A development team uses AWS Elastic Beanstalk for application deployment. The team has configured the application version lifecycle policy to limit the number of application versions to 25 However even with the lifecycle policy the source bundle is deleted from the Amazon S3 source bucket What should a developer do in the Elastic Beanstalk application version lifecycle settings to retain the source code in the S3 bucket?

Change the Set the application version limit by age setting to zero.

Change the Set the application versions limit by total count setting to zero.

Disable the Lifecycle policy setting

Change the Set the application version limit by age setting to zero.

Set Retention to Retain source bundle in S3.

A development team is building a new application that will run on Amazon EC2 and use Amazon DynamoDB as a storage layer The developers all have assigned IAM user accounts in the same IAM group The developers currently can launch EC2 instances and they need to be able to launch EC2 instances with an instance role allowing access to Amazon DynamoDB. Which AWS I AM changes are needed when creating an instance role to provide this functionality^

Create an IAM permission policy attached to the role that allows access to Amazon EC2 Add a trust policy to the role that allows DynamoDB to assume the role Attach a permissions policy to the development group in AWS IAM that allows developers to use the IAM PassRole permission for the role

Create an IAM permission policy attached to the role that allows access to DynamoDB Add a trust policy to the role that allows DynamoDB to assume the role Attach a permissions policy to the development group in AWS IAM that allows developers to use the IAM GetRole and IAM PassRole permissions for the role

Create an IAM permissions policy attached to the role that allows access to DynamoDB Add a trust policy to the role that allows Amazon EC2 to assume the role Attach a permissions policy to the development group in AWS IAM that allows developers to use the IAM PassRole permission for the role

Create an IAM permission policy attached to the role that allows access to Amazon EC2 Add a trust policy to the role that allows DynamoDB to assume the role Attach a permissions policy to the development group in AWS IAM that allows developers to use the IAM PassRole permission for the role

Create an IAM permissions policy attached to the role that allows access to DynamoDB Add a trust policy to the role that allows Amazon EC2 to assume the role Attach a permissions policy to the development group in AWS IAM that allows developers to use the iam GetRole permission for the role.

A company has a web application that uses an Amazon Cognito user pool for authentication. The company wants to create a login page with the company logo. What should a developer do to meet these requirements?

Create a hosted user interface in Amazon Cognito and customize it with the company logo

Create a login page with the company logo and upload it to Amazon Cognito

Create a login page in Amazon API Gateway with the logo and save the link in Amazon Cognito.

Upload the logo to the Amazon Cognito app settings and point to the logo on a custom login page

A company is building a compute-intensive application that will run on a fleet of Amazon EC2 instances. The application uses attached Amazon EBS disks for storing dat a. The application will process sensitive information and all the data must be encrypted.What should a developer do to ensure the data is encrypted on disk without impacting performance?

Configure the Amazon EC2 instance fleet to use encrypted EBS volumes for storing data

Add logic to write all data to an encrypted Amazon S3 bucket

Add a custom encryption algorithm to the application that will encrypt and decrypt all data

Create a new Amazon Machine Image (AMI) with an encrypted root volume and store the data to ephemeral disks.

A developer is building a serverless application using AWS Lambda and must create a REST API using an HTTP GET method What needs to be defined to meet this requirement? (Select TWO )

An Amazon API Gateway with a Lambda function

An exposed GET method in Amazon Route 53

An Amazon API Gateway with a Lambda function

An exposed GET method in an Amazon API Gateway ID.

An exposed GET method in the Lambda function

An exposed GET method in Amazon Route 53

A developer is trying to monitor an application's status by running a cron job that returns 1 if the service is up and 0 if the service is down. The developer created code that uses an AWS CLI putmetric- alarm command to publish the custom metrics to Amazon CloudWatch and create an alarm However the developer is unable to create an alarm as the custom metrics do not appear m the CloudWatch console. What is causing this issue?

The developer needs to use the put-metric-data command.

Sending custom metrics using the CLI is not supported

The developer needs to use the put-metric-data command.

The developer must use a unified CloudWatch agent to publish custom metrics

The code is not running on an Amazon EC2 instance

Amazon DVA-C01 Practice Test 9 - Free Online Exam Prep & Questions

A company is developing a report executed by AWS Step Functions Amazon CloudWatch shows errors in the Step Functions task state machine To troubleshoot each task, the state input needs to be included along with the error message in the state output.

Which coding practice can preserve both the original input and the error for the state?

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Amazon DVA-C01 Practice Test 9

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Amazon DVA-C01 Practice Tests

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