Lambda

Question 1

What is Lambda provisioned concurrency?

Answer 1

Provisioned concurrency initializes a requested number of execution environments so that they are prepared to respond immediately to your function’s invocations. Note that configuring provisioned concurrency incurs charges to your AWS account.

Question 2

What is Lambda reserved concurrency?

Answer 2

Reserved concurrency guarantees the maximum number of concurrent instances for the function. When a function has reserved concurrency, no other function can use that concurrency. There is no charge for configuring reserved concurrency for a function.

Question 3

Is it possible to scale Lambda provisioned concurrency?

Answer 3

Application Auto Scaling allows you to manage provisioned concurrency on a schedule or based on utilization.

Question 4

Is it possible to scale Lambda reserved concurrency on a schedule?

Answer 4

You cannot configure Application Auto Scaling to manage Lambda reserved concurrency on a schedule.

Question 5

How can you test the Lambda functions running on containers locally?

Answer 5

You can test the containers locally using the Lambda Runtime Interface Emulator.

Question 6

What is the maximum Lambda container image size?

Answer 6

Lambda supports a maximum uncompressed image size of 10 GB, including all layers.

Question 7

What one shoud do to troubleshoot any failures in Lambda functions?

Answer 7

One should insert logging statements in the Lambda function code

Question 8

In which use case you can create Dead Letter Queue (DLQ) for AWS Lambda functions: synchronous or asynchronous?

Answer 8

All asynchronous invocations, including those delivered via AWS events (S3, SNS, IoT, etc).

Question 9

What is the maximum total size of all environment variables for a Lambda function?

Answer 9

4 KB