Hadoop Interview Questions and Answers

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Q: Define the term Text Input Format in MapReduce?

asked Feb 17, 2023 in Hadoop by sharadyadav1986

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Q: Illustrate the differences between MapReduce and PIG?

asked Feb 17, 2023 in Hadoop by sharadyadav1986

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Q: What do you think will happen when a data node fails?

asked Feb 17, 2023 in Hadoop by sharadyadav1986

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Q: Explain what you understand by the term NameNode in Hadoop?

asked Feb 17, 2023 in Hadoop by sharadyadav1986

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Q: Illustrate the differences between a reducer and a combiner?

asked Feb 17, 2023 in Hadoop by sharadyadav1986

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Q: What do you know about Input Format?

asked Feb 17, 2023 in Hadoop by sharadyadav1986

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Q: Briefly list out the different configuration parameters that are required to perform the job of the MapReduce framework?

asked Feb 17, 2023 in Hadoop by sharadyadav1986

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Q: List out the main components of MapReduce?

asked Feb 17, 2023 in Hadoop by sharadyadav1986

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Q: Why is MapReduce used?

asked Feb 17, 2023 in Hadoop by sharadyadav1986

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Q: Explain job scheduling through JobTracker.

asked Feb 17, 2023 in Hadoop by sharadyadav1986

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Q: Illustrate the differences between HDFS block and InputSplit?

asked Feb 17, 2023 in Hadoop by sharadyadav1986

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Q: Briefly explain about Identity Mapper and Chain Mapper in MapReduce?

asked Feb 17, 2023 in Hadoop by sharadyadav1986

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Q: What do you know about MapReduce and how does it work?

asked Feb 17, 2023 in Hadoop by sharadyadav1986

+1 vote

Q: How many formats of SequenceFile are present in Hadoop I/O?

asked Jan 13, 2023 in Hadoop by john ganales

+1 vote

Q: Hadoop is distributed under .................

asked Jan 13, 2023 in Hadoop by john ganales

+1 vote

Q: The commercial applications of Hadoop include ...............

asked Jan 13, 2023 in Hadoop by john ganales

+1 vote

Q: The heartbeat signal are sent from ................

asked Jan 13, 2023 in Hadoop by john ganales

+2 votes

Q: Which of the following option is used for machine learning on Hadoop?

asked Jan 13, 2023 in Hadoop by john ganales

+1 vote

Q: Which of the following option allows users to read or write Avro data as Hive tables?

asked Jan 13, 2023 in Hadoop by john ganales

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Q: What is the shortcut for DUMP operator?

asked Jan 13, 2023 in Hadoop by john ganales

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Q: . ................. operator is used to view the map reduce execution plans.

asked Jan 13, 2023 in Hadoop by john ganales

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Q: Pig operates in mainly ......... nodes?

asked Jan 13, 2023 in Hadoop by john ganales

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Q: What is the common reason to restart hadoop process?

asked Jan 13, 2023 in Hadoop by john ganales

+1 vote

Q: Which of the following command is used to copy file or directories recursively?

asked Jan 13, 2023 in Hadoop by john ganales

+1 vote

Q: Which of the following hdfs command is used to check for various inconsistencies?

asked Jan 13, 2023 in Hadoop by john ganales

+2 votes

Q: Which of the following is the most popular NoSQL database for scalable big data store with Hadoop?

asked Jan 13, 2023 in Hadoop by john ganales

+1 vote

Q: Which of the following statement is incorrect about Hadoop?

asked Jan 13, 2023 in Hadoop by john ganales

+1 vote

Q: Which of the following command is used to check the status of all daemons running in the HDFS?

asked Jan 13, 2023 in Hadoop by john ganales

+1 vote

Q: Which of the following is the default size of distributed cache?

asked Jan 13, 2023 in Hadoop by john ganales

+1 vote

Q: Which of the configuration file is used to control the HDFS replication factor?

asked Jan 13, 2023 in Hadoop by john ganales

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