I was struggling to get good knowledge about the big data world as the hype was a lot on the internet and tools were very diverse. I was not sure where to start and what is required for me. Hadoop and Spark course at Dataflair helped me to get a very good understanding of this and I recommend this course for anyone who needs a very detailed knowledge of big data. Everything that was taught in the class was clear and understandable. The study material was very helpful and the contents were well documented. Exercises were very clear. The trainer was well experienced in the subject he was talking about and is able to explain all queries.