Which statements about filtering data are correct? Choose two.

Filtering data effectively is crucial for optimizing performance and resource usage. One correct statement regarding filtering data is that it is more efficient to filter on the database rather than in memory. When filtering occurs in the database, only the necessary data is retrieved, reducing the amount of data that needs to be processed in the application layer. This results in lower memory usage and faster execution times since the application does not have to handle and iterate over a larger dataset.

Another accurate statement is that filtering should aim to return only the data needed for the current action. This practice minimizes data transfer and processing load, thus enhancing the efficiency of the application. When developers implement this, they ensure that the application operates with only the relevant data for its immediate needs, which leads to an efficient and responsive system.

The other options are less optimal; simply returning all data from the database or relying solely on external services for filtering can lead to performance bottlenecks. Therefore, focusing on filtering at the database level and ensuring only relevant data is processed aligns best with best practices in data management.