I believe it mostly depends on the company you work at, and the type of work you want to do. In Linkedin, the data scientist would look for expertise in one of those languages, along with Python, R, etc. A big part of data science on the product improvement side is essentially software engineering, and being able to create, modify and implement algorithms. If you are a beginner and want to know more about Python for Data Science and R programming language then do refer the following video tutorials:
You can get a hands-on project by referring to Data Scientist which will teach you Data Science from scratch to advance.
And if you are more into videos then do check out the following video tutorial which will help you in mastering in the field of Data Science:
If you want a detailed explanation of Data Science then do check out Data Science tutorial which will help you in understanding DS.
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