11: Spark on Zeppelin – Dataframe groupBy, collect_list, explode & window

Thanks for your support in extending the membership. I am able to clear the tech interviews and started new job with a bank. I can definitely say that Java success played a major role in my success. -- Balakrishna D

I am Naidu, I have 4 years of experience in java/Java EE. Few months back i started attending interviews and brought you book "Core Java Career essentials" and gone through most of the questions. I have cracked more than 10 companies and now i have joined Product based company. I felt very happy and thought of writing a mail to you and you help in the form of blog and book. -- Naidu M

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