UnitedHealth Group interview questions and answers

361 Articles

361

What are the different configuration files in Hadoop ?

July 12, 2021

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July 12, 2021

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Answer : hadoop-env.sh,core-site.xml,hdfs-site.xml…

Big Data

Editor

What are the different types of file permissions in HDFS ?

July 12, 2021

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July 12, 2021

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Answer : Hadoop distributed file system (HDFS) uses a specific permissions…

Big Data

Editor

Difference between nfs and hdfs ?

July 12, 2021

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July 12, 2021

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Answer : NFS (Network File System) is one of the oldest and popular…

Big Data

Editor

Why do we need Data Locality in Hadoop ?

July 12, 2021

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July 12, 2021

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Answer : Datasets in HDFS store as blocks in DataNodes…

Big Data

Editor

What are the running modes of Hadoop ?

July 12, 2021

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July 12, 2021

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Answer : The three running modes of Hadoop are as follows…

Big Data

Editor

What are the configuration parameters in a “MapReduce” program ?

July 12, 2021

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July 12, 2021

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Answer : Input location of Jobs in the distributed file system…

Big Data

Editor

What are the core components of Hadoop ?

July 12, 2021

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July 12, 2021

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Answer : Hadoop is an open source framework that is meant…

Big Data

Editor

What are the features of Hadoop ?

July 12, 2021

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July 12, 2021

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Answer : Hadoop supports the storage and processing of big data…

Big Data

Editor

What is the difference between Hadoop and RDBMS ?

July 12, 2021

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July 12, 2021

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Answer : Hadoop Based on ‘Schema on Read’…

Big Data

Editor

How to recover a NameNode when it is down ?

July 12, 2021

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July 12, 2021

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Answer : Use the FsImage which is file system metadata…

Big Data

Editor

What are the Six V’s of Big Data ?

July 12, 2021

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July 12, 2021

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Answer : Volume represents the volume i.e. amount of data that is growing…

Big Data

Editor

What is fsck ?

July 12, 2021

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July 12, 2021

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Answer : Fsck stands for File System Check. This command is used…

Hadoop

Editor

Why Hadoop used for Big Data Analytics ?

July 12, 2021

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July 12, 2021

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Answer : Big data analytics is the process of examining large data…

Big Data

Editor

What are the components of HDFS and YARN ?

July 12, 2021

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July 12, 2021

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Answer : NameNode is the master node for processing metadata information…

Big Data

Editor

What are the steps to deploy a big data solution ?

July 12, 2021

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July 12, 2021

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Answer : There are three steps to deploy a Big Data …

Big Data

Editor

How big data analysis helpful in increasing business revenue ?

July 12, 2021

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July 12, 2021

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Answer : Big data analysis has become very important for the businesses…

Big Data

Editor

What is Big Data ?

July 12, 2021

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July 12, 2021

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Answer : Big Data is a term associated with complex…

Big Data

Editor

What is Shark ?

July 12, 2021

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July 12, 2021

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Answer : Shark is a tool, developed for people who are from…

Apache Spark

Editor

What is the difference between Spark and Hadoop MapReduce ?

July 12, 2021

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July 12, 2021

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Answer : Apache Spark is an open-source distributed cluster-computing…

Apache Spark

Editor

What is RDD ?

July 12, 2021

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July 12, 2021

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Answer : Resilient Distributed Datasets (RDD) is a fundamental data structure…

Apache Spark

Editor

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UnitedHealth Group interview questions and answers

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