Quiz IT certification exam

Question 1

A developer is creating an application that will be deployed on IoT devices. The application will send data to a RESTful API that is deployed as an AWS Lambda function. The application will assign each API request a unique identifier. The volume of API requests from the application can randomly increase at any given time of day.

During periods of request throttling, the application might need to retry requests. The API must be able to handle duplicate requests without inconsistencies or data loss.

Which solution will meet these requirements?

Accepted Answer

Create an Amazon DynamoDB table. Store the unique identifier for each request in the table.Modify the Lambda function to check the table for the identifier before processing the request.

Answer

Create an Amazon RDS for MySQL DB instance. Store the unique identifier for each request in a database table. Modify the Lambda function to check the table for the identifier before processing the request.

Answer

Create an Amazon DynamoDB table. Store the unique identifier for each request in the table. Modify the Lambda function to return a client error response when the function receives a duplicate request.

Answer

Create an Amazon ElastiCache for Memcached instance. Store the unique identifier for each request in the cache. Modify the Lambda function to check the cache for the identifier before processing the request.

Question 2

A developer wants to expand an application to run in multiple AWS Regions. The developer wants to copy Amazon Machine Images (AMIs) with the latest changes and create a new application stack in the destination Region. According to company requirements, all AMIs must be encrypted in all Regions. However, not all the AMIs that the company uses are encrypted.How can the developer expand the application to run in the destination Region while meeting the encryption requirement?

Accepted Answer

Create new AMIs, and specify encryption parameters. Copy the encrypted AMIs to the destination Region. Delete the unencrypted AMIs.

Answer

Use AWS Key Management Service (AWS KMS) to enable encryption on the unencrypted AMIs. Copy the encrypted AMIs to the destination Region.

Answer

Use AWS Certificate Manager (ACM) to enable encryption on the unencrypted AMIs. Copy the encrypted AMIs to the destination Region.

Answer

Copy the unencrypted AMIs to the destination Region. Enable encryption by default in the destination Region.

Question 3

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?

Accepted Answer

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.

Answer

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

Answer

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

Answer

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.

Question 4

An application is processing clickstream 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:<img alt="Amazon DVA-C02 image Question 44 4410 09162024005638000000"   width="743" height="418" src="https://examgecko.com/getfile/592f44bc-ca94-4917-adcd-c4e694323d13">Which techniques will help mitigate this exception? (Choose two.)

Accepted Answer

Implement retries with exponential backoff.

Accepted Answer

Reduce the frequency and/or size of the requests.

Answer

Use a PutRecord API instead of PutRecords.

Answer

Use Amazon SNS instead of Kinesis.

Answer

Reduce the number of KCL consumers.

Question 5

A company has an Amazon S3 bucket that contains sensitive dat a. The data must be encrypted in transit and at rest. The company encrypts the data in the S3 bucket by using an AWS Key Management Service (AWS KMS) key. A developer needs to grant several other AWS accounts the permission to use the S3 GetObject operation to retrieve the data from the S3 bucket.How can the developer enforce that all requests to retrieve the data provide encryption in transit?

Accepted Answer

Define a resource-based policy on the S3 bucket to deny access when a request meets the condition "aws:SecureTransport": "false".

Answer

Define a resource-based policy on the S3 bucket to allow access when a request meets the condition "aws:SecureTransport": "false".

Answer

Define a role-based policy on the other accounts' roles to deny access when a request meets the condition of "aws:SecureTransport": "false".

Answer

Define a resource-based policy on the KMS key to deny access when a request meets the condition of "aws:SecureTransport": "false".

Question 6

An application that is hosted on an Amazon EC2 instance needs access to files that are stored in an Amazon S3 bucket. The application lists the objects that are stored in the S3 bucket and displays a table to the user. During testing, a developer discovers that the application does not show any objects in the list.What is the MOST secure way to resolve this issue?

Accepted Answer

Update the IAM instance profile that is attached to the EC2 instance to include the S3:ListBucket permission for the S3 bucket.

