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?

1099

What is the difference between Hadoop and Traditional RDBMS?

964

What is Partioner in hadoop? Where does it run

1028

Does Hadoop requires RAID?

998

What is the purpose of DataNode block scanner?

1017

What is a checkpoint?

1013

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

1281

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

1773

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

373

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

1220

What is the Job interface in MapReduce framework?

963

What is the problem with HDFS and streaming data like logs

1072

What is the Use of SSH in Hadoop ?

1000

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

1052

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

1119

Un-Answered Questions { Big Data }

How will you calculate the number of executors required to do real-time processing using Apache Spark? What factors need to be considered for deciding on the number of nodes for real-time processing?

319

What is spark job?

361

Can we run spark on windows?

293

Explain Spark coalesce() operation?

310

What does hadoop-env.sh do?

490

Does HBase support SQL like syntax?

157

Is there any difference between HBase datamodel and RDBMS datamodel?

1094

Is it possible to provide multiple input to Hadoop? If yes then how can you give multiple directories as input to the Hadoop job?

478

Name some Complex types of Data types, Avro Supports?

What is dag spark?

345

What is jmx? And how is it useful in cassandra?

How tables are managed in apache tajo?

How does Cassandra delete data?

What file systems Spark support?

371

What is sharding in big data?

542

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