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.

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Definitions:

Alternation of Generations

A type of life cycle characteristic of plants and a few algae and fungi in which they spend part of their life in a multicellular n gametophyte stage and part in a multicellular 2n sporophyte stage.

Gametophyte

The reproductive stage in the life cycle of plants and algae where gametes, the cells responsible for reproduction, are created.

Sporophyte

The diploid multicellular stage in the life cycle of plants and algae that produces spores through meiotic division.

Diploid

Refers to cells that contain two complete sets of chromosomes, one from each parent.