Hadoop interview questions part 28
Hadoop interview questions part 28
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Total Questions: 20
1. ___________ part of the MapReduce is responsible for processing one or more chunks of data and producing the output results.
Correct Answer is : Maptask
2. _________ function is responsible for consolidating the results produced by each of the Map() functions/tasks.
Correct Answer is : Reduce
3. Point out the wrong statement :
Correct Answer is : None of the mentioned
4. Although the Hadoop framework is implemented in Java , MapReduce applications need not be written in :
Correct Answer is : Java
5. ________ is a utility which allows users to create and run jobs with any executables as the mapper and/or the reducer.
Correct Answer is : Hadoop Streaming
6. __________ maps input key/value pairs to a set of intermediate key/value pairs.
Correct Answer is : Mapper
7. The number of maps is usually driven by the total size of :
Correct Answer is : inputs
8. _________ is the default Partitioner for partitioning key space.
Correct Answer is : HashPartitioner
9. Pig operates in mainly how many nodes ?
Correct Answer is : Two
10. Point out the correct statement :
Correct Answer is : You can run Pig in either mode using the “pig” command
11. You can run Pig in batch mode using __________ .
Correct Answer is : Pig scripts
12. Pig Latin statements are generally organized in one of the following ways :
Correct Answer is : All of the mentioned
13. Point out the wrong statement :
Correct Answer is : The DISPLAY operator will display the results to your terminal screen
14. Which of the following function is used to read data in PIG ?
Correct Answer is : LOAD
15. You can run Pig in interactive mode using the ______ shell.
Correct Answer is : Grunt
16. Which of the following is the default mode ?
Correct Answer is : Mapreduce
17. Which of the following will run pig in local mode ?
Correct Answer is : $ pig -x local …
18. .$ pig -x tez_local … will enable ________ mode in Pig.
Correct Answer is : None of the mentioned
19. BigDecimal is comprised of a ________ with an integer ‘scale’ field.
Correct Answer is : BigInteger
20. Point out the correct statement :
Correct Answer is : BlobRef is a wrapper that holds a BLOB either directly
