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NEW QUESTION 45
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?
- A. Configure Amazon Simple Workflow Service to process any direct unprocessed events
- B. Configure AWS CloudTrail logging to investigate the invocation failures
- C. Configure AWS Config to process any direct unprocessed events
- D. Configure Dead Letter Queues by sending events to Amazon SQS for investigation.
Answer: B
NEW QUESTION 46
A developer has built an application using Amazon Cognito for authentication and authorization.
After a user is successfully logged in to the application, the application creates a user record in an Amazon DynamoDB table.
What is the correct flow to authenticate the user and create a record in the DynamoDB table?
- A. Authenticate and get a token from an Amazon Cognito user pool.
Exchange the token for AWS credentials with an Amazon Cognito identity pool.
Use the credentials to access DynamoDB. - B. Authenticate and get a token from an Amazon Cognito identity pool.
Exchange the token for AWS credentials with an Amazon Cognito user pool.
Use the credentials to access DynamoDB. - C. Authenticate and get a token from an Amazon Cognito identity pool.
Use the token to access DynamoDB. - D. Authenticate and get a token from an Amazon Cognito user pool.
Use the token to access DynamoDB.
Answer: B
NEW QUESTION 47
The Developer for a retail company must integrate a fraud detection solution into the order processing solution. The fraud detection solution takes between ten and thirty minutes to verify an order. At peak, the web site can receive one hundred orders per minute.
What is the most scalable method to add the fraud detection solution to the order processing pipeline?
- A. Add all new orders to an SQS queue. Configure an Auto Scaling group that uses the queue depth metric as its unit of scale to launch a dynamically-sized fleet of EC2 instances spanning multiple AZs with the fraud detection solution installed on them to pull orders from this queue. Update the order with a pass or fails status.
- B. Write all new orders to Amazon DynamoDB. Configure DynamoDB Streams to include all new orders.
Subscribe a Lambda function to automatically read batches of records from the Kinesis Stream. The Lambda function includes the fraud detection software and will update the order with a pass or fail status. - C. Add all new orders to an Amazon SQS queue. Configure a fleet of 10 EC2 instances spanning multiple AZs with the fraud detection solution installed on them to pull orders from this queue. Update the order with a pass or fails status.
- D. Add all new orders to an Amazon Kinesis Stream. Subscribe a Lambda function to automatically read batches of records from the Kinesis Stream. The Lambda function includes the fraud detection software and will update the order with a pass or fail status.
Answer: A
NEW QUESTION 48
A Developer is creating an AWS Lambda function to process a stream of data from an Amazon Kinesis Data Stream. When the Lambda function parses the data and encounters a missing field, it exits the function with an error. The function is generating duplicate records from the Kinesis stream. When the Developer looks at the stream output without the Lambda function, there are no duplicate records.
What is the reason for the duplicates?
- A. The Lambda function did not handle the error, and the Lambda service attempted to reprocess the data.
- B. The Lambda function did not advance the Kinesis stream pointer to the next record after the error.
- C. The Lambda function is not keeping up with the amount of data coming from the stream.
- D. The Lambda event source used asynchronous invocation, resulting in duplicate records.
Answer: B
NEW QUESTION 49
An application that runs on an Amazon EC2 instance needs to access and make API calls to multiple AWS services.
What is the MOST secure way to provide access to the AWS services with MINIMAL management overhead?
- A. Use EC2 instance profiles.
- B. Store and retrieve credentials from AWS CodeCommit.
- C. Use AWS KMS to store and retrieve credentials.
- D. Use AWS root user to make requests to the application.
Answer: A
Explanation:
Explanation
https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_use_switch-role-ec2.html
NEW QUESTION 50
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