20 TOP Hadoop Multiple Choice Questions and Answers

List of top 20 most frequently asked Hadoop multiple choice questions and answers pdf download free

Hadoop Multiple Choice Questions and Answers List

  1. What is a SequenceFile?
  2. Is there a map input format?
  3. In a MapReduce job, you want each of you input files processed by a single map task. How do you configure a MapReduce job so that a single map task processes each input file regardless of how many blocks the input file occupies?
  4. Which of the following best describes the workings of TextInputFormat?
  5. Which of the following statements most accurately describes the relationship between MapReduce and Pig?
  6. You need to import a portion of a relational database every day as files to HDFS, and generate Java classes to Interact with your imported data. Which of the following tools should you use to accomplish this?
  7. You have an employee who is a Date Analyst and is very comfortable with SQL. He would like to run ad-hoc analysis on data in your HDFS duster. Which of the following is a data warehousing software built on top of Apache Hadoop that defines a simple SQL-like query language well-suited for this kind of user?
  8. Workflows expressed in Oozie can contain:
  9. You need a distributed, scalable, data Store that allows you random, realtime read/write access to hundreds of terabytes of data. Which of the following would you use?
  10. Which of the following utilities allows you to create and run MapReduce jobs with any executable or script as the mapper and/or the reducer?
  11. You are running a Hadoop cluster with all monitoring facilities properly configured. Which scenario will go undetected.?
  12. Which of the following scenarios makes HDFS unavailable?
  13. Which MapReduce stage serves as a barrier, where all previous stages must be completed before it may proceed?
  14. Which of the following statements most accurately describes the general approach to error recovery when using MapReduce?
  15. The Combine stage, if present, must perform the same aggregation operation as Reduce.
  16. What is the implementation language of the Hadoop MapReduce framework?
  17. Which of the following MapReduce execution frameworks focus on execution in sharedmemory environments?
  18. How can a distributed filesystem such as HDFS provide opportunities for optimization of a MapReduce operation?
  19. What is the input to the Reduce function?
  20. Which MapReduce phase is theoretically able to utilize features of the underlying file system in order to optimize parallel execution?

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