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 one can change Replication factor when Data is already stored in HDFS

Explain HDFS “Write once Read many” pattern?

Why is block size set to 128 MB in HDFS?

What should be the HDFS Block size to get maximum performance from Hadoop cluster?

What is the importance of dfs.namenode.name.dir in HDFS?

How one can format Hadoop HDFS?

Explain what happens if, during the PUT operation, HDFS block is assigned a replication factor 1 instead of the default value 3?

How to format the HDFS? How frequently it will be done?

Which one is the master node in HDFS? Can it be commodity hardware?

What happens if the block on Hadoop HDFS is corrupted?

What is a block in HDFS, why block size 64MB?

How NameNode tackle Datanode failures in HDFS?

How is indexing done in Hadoop HDFS?

How to perform the inter-cluster data copying work in HDFS?

What are the main properties of hdfs-site.xml file?

Un-Answered Questions { Big Data }

What is the relationship between Jobs and Tasks in Hadoop?

666

Explain about the execution plans of a Pig Script? Or Differentiate between the logical and physical plan of an Apache Pig script?

652

How are large objects handled in Sqoop?

What is sparkconf spark?

310

What is HBaseFsck class?

265

Define role of velocity in big data?

663

How to use Avro?

what is SStable consist of?

106

Explain the difference between COUNT_STAR and COUNT functions in Apache Pig?

822

What is Streaming / Log Data?

Who invented spark?

423

What is kafka topic?

587

How do I get better performance with spark?

309

What is the need of MapReduce?

698

What are the advantages of using map side join in mapreduce?

705

For More Un-Answered { Big Data } Questions Click Here