Best Spark interview questions in github

Introduction

  • If you are looking for the best Spark interview questions in GitHub, we are here to help you with the same. Consider this blog post a one-stop solution for best Spark interview questions in GitHub for beginners as well as best Spark interview questions in GitHub for experienced.
  • Even if you are looking for the best Spark interview questions in GitHub 2022, you have landed on the right blog post.
  • As already mentioned above, in this post, we will be covering the best Spark interview questions in GitHub.

Best Spark Interview Questions in GitHub 2022

Let’s now dive right into the questions. Here are the questions:

Q.1. In which areas is Spark better than Hadoop as far as processing is concerned?

Ans. This is one of the best Spark interview questions in GitHub which you must prepare. Now, let’s talk about the answer. Sensor data processing, real-time querying of data, and stream processing are the areas in which Spark is better than Hadoop.

Q.2. What are the various types of RDD that you know of?

Ans. RDD is Resilient Distribution Datasets and their various types are parallelized collection and Hadoop datasets.

Q.3. How will you create RDDs in Spark?

Ans. Even if you are a fresher, while preparing for the best Spark interview questions in GitHub, you must prepare for this particular question. Here are the methods with the help of which you can create RDDs in Spark:

a)   By using your Driver program to parallelize a collection

b) By using an external storage system like HDFS, and HBase so that you can load an external dataset from the same.

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Q.4. What do you mean by YARN?

Ans. This is one of the best Spark interview questions in GitHub which you must answer correctly. Coming back to YARN, it is one of the most important features in Spark that provide a central and resource management platform. The importance of such a problem is that it helps provide scalable operations within the cluster.

Q.5. Is it necessary to install Spark on every node of the YARN cluster? Give reasons for your answer.

Ans. The answer is a simple, “No”, and the reason is that Spark runs in addition to YARN. Therefore, it is not necessary to install Spark on every node of the YARN cluster.

Q.6. What do you mean by a lineage graph?

Ans. When you are preparing for the best Spark interview questions in GitHub, you will have to come across this question as it is an important one. RDDS in Spark are dependent on other RDDs and such dependencies are represented with the help of a lineage graph.

Q.7. What do you mean by a catalyst framework?

Ans. Spark SQL has an optimization framework in it. Such an optimization framework is called a catalyst framework. It adds on new optimizations to help Spark transform SQL queries automatically. Doing this also helps in creating a quicker processing system.

Q.8. How does an Action in Spark help?

Ans. This is one of the best Spark interview questions in GitHub that have been asked by interviewers. Coming back to Action in Spark, an Action in Spark helps in extracting the data from RDD to the local machine. All the transformations that you have created earlier culminate to help in the execution of an action.

Q.9. Explain the various types of transformations on DStreams?

Ans. If you are looking for the best Spark Interview questions in GitHub, you can’t overlook this one. Here are the various types of transformations on DStreams:

a)   Stateless Transformations – Here, the processing of a batch does not determine the processing of the next batch. Examples are map ( ), reduceByKey ( ), etc.

b) Stateful Transformations – Here, the intermediary results of a batch determine the processing of the next batch. Examples are transformations depending on sliding windows.

Q.10. What is SchemaRDD?

Ans. This is not only one of the best Spark interview questions in GitHub but also one of the most important ones. SchemaRDD is composed of row objects that exist with the schema information of the type of data that each column has.

Closing

  • These are the best Spark interview questions in GitHub that you may encounter in an interview for the year 2022. You should not only brush your technical skills before the interview but also your interpersonal skills and leadership skills. These questions will prove to be the best Spark interview questions in GitHub for beginners as well as the best Spark interview questions in GitHub for experienced.

 

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