What is difference between Column and Super Column?
Define “speculative execution” in hadoop?
What is commodity hardware?
CONCAT function in Hive with Example?
What do you understand by High availability?
What will apache driver do?
What does secondary name-node means?
Where is spark used?
What are spark stages?
Explain about the popular use cases of Apache Spark
What is the difference between a hadoop database and relational database?
Tell any two feature Flume?
Specify Cassandra’s importance on Facebook?
How to start a kafka server?
Explain Zookeeper Leader election?