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 }

Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?

456

Mention key components of Hive Architecture?

853

Describe the distnct(),union(),intersection() and substract() transformation in Apache Spark RDD?

303

How jobtracker assign tasks to the tasktracker?

413

How to compress mapper output in Hadoop?

677

Explain what is a task tracker in hadoop?

456

What is the difference between apache mahout and cloudera oryx ?

Compare hive, hbase, and impala?

Define data integrity?

Can you explain broadcast variables?

295

Define cell in HBase?

166

What are the basic commands in Apache Sqoop and its uses?

What is a nosql database?

What is different table structure available in the hive?

659

What are Replication Tool and its types?

567

For More Un-Answered { Big Data } Questions Click Here