Online Access Free ACA-Developer Practice Test

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)

• A.No Internet IP address is configured for ECS-A.
• B.The built-in firewall on ECS-A has rules that prohibit external access to the MySQL service port.
• C.The bind-address parameter set in the my.ini configuration file of the MySQL service is commented out.
• D.The security group for ECS-A does not have the default MySQL service port open.

Which of the following errors may occur when you access an image stored in Object Storage Service, and attach an image processing URL parameter to the URL ? (Number of correct answers: 3)

• A.NoSuchObject
• B.NoSuchKey
• C.NoSuchBucket
• D.NoSuchFile
• E.NoSuchStyle

You want to deploy a LAMP development environment in Alibaba Cloud's Singapore region, and you want to simultaneously bind a domain name and configure HTTPS. Which of these services can help you accomplish this quickly and easily?

• A.Elastic Compute Service (ECS)
• B.Elastic Container Instance (ECI)
• C.Simple Application Server (SAS)
• D.Alibaba Cloud Container Service for Kubernetes (ACK)

A Developer is asked to implement a caching layer in front of RDS. Cached content is expensive to regenerate in case of service failure. Which implementation below would work while maintaining maximum uptime?

• A.Install Redis on an ECS instance
• B.Implement ApsaraDB for Redis in Standard Mode
• C.Migrate the ROS database to HBase to save the cache layer
• D.Implement ApsaraDB for Redis in Cluster Mode

Which of these are suitable use cases for Alibaba Cloud's ApsaraDB for Redis service? (Number of correct answers: 3)

• A.Online gaming user rankings (scoreboard)
• B.E-Commerce sales & promotions
• C.Live video chat system
• D.Enterprise OA system