Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 241 discussion

If I'm not mistaken it's C, since for D, it's using asynchronous AWS Lambda calls and the application uses synchronous transactions.

monolithic three-tier application --> LOL its either monolithic or three tier how both????????? if Monolithic D if three tier C

Monolithic seems to exclude C.

C is the answer

synchronous means C

Keyword: Monolothic ==> it is not microservices, it is traditional 3-tier web + app + db, so nothing else. But tightly coupled. Keyword: Synchronous ==> again tightly coupled. So it is clear sky now, we have an ordinary web and app layer to be scaled. Only C will help. A will only solve app side upto some point, it cannot be. Look for monolithic keyword in the AWS Well Architected Framework Whitepaper: "Choose how to segment your workload: Monolithic architecture should be avoided. Instead, you should choose between SOA and microservices. When making each choice, balance the benefits against the complexities—what is right for a new product racing to first launch is different than what a workload built to scale from the start needs. The benefits of using smaller segments include greater agility, organizational flexibility, and scalability. Complexities include possible increased latency, more complex debugging, and increased operational burden"

D https://aws.amazon.com/tw/blogs/architecture/architecting-for-reliable-scalability/

I think it's C because question says that satisfies application response time so it should be synchronous solution.

Ans=C A -> traffic spikes would make infra inefficient B -> I will just ignore this C -> Seems OK. With Web and App scaling and ALB performance should be better, unless the problem is a lot of reads in the DB. Nothing points to the DB, but the question brings up Traffic, so reinforces the answer. D -> IMO, the monolith part just clarifies that there is no microservices, so forget about Lambda, as it would require a complete redesign

answer A. key: thre-tier monolithic (web, app and database) C is worng. cuz if u scale out web, app and db you could have data problems D is wrong this is a synchronous process so you need a response to web tier, this option states a asynchronous lambda call so no response.

C is the correct answer because question's main focus on traffic flow and application response time. ALB will handle traffic flow and autoscaling will launch more instances to respond to customer requests so that application is not sluggish. More instances means faster response.

Since it's monolithic, how can you divide it into different layers unless you rewrite the whole application. So B, C and D ruled out. I choose A.

The question asks "A solutions architect needs to design a solution that can meet required application response times while accounting for traffic volume spikes" For me, that means the monolithic design is a fail and hence a redesign is being looked at. and hence I think the answer is D

i would guess (a) since the application is monolithic and they're asking for an aws architects solition that presumably doesn't require rewriting substantial parts of the application. all i can do to fix the problem now is to vertically scale the application instance.

The word monolithic is a distraction. And leading us toward D

Ans: C

I couldnt find any where any arch consist of 3 tiers monolithic. there is one stander only called monolithic. all the resources compare between monolithic and microservices which it is the best solution for the monolithic complexity to be able to scaled and decoupled. this microservices should be done through containing ECS. as this option not available in this question the only option left is A. the monolithic can be considered as one system in one instance and can be scaled only vertically.