amazon AWS Certified Developer - Associate practice test

A company is migrating legacy internal applications to AWS. Leadership wants to rewrite the internal
employee directory to use native AWS services. A developer needs to create a solution for storing
employee contact details and high-resolution photos for use with the new application.
Which solution will enable the search and retrieval of each employee's individual details and high-
resolution photos using AWS APIs?

• A. Encode each employee's contact information and photos using Base64. Store the information in an Amazon DynamoDB table using a sort key.
• B. Store each employee's contact information in an Amazon DynamoDB table along with the object keys for the photos stored in Amazon S3.
• C. Use Amazon Cognito user pools to implement the employee directory in a fully managed software-as-a-service (SaaS) method.
• D. Store employee contact information in an Amazon RDS DB instance with the photos stored in Amazon Elastic File System (Amazon EFS).

A developer is creating an application that will give users the ability to store photos from their
cellphones in the cloud. The application needs to support tens of thousands of users. The application
uses an Amazon API Gateway REST API that is integrated with AWS Lambda functions to process the
photos. The application stores details about the photos in Amazon DynamoDB.
Users need to create an account to access the application. In the application, users must be able to
upload photos and retrieve previously uploaded photos. The photos will range in size from 300 KB to
5 MB.
Which solution will meet these requirements with the LEAST operational overhead?

• A. Use Amazon Cognito user pools to manage user accounts. Create an Amazon Cognito user pool authorizer in API Gateway to control access to the API. Use the Lambda function to store the photos and details in the DynamoDB table. Retrieve previously uploaded photos directly from the DynamoDB table.
• B. Use Amazon Cognito user pools to manage user accounts. Create an Amazon Cognito user pool authorizer in API Gateway to control access to the API. Use the Lambda function to store the photos in Amazon S3. Store the object's S3 key as part of the photo details in the DynamoDB table. Retrieve previously uploaded photos by querying DynamoDB for the S3 key.
• C. Create an IAM user for each user of the application during the sign-up process. Use IAM authentication to access the API Gateway API. Use the Lambda function to store the photos in Amazon S3. Store the object's S3 key as part of the photo details in the DynamoDB table. Retrieve previously uploaded photos by querying DynamoDB for the S3 key.
• D. Create a users table in DynamoDB. Use the table to manage user accounts. Create a Lambda authorizer that validates user credentials against the users table. Integrate the Lambda authorizer with API Gateway to control access to the API. Use the Lambda function to store the photos in Amazon S3. Store the object's S3 key as par of the photo details in the DynamoDB table. Retrieve previously uploaded photos by querying DynamoDB for the S3 key.

A company receives food orders from multiple partners. The company has a microservices
application that uses Amazon API Gateway APIs with AWS Lambda integration. Each partner sends
orders by calling a customized API that is exposed through API Gateway. The API call invokes a shared
Lambda function to process the orders.
Partners need to be notified after the Lambda function processes the orders. Each partner must
receive updates for only the partner's own orders. The company wants to add new partners in the
future with the fewest code changes possible.
Which solution will meet these requirements in the MOST scalable way?

• A. Create a different Amazon Simple Notification Service (Amazon SNS) topic for each partner. Configure the Lambda function to publish messages for each partner to the partner's SNS topic.
• B. Create a different Lambda function for each partner. Configure the Lambda function to notify each partner's service endpoint directly.
• C. Create an Amazon Simple Notification Service (Amazon SNS) topic. Configure the Lambda function to publish messages with specific attributes to the SNS topic. Subscribe each partner to the SNS topic. Apply the appropriate filter policy to the topic subscriptions.
• D. Create one Amazon Simple Notification Service (Amazon SNS) topic. Subscribe all partners to the SNS topic.

A financial company must store original customer records for 10 years for legal reasons. A complete
record contains personally identifiable information (PII). According to local regulations, PII is
available to only certain people in the company and must not be shared with third parties. The
company needs to make the records available to third-party organizations for statistical analysis
without sharing the PII.
A developer wants to store the original immutable record in Amazon S3. Depending on who accesses
the S3 document, the document should be returned as is or with all the PII removed. The developer
has written an AWS Lambda function to remove the PII from the document. The function is named
removePii.
What should the developer do so that the company can meet the PII requirements while maintaining
only one copy of the document?

