I passed Cloudera Certified Hadoop Developer Exam last month. Though I have been working with Hadoop components since quite some time, I always get nervous about appearing for formal examinations. So clearing the exam in first attempt and with good score was quite a relief 🙂
After appearing for the exam, I have to stay it’s not one of those ones where you can cram though book or tutorials over night and pass next day. On the contrary, there is nearly every chance of not making through if you go by that approach. I felt exam to be quite a balanced one, one of the few very good ones, I have been through in recent past. It doesn’t ask silly syntax questions or often repeated and easily found details about Hadoop but rather tries to gauge one’s level of understanding about the framework, internal details about its functioning, different components and how do they fit together. Here are some of the tips, which might be helpful while preparing for the examination.
Cloudera Training Cloudera regularly organizes Instructor led classroom training for Apache Hadoop developer program. It’s a 4 day program and there are courses being conducted all over the world at pretty regular intervals. You can find the detailed agenda and training calendar here. I attended one such training in Amsterdam, the Netherlands and found it to be quite thorough and helpful during the preparation. Though, both are managed by Cloudera, training is in no way directly tailored to clear the exam. Both have different objectives and they do over-lap in many ways but going through the training material and exercises will no way guarantee you to clear the exam.
Exam Preparation Guide Cloudera provides a comprehensive guide of the exam in terms of areas covered and their percentage wise split on their web-site here. They also provide quite a few tutorials and links to docs which are all quite helpful.
Books A complete reading of Hadoop : The Definitive Guide by Tom White is a must for getting a very good grasp about Hadoop Internals and would go a long way in making you confident about exam preparations. Along with this, it would be great if you can also go through Hadoop in Action by Chuck Lam. Think of Hadoop : The Definitive Guide as a complete reference while Hadoop in Action is filled with lot of practical examples, quite helpful while using Hadoop in your day-to-day work.
Practice Programs It always helps to write Map/Reduce programs, use different Input/Output file formats, write Hive and Pig scripts essentially make your hands dirty with different components. You are free to download different components from Apache web-sites but can always use Cloudera Quick Start VM which takes away the pain of putting everything together.
- Though it’s a Cloudera managed certification program, there were no Cloudera Product specific questions like Cloudera Enterprise Manager/li>
- Cluster set-up, configuration and Administration are not part of the exam. Though it’s good to know for your understanding and work, but questions were not asked on those areas
- Actual exam delivery is managed by Pearson Vue, a completely Independent organization. They have authorised test centres across all major cities in the world. You will need to take an appointment with your local Pearson Vue center for appearing in the exam. Detailed instructions are available here.
- Exam vouchers normally have a time-bound validity, so do keep the last dates in mind and prepare accordingly.
I guess, that should be quite good not only from an exam perspective but also for your future Hadoop related work. Good Luck !
For those, who are interested to see how a Cloudera certificate looks like, here is a sample for your motivation 🙂