A company recently deployed its web application on AWS. The company is preparing for a large-scale sales event and must ensure that the web…

The correct answer is B and E. Configuring a higher provisioned concurrency for the Lambda

functions will ensure that the functions are ready to respond to the initial burst of requests without

any cold start latency. Using Amazon RDS Proxy to create a proxy for the Aurora database will enable

the Lambda functions to reuse existing database connections and reduce the overhead of

establishing new ones. This will also improve the scalability and availability of the database by

managing the connection pool size and handling failovers. Option A is incorrect because reserved

concurrency only limits the number of concurrent executions for a function, not pre-warms them.

Option C is incorrect because converting the DB cluster to an Aurora global database will not address

the issue of database connection latency, and may introduce additional costs and complexity. Option

D is incorrect because moving the code blocks that initialize database connections into the function

handlers will not improve the performance or scalability of the Lambda functions, and may actually

worsen the cold start latency. Reference:

AWS Lambda Provisioned Concurrency

Using Amazon RDS Proxy with AWS Lambda

Certified DevOps Engineer - Professional (DOP-C02) Study Guide (page 173)