Alibaba Exam ACA-Developer Topic 1 Question 42 Discussion

Actual exam question for Alibaba's ACA-Developer exam

Question #: 42
Topic #: 1

A developer creates a MySQL database service on a Linux ECS instance (ECS-A), and wants to access this database service from another instance (ECS-B) in the same VPC using the private IP address bound to the ECS instance, however, the connection can't be established. What could cause this? (Number of correct answers: 2)

AThe security group for ECS-A does not have the default MySQL service port open.

BThe built-in firewall on ECS-A has rules that prohibit external access to the MySQL service port.

CNo Internet IP address is configured for ECS-A.

DThe bind-address parameter set in the my.ini configuration file of the MySQL service is commented out.

Show Suggested Answer

Suggested Answer: B, C, D

by Cory at May 30, 2023, 11:22 AM

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Janna

2 days ago

Hmm, I think it's definitely the security group and the firewall rules. Gotta make sure those ports are open, no matter how obvious it seems. Rookie mistake, but we've all been there, right?

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