Final answer:
To create a Jupyter notebook in Watson Studio, it is required to have a project set up and an object storage service connected to it. No specific file, Spark instance, Scala, or URL is necessary before the creation.
Step-by-step explanation:
Before you create a Jupyter notebook in Watson Studio, you need to have a project created and an object storage service associated with it. You do not need a specific file, Spark instance, or URL, and Scala is a language option for the notebook but not a requirement for creating one.