What are the features of RDD, that makes RDD an important abstraction of Spark?

282

How to identify that given operation is transformation/action in your program?

282

What does the mapred.job.tracker command do?

434

What is the functionality of Query Processor in Apached Hive ?

713

Explain distnct(),union(),intersection() and substract() transformation in Spark?

328

What are “Seed Nodes” in Cassandra?

300

How can you start the kafka server?

580

How to add the partition in existing table without the partition table?

704

How does groupbykey work in spark?

301

What are the similarities and differences between Apache Flume and Apache Kafka?

107

What is Grunt shell?

587

Why do I have to use refresh and invalidate metadata, what do they do?

60

Why is jconsole used? What is it’s different elements?

73

When a large data set is maintained?

727

Elaborate on Identifiers?

122