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

Big Data Interview Questions

Questions Answers Views Company eMail

Why HDFS stores data using commodity hardware despite the higher chance of failures?

What are file permissions in HDFS and how HDFS check permissions for files or directory?

How data or file is written into HDFS?

What is throughput? How does HDFS get a good throughput?

What is the benifit of Distributed cache, why can we just have the file in HDFS and have the application read it?

List the various HDFS daemons in HDFS cluster?

What is the difference between NAS and HDFS?

If data is present in HDFS and RF is defined, then how can we change Replication Factor?

What do you mean by metadata in HDFS? Where is it stored in Hadoop?

100

What is the optimal block size in HDFS?

What do you mean by metadata in HDFS?

Data node block size in HDFS, why 64MB?

What happens if the block in HDFS is corrupted?

What is Fault Tolerance in HDFS?

What is the procedure to create users in HDFS and how to allocate Quota to them?

Un-Answered Questions { Big Data }

How can I delete the above index named index_bonuspay?

775

Explain about the basic parameters of mapper and reducer function

1111

How do you specify the table creator name when creating a table in hive?

730

What is data pipeline in spark?

307

what is distributed cache in mapreduce framework?

731

What is cluster in apache spark?

335

On which all platform can Apache Spark run?

282

What are the 2 modes used to run pig scripts?

651

What does /etc /init.d do?

740

Explain job scheduling through JobTracker

778

What is flatmap in angular?

345

What are the different ways of executing Pig script?

846

What is IdentityMapper?

1051

What is the difference between spark and apache spark?

341

What is executor spark?

315

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