Alibaba Cloud ACA-Developer 問題集

質問 1：
For business scenarios with strong data reliability requirements or financial business scenarios with regulatory requirements related to data durability and availability, RDS MySQL provides a remote backup mechanism to improve reliability. Which of the following is correct, regarding RDS's remote disaster recovery capabilities?
(Number of correct answers: 3)
A. When an outage occurs in the area where the primary instance is located, and neither the primary instance (Master) nor the standby instance (Slave) can be connected to, the remote disaster recovery instance can be switched to the primary instance
B. RDS realizes real-time synchronization between the master instance and the remote disaster recovery instance through Data Transmission Service (DTS)
C. When the database deletion operation is performed on the master instance, the operation will also be synchronized to the disaster recovery instance
D. The primary database (the one to be backed up) must have an Alibaba Cloud Intranet address
正解：C

質問 2：
Which of the following features are unique to Alibaba Cloud Container Registry, as compared with Docker Hub? (Number of correct answers: 2)
A. You can set your image repository access to public or private.
B. For source code hosted on websites outside China, Container Registry can use servers outside China to build Docker images, even when you are using a Container Registry instance in Mainland China.
C. Container Registry can automatically build new Docker images when source code changes.
D. You can create and delete image repositories in different regions based on your needs.
正解：A,B

質問 3：
To meet data analytics requirements on large datasets, which of these databases can meet the demand for structured and semi-structured storage for almost all types of data, albeit with limited support for strong transactions?
A. TSDB
B. RDSMariaDB
C. OceanBase
D. HBase
正解：B

質問 4：
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. The built-in firewall on ECS-A has rules that prohibit external access to the MySQL service port.
B. No Internet IP address is configured for ECS-A.
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.
正解：B,C

質問 5：
By default Function Compute cannot access resources within a VPC network group. To enable Function Compute to access resources located in a VPC, which of the following parameters needs to be configured?
(Number of correct answers: 3)
A. vpcld
B. ENIID
C. securityGroupId
D. vSwitchlds
正解：A,C,D
解説: (Topexam メンバーにのみ表示されます)

質問 6：
Which of the following operations can be performed through Log Service sAPI? (Number of correct answers:
3)
A. Deliver logs to OSS for storage and analysis
B. Access control for different users
C. Create a Logstore, write and read logs to the Logstore
D. Collect logs based on Logtail configuration and Logtail machine group information
正解：B,C,D

質問 7：
Alibaba Cloud Log Service is a Pay-As-You-Go service. The billing unit is 7 day, and the configuration can be adjusted at any time: fees are charged according to actual usage. Which of the following are the main charges for Log Service? (Number of correct answers: 3)
A. Storage capacity
B. Query analysis
C. Index traffic after index configuration
D. Read and write traffic
正解：A,C,D

質問 8：
Which data format is NOT supported by Alibaba Cloud Message Service?
A. VERBOSE
B. XML
C. JSON
D. SIMPLIFIED
正解：A

質問 9：
Which of the following options are correct for Multipart Upload and Resumable Upload in Object Storage Service (OSS)? (Number of correct answers: 3)
A. Multipart Upload is usually used when the size of the file to be uploaded is large
B. If the upload fails due to an accident during the uploading of fragments, you need to upload all the fragments again
C. After an upload is interrupted, the portions of the file which have successfully uploaded prior to the interruption will be saved in the OSS bucket
D. Use Multipart Upload to upload parts of a file in parallel to speed up the upload process
正解：A,B,D