Answer

Update the IAM instance profile that is attached to the EC2 instance to include the S3:* permission for the S3 bucket.

Answer

Update the developer's user permissions to include the S3:ListBucket permission for the S3 bucket.

Answer

Update the S3 bucket policy by including the S3:ListBucket permission and by setting the Principal element to specify the account number of the EC2 instance.

Question 7

A company is planning to securely manage one-time fixed license keys in AWS. The company's development team needs to access the license keys in automaton scripts that run in Amazon EC2 instances and in AWS CloudFormation stacks.Which solution will meet these requirements MOST cost-effectively?

Accepted Answer

AWS Systems Manager Parameter Store SecureString parameters

Answer

Amazon S3 with encrypted files prefixed with "config"

Answer

AWS Secrets Manager secrets with a tag that is named SecretString

Answer

CloudFormation NoEcho parameters

Question 8

A company has deployed infrastructure on AWS. A development team wants to create an AWS Lambda function that will retrieve data from an Amazon Aurora database. The Amazon Aurora database is in a private subnet in company's VPC. The VPC is named VPC1. The data is relational in nature. The Lambda function needs to access the data securely.Which solution will meet these requirements?

Accepted Answer

Create the Lambda function. Configure VPC1 access for the function. Attach a security group named SG1 to both the Lambda function and the database. Configure the security group inbound and outbound rules to allow TCP traffic on Port 3306.

Answer

Create and launch a Lambda function in a new public subnet that is in a new VPC named VPC2. Create a peering connection between VPC1 and VPC2.

Answer

Create the Lambda function. Configure VPC1 access for the function. Assign a security group named SG1 to the Lambda function. Assign a second security group named SG2 to the database. Add an inbound rule to SG1 to allow TCP traffic from Port 3306.

Answer

Export the data from the Aurora database to Amazon S3. Create and launch a Lambda function in VPC1. Configure the Lambda function query the data from Amazon S3.

Question 9

A developer is building a web application that uses Amazon API Gateway to expose an AWS Lambda function to process requests from clients. During testing, the developer notices that the API Gateway times out even though the Lambda function finishes under the set time limit.Which of the following API Gateway metrics in Amazon CloudWatch can help the developer troubleshoot the issue? (Choose two.)

Accepted Answer

IntegrationLatency

Accepted Answer

Latency

Answer

CacheHitCount

Answer

CacheMissCount

Answer

Count

Question 10

A development team wants to build a continuous integration/continuous delivery (CI/CD) pipeline. The team is using AWS CodePipeline to automate the code build and deployment. The team wants to store the program code to prepare for the CI/CD pipeline.Which AWS service should the team use to store the program code?

Accepted Answer

AWS CodeCommit

Answer

AWS CodeDeploy

Answer

AWS CodeArtifact

Answer

Amazon CodeGuru

Question 11

A developer is designing an AWS Lambda function that creates temporary files that are less than 10 MB during invocation. The temporary files will be accessed and modified multiple times during invocation. The developer has no need to save or retrieve these files in the future.Where should the temporary files be stored?

Accepted Answer

the /tmp directory

Answer

Amazon Elastic File System (Amazon EFS)

Answer

Amazon Elastic Block Store (Amazon EBS)

Answer

Amazon S3

Question 12

A developer is designing a serverless application with two AWS Lambda functions to process photos. One Lambda function stores objects in an Amazon S3 bucket and stores the associated metadata in an Amazon DynamoDB table. The other Lambda function fetches the objects from the S3 bucket by using the metadata from the DynamoDB table. Both Lambda functions use the same Python library to perform complex computations and are approaching the quota for the maximum size of zipped deployment packages.What should the developer do to reduce the size of the Lambda deployment packages with the LEAST operational overhead?

Accepted Answer

Create a Lambda layer with the required Python library. Use the Lambda layer in both Lambda functions.

Answer

Package each Python library in its own .zip file archive. Deploy each Lambda function with its own copy of the library.

Answer

Combine the two Lambda functions into one Lambda function. Deploy the Lambda function as a single .zip file archive.

