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Exam AWS Certified DevOps Engineer - Professional DOP-C02 topic 1 question 107 discussion

Exam question from Amazon's AWS Certified DevOps Engineer - Professional DOP-C02
Question #: 107
Topic #: 1
[All AWS Certified DevOps Engineer - Professional DOP-C02 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.

A new 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 devnv at May 14, 2023, 12:20 p.m.
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YR4591
Highly Voted 1 year ago
Selected Answer: D
D is correct. Failover policy will route traffic to the ALB in the backup region.
upvoted 5 times
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youonebe
Most Recent 4 months, 2 weeks ago
Selected Answer: D
D is correct. My answer was C, but GPT told me this: This process does not guarantee a quick recovery within the 4-hour RTO. Restoring from a snapshot would take significant time, and it doesn't provide continuous replication of data to minimize RPO. This option does not meet the RTO requirement because the recovery process (snapshot restore) will take too long. It also doesn’t address continuous data replication, leading to a higher potential RPO.
upvoted 1 times
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dkp
6 months, 3 weeks ago
Selected Answer: D
geographically isolated location applies to option D
upvoted 2 times
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WhyIronMan
7 months, 1 week ago
Selected Answer: D
Answer is D. A. It did not cover the whole scenario. there is a need to promote the read replica otherwise the application in the region will not be able to write in that rds. Also, another Region means geographically isolated, while other Az will not solve the problem. Details are everything during an investigation...
upvoted 3 times
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WhyIronMan
7 months, 1 week ago
Answer is D. A. It did not cover the whole scenario. there is a need to promote the read replica otherwise the application in the region will not be able to write in that rds. Also, another Region means geographically isolated, while other Az will not solve the problem. Details are everything during an investigation...
upvoted 1 times
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jojom19980
8 months, 3 weeks ago
Selected Answer: A
they mentioned geographically not regional , the cost will be more if we make it regional so we can go with the AZ DR
upvoted 2 times
WhyIronMan
7 months, 1 week ago
A did not cover the whole scenario. there is a need to promote the read replica otherwise the application in the region will not be able to write in that rds. Also, another Region means geographically isolated. Details are everything during an investigation...
upvoted 1 times
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thanhnv142
9 months ago
Selected Answer: D
D is correct: < configured Amazon Route 53> and <requires a geographically isolated disaster recovery (DR) site> means fail-over routing and the DR site should be in another region A: <Amazon RDS in a different Availability Zone>: We need to setup the DB in a different region, not in a different AZ, which is still in the same region B and C: no mention of fail-over
upvoted 3 times
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sarlos
10 months, 1 week ago
D is the answer
upvoted 2 times
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HugoFM
11 months, 1 week ago
What about C? I have an RTO of 4 hours I mean we got time we dont need a read replica we could take time to restore from a snapshot
upvoted 3 times
davdan99
10 months ago
Restore Time vs. RTO: While 4 hours might seem like a sufficient window for restoring a snapshot, the actual restore time can vary depending on several factors: Snapshot size: Larger snapshots take longer to restore. RDS instance type: High-performance instance types can handle restorations faster. Network bandwidth: Sufficient bandwidth is crucial for speedy data transfer during restoration. RDS engine version: Newer versions might have optimized restore processes. In practice, restoring a large RDS snapshot, especially across Regions, could easily take more than 15 minutes, potentially exceeding the RPO and resulting in data loss.
upvoted 2 times
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haazybanj
1 year, 4 months ago
Selected Answer: D
D is right
upvoted 4 times
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Kodoma
1 year, 5 months ago
D is true
upvoted 2 times
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devnv
1 year, 5 months ago
D is correct
upvoted 1 times
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