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Exam AWS Certified Solutions Architect - Professional topic 1 question 761 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional

Question #: 761
Topic #: 1

[All AWS Certified Solutions Architect - Professional Questions]

A solutions architect is building a web application that uses an Amazon RDS for PostgreSQL DB instance. The DB instance is expected to receive many more reads than writes. The solutions architect needs to ensure that the large amount of read traffic can be accommodated and that the DB instance is highly available.
Which steps should the solutions architect take to meet these requirements? (Choose three.)

A. Create multiple read replicas and put them into an Auto Scaling group.
B. Create multiple read replicas in different Availability Zones.
C. Create an Amazon Route 53 hosted zone and a record set for each read replica with a TTL and a weighted routing policy.
D. Create an Application Load Balancer (ALB) and put the read replicas behind the ALB.
E. Configure an Amazon CloudWatch alarm to detect a failed read replicas. Set the alarm to directly invoke an AWS Lambda function to delete its Route 53 record set.
F. Configure an Amazon Route 53 health check for each read replica using its endpoint.

Show Suggested Answer

Suggested Answer: BDE 🗳️

by pkboy78 at Aug. 20, 2021, 1:24 a.m.

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Comments

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pablobairat

Highly Voted 3 years, 9 months ago

B,C,F Source: https://aws.amazon.com/premiumsupport/knowledge-center/requests-rds-read-replicas/

upvoted 17 times

sergioandreslq

3 years, 8 months ago

Why not B-D-E? I liked B,C,F, however, B-D-E can be a possible solution. Either way, I go with B,C,F but if possible to know why the other are not correct?

upvoted 2 times

Viper57

3 years, 8 months ago

You cannot use an ALB to distribute traffic to read replicas, you need to use a Route53 weighted routing policy.

upvoted 9 times

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kadev

2 years, 10 months ago

ALB supports http protocol ( L7) , To use Mysql you must connect via TCP ( L4)

upvoted 1 times

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patrickznk

Highly Voted 3 years, 1 month ago

B,C,E I believe Route53 can not check an endpoint in a private Subnet. Therefore we need to create a Cloudwatch Alarm and check the state of the Cloudwatch Alarm.

upvoted 7 times

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sumaju

Most Recent 1 year, 6 months ago

Selected Answer: BCE

Route 53 health check is only for Public IP address. So F is incorrect. https://aws.amazon.com/blogs/networking-and-content-delivery/performing-route-53-health-checks-on-private-resources-in-a-vpc-with-aws-lambda-and-amazon-cloudwatch/

upvoted 1 times

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evargasbrz

2 years, 6 months ago

Selected Answer: BCF

I'll go with B, C and F Use Amazon Route 53 weighted record sets to distribute requests across your read replicas, but you need to configure Route 53 health checks to be sure that Route 53 discards traffic to unavailable read replicas.

upvoted 1 times

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hilft

2 years, 11 months ago

B and C is the must. F, i will memorize.

upvoted 2 times

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kangtamo

3 years, 1 month ago

Selected Answer: BCF

Agree with BCF

upvoted 1 times

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AzureDP900

3 years, 7 months ago

Agree with BCF.

upvoted 2 times

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andylogan

3 years, 8 months ago

It's B C F You can use Amazon Route 53 weighted record sets to distribute requests across your read replicas. Within a Route 53 hosted zone, create individual record sets for each DNS endpoint associated with your read replicas and give them the same weight. Then, direct requests to the endpoint of the record set. You can incorporate Route 53 health checks to be sure that Route 53 directs traffic away from unavailable read replicas

upvoted 1 times

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