Exam AWS Certified Solutions Architect - Professional SAP-C02 topic 1 question 119 discussion

The correct answer is B. Creating an Amazon EventBridge rule that runs every business day in the evening to stop instances and another rule that runs every business day in the morning to start instances based on the tag will reduce costs with the least operational effort. This approach allows for instances to be stopped during non-business hours when they are not in use, reducing the costs associated with running them. It also allows for instances to be started again in the morning when the development and testing teams need to use them. Option A would require the instances to be stopped and started once a day, which could result in instances being stopped while they are in use or not being stopped when they are not in use. Option C would terminate instances during non-business hours and restore them again in the morning, which could lead to data loss or longer start up times. Option D would terminate or restore instances every hour, which could lead to unnecessary costs as well as data loss or longer start up times.

this is easy. I wish I'll have several of this in the exam.

Stopping instances rather than terminating them ensures that the environment's state can be quickly restored the next day without needing to manage backups or restorations, making it operationally efficient.

B. Create an Amazon EventBridge rule that runs every business day in the evening. Configure the rule to invoke an AWS Lambda function that stops instances based on the tag. Create a second EventBridge rule that runs every business day in the morning. Configure the second rule lo invoke another Lambda function that starts instances based on the tag.

Voted B, but C seems to be more cost effective. Any idea to why it wouldn't work?

Option B

B for sure

A cannot complete the requirement since it runs once a day and we need to stop the non-prod instances in the eveninig and start them in the morning. A would potentially work if we set up the rule to run every hour and then determine the appropriate action based on the time of the day. C and D are nonsense to me

Can anyone explain why B has less operational effort than A？

B is correct The keyword here is whether you terminate or stop the instance. ofc you don't want to terminate. stop is enough and company don't pay when the instance is in stop state.

B is the easy choice

B is correct. Stop the instance that preserver all data. C: is incorrect because it terminate instance that will loss data