WIXLIB

282 views 0RELATED TITLES 0100 Interview Questions onHadoop.pdf Uploaded by Sethu RamFull description SaveEmbedSharePrintHadoop TrainingInstitute inSome of theFrequently Asked250 HadoopInterviewApache HInterviewSURENDPh:9066891. What does commodity Hardware in Hadoop world mean? ( D )a) Very cheap hardwareb) IndustryIndustry standardstandard hardwarehardwarec) Discarded hardwared) Low specifications Industry grade hardware2. Which of the following are NOT big data problem(s)? ( D)a) Parsing 5 MB XML file every 5 minutesb) ProcessingProcessing IPL tweettweet sentimentsc) Processing online bank transactionsd) both (a) and (c)3. What does “Velocity” in Big Data mean? ( D)a) Speed of input data generationb) Speed ofof individualindividual machinemachine processorsprocessorsc) Speed of ONLY storing datad) Speed of storing and processing data4. The term Big Data first originated from: ( C )a) Stock Markets Domainb) Banking and FinanceFinance Domainc) Genomics and Astronomy Domaind) Social Media Domain

282 views 0RELATED TITLES 0100 Interview Questions onHadoop.pdf Uploaded by Sethu RamFull description SaveEmbedSharePrintHadoop TrainingInstitute inSome of theFrequently Asked250 HadoopInterviewApache HInterviewSURENDPh:906689b) ProcessingProcessing flightsflights sensorsensor datac) Web crawling appd) Trending topic analysis of tweets for last 15 minutes6. Which of the followfollowinging are example(s) of Real Time Big Data Processing( D)a) Complex Event Processing (CEP) platformsb) Stock marketmarket data analysisanalysisc) Bank fraud transactions detectiond) both (a) and (c)7. Sliding window operations typically fall in the category (C )of .a) OLTP Transactionsb) Big Data BatchBatch ProcessingProcessingc) Big Data Real Time Processingd) Small Batch Processing8. What is HBase used as? (A )a) Tool for Random and Fast Read/Write operations in Hadoopb) Faster ReadRead only queryquery engineengine in HadoopHadoopc) MapReduce alternative in Hadoopd) Fast MapReduce layer in Hadoop9. What is Hive used as? (D )

282 views 0RELATED TITLES 0100 Interview Questions onHadoop.pdf Uploaded by Sethu RamFull description SaveEmbedSharePrintHadoop TrainingInstitute inSome of theFrequently Asked250 HadoopInterviewApache HInterviewSURENDPh:906689d) All of the above10. Which of the following are NOT true for Hadoop? (D)a) It’s a tool for Big Data analysisb) It supports structured and unstructured data analysisc) It aims for vertical scaling out/in scenariosd) Both (a) and (c)11. Which of the following are the core components of Hadoop? ( D)a) HDFSb) Map Reducec) HBased) Both (a) and (b)12. Hadoop is open source. ( B)a) ALWAYS Trueb) True only for Apache Hadoopc) True only for Apache and Cloudera Hadoopd) ALWAYS False13. Hive can be used for real time queries. ( B )a) TRUEb) FALSEc) True if data set is small

282 views 0 0RELATED TITLES100 Interview Questions onHadoop.pdf Uploaded by Sethu RamFull description SaveEmbedSharePrintHadoop TrainingInstitute inSome of theFrequently Asked250 HadoopInterviewApache HInterviewSURENDPh:906689b) 64 KBc) 128 KBd) 64 MB15. What is the default HDFS replication factor? ( C)a) 4b) 1c) 3d) 216. Which of the following is NOT a type of metadata in NameNode? ( C)a) List of filesb) Block locations of filesc) No. of file recordsd) File access control information17. Which of the following is/are correct? (D )a) NameNode is the SPOF in Hadoop 1.xb) NameNode is the SPOF in Hadoop 2.xc) NameNode keeps the image of the file system alsod) Both (a) and (c)18. The mechanism used to create replica in HDFS is . ( C)a) Gossip protocol

