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?

921

What is Partioner in hadoop? Where does it run

973

Does Hadoop requires RAID?

944

What is the purpose of DataNode block scanner?

961

What is a checkpoint?

966

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

1218

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?

905

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 }

What is the Hadoop MapReduce API contract for a key and value Class?

1290

If no custom partitioner is defined in Hadoop then how is data partitioned before it is sent to the reducer?

451

What can be optimum value for Reducer?

945

Say what the views are in hive?

672

What is a column family in Cassandra?

Mention some important components of cassandra data models?

How rdd persist the data?

293

How can we create table by using command?

What are the different types of data model?

What combiners are and when you should utilize a combiner in a map reduce job?

602

What happen when namenode enters in safemode in hadoop?

429

Define a combiner?

646

Explain Apache Ambari?

How is indexing done in Hadoop HDFS?

In mapreduce what is a scarce system resource? Explain?

667

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