Give me the examples of Columnar database ?
What is Rack Awareness? What is its need in Hadoop?
What is Small File Problem in Hadoop? How can it be resolved?
Why is Data Block size set to 128 MB in Hadoop?
What are the main components in Hadoop Eco-System and what are their functions ?
What is the difference between TextInputFormat and KeyValueInputFormat class?
What is job tracker in Hadoop?
What is the use of cloudera?
How job tracker schedules an assignment?
What is the block size in Hadoop?
How does speculative execution work in Hadoop?
Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?
What kind of hardware is best for hadoop?
What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?
What type of data we should put in distributed cache? When to put the data in dc? How much volume we should put in?