Answer

Download the Python library to an S3 bucket. Program the Lambda functions to reference the object URLs.

Question 13

A developer is writing an AWS Lambda function. The developer wants to log key events that occur while the Lambda function runs. The developer wants to include a unique identifier to associate the events with a specific function invocation. The developer adds the following code to the Lambda function:<img alt="Amazon DVA-C02 image Question 53 4419 09162024005638000000"   width="299" height="73" src="https://examgecko.com/getfile/46ce748e-f240-4e85-8986-41a328445ed8">Which solution will meet this requirement?

Accepted Answer

Obtain the request identifier from the AWS request ID field in the context object. Configure the application to write logs to standard output.

Answer

Obtain the request identifier from the AWS request ID field in the event object. Configure the application to write logs to a file.

Answer

Obtain the request identifier from the AWS request ID field in the event object. Configure the application to write logs to standard output.

Answer

Obtain the request identifier from the AWS request ID field in the context object. Configure the application to write logs to a file.

Question 14

A developer is working on a serverless application that needs to 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 table?

Accepted Answer

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

Answer

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.

Answer

Create an Amazon EventBridge rule to invoke the Lambda function on a regular schedule. Conned to the DynamoDB table from the Lambda function to detect changes.

Answer

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

Question 15

An application uses an Amazon EC2 Auto Scaling group. A developer notices that EC2 instances are taking a long time to become available during scale-out events. The UserData script is taking a long time to run.The developer must implement a solution to decrease the time that elapses before an EC2 instance becomes available. The solution must make the most recent version of the application available at all times and must apply all available security updates. The solution also must minimize the number of images that are created. The images must be validated.Which combination of steps should the developer take to meet these requirements? (Choose two.)

Accepted Answer

Use EC2 Image Builder to create an Amazon Machine Image (AMI). Install the latest version of the application and all the patches and agents that are needed to manage and run the application. Update the Auto Scaling group launch configuration to use the AMI.

Accepted Answer

Remove any commands that perform operating system patching from the UserData script.

Answer

Use EC2 Image Builder to create an Amazon Machine Image (AMI). Install all the patches and agents that are needed to manage and run the application. Update the Auto Scaling group launch configuration to use the AMI.

Answer

Set up AWS CodeDeploy to deploy the most recent version of the application at runtime.

Answer

Set up AWS CodePipeline to deploy the most recent version of the application at runtime.

Question 16

A developer is creating an AWS Lambda function that needs credentials to connect to an Amazon RDS for MySQL database. An Amazon S3 bucket currently stores the credentials. The developer needs to improve the existing solution by implementing credential rotation and secure storage. The developer also needs to provide integration with the Lambda function.Which solution should the developer use to store and retrieve the credentials with the LEAST management overhead?

Accepted Answer

Store the credentials in AWS Secrets Manager. Set the secret type to Credentials for Amazon RDS database. Select the database that the secret will access. Use the default AWS Key ManagementService (AWS KMS) key to encrypt the secret. Enable automatic rotation for the secret. Use the secret from Secrets Manager on the Lambda function to connect to the database.

Answer

Store the credentials in AWS Systems Manager Parameter Store. Select the database that the parameter will access. Use the default AWS Key Management Service (AWS KMS) key to encrypt the parameter. Enable automatic rotation for the parameter. Use the parameter from Parameter Store on the Lambda function to connect to the database.

Answer

Encrypt the credentials with the default AWS Key Management Service (AWS KMS) key. Store the credentials as environment variables for the Lambda function. Create a second Lambda function to generate new credentials and to rotate the credentials by updating the environment variables of the first Lambda function. Invoke the second Lambda function by using an Amazon EventBridge rule that runs on a schedule. Update the database to use the new credentials. On the first Lambda function, retrieve the credentials from the environment variables. Decrypt the credentials by using AWS KMS, Connect to the database.

