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The Top Hadoop Interview Questions for Big Data Opportunities

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Got a job interview for a Hadoop position? Congrats! Preparing for the big day can feel overwhelming and nearly impossible, but the good news is you likely already know everything you need to. And if you prepare for the top Hadoop interview questions you’re likely to be asked, you’re even better off.

As one of the highest paying IT professions in the field, Hadoop is highly in demand and continuing to increase each passing year. That means the competition can be tough. You want to walk into an interview with your best foot forward, ready to answer any question you’re asked confidently.

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So, here are the things you should prepare to be asked by the hiring manager.

Describe the differences between Hadoop and Spark.

There are a few key aspects for both Hadoop and Spark that you need to understand when you walk into an interview. Knowing the criteria required for each, from dedicated storage to libraries, will be what sets you apart from other candidates.

This might be a basic question for you. But don’t forget that many hiring managers want to ensure you know the basics before anything else.

What are the five V’s of Big Data?

Here we are at the basics again. This is likely something you learned in school or through a previous position. Don’t forget to review the information once more before you walk into an interview.

And if you need a refresher, luckily, we’re here to help. The five V’s of Big Data are:

  • Volume
  • Velocity
  • Variety
  • Veracity
  • Value

How is Hadoop different from other parallel computing systems?

Now, we’re getting a little more technical. If you’re applying for this position, you should know that it’s a distributed file system that allows you to store data in the cloud.

But you’re going to want to highlight the benefits of Hadoop and why it’s chosen over other options. Think back on the reason companies implement Hadoop and what it provides them. That right, there lies the key answer to this question.

What should you do when NameNode is down?

You’ll likely come across several situational-style interview questions for this type of position. This is just one of them.

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It’s always best to use a situation you’ve dealt with that might be similar. What steps did you take? How did you solve the problem? What obstacles did you have to overcome?

Remember, they’re looking to understand how you react under stress and whether you can get the job done efficiently. It’s best to write out a few different situational examples ahead of your interview, so you’re ready to talk about any of them.

What is a heartbeat in HDFS?

You probably already know the answer to this. The fact that it’s “a signal used between a data node and a Name node,” but you want to make sure to explain it in-depth in your interview.

Think of it as a pop quiz, as well as an interview. With so many talented people competing for the position, they want to make sure you know what you’re talking about. So, be sure to prep for those tough Hadoop interview questions. Make yourself some flashcards and get ready to blow the hiring manager out of the water with your facts.

After all, this is your first step towards a huge career move. A little bit of prep never hurt anyone.

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Category iconResume & Interview Tag iconhadoop,  interview prep,  interview questions

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