Which statement is true regarding NoSQL databases?

The statement regarding NoSQL databases that is true is that they can process large amounts of data with high availability. This is a significant advantage of NoSQL systems, as they are designed to scale out horizontally. This means that, instead of relying on a single server to manage database requests, NoSQL databases can distribute the load across multiple servers or nodes.

This distributed architecture allows for handling large datasets while maintaining high availability since if one server goes down, others can continue to provide access to the data. NoSQL databases often utilize eventual consistency rather than strict ACID compliance, which enables them to handle more extensive and varied data types, making them suitable for big data applications and real-time web applications.

In contrast, the other statements do not accurately describe NoSQL databases. Transactions requiring strict ACID compliance typically align more with traditional relational databases rather than NoSQL. Additionally, NoSQL databases are designed to be flexible and do not require a fixed schema before data insertion, allowing for varying data formats. Finally, NoSQL databases are capable of efficiently managing not just small datasets but also large volumes of data, which aligns with the need for flexibility and scalability in modern applications.