Answer

Encrypt the credentials by using AWS Key Management Service (AWS KMS). Store the credentials in an Amazon DynamoDB table. Create a second Lambda function to rotate the credentials. Invoke the second Lambda function by using an Amazon EventBridge rule that runs on a schedule. Update the DynamoDB table. Update the database to use the generated credentials. Retrieve the credentials from DynamoDB with the first Lambda function. Connect to the database.

Question 17

A developer has written the following IAM policy to provide access to an Amazon S3 bucket:<img alt="Amazon DVA-C02 image Question 57 4423 09162024005638000000"   width="579" height="354" src="https://examgecko.com/getfile/80364c89-8816-4682-bb5f-1c2bc70ae782">Which access does the policy allow regarding the s3:GetObject and s3:PutObject actions?

Accepted Answer

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

Answer

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

Answer

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

Answer

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"

Question 18

A developer is creating a mobile app that calls a backend service by using an Amazon API Gateway REST API. For integration testing during the development phase, the developer wants to simulate different backend responses without invoking the backend service.Which solution will meet these requirements with the LEAST operational overhead?

Accepted Answer

Use a request mapping template to select the mock integration response.

Answer

Create an AWS Lambda function. Use API Gateway proxy integration to return constant HTTP responses.

Answer

Create an Amazon EC2 instance that serves the backend REST API by using an AWS CloudFormation template.

Answer

Customize the API Gateway stage to select a response type based on the request.

Question 19

A developer has a legacy application that is hosted on-premises. Other applications hosted on AWS depend on the on-premises application for proper functioning. In case of any application errors, the developer wants to be able to use Amazon CloudWatch to monitor and troubleshoot all applications from one place.How can the developer accomplish this?

Accepted Answer

Download the CloudWatch agent to the on-premises server. Configure the agent to use IAM user credentials with permissions for CloudWatch.

Answer

Install an AWS SDK on the on-premises server to automatically send logs to CloudWatch.

Answer

Upload log files from the on-premises server to Amazon S3 and have CloudWatch read the files.

Answer

Upload log files from the on-premises server to an Amazon EC2 instance and have the instance forward the logs to CloudWatch.

Question 20

An Amazon Kinesis Data Firehose delivery stream is receiving customer data that contains personally identifiable information. A developer needs to remove pattern-based customer identifiers from the data and store the modified data in an Amazon S3 bucket.What should the developer do to meet these requirements?

Accepted Answer

Implement Kinesis Data Firehose data transformation as an AWS Lambda function. Configure the function to remove the customer identifiers. Set an Amazon S3 bucket as the destination of the delivery stream.

Answer

Launch an Amazon EC2 instance. Set the EC2 instance as the destination of the delivery stream.Run an application on the EC2 instance to remove the customer identifiers. Store the transformed data in an Amazon S3 bucket.

Answer

Create an Amazon OpenSearch Service instance. Set the OpenSearch Service instance as the destination of the delivery stream. Use search and replace to remove the customer identifiers. Export the data to an Amazon S3 bucket.

Answer

Create an AWS Step Functions workflow to remove the customer identifiers. As the last step in the workflow, store the transformed data in an Amazon S3 bucket. Set the workflow as the destination of the delivery stream.

Question 21

A developer is using an AWS Lambda function to generate avatars for profile pictures that are uploaded to an Amazon S3 bucket. The Lambda function is automatically invoked for profile pictures that are saved under the /original/ S3 prefix. The developer notices that some pictures cause the Lambda function to time out. The developer wants to implement a fallback mechanism by using another Lambda function that resizes the profile picture.Which solution will meet these requirements with the LEAST development effort?

Accepted Answer

Set the image resize Lambda function as a destination of the avatar generator Lambda function for the events that fail processing.

Answer

Create an Amazon Simple Queue Service (Amazon SQS) queue. Set the SQS queue as a destination with an on failure condition for the avatar generator Lambda function. Configure the image resize Lambda function to poll from the SQS queue.

Answer

Create an AWS Step Functions state machine that invokes the avatar generator Lambda function and uses the image resize Lambda function as a fallback. Create an Amazon EventBridge rule that matches events from the S3 bucket to invoke the state machine.

