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 the syntax to create keyspace in Cassandra?

128

What is the role of CQLSH?

Define data centre?

120

Define composite key?

Can we change Replication Factor on a live cluster?

101

What is bloom filter?

Talk about the concept of tunable consistency in Cassandra.

148

Establish the difference between a node, cluster & data centres in Cassandra.

161

Explain Tombstone in Cassandra?

List the steps in which Cassandra writes changed data into commitlog?

251

Does Cassandra support ACID transactions?

107

What is the replica placement Strategy in Cassandra ?

What are the main features of SPM in Cassandra?

Can you add or remove Column Families in a working Cluster?

What is CQL?

Un-Answered Questions { Big Data }

What happens if number of reducers are 0?

517

Explain about trformations and actions in the context of rdds?

324

What is the difference between Reducer and Combiner in Hadoop MapReduce?

733

How many JVMs run on a slave node?

1096

If I create a folder in HDFS, will there be metadata created corresponding to the folder? If yes, what will be the size of metadata created for a directory?

What is shuffling and sorting in mapreduce?

697

What is Distributed Cache?

946

how you can reduce churn in ISR? When does broker leave the ISR?

670

What is the use of explode in Hive?

770

What are the types of tables in Hive?

783

How to keep files in HDFS?

How is big data analysis helpful in increasing business revenue?

572

Define primary key in Apache Cassandra?

Explain sortbykey() operation?

305

How can we see only top 15 records from the student.txt out of100 records in the HDFS directory?

622

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