Sorry, I must have overlooked a notification. This is actually a question on our certification FAQ.
Q - Do I need to know both Scala and Python for the CCA Spark and Hadoop Developer (CCA 175) Certification?
A - The answer is yes, there are questions using both languages.
However, please remember that the goal of the exam is to test your Spark knowledge, not your Scala and Python knowledge. The development questions typically provide you some code and ask you to fill in TO-DO sections. So the key is to understand the Spark API. You must have some knowledge of programming, as you will need to be able to read the existing code and understand how to store and retrieve the results you get back from calling the API, but the focus will be on you adding the Spark calls.