Answer

Create an Amazon Simple Notification Service (Amazon SNS) topic. Set the SNS topic as a destination with an on failure condition for the avatar generator Lambda function. Subscribe the image resize Lambda function to the SNS topic.

Question 22

A developer needs to migrate an online retail application to AWS to handle an anticipated increase in traffic. The application currently runs on two servers: one server for the web application and another server for the database. The web server renders webpages and manages session state in memory.The database server hosts a MySQL database that contains order details. When traffic to the application is heavy, the memory usage for the web server approaches 100% and the application slows down considerably.The developer has found that most of the memory increase and performance decrease is related to the load of managing additional user sessions. For the web server migration, the developer will use Amazon EC2 instances with an Auto Scaling group behind an Application Load Balancer.Which additional set of changes should the developer make to the application to improve the application's performance?

Accepted Answer

Use Amazon ElastiCache for Memcached to store and manage the session data. Use an Amazon RDS for MySQL DB instance to store the application data.

Answer

Use an EC2 instance to host the MySQL database. Store the session data and the application data in the MySQL database.

Answer

Use Amazon ElastiCache for Memcached to store and manage the session data and the application data.

Answer

Use the EC2 instance store to manage the session data. Use an Amazon RDS for MySQL DB instance to store the application data.

Question 23

An application uses Lambda functions to extract metadata from files uploaded to an S3 bucket; the metadata is stored in Amazon DynamoDB. The application starts behaving unexpectedly, and the developer wants to examine the logs of the Lambda function code for errors.Based on this system configuration, where would the developer find the logs?

Accepted Answer

Amazon CloudWatch

Answer

Amazon S3

Answer

AWS CloudTrail

Answer

Amazon DynamoDB

Question 24

A company is using an AWS Lambda function to process records from an Amazon Kinesis data stream. The company recently observed slow processing of the records. A developer notices that the iterator age metric for the function is increasing and that the Lambda run duration is constantly above normal.Which actions should the developer take to increase the processing speed? (Choose two.)

Accepted Answer

Increase the number of shards of the Kinesis data stream.

Accepted Answer

Increase the memory that is allocated to the Lambda function.

Answer

Decrease the timeout of the Lambda function.

Answer

Decrease the number of shards of the Kinesis data stream.

Answer

Increase the timeout of the Lambda function.

Question 25

A company needs to harden its container images before the images are in a running state. The company's application uses Amazon Elastic Container Registry (Amazon ECR) as an image registry.Amazon Elastic Kubernetes Service (Amazon EKS) for compute, and an AWS CodePipeline pipeline that orchestrates a continuous integration and continuous delivery (CI/CD) workflow.Dynamic application security testing occurs in the final stage of the pipeline after a new image is deployed to a development namespace in the EKS cluster. A developer needs to place an analysis stage before this deployment to analyze the container image earlier in the CI/CD pipeline.Which solution will meet these requirements with the MOST operational efficiency?

Accepted Answer

Create a new CodePipeline stage that occurs after the container image is built. Configure ECR basic image scanning to scan on image push. Use an AWS Lambda function as the action provider. Configure the Lambda function to check the scan results and to fail the pipeline if there are findings.

Answer

Build the container image and run the docker scan command locally. Mitigate any findings before pushing changes to the source code repository. Write a pre-commit hook that enforces the use of this workflow before commit.

Answer

Create a new CodePipeline stage that occurs after source code has been retrieved from its repository. Run a security scanner on the latest revision of the source code. Fail the pipeline if there are findings.

Answer

Add an action to the deployment stage of the pipeline so that the action occurs before the deployment to the EKS cluster. Configure ECR basic image scanning to scan on image push. Use an AWS Lambda function as the action provider. Configure the Lambda function to check the scan results and to fail the pipeline if there are findings.

