What are the payment options available for Reserved Instances?
All Upfront (AURI), Partial Upfront (PURI) and No Upfront (NURI).
Which EC2 pricing model is best suited for unpredictable workloads, and why?
On-Demand Instances are ideal for unpredictable workloads as you pay only for what you use.
Can you cancel or modify a Reserved Instance once it’s purchased, and how does this affect pricing decisions?
No, Reserved Instances cannot be canceled or modify once purchased. You have to pay for the full term (1 or 3 years), regardless of whether you use the instance or not.
Briefly explain On Demand Instance.
On deman for short time. This is useful in unprectiable situations. It is useful in testing and applications. It can be terminated after our job is done.for 1 year project on demand is not helpful. also, it is very expensive compare to long term instances. On demand charging is per second or per hour.
Briefly explain Long Term Instance.
It is for long term 1 year or 3 years. It is for predictable work loads. It has 2 types: Standard and convertible
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