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NEW QUESTION 23
An organization is storing large files in Amazon S3, and is writing a web application to display meta-data about the files to end-users. Based on the metadata a user selects an object to download. The organization needs a mechanism to index the files and provide single-digit millisecond latency retrieval for the metadata.
What AWS service should be used to accomplish this?
- A. Amazon EC2
- B. Amazon RDS
- C. Amazon DynamoDB
- D. AWS Lambda
Answer: A
Explanation:
Explanation
Amazon DynamoDB is a fast and flexible NoSQL database service for all applications that need consistent, single-digit millisecond latency at any scale. It is a fully managed database and supports both document and key-value data models. Its flexible data model and reliable performance make it a great fit for mobile, web, gaming, ad-tech, Internet of Things (IoT), and many other applications.
References:
NEW QUESTION 24
A Developer is designing a fault-tolerant environment where client sessions will be saved.
How can the Developer ensure that no sessions are lost if an Amazon EC2 instance fails?
- A. Use Elastic Load Balancer connection draining to stop sending requests to failing instances.
- B. Use sticky sessions with an Elastic Load Balancer target group.
- C. Use Amazon SQS to save session data.
- D. Use Amazon DynamoDB to perform scalable session hadling.
Answer: D
Explanation:
The key word is fault-tolerant. With sticky sessions the state is maintained on the EC2 instance if that fails state is lost. With DynamoDB the state is independent of EC2 therefore fault-tolerant.
NEW QUESTION 25
A company has an AWS CloudFormation template written in JSON that is used to launch new Amazon RDS for MySQL DB instances. The security team has asked a database specialist to ensure that the master password is automatically rotated every 30 days for all new DB instances that are launched using the template.
What is the MOST operationally efficient solution to meet these requirements?
- A. Create an AWS Lambda function to rotate the secret. Modify the CloudFormation template to add an AWS::SecretsManager::RotationSchedule resource. Configure the RotationLambdaARN value and, for the RotationRules property, set the AutomaticallyAfterDays parameter to 30.
- B. Save the password in an Amazon S3 object. Encrypt the S3 object with an AWS KMS key. Set the KMS key to be rotated every 30 days by setting the EnableKeyRotation property to true. Use a CloudFormation custom resource to read the S3 object to extract the password.
- C. Modify the CloudFormation template to use the AWS KMS key as the database password. Configure an Amazon EventBridge rule to invoke the KMS API to rotate the key every 30 days by setting the ScheduleExpression parameter to ***/30***.
- D. Integrate the Amazon RDS for MySQL DB instances with AWS IAM and centrally manage the master database user password.
Answer: C
NEW QUESTION 26
What is required to trace Lambda-based applications with AWS X-Ray?
- A. Send logs from the Lambda application to an S3 bucket; trigger a Lambda function from the bucket to send data to AWS X-Ray.
- B. Use an IAM execution role to give the Lambda function permissions and enable tracing.
- C. Update and add AWS X-Ray daemon code to relevant parts of the Lambda function to set up the trace.
- D. Trigger a Lambda function from the application logs in Amazon CloudWatch to submit tracing data to AWS X-Ray.
Answer: D
Explanation:
https://docs.aws.amazon.com/lambda/latest/dg/services-xray.html
NEW QUESTION 27
A developer is setting up Amazon API Gateway for their company’s products The API will be used by registered developers to query and update their environments. The company wants to limit the amount of requests end users can send for both cost and security reasons Management wants to offer registered developers the option of buying larger packages that allow for more requests.
How can the developer accomplish this with the LEAST amount of overhead management?
- A. Enable throttling for the API Gateway stage. Set a value for both the rate and burst capacity If a registered user chooses a larger package, create a stage for them, adjust the values, and share the new URL with them.
- B. Set up a default usage plan, specify values for the rate and burst capacity, and associate it with a stage, if a registered user chooses a larger package, create a custom plan with the appropriate values and associate the plan with the user
- C. Enable Amazon CloudWatch metrics for the API Gateway stage Set up CloudWatch alarms based off the Count metric and the ApiName, Method, Resource, and Stage dimensions to alerts when request rates pass the threshold Set the alarm action to Deny If a registered user chooses a larger package create a user-specific alarm and adjust the values
- D. Set up Amazon CloudWatch API logging in API Gateway Create a filter based on the user and requestTime fields and create an alarm on this filter Write an AWS Lambda function to analyze the values and requester information, and respond accordingly Set up the function as the target for the alarm If a registered user chooses a larger package, update the Lambda code with the values.
Answer: A
NEW QUESTION 28
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