Cognizant – Hadoop Interview Questions

Here is the list of Hadoop Interview Questions which are recently asked in Cognizant company. These questions are included for both Freshers and Experienced professionals.

  1. What Hadoop components will you use to design a Craiglist based architecture?
  2. Why cannot you use Java primitive data types in Hadoop MapReduce?
  3. Can HDFS blocks be broken?
  4. Does Hadoop replace data warehousing systems?
  5. How will you protect the data at rest?
    6. Free PDF : Get our updated Hadoop Course Content pdf
  6. Propose a design to develop a system that can handle ingestion of both periodic data and real-time data.
  7. A folder contains 10000 files with each file having size greater than 3GB.The files contain users, their names and date. How will you get the count of all the unique users from 10000 files using Hadoop?
  8. File could be replicated to 0 Nodes, instead of 1. Have you ever come across this message? What does it mean?
  9. How do reducers communicate with each other?
  10. How can you backup file system metadata in Hadoop?
  11. What do you understand by a straggler in the context of MapReduce
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TOP MNC's HADOOP INTERVIEW QUESTIONS & ANSWERS

Here we listed all Hadoop Interview Questions and Answers which are asked in Top MNCs. Periodically we update this page with recently asked Questions, please do visit our page often and be updated in Hadoop .