The AWS CSA tests are pretty good.. Some of the questions did came exactly in final Exam. I learnt time management from these exams. Overall good technical stuff. I will highly recommend them to use this for AWS CSA exams.
Were there any questions on AWS Lambda during exam ?
I didn't see questions related to AWS Lambda in Whizlabs.
there were 2 to 3 questions on Lambda like which aws service can invoke Lambda functions like S3,DynamoDB were answers.I don't remember other 2.In whizlabs also there are very less questions in Lambda.