What is a combiner in hadoop?
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Can you define a checkpoint?
Explain the core methods of the reducer?
What do you know about the speculative execution?
What is the use of recordreader in hadoop?
How is security achieved in Hadoop?
What are the four modules that make up the Apache Hadoop framework?
Whats the default port that jobtrackers listens ?
Why slaves limited to 4000 in hadoop version 1?
How many datanodes can run on a single Hadoop cluster?
What is the difference between a hadoop database and relational database?
What are the port numbers of job tracker?
When we send a data to a node, do we allow settling in time, before sending another data to that node?
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