Exam AWS Certified Solutions Architect - Associate SAA-C03 All Questions

View all questions & answers for the AWS Certified Solutions Architect - Associate SAA-C03 exam

Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 639 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Associate SAA-C03

Question #: 639
Topic #: 1

[All AWS Certified Solutions Architect - Associate SAA-C03 Questions]

A company is building a new furniture inventory application. The company has deployed the application on a fleet ofAmazon EC2 instances across multiple Availability Zones. The EC2 instances run behind an Application Load Balancer (ALB) in their VPC.

A solutions architect has observed that incoming traffic seems to favor one EC2 instance, resulting in latency for some requests.

What should the solutions architect do to resolve this issue?

A. Disable session affinity (sticky sessions) on the ALB
B. Replace the ALB with a Network Load Balancer
C. Increase the number of EC2 instances in each Availability Zone
D. Adjust the frequency of the health checks on the ALB's target group

Show Suggested Answer

Suggested Answer: A 🗳️

by potomac at Nov. 7, 2023, 2:24 p.m.

Disclaimers:

- ExamTopics website is not related to, affiliated with, endorsed or authorized by Amazon.
- Trademarks, certification & product names are used for reference only and belong to Amazon.

Comments

Submit Cancel

ln2718

3 weeks, 6 days ago

Selected Answer: A

This is a terrible question. You don't just remove sticky sessions because of this issue, especially if the application relies on sticky sessions in the first place! Unfortunately no other answer is adequate, and you would not replace a network load balancer because you would lose some functionality that only the application load balancer has. This may be one of the worst questions so far.

upvoted 1 times

...

KennethNg923

1 year, 2 months ago

Selected Answer: A

"favor one EC2 instance" it is because you enable the sticky session feature, so you have to disable it

upvoted 2 times

...

1Alpha1

1 year, 6 months ago

Selected Answer: A

Answer: *A* Enabling stickiness may bring imbalance to the load over the backend EC2 instances since sticky sessions help the same client to always redirect to the same instance behind a load balancer.

upvoted 3 times

...

awsgeek75

1 year, 7 months ago

Selected Answer: B

The question is too vague. Doesn't say much about the application or EC2 instance setup. So: If you assume that application uses session management then A is correct. If you think application is crashing then D is correct for health checks If you don't assume anything about the application then B is also correct SMH, I'll go with B... happy to discuss

upvoted 2 times

awsgeek75

1 year, 7 months ago

I'm not entirely happy with any choice but since others have chosen A, I'm just throwing B for discussion.

upvoted 2 times

...

MikeSWA

1 year, 7 months ago

what about c? it actually helps distribute traffic equally across instances in all enabled AZs.

upvoted 2 times

mr123dd

1 year, 7 months ago

nope, if the sticky season is on, no matter how many instances you have in AZ or region, it will only send traffic to you favor session

upvoted 2 times

...

evelynsun

1 year, 8 months ago

it's A!! Session affinity is a feature of the Application Load Balancer that keeps client requests on the same EC2 instance for the duration of the session. This can cause latency issues if one EC2 instance is overloaded while others are not, as the overloaded instance will handle all subsequent requests until it is taken offline. To resolve this issue, the solutions architect should disable session affinity on the ALB. This can be done by setting the "Session affinity" parameter to "Off" in the ALB's configuration. Disabling session affinity will cause the ALB to distribute requests across all EC2 instances in the target group, rather than keeping them on a single instance. This will help to balance the load and reduce latency for all requests.

upvoted 3 times

awsgeek75

1 year, 7 months ago

I agree with A but it assumes that ALB has session affinity enabled and app doesn't require it. What if the EC2 instances are running an application that requires session affinity? I think the question is missing some important context

upvoted 2 times

...

TariqKipkemei

1 year, 8 months ago

Selected Answer: A

Disable session affinity (sticky sessions) on the ALB

upvoted 2 times

...

NickGordon

1 year, 9 months ago

Selected Answer: A

A https://repost.aws/knowledge-center/elb-fix-unequal-traffic-routing

upvoted 3 times

awsgeek75

1 year, 7 months ago

The same article says to check health of instances. This makes D as a good candidate too. "Available healthy instances aren’t evenly distributed across Availability Zones."

upvoted 4 times

...

potomac

1 year, 9 months ago

Selected Answer: A

A makes more sense than others

upvoted 3 times

...