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?

122

Is there an update statement?

160

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 }

What are the basic available commands in Hadoop sqoop ?

910

Does the HDFS go wrong? If so, how?

How to set the number of mappers to be created in MapReduce?

601

When was spark introduced?

312

Can you explain rack awareness?

396

Can spark be used without hadoop?

253

What does impala do for fast access?

Can you explain edge nodes in hadoop?

401

What is an rdd?

288

Is it possible to provide multiple input to Hadoop? If yes then how?

463

Which command is available to show the current HBase user?

154

How one can format Hadoop HDFS?

What is the difference between the external table and managed table?

664

Explain what if rack 2 and datanode fails?

586

What is structured data?

593

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