Amazon Exam DOP-C01 Topic 2 Question 85 Discussion

Actual exam question for Amazon's DOP-C01 exam

Question #: 85
Topic #: 2

A company is migrating an application to AWS that runs on a single Amazon EC2 instance. Because of licensing limitations, the application does not support horizontal scaling. The application will be using Amazon Aurora for its database. How can the DevOps Engineer architect automated healing to automatically recover from EC2 and Aurora failures, in addition to recovering across Availability Zones (AZs), in the MOST cost-effective manner?

ACreate an EC2 Auto Scaling group with a minimum and maximum instance count of 1, and have it span across AZs. Use a single-node Aurora instance.

BCreate an EC2 instance and enable instance recovery. Create an Aurora database with a read replica in a second AZ, and promote it to a primary database instance if the primary database instance fails.

CCreate an Amazon CloudWatch Events rule to trigger an AWS Lambda function to start a new EC2 instance in an available AZ when the instance status reaches a failure state. Create an Aurora database with a read replica in a second AZ, and promote it to a primary database instance when the primary database instance fails.

DAssign an Elastic IP address on the instance. Create a second EC2 instance in a second AZ. Create an Amazon CloudWatch Events rule to trigger an AWS Lambda function to move the Elastic IP address to the second instance when the first instance fails. Use a single-node Aurora instance.

Show Suggested Answer

Suggested Answer: C

by Stephane at Jan 22, 2024, 10:13 PM

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Shawnda

1 years ago

Ah, the age-old debate: DynamoDB vs. Redis. You both make good points. I think it really comes down to the specific data access patterns and requirements. If the company needs to prioritize fast reads over writes, then yeah, the Redis option could be a better fit. But either way, the global distribution is key, so those are the two best options in my opinion.

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Aretha

1 years ago

Hmm, I'm not so sure about DynamoDB. While it's a great choice for global data distribution, I'm wondering if the write performance might be a bottleneck with that many users. Maybe something more optimized for reads, like Redis, could work better? Option D with ElastiCache Redis replication groups might be worth considering.

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1 years ago

This is a tricky question. The key requirements here are low latency and global data availability. I'm thinking that option C, Amazon DynamoDB global tables, might be the best solution. DynamoDB can handle the high user volume and the global tables feature will ensure the data is accessible across all six Regions.

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