How to use combiner in hadoop ?
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Which database is used in hadoop?
How many maps are there in a particular job?
What is the difference between a hadoop database and relational database?
Clarify how job tracker schedules an assignment?
Mention what is rack awareness?
When and how to create hadoop archive?
How can you native libraries be included in yarn jobs?
Can you explain hadoop streaming?
Suppose hadoop spawned 100 tasks for a job and one of the tasks failed. What will hadoop do?
Which scala library is used for functional programming?
What is a namenode?
Have you ever used counters in hadoop?
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