Exam AWS-SysOps topic 1 question 535 discussion

I'm gonna say B & C If it's already bursting and credits are used, is it not assumed that it is already on a T series instance? BC

The question here is how it will improve performance? I will go with A & C

CD Increase the size of the current instance type Configure a CloudWatch alarm on the CPU credits metric

C. Increase the size of the current instance type: By increasing the size of the current instance type, you provide more CPU resources to handle the increased workload. This will help alleviate the CPU credit exhaustion and improve the overall performance of the web application. D. Configure a CloudWatch alarm on the CPU credits metric: By configuring a CloudWatch alarm on the CPU credits metric, you can set up automated notifications or actions when the CPU credits drop to a certain threshold. This will help you proactively monitor and manage the CPU credits usage, allowing you to take necessary steps to prevent depletion and ensure optimal performance of the web application.

The point is to scale your EC2 up so that you don't run out of CPU capacity and end up utilizing burst CPU above the baseline level. The only thing to do is scale up. Buying additional credits is dealing with symptoms, not treating the cause. A and C are correct.

AC seems good option T2 instances are Burstable Performance Instances that provide a baseline level of CPU performance with the ability to burst above the baseline. B is not needed as T2 will burst above

B & C seams more relevant to improve performance...Option D is to notify only...

> CPU credits has dropped to zero several times. This already implies that it's a T series instance type. That eliminates A) B) Buying more credits will improve performance. C) Increasing size of instance type will increase performance: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/burstable-credits-baseline-concepts.html D) Being notified by alarms will not improve performance. The answer is B+C

I think ans A should say "T2 unlimited", in that case the correct answer would be AC. About ans B "purchase more CPU credits" means to convert the instance to unlimited mode .. therefore ans BC is also an option .. so the question is a bit confusing

I shall also go with AC

Need burstable CPU, now if you already using T2 instance you can also buy CPU credit "If the instance needs to run at higher CPU utilization for a prolonged period, it can also do so at a flat additional charge of 5 cents per vCPU-hour." But going with AC

ans - ac

CPU credits has dropped several times means this might be already T2 no? B and C should be right.

how can CW improve performance? D is NOT right answer

Also CD

Answer is C and D because, there has been a steady growth and CPU credit is 0, so the only option left is to increase the instance size.

I go for AD. *T2 instance receives CPU Credits continuously, the rate of which depends on the instance size. T2 instances accrue CPU Credits when they are idle, and use CPU credits when they are active. * They want to find out how to improve. So D is relevant.