Question 26

A developer is testing a new file storage application that uses an Amazon CloudFront distribution to serve content from an Amazon S3 bucket. The distribution accesses the S3 bucket by using an origin access identity (OAI). The S3 bucket's permissions explicitly deny access to all other users.The application prompts users to authenticate on a login page and then uses signed cookies to allow users to access their personal storage directories. The developer has configured the distribution to use its default cache behavior with restricted viewer access and has set the origin to point to the S3 bucket. However, when the developer tries to navigate to the login page, the developer receives a 403 Forbidden error.The developer needs to implement a solution to allow unauthenticated access to the login page. The solution also must keep all private content secure.Which solution will meet these requirements?

Accepted Answer

Add a second cache behavior to the distribution with the same origin as the default cache behavior. Set the path pattern for the second cache behavior to the path of the login page, and make viewer access unrestricted. Keep the default cache behavior's settings unchanged.

Answer

Add a second cache behavior to the distribution with the same origin as the default cache behavior. Set the path pattern for the second cache behavior to *, and make viewer access restricted. Change the default cache behavior's path pattern to the path of the login page, and make viewer access unrestricted.

Answer

Add a second origin as a failover origin to the default cache behavior. Point the failover origin to the S3 bucket. Set the path pattern for the primary origin to *, and make viewer access restricted. Set the path pattern for the failover origin to the path of the login page, and make viewer access unrestricted.

Answer

Add a bucket policy to the S3 bucket to allow read access. Set the resource on the policy to the Amazon Resource Name (ARN) of the login page object in the S3 bucket. Add a CloudFront function to the default cache behavior to redirect unauthorized requests to the login page's S3 URL.

Question 27

A developer is using AWS Amplify Hosting to build and deploy an application. The developer is receiving an increased number of bug reports from users. The developer wants to add end-to-end testing to the application to eliminate as many bugs as possible before the bugs reach production.Which solution should the developer implement to meet these requirements?

Accepted Answer

Add a test phase to the amplify.yml build settings for the application.

Answer

Run the amplify add test command in the Amplify CLI.

Answer

Create unit tests in the application. Deploy the unit tests by using the amplify push command in the Amplify CLI.

Answer

Add a test phase to the aws-exports.js file for the application.

Question 28

An ecommerce company is using an AWS Lambda function behind Amazon API Gateway as its application tier. To process orders during checkout, the application calls a POST API from the frontend. The POST API invokes the Lambda function asynchronously. In rare situations, the application has not processed orders. The Lambda application logs show no errors or failures.What should a developer do to solve this problem?

Accepted Answer

Create and inspect the Lambda dead-letter queue. Troubleshoot the failed functions. Reprocess the events.

Answer

Inspect the frontend logs for API failures. Call the POST API manually by using the requests from the log file.

Answer

Inspect the Lambda logs in Amazon CloudWatch for possible errors. Fix the errors.

Answer

Make sure that caching is disabled for the POST API in API Gateway.

Question 29

A company is building a web application on AWS. When a customer sends a request, the application will generate reports and then make the reports available to the customer within one hour. Reports should be accessible to the customer for 8 hours. Some reports are larger than 1 MB. Each report is unique to the customer. The application should delete all reports that are older than 2 days.Which solution will meet these requirements with the LEAST operational overhead?

Accepted Answer

Generate the reports and then store the reports in an Amazon S3 bucket that uses server-side encryption. Generate a presigned URL that contains an expiration date Provide the URL to customers through the web application. Add S3 Lifecycle configuration rules to the S3 bucket to delete old reports.

Answer

Generate the reports and then store the reports as Amazon DynamoDB items that have a specified TTL. Generate a URL that retrieves the reports from DynamoDB. Provide the URL to customers through the web application.

Answer

Generate the reports and then store the reports in an Amazon S3 bucket that uses server-side encryption. Attach the reports to an Amazon Simple Notification Service (Amazon SNS) message. Subscribe the customer to email notifications from Amazon SNS.

Answer

Generate the reports and then store the reports in an Amazon RDS database with a date stamp.Generate an URL that retrieves the reports from the RDS database. Provide the URL to customers through the web application. Schedule an hourly AWS Lambda function to delete database records that have expired date stamps.

