Explain use cases where SequenceFile class can be a good fit?

781

Explain the master class and the output class do?

472

What is the default block size in hdfs?

840

How does NameNode tackle DataNode failures?

981

What is a namenode? How many instances of namenode run on a hadoop cluster?

468

Where is the Mapper Output intermediate kay-value data stored ?

1175

How to exit the vi editor?

523

What is HDFS ? How it is different from traditional file systems?

762

What is small file problem in hadoop?

553

Is client the end user in HDFS?

833

Explain the core components of hadoop?

493

What is the difference between Apache Hadoop and RDBMS?

553

Explain the basic difference between traditional rdbms and hadoop?

496

What is the jobtracker and what it performs in a hadoop cluster?

481

What is the meaning of speculative execution in Hadoop? Why is it important?

890