Alibaba ACA-CloudNative Exam - Topic 4 Question 109 Discussion

Actual exam question for Alibaba's ACA-CloudNative exam

Question #: 109
Topic #: 4

Choose the statements that are TRUE about Microservices architecture in microservice pattern? (The number of correct answer: 2)

AAll communications and business logic should use a middleware called ESB(enterprise service bus), so all service maintenance will be in one place.

BExternal applications should use API Gateway

CCommunications from other applications should directly use Database PL/SQL, it will become efficient

DCommunication in microservices architecture should use Proxy and VPN, and it will be more secured

EUse session from webservice for stateless Authentication R Use JSON Web Tokens(JWT) for stateless Authentication

Show Suggested Answer

Suggested Answer: A, B

by Roxane at Mar 23, 2025, 04:10 PM

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Shelba

1 month ago

Wait, using Proxy and VPN for communication? That’s new to me!

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Donte

1 month ago

C sounds really off, direct DB access isn't efficient!

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Elfrieda

2 months ago

I disagree with A, ESB isn't always needed.

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Isabella

2 months ago

I vaguely recall that direct database access from other applications isn't a good practice in microservices, which makes option C seem wrong.

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Virgie

2 months ago

I feel like using JWT for stateless authentication is a common practice in microservices, so option E might be correct too.

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Pearly

2 months ago

I'm not entirely sure about ESB being necessary for microservices; I thought the idea was to avoid a single point of failure, which makes option A seem questionable.

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Desiree

2 months ago

B and E are definitely true!

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Doug

2 months ago

I remember we discussed that API Gateway is crucial for managing external application requests, so I think option B is definitely true.

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Buck

3 months ago

E is a must for stateless auth, love JWT!

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Daniel

3 months ago

I feel pretty confident about this one. The API Gateway and stateless authentication using JWT are definitely key aspects of microservices architecture. I'll select those options.

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Ligia

3 months ago

I'm a bit confused by some of these choices. Using a VPN for communication doesn't sound like a microservices best practice to me. I'll have to double-check my understanding of the core principles.

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Roxane

3 months ago

Okay, I've got a strategy here. I'll start by eliminating the clearly wrong answers, like the one about using the database directly. Then I can focus on evaluating the remaining options.

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Louann

4 months ago

Hmm, the question is asking about true statements, so I'll need to analyze each option closely. The ESB one seems questionable, but the API Gateway option sounds right.

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Javier

4 months ago

This looks like a tricky question on microservices architecture. I'll need to carefully review the options and think through the best practices.

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Lorriane

4 months ago

Whoa, that's a lot of information to digest. I better take my time and really think through each option to make sure I don't miss anything important.

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Tiera

4 months ago

I'm feeling pretty confident about this one. The correct answers are B and E - using an API gateway for external applications and JSON Web Tokens for stateless authentication.

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Tandra

4 months ago

Okay, I think I've got a handle on this. The key is to identify the options that align with best practices for microservices, like using an API gateway and stateless authentication.

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Emmett

5 months ago

Hmm, I'm a bit unsure about this one. The options seem to cover a range of different microservices concepts, and I'll need to make sure I understand the differences between them.

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Arthur

5 months ago

This looks like a tricky question on microservices architecture. I'll need to carefully read through the options and think about the best practices for microservices communication and security.

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Willie

10 months ago

JWT for stateless authentication? That's the way to go! No more session headaches in my microservices.

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Kyoko

10 months ago

E) Use JSON Web Tokens(JWT) for stateless Authentication

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Eve

10 months ago

B) External applications should use API Gateway

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Keneth

11 months ago

I'm not sure about A, but I definitely think B and E are crucial for Microservices architecture.

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Lino

11 months ago

D is just overkill. Proxy and VPN? Microservices are supposed to be lightweight and scalable, not a fortress!

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Carey

9 months ago

Definitely, the whole point of microservices is to make things more efficient and flexible.

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Jules

9 months ago

I agree, D does seem like overkill. Microservices should be lightweight and scalable.

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Inocencia

9 months ago

E) Use session from webservice for stateless Authentication R Use JSON Web Tokens(JWT) for stateless Authentication

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Ligia

10 months ago

B) External applications should use API Gateway

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Daryl

11 months ago

I believe A and D are also correct. Using ESB and Proxy/VPN can enhance security and maintenance.

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Luther

11 months ago

Haha, C is a terrible idea! Accessing the database directly from external apps? That's like inviting a hacker to your house and giving them the keys.

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Queenie

10 months ago

I agree, accessing the database directly is a huge security risk!

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Georgiann

10 months ago

E) Use session from webservice for stateless Authentication R Use JSON Web Tokens(JWT) for stateless Authentication

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Brittni

10 months ago

B) External applications should use API Gateway

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Vincenza

11 months ago

B and E are the correct answers. Using a middleware like ESB goes against the core principles of microservices, and direct database access is a big no-no.

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