Question 30

A company has deployed an application on AWS Elastic Beanstalk. The company has configured the Auto Scaling group that is associated with the Elastic Beanstalk environment to have five Amazon EC2 instances. If the capacity is fewer than four EC2 instances during the deployment, application performance degrades. The company is using the all-at-once deployment policy.What is the MOST cost-effective way to solve the deployment issue?

Accepted Answer

Change the deployment policy to rolling with additional batch. Specify a batch size of 1.

Answer

Change the Auto Scaling group to six desired instances.

Answer

Change the deployment policy to traffic splitting. Specify an evaluation time of 1 hour.

Answer

Change the deployment policy to rolling. Specify a batch size of 2.

Question 31

A developer is incorporating AWS X-Ray into an application that handles personal identifiable information (PII). The application is hosted on Amazon EC2 instances. The application trace messages include encrypted PII and go to Amazon CloudWatch. The developer needs to ensure that no PII goes outside of the EC2 instances.Which solution will meet these requirements?

Accepted Answer

Manually instrument the X-Ray SDK in the application code.

Answer

Use the X-Ray auto-instrumentation agent.

Answer

Use Amazon Macie to detect and hide PII. Call the X-Ray API from AWS Lambda.

Answer

Use AWS Distro for Open Telemetry.

Question 32

A developer is migrating some features from a legacy monolithic application to use AWS Lambda functions instead. The application currently stores data in an Amazon Aurora DB cluster that runs in private subnets in a VPC. The AWS account has one VPC deployed. The Lambda functions and the DB cluster are deployed in the same AWS Region in the same AWS account.The developer needs to ensure that the Lambda functions can securely access the DB cluster without crossing the public internet.Which solution will meet these requirements?

Accepted Answer

Configure the VPC, subnets, and a security group for the Lambda functions.

Answer

Configure the DB cluster's public access setting to Yes.

Answer

Configure an Amazon RDS database proxy for the Lambda functions.

Answer

Configure a NAT gateway and a security group for the Lambda functions.

Question 33

A developer is building a new application on AWS. The application uses an AWS Lambda function that retrieves information from an Amazon DynamoDB table. The developer hard coded the DynamoDB table name into the Lambda function code. The table name might change over time. The developer does not want to modify the Lambda code if the table name changes.Which solution will meet these requirements MOST efficiently?

Accepted Answer

Create a Lambda environment variable to store the table name. Use the standard method for the programming language to retrieve the variable.

Answer

Store the table name in a file. Store the file in the /tmp folder. Use the SDK for the programming language to retrieve the table name.

Answer

Create a file to store the table name. Zip the file and upload the file to the Lambda layer. Use the SDK for the programming language to retrieve the table name.

Answer

Create a global variable that is outside the handler in the Lambda function to store the table name.

Question 34

A company has installed smart motes in all Its customer locations. The smart meter's measure power usage at 1minute intervals and send the usage readings to a remote endpoint tot collection. The company needs to create an endpoint that will receive the smart meter readings and store the readings in a database. The company wants to store the location ID and timestamp information. The company wants to give Is customers low-latency access to their current usage and historical usage on demand The company expects demand to increase significantly. The solution must not impact performance or include downtime write seeing.When solution will meet these requirements MOST cost-effectively?

Accepted Answer

Store the smart motor readings m an Amazon DynamoDB table Croato a composite Key oy using the location ID and timestamp columns. Use the columns to filter on the customers' data.

Answer

Store the smart meter readings in an Amazon RDS database. Create an index on the location ID and timestamp columns Use the columns to filter on the customers 'data.

Answer

Store the smart meter readings in Amazon EastCache for Reds Create a Sorted set key y using the location ID and timestamp columns. Use the columns to filter on the customers' data.

Answer

Store the smart meter readings m Amazon S3 Parton the data by using the location ID and timestamp columns. Use Amazon Athena lo tiler on me customers' data.

Question 35

A developer has created an AWS Lambda function that makes queries to an Amazon Aurora MySQL DB instance. When the developer performs a test the OB instance shows an error for too many connections.Which solution will meet these requirements with the LEAST operational effort?

