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Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 882 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Associate SAA-C03
Question #: 882
Topic #: 1
[All AWS Certified Solutions Architect - Associate SAA-C03 Questions]

A company runs its application by using Amazon EC2 instances and AWS Lambda functions. The EC2 instances run in private subnets of a VPC. The Lambda functions need direct network access to the EC2 instances for the application to work.

The application will run for 1 year. The number of Lambda functions that the application uses will increase during the 1-year period. The company must minimize costs on all application resources.

Which solution will meet these requirements?

  • A. Purchase an EC2 Instance Savings Plan. Connect the Lambda functions to the private subnets that contain the EC2 instances.
  • B. Purchase an EC2 Instance Savings Plan. Connect the Lambda functions to new public subnets in the same VPC where the EC2 instances run.
  • C. Purchase a Compute Savings Plan. Connect the Lambda functions to the private subnets that contain the EC2 instances.
  • D. Purchase a Compute Savings Plan. Keep the Lambda functions in the Lambda service VPC.
Show Suggested Answer Hide Answer
Suggested Answer: C 🗳️
Community vote distribution
C (77%)
A (15%)
8%
by Guru4Cloud at April 11, 2024, 2:55 p.m.
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Guru4Cloud
Highly Voted 11 months, 3 weeks ago
Selected Answer: C
Compute Savings Plan: This plan offers significant discounts on Lambda functions compared to on-demand pricing. Since the application will run for a year, a sustained use discount like Compute Savings Plan is ideal. Private Subnets: Lambda functions in private subnets can directly access EC2 instances within the VPC without needing internet access, reducing security risks and potential egress costs.
upvoted 7 times
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LeonSauveterre
Most Recent 2 months, 4 weeks ago
Selected Answer: C
Why Compute Savings Plan: Covers both EC2 and Lambda, providing flexibility as Lambda usage increases. Why Private Subnets: Ensures network access between Lambda and EC2 instances. !! An EC2 Instance Savings Plan doesn't cover Lambda. Also, Lambda functions in public subnets cannot directly communicate with EC2 instances in private subnets.
upvoted 1 times
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mk168898
5 months, 1 week ago
A and B is not because it is talkign about EC2, but the question is asking for Lambda
upvoted 2 times
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jacinml
5 months, 2 weeks ago
Selected Answer: C
Compute savings include lamdba and EC2, Ec2 savings only EC2 instances. https://aws.amazon.com/savingsplans/compute-pricing/
upvoted 2 times
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Lin878
9 months ago
I confuse this Question. Instance saving plan is cheaper than compute saving plan. https://aws.amazon.com/savingsplans/compute-pricing/
upvoted 1 times
navneet_sh
8 months, 3 weeks ago
But composite saving plan discount Automatically applies to Lambda.
upvoted 2 times
navneet_sh
8 months, 3 weeks ago
Sorry I mean Compute Savings Plan.
upvoted 2 times
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sheilawu
9 months, 4 weeks ago
Selected Answer: A
In this question has point out "access EC2 instances" within VPC,=> Lambda VPC to an ENI (Elastic network interface) in your account VPC.=>No charge. Therefore I stick with A, Not D.
upvoted 2 times
JohnYu
5 months, 2 weeks ago
An EC2 Instance Savings Plan is limited to savings on EC2 instances only. It does not provide cost savings for Lambda functions. Therefore, it is not the best choice given that the number of Lambda functions is expected to increase.
upvoted 3 times
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sheilawu
9 months, 4 weeks ago
I am sorry I mean C
upvoted 3 times
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Scheldon
10 months, 1 week ago
Selected Answer: D
AnswerD https://docs.aws.amazon.com/lambda/latest/dg/foundation-networking.html
upvoted 1 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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