What are the important modes of hadoop?
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Can hadoop replace relational database?
How many maps are there in a particular job?
What type of data hadoop can handle ?
Have you ever used counters in hadoop?
What are the four modules that make up the Apache Hadoop framework?
Are job tracker and task trackers present in separate machines?
Can you explain combiner?
Is it possible to provide multiple input to Hadoop? If yes then how?
Give me the examples of Columnar database ?
Define a udf?
What is rack awareness in hadoop?
What are the tools used in big data?
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