Accepted Answer

Create a proxy in Amazon RDS Proxy Query the proxy instead of the DB instance.

Answer

Create a read replica for the DB instance Query the replica DB instance instead of the primary DB instance.

Answer

Migrate the data lo an Amazon DynamoDB database.

Answer

Configure the Amazon Aurora MySQL DB instance tor Multi-AZ deployment.

Question 36

A company is building an application for stock trading. The application needs sub-millisecond latency for processing trade requests. The company uses Amazon DynamoDB to store all the trading data that is used to process each trading request A development team performs load testing on the application and finds that the data retrieval time is higher than expected. The development team needs a solution that reduces the data retrieval time with the least possible effort.Which solution meets these requirements'?

Accepted Answer

Use DynamoDB Accelerator (DAX) to cache the trading data.

Answer

Add local secondary indexes (LSis) for the trading data.

Answer

Store the trading data m Amazon S3 and use S3 Transfer Acceleration.

Answer

Add retries with exponential back off for DynamoDB queries.

Question 37

A developer is working on a Python application that runs on Amazon EC2 instances. The developer wants to enable tracing of application requests to debug performance issues in the code.Which combination of actions should the developer take to achieve this goal? (Select TWO)

Accepted Answer

Install the AWS X-Ray daemon on the EC2 instances.

Accepted Answer

Install and configure the AWS X-Ray SDK for Python in the application.

Answer

Install the Amazon CloudWatch agent on the EC2 instances.

Answer

Configure the application to write JSON-formatted togs to /var/log/cloudwatch.

Answer

Configure the application to write trace data to /Var/log-/xray.

Question 38

A company has an application that runs as a series of AWS Lambda functions. Each Lambda function receives data from an Amazon Simple Notification Service (Amazon SNS) topic and writes the data to an Amazon Aurora DB instance.To comply with an information security policy, the company must ensure that the Lambda functions all use a single securely encrypted database connection string to access Aurora.Which solution will meet these requirements'?

Accepted Answer

Use IAM database authentication for Aurora to enable secure database connections for ail the Lambda functions.

Answer

Store the credentials and read the credentials from an encrypted Amazon RDS DB instance.

Answer

Store the credentials in AWS Systems Manager Parameter Store as a secure string parameter.

Answer

Use Lambda environment variables with a shared AWS Key Management Service (AWS KMS) key for encryption.

Question 39

A developer is troubleshooting an Amazon API Gateway API Clients are receiving HTTP 400 response errors when the clients try to access an endpoint of the API.How can the developer determine the cause of these errors?

Accepted Answer

Turn on execution logging and access logging in Amazon CloudWatch Logs for the API stage. Create a CloudWatch Logs log group. Specify the Amazon Resource Name (ARN) of the log group for the API stage.

Answer

Create an Amazon Kinesis Data Firehose delivery stream to receive API call logs from API Gateway.Configure Amazon CloudWatch Logs as the delivery stream's destination.

Answer

Turn on AWS CloudTrail Insights and create a trail Specify the Amazon Resource Name (ARN) of the trail for the stage of the API.

Answer

Turn on AWS X-Ray for the API stage Create an Amazon CtoudWalch Logs log group Specify the Amazon Resource Name (ARN) of the log group for the API stage.

Question 40

A company developed an API application on AWS by using Amazon CloudFront. Amazon API Gateway, and AWS Lambd a. The API has a minimum of four requests every second A developer notices that many API users run the same query by using the POST method. The developer wants to cache the POST request to optimize the API resources.Which solution will meet these requirements'?

Accepted Answer

Configure the CloudFront cache Update the application to return cached content based upon the default request headers.

Answer

Override the cache method in me selected stage of API Gateway Select the POST method.

Answer

Save the latest request response in Lambda /tmp directory Update the Lambda function to check the /tmp directory

Answer

Save the latest request m AWS Systems Manager Parameter Store Modify the Lambda function to take the latest request response from Parameter Store

Amazon DVA-C02 Practice Test 2

Amazon DVA-C02 Practice Tests