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

Big Data Interview Questions

Questions Answers Views Company eMail

What is crontab? Explain with suitable example?

1057

What is the difference between Hadoop and Traditional RDBMS?

922

What is Partioner in hadoop? Where does it run

975

Does Hadoop requires RAID?

945

What is the purpose of DataNode block scanner?

964

What is a checkpoint?

966

Did you ever ran into a lop sided job that resulted in out of memory error

1220

What is the communication channel between client and namenode/datanode?

1734

What are the different operational commands in HBase at record level and table level?

361

What is the difference between Gen1 and Gen2 Hadoop with regards to the Namenode?

1172

What is the Job interface in MapReduce framework?

907

What is the problem with HDFS and streaming data like logs

1022

What is the Use of SSH in Hadoop ?

959

What infrastructure do we need to process 100 TB data using Hadoop?

1004

What is the difference between a Hadoop and Relational Database and Nosql?

1076

Un-Answered Questions { Big Data }

Can you explain the benefits of big data?

594

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

319

How to set the number of mappers for a MapReduce job?

687

Does HDFS allow a client to read a file which is already opened for writing in hadoop?

Clarify the difference between nas and hdfs.

How many Reducers run for a MapReduce job?

689

Mention what does the text input format do?

414

What is SSTable?

What are barriers?

Why should we use ‘orderby’ keyword in pig scripts?

528

Explain about postgresql storage handler?

What is the role of a zookeeper in a kafka cluster?

542

What is in memory in spark?

282

Mention what is rack awareness?

381

Explain the memtable in cassandra?

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