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AWS Certified Developer - Associate

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Q_01 domain/d1 · medium single discuss →

A developer notices that a Lambda function which opens a new database connection on every invocation has high latency. The function makes repeated calls to the same downstream database. Which change to the function code best improves performance by taking advantage of execution environment reuse?

A Initialize the database connection inside the function handler so it is created on each invocation
B Initialize SDK clients and database connections outside the function handler so subsequent invocations can reuse them
C Store the connection details in the /tmp directory as user data between invocations
D Increase the function's reserved concurrency to force reuse of connections

Q_02 domain/d1 · medium single discuss →

A team has deployed a Lambda function that accidentally invokes itself, causing an unexpected spike in invocations and cost. According to AWS best practices, what should the team do immediately to stop the runaway invocations while they fix the code?

A Delete the function's CloudWatch log group
B Set the function's reserved concurrency to 0 to throttle all invocations
C Increase the function's timeout to allow invocations to complete
D Enable provisioned concurrency to absorb the extra load

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