Big Data Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Big Data Interview Questions

Questions Answers Views Company eMail

How does a client read/write data in HDFS?

What is the difference between MapReduce engine and HDFS cluster?

100

Explain NameNode and DataNode in HDFS?

How data or file is read in HDFS?

How is indexing done in HDFS?

What alternate way does HDFS provides to recover data in case a Namenode, without backup, fails and cannot be recovered?

Why HDFS performs replication, although it results in data redundancy?

132

Why ‘Reading‘ is done in parallel and ‘Writing‘ is not in HDFS?

What are the key features of HDFS?

How can one set space quota in Hadoop (HDFS) directory?

Explain how HDFS communicates with Linux native file system?

If I create a folder in HDFS, will there be metadata created corresponding to the folder? If yes, what will be the size of metadata created for a directory?

Replication causes data redundancy then why is is pursued in HDFS?

What is a block in Hadoop HDFS? What should be the block size to get optimum performance from the Hadoop cluster?

What are the main hdfs-site.xml properties?

Un-Answered Questions { Big Data }

How do we create rdds in spark?

558

How do I start flume agent?

Input Split & Record Reader and what they do?

1037

Why is block size set to 128 MB in HDFS?

Where is hadoop-env.sh file present?

485

How do you organize the pig latin statements?

583

Is spark faster than hadoop?

356

Explain apache kafka?

522

What is ZooKeeper Atomic Broadcast (ZAB) protocol?

Define taskinstance?

512

Name the two types of shared variable available in Apache Spark?

305

What is zookeeper in hadoop?

651

Explain how you can improve the throughput of a remote consumer?

551

What are core components of Flume?

100

How does hdfs get a good throughput?

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