What exactly is apache spark?
How Spark uses Akka?
Does rdd have schema?
Why is spark good?
When can you use ALTER KEYSPACE?
Define memtable?
If you run a select * query in hive, why does it not run mapreduce?
What is a scarce system resource?
What is difference between hadoop and spark?
Explain the different logging levels in cassandra.
What combiners are and when you should utilize a combiner in a map reduce job?
What is meant by spark in big data?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
What are benefits of DataFrame in Spark?
What are the basics of zookeeper api?