Exam AWS Certified Developer - Associate DVA-C02 topic 1 question 6 discussion

Option D is the correct answer. In the CloudFormation template, the developer should create a parameter with the list of approved EC2 instance types as AllowedValues. This way, users can select the instance type they want to use when launching the CloudFormation stack, but only from the approved list. Option A is not a scalable solution as it requires creating a separate CloudFormation template for each EC2 instance type, which can become cumbersome and difficult to manage as the number of approved instance types grows. Option B is not necessary as creating resources for each EC2 instance type in the list would not enforce the requirement to choose only from the approved list. It would also increase the complexity of the template and make it difficult to manage. Option C is not ideal as it would require creating a separate parameter for each EC2 instance type, which can become difficult to manage as the number of approved instance types grows. Also, it does not enforce the requirement to choose only from the approved list.

Got this question in exam.Correct answer is D.

list is the solution

A) Eliminated - higher maintenance overhead for maintaining multiple templates B) Eliminated - This would create multiple EC2 instances unnecessarily, which does not align with the requirement to choose a single instance type from a list.

==> Discard A: duplicate code, hard to maintain ==> Discard B: all resource wil be created instead of it is neccessary or not ==> Discard C: multiple param ==> when have larger param count, hard to maintain D for dynamic for fixed parameter ==> most generic

Parameters: InstanceType: Type: String Default: 't2.micro' AllowedValues: - 't2.micro' - 't2.small' - 't2.medium' - 't3.micro' - 't3.small' - 't3.medium' Description: 'Select the EC2 instance type for deployment.' Resources: MyEC2Instance: Type: 'AWS::EC2::Instance' Properties: ImageId: ami-12345678 InstanceType: !Ref InstanceType

D is correct

D is the correct answer.

Correcta D. Con este parámetro se permite dar permisos de elegir el tipo de instancia.

option D is correct

D is correct

D is the correct, because you are restricting the possible options to that parameter

Why B instead of C? Each AWS SDK implements retry logic automatically. Most AWS SDKs now support exponential backoff and jitter as part of their retry behavior Then D to increase capacity https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/TroubleshootingThrottling.html C&D

D looks about right

It should be D

D https://www.examtopics.com/discussions/amazon/view/88788-exam-aws-certified-developer-associate-topic-1-question-343/