Tech Mahindra Interview Questions
- What are the differences between Hadoop and Spark?
- What are the real-time industry applications of Hadoop?
- How is Hadoop different from other parallel computing systems?
- In what all modes Hadoop can be run?
- Explain the major difference between HDFS block and InputSplit.
- What is distributed cache? What are its benefits?
- Explain the difference between NameNode, Checkpoint NameNode, and Backup Node.
- What are the most common input formats in Hadoop?
- Define DataNode. How does NameNode tackle DataNode failures?
- What are the core methods of a Reducer?
- What is a SequenceFile in Hadoop?
- What is the role of a JobTracker in Hadoop?
- What is the use of RecordReader in Hadoop?
- What is Speculative Execution in Hadoop?
- How can you debug Hadoop code?
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