Probably you have a lot of information about what to study and not to study for a Data Science job. But, when you start applying to a DS job, then you will realize that the whole process contains a lot of diverse rounds which includes 1. Problem Solving 2. Statistics 3. Aptitude 4. Guesstimate 5. Python and R 6. SQL and Excel 7. Project Description
This book contains more than 300 questions covering all the essential topics. You will get the complete idea of the recruitment drive