When a user uses a Huawei Cloud RDS for MySQL instance, the modification of the master-slave synchronization method of the database needs to restart the instance to take effect.

• A.False
• B.True

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Which of the following description of RDBMS (relational database management system) are correct? (Multiple choice)

• A.Oracle is an RDBMS
• B.RDBMS is mainly used to manage relational databases.
• C.RDBMS provides data consistency and concurrency control capability.
• D.The application program needs to be modified when the logical structure of RDBMS data changes.

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A customer uses the ECS service of HUAWEI CLOUD. In order to share files on the ECS instance with other ECS instances more conveniently, which type of storage service is recommended for tenants?

• A.Exclusive distributed storage service DSS
• B.Storage disaster recovery service SDRS
• C.Cloud hard disk EVS
• D.Resilient File Service SFS

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Some business systems of the user are deployed on Huawei Cloud and plan to use Huawei Cloud APM to monitor the performance of applications. Which of the following applications can be connected to Huawei Cloud APM? (Multiple choice)

• A.Java application deployed on ECS3 cloud server.
• B.PHP application deployed on BMS bare metal cluster.
• C.PHP application deployed in the ServiceStage container.
• D.Java applications deployed in the CCE cloud container engine cluster.

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Huawei Cloud DCS distributed storage report service provides support for RedisfOMemcached database version. Which of the following descriptions about the comparison of Reds and Memcached is wrong?

• A.Memcached does not support persistence of teaching data, Redis can support scenarios that require persistent storage of data.
• B.The aue value of a single stored object in Memcached cannot exceed 1M. For scenarios exceeding 1M, Redis is recommended.
• C.Memcached is suitable for caching with a simple data structure model, and Redis is suitable for caching farms with complex data structures.
• D.Memcached is single-core and single-threaded, Redis supports multi-threading, and performance can be improved by increasing the amount of CPU.

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