282 views 0 0RELATED TITLES100 Interview Questions onHadoop.pdf Uploaded by Sethu RamFull description SaveEmbedSharePrintHadoop TrainingInstitute inSome of theFrequently Asked250 HadoopInterviewApache HInterviewSURENDPh:90668919. NameNode tries to keep the first copy of data nearest to the client machin( C)a) ALWAYS trueb) ALWAYS Falsec) True if the client machine is the part of the clusterd) True if the client machine is not the part of the cluster20. HDFS data blocks can be read in parallel. ( A )a) TRUEb) FALSE21. Where is HDFS replication factor controlled? ( D)a) mapred-site.xmlb) yarn-site.xmlc) core-site.xmld) hdfs-site.xml22. Read the statement and select the correct option: ( B)It is necessary to default all the properties in Hadoop config files.a) Trueb) False23. Which of the following Hadoop config files is used to define the heap siz(C )a) hdfs-site.xml

282 views 0 0RELATED TITLES100 Interview Questions onHadoop.pdf Uploaded by Sethu RamFull description SaveEmbedSharePrintHadoop TrainingInstitute inSome of theFrequently Asked250 HadoopInterviewApache HInterviewSURENDPh:90668924. Which of the following is not a valid Hadoop config file? ( B)a) mapred-site.xmlb) hadoop-site.xmlc) core-site.xmld) Masters25. Read the statement:NameNodes are usually high storage machines in the clusters. ( B)a) Trueb) Falsec) Depends on cluster sized) True if co-located with Job tracker26. From the options listed below, select the suitable data sources for flume.a) Publicly open web sitesb) Local data foldersc) Remote web serversd) Both (a) and (c)27. Read the statement and select the correct options: ( A)distcp command ALWAYS needs fully qualified hdfs paths.a) Trueb) False

282 views 0 0RELATED TITLES100 Interview Questions onHadoop.pdf Uploaded by Sethu RamFull description SaveEmbedSharePrintHadoop TrainingInstitute inSome of theFrequently Asked250 HadoopInterviewApache HInterviewSURENDPh:906689a) It invokes MapReduce in backgroundb) It invokes MapReduce if source and destination are in same clusterc) It can’t copy data from local folder to hdfs folderd) You can’t overwrite the files through distcp command29. Which of the following is NOT the component of Flume? (B)a) Sinkb) Databasec) Sourced) Channel30. Which of the following is the correct sequence of MapReduce flow? ( C31 .Which of the following can be used to control the number of part files ( Bin a map reduce program output directory?a) Number of Mappersb) Number of Reducersc) Counterd) Partitioner32. Which of the following operations can’t use Reducer as combiner also? (

282 views 0 0RELATED TITLES100 Interview Questions onHadoop.pdf Uploaded by Sethu RamFull description SaveEmbedSharePrintHadoop TrainingInstitute inSome of theFrequently Asked250 HadoopInterviewApache HInterviewSURENDPh:906689c) Group by Countd) Group by Average33. Which of the following is/are true about combiners? (D)a) Combiners can be used for mapper only jobb) Combiners can be used for any Map Reduce operationc) Mappers can be used as a combiner classd) Combiners are primarily aimed to improve Map Reduce performancee) Combiners can’t be applied for associative operations34. Reduce side join is useful for (A)a) Very large datasetsb) Very small data setsc) One small and other big data setsd) One big and other small datasets35. Distributed Cache can be used in (D)a) Mapper phase onlyb) Reducer phase onlyc) In either phase, but not on both sides simultaneouslyd) In either phase36. Counters persist the data on hard disk. (B)a) True

282 views 0 0RELATED TITLES100 Interview Questions onHadoop.pdf Uploaded by Sethu RamFull description SaveEmbedSharePrintHadoop TrainingInstitute inSome of theFrequently Asked250 HadoopInterviewApache HInterviewSURENDPh:906689b) 250 MBc) 100 MBd) 35 MB38. Number of mappers is decided by the (D)a) Mappers specified by the programmerb) Available Mapper slotsc) Available heap memoryd) Input Splitse) Input Format39. Which of the following type of joins can be performed in Reduce side joioperation? (E)a) Equi Joinb) Left Outer Joinc) Right Outer Joind) Full Outer Joine) All of the above40. What should be an upper limit for counters of a Map Reduce job? (D)a) 5sb) 15c) 150d) 50

