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

Big Data Interview Questions

Questions Answers Views Company eMail

Define NoSQL Database?

104

What Platforms Cassandra runs on?

Give some advantages of Cassandra?

What is the use of “void close()” method?

What are the collection data types provided by CQL?

What is the use of “ResultSet execute(Statement statement)” method?

What do you mean by consistency in Cassandra?

191

Give the data storage units in Cassandra?

What is data replication in Cassandra?

When can you use ALTER KEYSPACE?

What is the concept of SuperColumn in Cassandra?

How many types of tunable consistency are supported in Cassandra?

Mention what are the values stored in the Cassandra Column?

What do you understand by Consistency in Cassandra?

How many types of NoSQL databases are there?

146

Un-Answered Questions { Big Data }

How would you tackle counting words in several text documents?

1066

What is a IdentityMapper and IdentityReducer in MapReduce ?

1005

what does /*streamtable(table_name)*/ do?

818

What is LazyOutputFormat in MapReduce?

732

Can I run an ensemble cluster behind a load balancer?

Explain the use of .mecia class?

822

Where is Mapper output stored?

910

Who are ‘Data Scientists’?

462

Mention key components of Hive Architecture?

898

What are Apache Spark, Flume, Lucene, Hama, HCatalog, Mahout, Drill, Crunch and Thrift?

676

What happens to a namenode, when job tracker is down?

796

What is a reliable and unreliable receiver in Spark?

339

What are the features of RDD, that makes RDD an important abstraction of Spark?

301

Explain what is the role of the zookeeper?

536

What are the benefits of Spark lazy evaluation?

336

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