Discuss Amazon CLF-C02 Exam Topic 4 Question 58

A company is running a reporting web server application on Amazon EC2 instances. The application runs once every week and once again at the end of the month. The EC2 instances can be shut down when they are not in use.

What is the MOST cost-effective billing model for this use case?

AStandard Reserved Instances

BConvertible Reserved Instances

COn-Demand Capacity Reservations

DOn-Demand Instances

Suggested Answer: D

For a reporting application that runs only periodically, On-Demand Instances are the most cost-effective choice because they allow the company to pay only for the compute capacity used, without long-term commitments. Reserved Instances are less flexible due to the need for upfront payment or long-term contracts, which would not be cost-effective given the application's intermittent usage. On-Demand Capacity Reservations would also be more costly, as they hold capacity regardless of usage.

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25 comments · newest first

Mark Young 1 day ago

I lean towards C because the tricky part is on-demand vs on-demand capacity reservations they hold capacity regardless of usage.

Mila 33 minutes ago

True, but they lock you in. Flexibility is key here.

Francoise 5 days ago

But what about A? Reserved Instances could save money long-term.

Ricarda 10 days ago

Agreed! On-Demand Instances fit perfectly for weekly use.

Lottie 16 days ago

I think D is the best choice. Pay only when needed.

Shantell 21 days ago

True, but D is straightforward. No extra costs when idle.

Jeannine 26 days ago

I feel like B could work too. Convertible for future needs.

Nakisha 1 month ago

A is risky if usage changes. D is flexible.

Eva 1 month ago

But what about A? Reserved Instances could save more long-term.

Mammie 1 month ago

Agreed, D makes sense. Pay only when needed.

Linwood 2 months ago

I think D is the best choice. Only running weekly, so why commit?

Alyssa 2 months ago

Standard Reserved Instances could be a good option if they plan to use it long-term.

Tresa 2 months ago

Wait, can you really shut down EC2 and not get charged?

Gerry 2 months ago

I think On-Demand is the way to go for weekly usage.

Coletta 2 months ago

I disagree, Reserved Instances might save more in the long run.

Carolann 2 months ago

Definitely On-Demand Instances, they only pay for what they use.

Ilda 3 months ago

On-Demand seems right since they only run weekly.

Mitzie 3 months ago

No way, Reserved Instances are way too expensive for this.

Lavonna 3 months ago

Surprised that On-Demand is the best choice here!

Stephaine 3 months ago

I think Reserved Instances could save more in the long run.

Malcom 3 months ago

Definitely On-Demand Instances for this!

Marisha 3 months ago

I’m a bit confused about the differences between the Reserved Instances options. Wouldn't Standard Reserved Instances lock us into a longer commitment?

Sylvie 4 months ago

This question reminds me of a practice one where we discussed the cost benefits of shutting down instances. I think On-Demand is still the way to go.

Isidra 4 months ago

I remember studying Reserved Instances, but I feel like they might not be cost-effective for such infrequent use.

Berry 5 months ago

I think the On-Demand Instances might be the best option since the application only runs weekly and monthly, but I'm not completely sure.

Amazon CLF-C02 Exam - Topic 4 Question 58 Discussion