Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 29 discussion

Ans: D

Scheduled Reserved Instances (Scheduled Instances) enable you to purchase capacity reservations that recur on a daily, weekly, or monthly basis, with a specified start time and duration, for a one-year term. You reserve the capacity in advance, so that you know it is available when you need it. You pay for the time that the instances are scheduled, even if you do not use them. Scheduled Instances are a good choice for workloads that do not run continuously, but do run on a regular schedule. For example, you can use Scheduled Instances for an application that runs during business hours or for batch processing that runs at the end of the week. CORRECT: "Scheduled Reserved Instances" is the correct answer.

Predictable 7-Day Workload The reporting process runs for a fixed duration (7 days) every month. Spot Blocks allow you to reserve Spot capacity for 1–6 hours or 1–6 weeks without interruptions.

Ans - D

C https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-scheduled-instances.html Scheduled Reserved Instances PDF RSS With Scheduled Reserved Instances, you can reserve capacity that is scheduled to recur daily, weekly, or monthly, with a specified start time and duration, for a one-year term. After you complete your purchase, the instances are available to launch during the time windows that you specified. Important You cannot purchase Scheduled Reserved Instances at this time. AWS does not have any capacity available for Scheduled Reserved Instances or any plans to make it available in the future. To reserve capacity, use On-Demand Capacity Reservations instead. For discounted rates, use Savings Plans.

Why not C - want to minimize the cost..... Scheduled reserved instances come with a discount of on demand. that is why we eliminate C over D but Latest Update from AWS, Schedule reserved instances are not available so answer is C

Besides that scheduled reserved instances are no longer availeble, Scheduled Reserved Instances may not be suitable for the company's use case because they are meant for applications with steady state or predictable usage. In this case, the reporting process requires 20 EC2 instances for 7 days at the beginning of every month, which is a one-time, irregular usage pattern. Scheduling Reserved Instances for the exact time the instances are needed may not be possible, and even if it is possible, the cost savings may not be significant compared to the On-Demand pricing model, especially if the instances are only needed for a short duration. Additionally, Scheduled Reserved Instances only provide cost savings if the instances are used for the entire reservation period. If the reporting process finishes earlier than 7 days, the company would still be charged for the full reservation period.

Old question should tally with old answer, beside, the latest update was to use "On-Demand Capacity Reservations" and Saving Plans for discounted rates. Not just on-demand.

D is right

You cannot purchase Scheduled Reserved Instances at this time. AWS does not have any capacity available for Scheduled Reserved Instances or any plans to make it available in the future. To reserve capacity, use On-Demand Capacity Reservations instead. For discounted rates, use Savings Plans. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-scheduled-instances.html

trick question - https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-scheduled-instances.html **** You cannot purchase Scheduled Reserved Instances at this time. AWS does not have any capacity available for Scheduled Reserved Instances or any plans to make it available in the future. To reserve capacity, use On-Demand Capacity Reservations instead. For discounted rates, use Savings Plans.

yeah, scheduled RI has gone now, but at the time when the question made, scheduled RI exists, so the answer would registered as D, then answer is D, for us and for this exam.

C. Explanation - https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-scheduled-instances.html

CCCCCCCCCCCCCCCCCCCCCC

Scheduled RI is not a thing at this time

Answer is C. On-Demand Instances

Even it's not D, i don't think it is on-demand, why not Reserved Instances?? I go for A, if D is out. Amazon EC2 Reserved Instances (RI) provide a significant discount (up to 72%) compared to On-Demand pricing and provide a capacity reservation when used in a specific Availability Zone. https://aws.amazon.com/ec2/pricing/reserved-instances/