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Exam AWS DevOps Engineer Professional topic 1 question 79 discussion

Exam question from Amazon's AWS DevOps Engineer Professional
Question #: 79
Topic #: 1
[All AWS DevOps Engineer Professional Questions]

A company manages a web application that runs on Amazon EC2 instances behind an Application Load Balancer (ALB). The EC2 instances run in an Auto
Scaling group across multiple Availability Zones. The application uses an Amazon RDS for MySQL DB instance to store the data. The company has configured
Amazon Route 53 with an alias record that points to the ALB.
Anew company guideline requires a geographically isolated disaster recovery (DR) site with an RTO of 4 hours and an RPO of 15 minutes.
Which DR strategy will meet these requirements with the LEAST change to the application stack?

  • A. Launch a replica environment of everything except Amazon RDS in a different Availability Zone. Create an RDS read replica in the new Availability Zone, and configure the new stack to point to the local RDS DB instance. Add the new stack to the Route 53 record set by using a health check to configure a failover routing policy.
  • B. Launch a replica environment of everything except Amazon RDS in a different AWS Region. Create an RDS read replica in the new Region, and configure the new stack to point to the local RDS DB instance. Add the new stack to the Route 53 record set by using a health check to configure a latency routing policy.
  • C. Launch a replica environment of everything except Amazon RDS in a different AWS Region. In the event of an outage, copy and restore the latest RDS snapshot from the primary Region to the DR Region. Adjust the Route 53 record set to point to the ALB in the DR Region.
  • D. Launch a replica environment of everything except Amazon RDS in a different AWS Region. Create an RDS read replica in the new Region, and configure the new environment to point to the local RDS DB instance. Add the new stack to the Route 53 record set by using a health check to configure a failover routing policy. In the event of an outage, promote the read replica to primary.
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Suggested Answer: D 🗳️
by ohcn at Sept. 1, 2022, 10:26 p.m.
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auxwww
9 months, 2 weeks ago
If there is a region outage, then backups may not be even accessible to restore the database, unless cross region backups are configured on the RDS instance. C - Doesn't state this. RPO and RTO cannot be achieved due to the above scenario. D - is least change to stack. RPO and RTO are guaranteed even with an AWS Region outage let alone customer specific regional outage.
upvoted 1 times
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DucSiu
1 year, 4 months ago
D is correct
upvoted 1 times
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ParagSanyashiv
1 year, 11 months ago
Selected Answer: D
D is more suitable. Putting the stress on Failover concept for disaster recovery.
upvoted 1 times
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sasa33_p
2 years, 1 month ago
Selected Answer: D
D looks good.
upvoted 1 times
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saeidp
2 years, 2 months ago
D is correct. Creating snapshot after outage is too late. RPO is the time between snapshots that DR can tolerate
upvoted 2 times
saeidp
2 years, 2 months ago
Latest snapshot might be older than 15 minutes. Answere doesn't say anything about the last time snapshot has been created. it just say latest snapshot
upvoted 1 times
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bihani
2 years, 2 months ago
Selected Answer: D
Answering C is plain stupid. You can achieve the 15 mins RPO with C. D is correct answer.
upvoted 1 times
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Piccaso
2 years, 2 months ago
Selected Answer: D
A must be wrong because of "in a different Availability Zone" B is eliminated because of "latency routing policy". Between C and D, the correct answer shows C, I do not understand. Some people say that "RTO of 4 hours and RPO of 15 minutes" does not require "read replica". However, it's not guaranteed that the steps in C can be done in the limited time length.
upvoted 2 times
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Bulti
2 years, 3 months ago
D is the correct answer
upvoted 1 times
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syaldram
2 years, 7 months ago
D is the asnwer!
upvoted 2 times
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helloworldabc
2 years, 7 months ago
DDDDDDDD
upvoted 2 times
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ohcn
2 years, 7 months ago
Selected Answer: D
D - https://www.examtopics.com/discussions/amazon/view/2840-exam-aws-devops-engineer-professional-topic-1-question-36/
upvoted 2 times
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C (25%)
B (20%)
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