Multiple ChoiceDevelopment with AWS Services
Question 1. An ecommerce company is developing a serverless application to track user activities. The company needs to track each type of activity with a timestamp and a unique product ID. The company also must track actions that are associated with each activity, such as product views, shopping cart actions, purchases, and checkout processes. The company is planning a marketing campaign based on each user's activity. A developer needs to implement a partitioning strategy for an Amazon DynamoDB table to meet the data storage and access requirements for the application. The strategy must maximize provisioned throughput efficiency while minimizing the risk of throttling. Which solution will meet these requirements?
A. Create a composite primary key. Set the user ID as the partition key and the timestamp as the sort key.
B. Create a composite primary key. Set the product ID as the partition key and the associated actions as the sort key.
C. Use the product ID as the partition key. Create an Application Auto Scaling policy to update the table’s provisioned throughput when the table exceeds its capacity usage target.
D. Create an AWS Lambda function that adds a counter attribute that increases by one for each new record. Use the counter attribute as the partition key.
Multiple ChoiceDevelopment with AWS Services
Question 2. A company is migrating an on-premises database to Amazon RDS for MySQL. The company has read- heavy workloads. The company wants to refactor the code to achieve optimum read performance for queries. Which solution will meet this requirement with LEAST current and future effort?
A. Use a multi-AZ Amazon RDS deployment. Increase the number of connections that the code makes to the database or increase the connection pool size if a connection pool is in use.
B. Use a multi-AZ Amazon RDS deployment. Modify the code so that queries access the secondary RDS instance.
C. Deploy Amazon RDS with one or more read replicas. Modify the application code so that queries use the URL for the read replicas.
D. Use open source replication software to create a copy of the MySQL database on an Amazon EC2 instance. Modify the application code so that queries use the IP address of the EC2 instance.
Multiple ChoiceDevelopment with AWS Services
Question 3. A developer is building an application that uses Amazon DynamoDB. The developer wants to retrieve multiple specific items from the database with a single API call. Which DynamoDB API call will meet these requirements with the MINIMUM impact on the database?
A. BatchGetltem
B. Getltem
C. Scan
D. Query
Multiple ChoiceDevelopment with AWS Services
Question 4. A developer is creating an application that must transfer expired items from Amazon DynamoDB to Amazon S3. The developer sets up the DynamoDB table to automatically delete items after a specific TTL. The application must process the items in DynamoDB and then must store the expired items in Amazon S3. The entire process, including item processing and storage in Amazon S3, will take 5 minutes. Which solution will meet these requirements with the LEAST operational overhead?
A. Configure DynamoDB Accelerator (DAX) lo query for expired items based on the TTL Save the results to Amazon S3.
B. Configure DynamoDB Streams to invoke an AWS Lambda function. Program the Lambda function to process the items and to store the expired items in Amazon S3.
C. Deploy a custom application on an Amazon Elastic Container Service (Amazon ECS) cluster on Amazon EC2 instances. Program the custom application to process the items and to store the expired items in Amazon S3.
D. Create an Amazon EventBridge rule to invoke an AWS Lambda function. Program the Lambda function to process The items and to store the expired items in Amazon S3.
Multiple ChoiceTroubleshooting and Optimization
Question 5. 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 me applications. How should the developer identify and troubleshoot the root cause of the performance issues in production?
A. Add logging statements to the Lambda functions. then use Amazon CloudWatch to view the logs.
B. Use AWS CloudTrail and then examine the logs.
C. Use AWS X-Ray. then examine the segments and errors.
D. Run Amazon inspector agents and then analyze performance.