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NEW QUESTION 40
A Developer must analyze performance issues with production-distributed applications written as AWS Lambda functions. These distributed Lambda applications invoke other components that make up the applications.
How should the Developer identify and troubleshoot the root cause of the performance issues in production?
- A. Use AWS Cloud Trail and then examine the logs
- B. Add logging statements to the Lambda functions, then use Amazon CloudWatch to view the logs.
- C. Run Amazon Inspector agents and then analyze performance
- D. Use AWS X-Ray, then examine the segments and errors
NEW QUESTION 41
A company is building an application to track athlete performance using an Amazon DynamoDB table. Each item in the table is identified by a partition key (user_id) and a sort key (sport_name). The table design is shown below:
(Note: Not all table attributes are shown)
A Developer is asked to write a leaderboard application to display the top performers (user_id) based on the score for each sport_name.
What process will allow the Developer to extract results MOST efficiently from the DynamoDB table?
- A. Use a DynamoDB scan operation to retrieve scores and user_id based on sport_name, and order the results based on the score attribute.
- B. Use a DynamoDB query operation with the key attributes of user_id and sport_name and order the results based on the score attribute.
- C. Create a local secondary index with a primary key of sport_name and a sort key of score and get the results based on the score attribute.
- D. Create a global secondary index with a partition key of sport_name and a sort key of score, and get the results
NEW QUESTION 42
A developer is using AWS CodeDeploy to automate a company's application deployments to Amazon EC2.
Which application specification file properties are required to ensure the software deployments do not fail?
- A. The file must be stored in AWS CodeBuikJ and referenced from the application's source code.
- B. The file must be a JSON-formatted file named appspec.json.
- C. The file must be stored in Amazon S3 and referenced from the application's source code.
- D. The file must be placed in the root of the directory structure of the application's source code.
- E. The file must be a YAML-formatted file named appspec.yml
NEW QUESTION 43
An AWS Lambda function accesses two Amazon DynamoDB tables. A developer wants to improve the performance of the Lambda function by identifying bottlenecks in the function. How can the developer inspect the timing of the DynamoDB API calls?
- A. Limit Lambda to no more than five concurrent invocations Monitor from the Lambda console
- B. Place an Application Load Balancer (ALB) in front of the two DynamoDB tables. Inspect the ALB logs
- C. Add DynamoDB as an event source to the Lambda function. View the performance with Amazon CloudWatch metrics
- D. Enable AWS X-Ray tracing for the function. View the traces from the X-Ray service.
NEW QUESTION 44
A developer is building a web and mobile application for two types of users regular users and guest users Regular users are required to log in, but guest users do not log in Users should see only their data regardless of whether they authenticate Users need AWS credentials before they can access AWS resources What is the MOST secure solution that the developer can implement to allow access for guest users?
- A. Use an Amazon Cognito credentials provider to issue temporary credentials that are linked to an unauthenticated role that has access to the required resources.
- B. Set up an IAM user that has permissions to the required resources. Hardcode the 1AM credentials in the web and mobile application
- C. Generate temporary keys that are stored in AWS Key Management Service (AWS KMS) Use the temporary keys to access the required resources
- D. Generate temporary credentials. Store the temporary credentials in AWS Secrets Manager Use the temporary credentials to access the required resources
NEW QUESTION 45