What is a Record Reader in hadoop?
Define tasktracker.
what is the default replication factor in HDFS?
If a data Node is full how it's identified?
How to use Apache Zookeeper command line interface?
What is Apache Hadoop?
Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
What is commodity hardware?
What is a speculative execution in Apache Hadoop MapReduce?
What is the purpose of RawComparator interface?
In which location Name Node stores its Metadata and why?
What is the sequencefileinputformat in hadoop?
What do you understand from Node redundancy and is it exist in hadoop cluster?