Define a record reader?
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Compare Apache Hadoop and Apache Spark?
Which are the three modes in which hadoop can be run?
Can you define inputsplit in hadoop?
Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?
Explain is it possible to search for files using wildcards?
Is nosql follow relational db model?
Explain how jobtracker schedules a task?
What is the key difference between NameNode and DataNode in Hadoop?
What is the relationship between Jobs and Tasks in Hadoop?
If we want to copy 10 blocks from one machine to another, but another machine can copy only 8.5 blocks, can the blocks be broken at the time of replication?
What is fsck?
What are configuration files in Hadoop?
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