ACorrect
Spot Instances - use spare capacity for a large discount but may be interrupted.
Correct. Spot uses spare capacity for up to about 90% off, but it may be interrupted when the capacity is needed.
Which combinations of an EC2 purchasing option and its characteristic are correct? (Choose TWO.)
1 / 1
Select all that apply
CorrectA, D
Explanation
Selecting the two correct combinations of an EC2 purchasing option and its characteristic.
- 1「purchasing option and its characteristic」Correctly map the characteristics of Spot / On-Demand / Reserved / Savings Plans / Dedicated Host
BIncorrect
On-Demand Instances - receive the largest discount in exchange for the possibility of being interrupted.
'A large discount in exchange for the possibility of interruption' is the characteristic of Spot Instances.
On-Demand Instances are standard pay-as-you-go that are not interrupted and require no commitment but receive no discount, so the characteristics are swapped and this is incorrect.
CIncorrect
Reserved Instances - assume interruption for up to 90% off, so they suit test environments.
Up to about 90% off on the assumption of interruption is Spot Instances.
Reserved Instances are for stable workloads that obtain a discount through a long-term commitment, so the description is wrong and this is incorrect.
DCorrect
Savings Plans - a 1-year or 3-year usage commitment for a discount over On-Demand.
Correct. Savings Plans can be used at a discounted price over On-Demand through a 1-year or 3-year usage commitment. They suit stable workloads.
EIncorrect
Dedicated Host - dedicates a physical server, so it cannot be used to bring your own license.
A Dedicated Host dedicates a physical server and can expose socket and core counts, so it is actually the BEST purchasing option for bringing your own license (BYOL).
The statement 'cannot be used to bring your own license' is the opposite of its characteristic, so it is incorrect.
Key Takeaway
Mapping: Spot = largest discount, interruptible / On-Demand = no commitment, pay-as-you-go / Reserved and Savings Plans = long-term commitment discount / Dedicated Host = physical dedication (licensing).