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 }

What is the point of apache spark?

284

What does map transformation do? Provide an example.

316

What are Paired RDD?

315

Can we rename the output file?

685

How do I check my spark status?

276

What are the essential hooping tools that improve performance? Big data?

639

What are "coordinator nodes" in cassandra?

What are the various configuration parameters required to run a mapreduce job?

658

What is ObjectInspector functionality?

825

List the network requirements for using Hadoop ?

626

How to iterate all rows in ColumnFamily?

Is spark written in scala?

292

What are the network requirements for hadoop?

474

On what basis Namenode will decide which datanode to write on?

1264

Explain about Hadoop file system and processing framework?

424

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