282 views 0 0RELATED TITLES100 Interview Questions onHadoop.pdf Uploaded by Sethu RamFull description SaveEmbedSharePrintHadoop TrainingInstitute inSome of theFrequently Asked250 HadoopInterviewApache HInterviewSURENDPh:906689b) InputSplitc) RecordReaderd) Mapper42. Which of the following writables can be used to know value from amapper/reducer? (C)a) Textb) IntWritablec) Nullwritabled) String43. Distributed cache files can’t be accessed in Reducer. (B)a) Trueb) False44. Only one distributed cache file can be used in a Map Reduce job. (B)a) Trueb) False45. A Map reduce job can be written in: (D)a) Javab) Rubyc) Pythond) Any Language which can read from input stream46. Pig is a: (B)

282 views 0RELATED TITLES 0100 Interview Questions onHadoop.pdf Uploaded by Sethu RamFull description SaveEmbedSharePrintHadoop TrainingInstitute inSome of theFrequently Asked250 HadoopInterviewApache HInterviewSURENDPh:906689c) Query Languaged) Database47. Pig is good for: (E)a) Data Factory operationsb) Data Warehouse operationsc) Implementing complex SQLsd) Creating multiple datasets from a single large datasete) Both (a) and (d)48. Pig can be used for real-time data updates. (B)a) Trueb) False49. Pig jobs have the same run time as the native Map Reduce jobs. (B)a) Trueb) False50. Which of the following is the correct representation to access ‘’Skill” frothe (A)Bag {‘Skills’,55, (‘Skill’, ‘Speed’), {2, (‘San’, ‘Mateo’)}}a) 3. 1b) 3. 0c) 2. 0d) 2. 1

282 views 0 0RELATED TITLES100 Interview Questions onHadoop.pdf Uploaded by Sethu RamFull description SaveEmbedSharePrintHadoop TrainingInstitute inSome of theFrequently Asked250 HadoopInterviewApache HInterviewSURENDPh:906689b) False52. Maximum size allowed for small dataset in replicated join is: (C)a) 10KBb) 10 MBc) 100 MBd) 500 MB53. Parameters could be passed to Pig scripts from: (E)a) Parent Pig Scriptsb) Shell Scriptc) Command Lined) Configuration Filee) All the above except (a)54. The schema of a relation can be examined through: (B)a) ILLUSTRATEb) DESCRIBEc) DUMPd) EXPLAIN55. DUMP Statement writes the output in a file. (B)a) Trueb) False

282 views 0 0RELATED TITLES100 Interview Questions onHadoop.pdf Uploaded by Sethu RamFull description SaveEmbedSharePrintHadoop TrainingInstitute inSome of theFrequently Asked250 HadoopInterviewApache HInterviewSURENDPh:906689c) Both (a) and (b)d) None of the above57. Which of the following constructs are valid Pig Control Structures? (D)a) If-elseb) For Loopc) Until Loopd) None of the above58. Which of following is the return data type of Filter UDF? (C)a) Stringb) Integerc) Booleand) None of the above59. UDFs can be applied only in FOREACH statements in Pig. (A)a) Trueb) False60. Which of the following are not possible in Hive? (E)a) Creating Tablesb) Creating Indexesc) Creating Synonymd) Writing Update Statements

282 views 0RELATED TITLES 0100 Interview Questions onHadoop.pdf Uploaded by Sethu RamFull description SaveEmbedSharePrintHadoop TrainingInstitute inSome of theFrequently Asked250 HadoopInterviewApache HInterviewSURENDPh:906689b) Job trackerc) Combinerd) Reducer62. Categorize the following to the following datatypea) JSON files – Semi-structuredb) Word Docs , PDF Files , Text files – Unstructuredc) Email body – Unstructuredd) Data from enterprise systems (DB, CRM) – Structured63. Which of the following are the Big Data Solutions Candidates? (E)a) Processing 1.5 TB data everydayb) Processing 30 minutes Flight sensor datac) Interconnecting 50K data points (approx. 1 MB input file)d) Processing User clicks on a websitee) All of the above64. Hadoop is a framework that allows the distributed processing of: (C)a) Small Data Setsb) Semi-Large Data Setsc) Large Data Setsd) Large and Small Data sets65. Where does Sqoop ingest data from? (B) & (D)