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 much Metadata will be created on NameNode in Hadoop?

What do you mean by metadata in Hadoop?

How to Delete directory and files recursively from HDFS?

How does HDFS Index Data blocks? Explain.

How to access HDFS?

Explain the process that overwrites the replication factors in HDFS?

Difference Between Hadoop and HDFS?

How would you import data from MYSQL into HDFS ?

Define HDFS and talk about their respective components?

What is the module in HDFS?

Tell me two most commonly used commands in HDFS?

What is a block in HDFS? what is the default size in Hadoop 1 and Hadoop 2? Can we change the block size?

HDFS is used for applications with large data sets, not why Many small files?

What is impala?

130

Why we need impala hadoop?

Un-Answered Questions { Big Data }

What is spark reducebykey?

261

Explain task granularity

600

What are the file formats supported by spark?

297

What is the difference between Hive CLI and Beeline?

796

State the difference between persist() and cache() functions.

308

Is kafka open source?

470

Who is a 'user' in HDFS?

855

Explain about postgresql storage handler?

Explain the functionality of object-inspector.

681

What is flume instagram?

Explain is it possible to search for files using wildcards?

440

Does spark use java?

311

What is an accumulator in spark?

286

A number of combiners can be changed or not in MapReduce?

615

List some use cases where classification machine learning algorithms can be used.

432

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