An AWS Lambda Function Accesses Two Amazon DynamoDB Tables

question 412

Multiple Choice

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) Add DynamoDB as an event source to the Lambda function. View the performance with Amazon CloudWatch metrics.
• B) Place an Application Load Balancer (ALB) in front of the two DynamoDB tables. Inspect the ALB logs.
• C) Limit Lambda to no more than five concurrent invocations. Monitor from the Lambda console.
• D) Enable AWS X-Ray tracing for the function. View the traces from the X-Ray service.