Recall & Review
beginner
What is the On-Demand pricing model in EC2?
On-Demand pricing lets you pay for compute capacity by the hour or second with no long-term commitments. You can start and stop instances anytime and pay only for what you use.
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beginner
Describe the Reserved Instances pricing model in EC2.
Reserved Instances let you reserve capacity for 1 or 3 years with a significant discount compared to On-Demand. You pay upfront or partially upfront and get a lower hourly rate.Click to reveal answer
beginner
What is the Spot Instances pricing model in EC2?
Spot Instances let you use spare EC2 capacity at steep discounts. However, AWS can reclaim these instances with a 2-minute warning if it needs the capacity back.Click to reveal answer
beginner
Which EC2 pricing model is best for flexible, short-term workloads?
On-Demand pricing is best for flexible, short-term workloads because you pay only for what you use without commitments.
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intermediate
What is a key risk when using Spot Instances?
The key risk is that Spot Instances can be interrupted by AWS when the capacity is needed elsewhere, so they are not suitable for critical or long-running tasks without checkpointing.
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Which EC2 pricing model requires a long-term commitment for a discount?
✗ Incorrect
Reserved Instances require a 1 or 3 year commitment to get discounted pricing.
What happens to Spot Instances when AWS needs the capacity back?
✗ Incorrect
Spot Instances get a 2-minute warning before AWS reclaims the capacity.
Which pricing model is best if you want to pay only for what you use with no upfront cost?
✗ Incorrect
On-Demand Instances let you pay only for what you use with no upfront cost.
Which EC2 pricing model offers the steepest discount but with interruption risk?
✗ Incorrect
Spot Instances offer the biggest discounts but can be interrupted by AWS.
If you have a steady, predictable workload, which EC2 pricing model is most cost-effective?
✗ Incorrect
Reserved Instances are best for steady workloads because they offer lower prices with a commitment.
Explain the differences between On-Demand, Reserved, and Spot EC2 pricing models.
Think about cost, commitment, and interruption risk.
You got /3 concepts.
When would you choose Spot Instances over On-Demand or Reserved Instances?
Consider workload tolerance for interruptions and budget.
You got /3 concepts.