Which layer contains core programs to extract data stored on the Avaloq database?

The correct answer is the Kernel Layer, which is essential for extracting data from the Avaloq database. The Kernel Layer acts as the foundation of the Avaloq system, managing the fundamental operations, including data storage and retrieval. It interfaces directly with the database, executing critical functionalities that enable other components of the system to interact with the data efficiently.

In the context of Avaloq, understanding the role of the Kernel Layer is crucial because it ensures that data integrity, performance, and security are maintained during data operations. By handling direct queries and database interactions, the Kernel Layer provides the necessary mechanisms to fetch and manipulate data effectively, making it a vital component for data extraction tasks.

The other layers mentioned, such as the Application Layer, Data Access Layer, and Business Logic Layer, serve different purposes. The Application Layer typically deals with the user interface and presentation aspects, while the Data Access Layer focuses on abstracting database interactions but relies on the Kernel Layer for execution. The Business Logic Layer contains rules and processes that govern how data is utilized in business contexts but does not usually interact directly with the database for core data extraction tasks.