Which Amazon EC2 instance pricing model can provide discounts of up to 90%?
Reserved Instances
On-Demand
Dedicated Hosts
Spot Instances
Explanations:
Reserved Instances provide discounts of up to 75% for long-term commitments but not up to 90%.
On-Demand instances are charged at a fixed rate with no discount based on time of use.
Dedicated Hosts provide physical servers but are not designed for cost savings.
Spot Instances offer discounts of up to 90% for unused EC2 capacity, making them highly cost-effective.