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Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 482 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Associate SAA-C02
Question #: 482
Topic #: 1
[All AWS Certified Solutions Architect - Associate SAA-C02 Questions]

A company designed a stateless two-tier application that uses Amazon EC2 in a single Availability Zone and an Amazon RDS Multi-AZ DB instance. New company management wants to ensure the application is highly available.
What should a solutions architect do to meet this requirement?

  • A. Configure the application to use Multi-AZ EC2 Auto Scaling and create an Application Load Balancer.
  • B. Configure the application to take snapshots of the EC2 instances and send them to a different AWS Region.
  • C. Configure the application to use Amazon Route 53 latency-based routing to feed requests to the application.
  • D. Configure Amazon Route 53 rules to handle incoming requests and create a Multi-AZ Application Load Balancer.
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Suggested Answer: A 🗳️
by swadeey at Aug. 31, 2021, 10:51 a.m.
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Jamati
Highly Voted 3 years, 7 months ago
I go with A
upvoted 15 times
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examJack
Most Recent 3 years, 2 months ago
Selected Answer: A
A.(O) Amazon EC2 Auto Scaling : Add and remove Availability Zones https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-add-availability-zone.html B.(X) snapshot moving spends time and manual costs C.(X) Amazon Route 53 in one AZ EC2 layer is not suitable. D.(X) Amazon Route 53 in one AZ EC2 layer is not suitable.
upvoted 2 times
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nqthien041292
3 years, 2 months ago
It's A, D is not correct because WITHOUT auto-scaling - it's not high availability, ALB just balancing the request between the instances. Example, ALB is useless when all instances down.
upvoted 1 times
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rukkoth
3 years, 5 months ago
One of simple question with basics. Answer should be - AAAA
upvoted 3 times
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iwin1203
3 years, 6 months ago
It's A, NOT D No need for Multi-AZ ALB because EC2 is in single-AZ. If EC2's AZ fails then Multi-AZ ALB is useless. Definitely Multi-AZ EC2 with Scaling for HA
upvoted 4 times
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AWSExplorer
3 years, 6 months ago
Correct Answer should be D because, question says company need High avability and do not talk anything about scalability. Amazon Route 53 is the only AWS service which provides 100% availability SLA
upvoted 2 times
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rb39
3 years, 7 months ago
A, D would leave the EC2 instances running in just one AZ
upvoted 2 times
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vvsandipvv
3 years, 8 months ago
AAAAAAA
upvoted 3 times
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swadeey
3 years, 8 months ago
D seems to be correct. The requirement is Highly available so Multi-Az application load balancer is enough. Auto-scaling not needed as there is no concern on performance. Also since application is stateless (returning same information) DNS Route 53 will help balance the requests
upvoted 3 times
vvsandipvv
3 years, 8 months ago
But why Route 53?? I would go for A ,makes more sense
upvoted 3 times
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xAlx
3 years, 7 months ago
D leaves single zone for EC2, but behind Load Balancer. It is not highly availabale
upvoted 2 times
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C (25%)
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