Alibaba Cloud Certified Associate (ACA) Practice Test 2025 – Complete All-in-One Guide for Exam Success!

The correct choice highlights that the option indicating support for both narrow and wide tables is not a feature of Alibaba Cloud's Cassandra database service. In the context of Cassandra database technology, the primary strength lies in its capability to handle wide tables, which are essential for storing large volumes of data in a distributed manner. This design allows for flexible schema functionality, enabling users to adapt their database structures based on their specific application needs.

While Cassandra is primarily known for wide tables, stating that it supports narrow tables may imply a limitation that does not align with its core architecture. The service excels at efficiently managing wide rows of data, which can expand horizontally as more data is added, thus enabling high performance even with significant data growth. Offering features like automatic scaling based on load, and multi-datacenter replication capabilities, further reinforce the system's capacity for handling distributed applications, ensuring reliability and responsiveness under varying load conditions.

Therefore, the emphasis on wide tables and the exclusion of narrow tables highlights the specific design and purpose of Alibaba Cloud's Cassandra service, making the assertion regarding support for both types incorrect.