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Question 71

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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?

Manually instrument the X-Ray SDK in the application code.
Manually instrument the X-Ray SDK in the application code.
Use the X-Ray auto-instrumentation agent.
Use the X-Ray auto-instrumentation agent.
Use Amazon Macie to detect and hide PII. Call the X-Ray API from AWS Lambda.
Use Amazon Macie to detect and hide PII. Call the X-Ray API from AWS Lambda.
Use AWS Distro for Open Telemetry.
Use AWS Distro for Open Telemetry.
Suggested answer: A
Explanation:

This solution will meet the requirements by allowing the developer to control what data is sent to XRay and CloudWatch from the application code. The developer can filter out any PII from the trace messages before sending them to X-Ray and CloudWatch, ensuring that no PII goes outside of the EC2 instances. Option B is not optimal because it will automatically instrument all incoming and outgoing requests from the application, which may include PII in the trace messages. Option C is not optimal because it will require additional services and costs to use Amazon Macie and AWS Lambda, which may not be able to detect and hide all PII from the trace messages. Option D is not optimal because it will use Open Telemetry instead of X-Ray, which may not be compatible with CloudWatch and other AWS services.

Reference: [AWS X-Ray SDKs]

asked 16/09/2024
long tran
39 questions

Question 72

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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?

Configure the DB cluster's public access setting to Yes.
Configure the DB cluster's public access setting to Yes.
Configure an Amazon RDS database proxy for the Lambda functions.
Configure an Amazon RDS database proxy for the Lambda functions.
Configure a NAT gateway and a security group for the Lambda functions.
Configure a NAT gateway and a security group for the Lambda functions.
Configure the VPC, subnets, and a security group for the Lambda functions.
Configure the VPC, subnets, and a security group for the Lambda functions.
Suggested answer: D
Explanation:

This solution will meet the requirements by allowing the Lambda functions to access the DB cluster securely within the same VPC without crossing the public internet. The developer can configure a VPC endpoint for RDS in a private subnet and assign it to the Lambda functions. The developer can also configure a security group for the Lambda functions that allows inbound traffic from the DB cluster on port 3306 (MySQL). Option A is not optimal because it will expose the DB cluster to public access, which may compromise its security and data integrity. Option B is not optimal because it will introduce additional latency and complexity to use an RDS database proxy for accessing the DB cluster from Lambda functions within the same VPC. Option C is not optimal because it will require additional costs and configuration to use a NAT gateway for accessing resources in private subnets from Lambda functions.

Reference: [Configuring a Lambda Function to Access Resources in a VPC]

asked 16/09/2024
Darpan Sodhi
43 questions

Question 73

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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?

Create a Lambda environment variable to store the table name. Use the standard method for the programming language to retrieve the variable.
Create a Lambda environment variable to store the table name. Use the standard method for the programming language to retrieve the variable.
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.
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.
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.
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.
Create a global variable that is outside the handler in the Lambda function to store the table name.
Create a global variable that is outside the handler in the Lambda function to store the table name.
Suggested answer: A
Explanation:

The solution that will meet the requirements most efficiently is to create a Lambda environment variable to store the table name. Use the standard method for the programming language to retrieve the variable. This way, the developer can avoid hard-coding the table name in the Lambda function code and easily change the table name by updating the environment variable. The other options either involve storing the table name in a file, which is less efficient and secure than using an environment variable, or creating a global variable, which is not recommended as it can cause concurrency issues.

Reference: Using AWS Lambda environment variables

asked 16/09/2024
GIORGOS KELAIDIS
36 questions

Question 74

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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?

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Question 75

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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?

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Question 76

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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'?

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Question 77

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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)

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Question 78

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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'?

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Question 79

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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?

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Question 80

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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'?

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