Hello sunnyj
The correct answer is B) At least one notebook library to be executed. This is because a Delta Live Tables pipeline requires at least one notebook to be assigned with it and that contains a table definition using @Dlt.table (or the sql syntax one). Without this, the pipeline cannot start (or cannot be created), and it will fail with a NO_TABLES_IN_PIPELINE error:
"Pipelines are expected to have at least one table defined but no tables were found in your pipeline. Please verify that you have included the expected source files, and that your source code includes table definitions (e.g., CREATE MATERIALIZED VIEW in SQL code, @Dlt.table in Python code). Note that only tables are counted towards this check. You may also encounter this error if you only include views or flows in your pipeline." (from the error log)
Hope this clears things up! Let me know if you have any other questions. Best, Ilir
