Answer: %<language>

In Azure Databricks notebooks, the `%<language>` command (also known as magic commands) is used to switch between different programming languages within individual cells. This allows a single notebook to support multiple languages while maintaining the primary language specified when the notebook was created. **Why Option A is correct:** - The `%` prefix followed by the language name (e.g., `%scala`, `%sql`, `%r`, `%python`) is the standard syntax for language-specific magic commands in Databricks - This command tells the notebook interpreter to execute the current cell using the specified language, regardless of the notebook's default language - For example, in an R notebook, you can use `%scala` to run Scala code in a specific cell, or `%sql` to run SQL queries **Why other options are incorrect:** - **Option B (`@<Language >`):** The `@` symbol is not used for language switching in Databricks; it's sometimes used for annotations in specific languages but not for cell language specification - **Option C (`\\[<language >]`):** This syntax is not valid for language switching in Databricks notebooks - **Option D (`\\(<language >)`):** This syntax is not recognized by Databricks for changing cell languages This approach enables data engineers to leverage the strengths of different languages within a single notebook workflow, such as using R for statistical analysis, Scala for distributed data processing, and SQL for data querying, all while maintaining clean, organized code.

Author: LeetQuiz Editorial Team