Questions 40 to 42
Explanations for questions 40 to 42
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Question 40
A development team needs to run up a few lab servers on the weekend for a new project. The servers will need to run uninterrupted for a few hours. Which EC2 pricing option would be the most suitable?
- Spot
- Reserved
- On-demand
- Dedicated instances
Correct Answer: 3
Explanation: On-demand pricing ensures that instances will not be terminated and is the most economical option. Use on-demand for ad-hoc requirements where you cannot tolerate interruption.
INCORRECT: “Spot” is incorrect. Spot pricing may be the most economical option for a short duration over a weekend, but you may have the instances terminated by AWS, and there is a requirement that the servers run uninterrupted.
INCORRECT: “Reserved” is incorrect. Reserved pricing provides a reduced cost for a contracted period (1 or 3 years), and is not suitable for ad hoc requirements.
CORRECT: “On-demand” is the correct answer.
INCORRECT: “Dedicated instances” is incorrect. Dedicated instances run on hardware that’s dedicated to a single customer. Additionally, they are more expensive than regular on-demand instances.
References: https://aws.amazon.com/ec2/pricing/
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