Hadoop interview questions part 50
Hadoop interview questions part 50
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Total Questions: 20
1. Which of the following performs compression using zlib ?
Correct Answer is : TZlibTransport
2. ________ is a multi-threaded server using standard blocking I/O.
Correct Answer is : TThreadPoolServer
3. _____________ transport writes to a file.
Correct Answer is : TFileTransport
4. __________ abstract class has three main methods for loading data and for most use cases it would suffice to extend it.
Correct Answer is : LoadFunc
5. Point out the correct statement :
Correct Answer is : LoadPush has methods to push operations from Pig runtime into loader implementations
6. Which of the following has methods to deal with metadata ?
Correct Answer is : LoadMetadata
7. ____________ method will be called by Pig both in the front end and back end to pass a unique signature to the Loader.
Correct Answer is : setUdfContextSignature()
8. Point out the wrong statement :
Correct Answer is : The meaning of getNext() has changed and is called by Pig runtime to get the last tuple in the data
9. ___________ return a list of hdfs files to ship to distributed cache.
Correct Answer is : getShipFiles()
10. The loader should use ______ method to communicate the load information to the underlying InputFormat.
Correct Answer is : setLocation()
11. ____________ method enables the RecordReader associated with the InputFormat provided by the LoadFunc is passed to the LoadFunc.
Correct Answer is : prepareToRead()
12. __________ method tells LoadFunc which fields are required in the Pig script.
Correct Answer is : pushProjection()
13. .A loader implementation should implement __________ if casts (implicit or explicit) from DataByteArray fields to other types need to be supported.
Correct Answer is : LoadCaster
14. ________ is the architectural center of Hadoop that allows multiple data processing engines.
Correct Answer is : YARN
15. Point out the correct statement :
Correct Answer is : All of the mentioned
16. YARN’s dynamic allocation of cluster resources improves utilization over more static _______ rules used in early versions of Hadoop.
Correct Answer is : MapReduce
17. The __________ is a framework-specific entity that negotiates resources from the ResourceManager
Correct Answer is : ApplicationMaster
18. Point out the wrong statement :
Correct Answer is : The ResourceManager is the per-machine slave, which is responsible for launching the applications’ containers
19. Apache Hadoop YARN stands for :
Correct Answer is : Yet Another Resource Negotiator
20. MapReduce has undergone a complete overhaul in hadoop :
Correct Answer is : 0.23
