You purchased a 3-year Standard Reserved Instance for an m5.large instance in us-east-1. If you launch an m5.xlarge instance in the same region, what happens to the Reserved Instance discount?

medium📝 Conceptual Q4 of 15

AWS - Cost Optimization

APartial discount applies due to instance size flexibility

BNo discount applies because instance size does not match

CFull discount applies because instance family matches

DDiscount applies only if the instance is in a different region

Step-by-Step Solution

Solution:

Step 1: Understand Standard Reserved Instance size flexibility
Standard Reserved Instances apply discount only to the exact instance size purchased.
Step 2: Analyze instance size difference
m5.xlarge is a different size than m5.large, so no discount applies.
Final Answer:
No discount applies because instance size does not match -> Option B
Quick Check:
Size mismatch means no discount = B [OK]

Quick Trick: Standard RIs require exact instance size match for discount [OK]

Common Mistakes:

Assuming family match grants discount regardless of size
Confusing Standard with Convertible Reserved Instances
Ignoring region constraints

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You purchased a 3-year Standard Reserved Instance for an m5.large instance in us-east-1. If you launch an m5.xlarge instance in the same region, what happens to the Reserved Instance discount?

Step 1: Understand Standard Reserved Instance size flexibility

Step 2: Analyze instance size difference

Final Answer:

Quick Check:

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