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Exam AWS Certified SysOps Administrator - Associate topic 1 question 222 discussion

Exam question from Amazon's AWS Certified SysOps Administrator - Associate
Question #: 222
Topic #: 1
[All AWS Certified SysOps Administrator - Associate Questions]

A company is deploying a third-party unit testing solution that is delivered as an Amazon EC2 Amazon Machine Image (AMI). All system configuration data is stored in Amazon DynamoDB. The testing results are stored in Amazon S3.

A minimum of three EC2 instances are required to operate the product. The company’s testing team wants to use an additional three EC2 instances when the Spot Instance prices are at a certain threshold. A SysOps administrator must implement a highly available solution that provides this functionality.

Which solution will meet these requirements with the LEAST operational overhead?

  • A. Define an Amazon EC2 Auto Scaling group by using a launch configuration. Use the provided AMI in the launch configuration. Configure three On-Demand Instances and three Spot Instances. Configure a maximum Spot Instance price in the launch configuration.
  • B. Define an Amazon EC2 Auto Scaling group by using a launch template. Use the provided AMI in the launch template. Configure three On-Demand Instances and three Spot instances. Configure a maximum Spot Instance price in the launch template.
  • C. Define two Amazon EC2 Auto Scaling groups by using launch configurations. Use the provided AMI in the launch configurations. Configure three On-Demand Instances for one Auto Scaling group. Configure three Spot Instances for the other Auto Scaling group. Configure a maximum Spot Instance price in the launch configuration for the Auto Scaling group that has Spot Instances.
  • D. Define two Amazon EC2 Auto Scaling groups by using launch templates. Use the provides AMI in the launch templates. Configure three On-Demand Instances for one Auto Scaling group. Configure three Spot Instances for the other Auto Scaling group. Configure a maximum Spot Instance price in the launch template for the Auto Scaling group that has Spot Instances.
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Suggested Answer: B 🗳️
by zolthar_z at Jan. 3, 2023, 3:17 p.m.
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nharaz
10 months ago
Selected Answer: B
https://jayendrapatil.com/aws-auto-scaling-launch-template-vs-launch-configuration/
upvoted 2 times
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nharaz
10 months ago
Selected Answer: B
Not all Amazon EC2 Auto Scaling features are available when you use launch configurations. For example, you cannot create an Auto Scaling group that launches both Spot and On-Demand Instances or that specifies multiple instance types. You must use a launch template to configure these features. https://docs.aws.amazon.com/autoscaling/ec2/userguide/launch-templates.html
upvoted 3 times
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TareDHakim
10 months ago
Selected Answer: D
Agree with D - "Additional" is a keyword.
upvoted 1 times
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xSohox
1 year, 2 months ago
Selected Answer: B
With LEAST operational overhead it is B.
upvoted 2 times
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Christina666
1 year, 3 months ago
Selected Answer: B
Option B provides a straightforward and streamlined solution with the least operational overhead. Using an Amazon EC2 Auto Scaling group with a launch template allows you to define the desired instance configuration, including the AMI, instance type, and Spot Instance pricing, in a single template. By configuring both On-Demand and Spot Instances in the same Auto Scaling group, you ensure that the application will have the required number of instances (minimum of three) and that additional Spot Instances will be used when the Spot Instance prices meet the specified threshold.
upvoted 4 times
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Phinx
1 year, 8 months ago
Selected Answer: B
It's B. You can configure a mix of On-Demand and Spot Instances in one Auto Scaling Group.
upvoted 4 times
eboehm
1 year, 3 months ago
wrong its D. While you can mix and match On-Demand and spot instances, the scenario clearly states launch 3 ADDITIONAL instances when the spot price is met. This can not be met with a mix and match solution
upvoted 1 times
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awsguru1998
1 year, 8 months ago
C... Launch configurations require additional configuration steps, such as specifying instance types and setting up scaling policies, that are not needed when using launch templates. Launch templates also provide parameterization capabilities that enable you to customize the configuration for each instance. This simplifies the launch configuration process and reduces operational overhead.
upvoted 2 times
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Deeezz
1 year, 8 months ago
Selected Answer: D
Has to be D. You can NOT have different Instance types in a ASG.
upvoted 1 times
defmania00
1 year, 8 months ago
Looks like it's B, D works as well, but it's not the LEAST operational overhead. https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-mixed-instances-groups.html
upvoted 1 times
defmania00
1 year, 8 months ago
Thinking about this, it looks like it's D, and the key for that is "configure a maximum spot instance price...". While you can use both on-demand and spot in the same ASG, you can only specify the percentages of each to launch. You can configure a maximul spot price in the launch template for the one which has Spot instances though. So this comes down to C vs. D. D is the way AWS would encourage us to do it, use launch templates and give up on using launch configurations. The "LEAST operation overhead" would also suggest using D, you don't want the overhead of having to switch from launch configrations to lauch templates later down the line.
upvoted 1 times
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Domdom120
1 year, 8 months ago
It's B. AWS actually encourages a mixture of On-Demand & Spot Instances within a single ASG. "You can launch and automatically scale a fleet of On-Demand Instances and Spot Instances within a single Auto Scaling group. In addition to receiving discounts for using Spot Instances, you can use Reserved Instances or a Savings Plan to receive discounted rates of the regular On-Demand Instance pricing. All of these factors combined help you to optimize your cost savings for EC2 instances and help you get the desired scale and performance for your application." "Although you can use one instance type, it's a best practice to use multiple instance types. This way, Amazon EC2 Auto Scaling can launch another instance type if there is insufficient instance capacity in your chosen Availability Zones." https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-mixed-instances-groups.html
upvoted 5 times
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zolthar_z
1 year, 10 months ago
Selected Answer: B
Ans is B
upvoted 3 times
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