• A. Set up an S3 event notification that invokes the removePii function when an S3 GET request is made. Call Amazon S3 by using a GET request to access the object without PII.
• B. Set up an S3 event notification that invokes the removePii function when an S3 PUT request is made. Call Amazon S3 by using a PUT request to access the object without PII.
• C. Create an S3 Object Lambda access point from the S3 console. Select the removePii function. Use S3 Access Points to access the object without PII.
• D. Create an S3 access point from the S3 console. Use the access point name to call the GetObjectLegalHold S3 API function. Pass in the removePii function name to access the object without PII.

A developer is deploying an AWS Lambda function The developer wants the ability to return to older
versions of the function quickly and seamlessly.
How can the developer achieve this goal with the LEAST operational overhead?

• A. Use AWS OpsWorks to perform blue/green deployments.
• B. Use a function alias with different versions.
• C. Maintain deployment packages for older versions in Amazon S3.
• D. Use AWS CodePipeline for deployments and rollbacks.

A developer has written an AWS Lambda function. The function is CPU-bound. The developer wants
to ensure that the function returns responses quickly.
How can the developer improve the function's performance?

• A. Increase the function's CPU core count.
• B. Increase the function's memory.
• C. Increase the function's reserved concurrency.
• D. Increase the function's timeout.

For a deployment using AWS Code Deploy, what is the run order of the hooks for in-place
deployments?

• A. BeforeInstall -> ApplicationStop -> ApplicationStart -> AfterInstall
• B. ApplicationStop -> BeforeInstall -> AfterInstall -> ApplicationStart
• C. BeforeInstall -> ApplicationStop -> ValidateService -> ApplicationStart
• D. ApplicationStop -> BeforeInstall -> ValidateService -> ApplicationStart

A company is building a serverless application on AWS. The application uses an AWS Lambda
function to process customer orders 24 hours a day, 7 days a week. The Lambda function calls an
external vendor's HTTP API to process payments.
During load tests, a developer discovers that the external vendor payment processing API
occasionally times out and returns errors. The company expects that some payment processing API
calls will return errors.
The company wants the support team to receive notifications in near real time only when the
payment processing external API error rate exceed 5% of the total number of transactions in an hour.
Developers need to use an existing Amazon Simple Notification Service (Amazon SNS) topic that is
configured to notify the support team.
Which solution will meet these requirements?

• A. Write the results of payment processing API calls to Amazon CloudWatch. Use Amazon CloudWatch Logs Insights to query the CloudWatch logs. Schedule the Lambda function to check the CloudWatch logs and notify the existing SNS topic.
• B. Publish custom metrics to CloudWatch that record the failures of the external payment processing API calls. Configure a CloudWatch alarm to notify the existing SNS topic when error rate exceeds the specified rate.
• C. Publish the results of the external payment processing API calls to a new Amazon SNS topic. Subscribe the support team members to the new SNS topic.
• D. Write the results of the external payment processing API calls to Amazon S3. Schedule an Amazon Athena query to run at regular intervals. Configure Athena to send notifications to the existing SNS topic when the error rate exceeds the specified rate.

A company is offering APIs as a service over the internet to provide unauthenticated read access to
statistical information that is updated daily. The company uses Amazon API Gateway and AWS
Lambda to develop the APIs. The service has become popular, and the company wants to enhance
the responsiveness of the APIs.
Which action can help the company achieve this goal?

• A. Enable API caching in API Gateway.
• B. Configure API Gateway to use an interface VPC endpoint.
• C. Enable cross-origin resource sharing (CORS) for the APIs.
• D. Configure usage plans and API keys in API Gateway.

A developer wants to store information about movies. Each movie has a title, release year, and
genre. The movie information also can include additional properties about the cast and production
crew. This additional information is inconsistent across movies. For example, one movie might have
an assistant director, and another movie might have an animal trainer.
The developer needs to implement a solution to support the following use cases:
For a given title and release year, get all details about the movie that has that title and release year.
For a given title, get all details about all movies that have that title.
For a given genre, get all details about all movies in that genre.
Which data store configuration will meet these requirements?

• A. Create an Amazon DynamoDB table. Configure the table with a primary key that consists of the title as the partition key and the release year as the sort key. Create a global secondary index that uses the genre as the partition key and the title as the sort key.
• B. Create an Amazon DynamoDB table. Configure the table with a primary key that consists of the genre as the partition key and the release year as the sort key. Create a global secondary index that uses the title as the partition key.
• C. On an Amazon RDS DB instance, create a table that contains columns for title, release year, and genre. Configure the title as the primary key.
• D. On an Amazon RDS DB instance, create a table where the primary key is the title and all other data is encoded into JSON format as one additional column.