ACA-CLOUD1 Online Practice Questions and Answers

SQL injection is a common application layer attack, usually through building special input parameters and pass it to web applications to steal or sabotage the application data. Which of the following is the target for SQL injection?

A. Web application

B. Database

C. Confidential files on the server

D. Pictures on server

Which of the following is not the database type supported by RDS?

A. MySQL

B. SQL Server

C. Postgre SQL

D. Oracle database

Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. Which of the following is not the feature supported by Alibaba Cloud Auto Scaling?

A. Elastic Scale-Out

B. Elastic Scale-In

C. Elastic Self-Health

D. Elastic Self-Diagnostic

Server Load Balancer supports protocols like ______________. (Choose four.)

A. HTTP

B. HTTPS

C. TCP

D. UDP

E. MPLS

F. MQTT

Server Load Balancer supports health checks for ECS instances and allows user to specify the frequency. If an ECS instance does not qualify the health check, traffic will not be forwarded to that instance, thereby ensuring application availability.

A. TRUE

B. FALSE

Alibaba Cloud Object Storage Service (OSS) is a massive, highly available, secured and cost effective storage service. OSS is superior than self-built storage in all these aspects. Which of the following advantage relates to the high availability of OSS?

A. Availability actually relies on the underlying hardware, which can break down easily. Once the hard disk malfunctions, it can also lead to permanent data loss.

B. Data Reliability is not less than 99.99999999%. Data is backed up automatically with multiple redundant copies.

C. Data has to be backed up by customer manually, which is time-consuming and labor-intensive.

D. The following features are available: Multiple Authentication and Authorization mechanism, Whitelist, Anti-leech URL, and Master-Sub Account

Which of the following statements is true for RDS?

A. Multiple databases can be created in one RDS instance.

B. Databases with the same name are allowed in the same instance.

C. Resources are not shared among the databases in the same RDS instance.

D. None of the above is true.

Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. It supports adding existing ECS instances into the scaling group, whose status however must be _________.

A. Running

B. Created

C. Stopped

D. Preparing

As a cloud computing service provider, Alibaba Cloud provides security services including ______. (Choose two.)

A. Security operation for underlying hardware of cloud computing.

B. Application maintenance in ECS instances.

C. Security isolation between cloud computing tenants.

D. IP white list setting for RDS.

RDS provides whitelist access policies. You can set permitted IP addresses and IP network segments to effectively prevent hackers from attacking the server by port scanning.

A. TRUE

B. FALSE