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 gossip protocol in Cassandra?

How Cassandra provide High availability feature?

What is NoSQL database?

When to use Cassandra?

124

Is there an update statement?

162

Does cloudera offer a vm for demonstrating impala?

How do I try impala out?

How does impala compare to hive and pig?

How does impala achieve its performance improvements?

Can I use impala to query data already loaded into hive and hbase?

What happens when the data set exceeds available memory?

How much memory is required?

Are results returned as they become available, or all at once when a query completes?

Why do I have to use refresh and invalidate metadata, what do they do?

Why does my select statement fail?

Un-Answered Questions { Big Data }

Does spark load all data in memory?

340

What is the concept of SuperColumn in Cassandra?

What is the purpose of sqoop-merge?

Is it possible to add 100 more nodes when we already have 100 nodes in Hive?

1261

What are the relational operators available related to combining and splitting in pig language?

711

What is pig properties?

549

Why does hive not store metadata information in hdfs?

Enlist the several components in Kafka?

653

What is a udf?

448

Explain Multi-tenancy?

555

What are the benefits of lazy evaluation?

303

What is ObjectInspector functionality?

825

What are the identity mapper and reducer in MapReduce?

781

What are the data components used by Hadoop?

738

What is speculative execution in spark?

322

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