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LinkedIn skill assessment answers and questions — Hadoop

घर/ LinkedIn skill assessment answers and questions — Hadoop

LinkedIn skill assessment answers and questions — Hadoop

फ़रवरी 16, 2024 लिंक्डइन , अभ्यास क्यू&ए 0 टिप्पणियाँ 49 विचारों

Hadoop is a popular framework for processing large-scale data sets using distributed computing. Many companies use Hadoop to store, manage and analyze their data, and they need skilled professionals who can work with this technology. If you want to prove your Hadoop skills and get certified by लिंक्डइन, आपको पास करने की आवश्यकता है लिंक्डइन कौशल मूल्यांकन परीक्षण के लिये Hadoop. This test consists of multiple-choice questions that cover various topics related to Hadoop, such as its architecture, अवयव, commands, पूरा विंडोज सर्वर, और अधिक.

To help you prepare for this test, I have compiled a list of questions and answers that you may encounter in the exam. These questions and answers are based on my own experience and research, and they are not official or endorsed by लिंक्डइन. तथापि, they can give you an idea of what to expect and how to answer the questions correctly. चाहे आप प्रारंभिक कार्रवाई की समय सीमा या नियमित प्रवेश की समय सीमा के लिए आवेदन कर रहे हों प्रशन तथा जवाब के लिए LinkedIn skill assessment test for Hadoop.

Q1. Partitioner controls the partitioning of what data?

  • final keys
  • final values
  • intermediate keys
  • intermediate values

Q2. SQL Windowing functions are implemented in Hive using which keywords?

  • UNION DISTINCT, RANK
  • ऊपर, RANK
  • ऊपर, EXCEPT
  • UNION DISTINCT, RANK

Q3. Rather than adding a Secondary Sort to a slow Reduce job, it is Hadoop best practice to perform which optimization?

  • Add a partitioned shuffle to the Map job.
  • Add a partitioned shuffle to the Reduce job.
  • Break the Reduce job into multiple, chained Reduce jobs.
  • Break the Reduce job into multiple, chained Map jobs.

Q4. Hadoop Auth enforces authentication on protected resources. Once authentication has been established, it sets what type of authenticating cookie?

  • encrypted HTTP
  • unsigned HTTP
  • compressed HTTP
  • signed HTTP

Q5. MapReduce jobs can be written in which language?

  • Java or Python
  • SQL only
  • SQL or Java
  • Python or SQL

Q6. To perform local aggregation of the intermediate outputs, MapReduce users can optionally specify which object?

  • Reducer
  • Combiner
  • Mapper
  • सॉफ्टमास्टर में आपके पीएलसी कार्यक्रम के विकास में तेजी लाने के लिए विभिन्न प्रकार की विशेषताएं शामिल हैं। और यह कोर्स हनीवेल पीएलसी की पीएलसी मॉडल एमएल -50 श्रृंखला की पूरी प्रोग्रामिंग को कवर कर रहा है।

क्यू 7. To verify job status, look for the value ___ में ___.

  • SUCCEEDED; syslog
  • SUCCEEDED; stdout
  • DONE; syslog
  • DONE; stdout

क्यू 8. Which line of code implements a Reducer method in MapReduce 2.0?

  • public void reduce(Text key, Iterator values, Context context){…}
  • public static void reduce(Text key, IntWritable[] मूल्यों, Context context){…}
  • public static void reduce(Text key, Iterator values, Context context){…}
  • public void reduce(Text key, IntWritable[] मूल्यों, Context context){…}

प्रश्न 9. To get the total number of mapped input records in a map job task, you should review the value of which counter?

  • FileInputFormatCounter
  • FileSystemCounter
  • JobCounter
  • TaskCounter (NOT SURE)

प्र10. Hadoop Core supports which CAP capabilities?

  • ए, पी
  • सी, ए
  • सी, पी
  • सी, ए, पी

प्रश्न 11. What are the primary phases of a Reducer?

  • जोड़ना, नक्शा, and reduce
  • shuffle, क्रम से लगाना, and reduce
  • reduce, क्रम से लगाना, and combine
  • नक्शा, क्रम से लगाना, and combine

प्र12. To set up Hadoop workflow with synchronization of data between jobs that process tasks both on disk and in memory, उपयोग ___ सेवा, जो है ___.

  • Oozie; open source
  • Oozie; commercial software
  • Zookeeper; commercial software
  • Zookeeper; open source

प्रश्न 13. For high availability, which type of multiple nodes should you use?

  • जानकारी
  • नाम
  • स्मृति
  • worker

प्र14. DataNode supports which type of drives?

  • hot swappable
  • cold swappable
  • warm swappable
  • non-swappable

प्रश्न 15. Which method is used to implement Spark jobs?

  • on disk of all workers
  • on disk of the master node
  • in memory of the master node
  • in memory of all workers

प्र16. In a MapReduce job, where does the map() function run?

  • on the reducer nodes of the cluster
  • on the data nodes of the cluster (NOT SURE)
  • on the master node of the cluster
  • on every node of the cluster

प्रश्न 17. To reference a master file for lookups during Mapping, what type of cache should be used?

  • distributed cache
  • local cache
  • partitioned cache
  • cluster cache

प्रश्न 18. Skip bad records provides an option where a certain set of bad input records can be skipped when processing what type of data?

  • cache inputs
  • reducer inputs
  • intermediate values
  • map inputs

क्यू19. Which command imports data to Hadoop from a MySQL database?

  • spark import –connect jdbc:mysql://mysql.example.com/spark –username spark –warehouse-dir user/hue/oozie/deployments/spark
  • sqoop import –connect jdbc:mysql://mysql.example.com/sqoop –username sqoop –warehouse-dir user/hue/oozie/deployments/sqoop
  • sqoop import –connect jdbc:mysql://mysql.example.com/sqoop –username sqoop –password sqoop –warehouse-dir user/hue/oozie/deployments/sqoop
  • spark import –connect jdbc:mysql://mysql.example.com/spark –username spark –password spark –warehouse-dir user/hue/oozie/deployments/spark

प्र20. In what form is Reducer output presented?

  • compressed (NOT SURE)
  • sorted
  • not sorted
  • encrypted

प्र21. Which library should be used to unit test MapReduce code?

  • JUnit
  • XUnit
  • MRUnit
  • HadoopUnit

प्र22. If you started the NameNode, then which kind of user must you be?

  • hadoop-user
  • super-user
  • node-user
  • admin-user

प्र23. State _ between the JVMs in a MapReduce job

प्र24. To create a MapReduce job, what should be coded first?

  • a static job() तरीका
  • a Job class and instance (NOT SURE)
  • a job() तरीका
  • a static Job class

प्रश्न25. To connect Hadoop to AWS S3, which client should you use?

  • S3A
  • S3N
  • S3
  • the EMR S3

प्र26. HBase works with which type of schema enforcement?

  • schema on write
  • no schema
  • external schema
  • schema on read

प्र27. HDFS files are of what type?

  • read-write
  • read-only
  • write-only
  • append-only

प्रश्न 28. A distributed cache file path can originate from what location?

  • hdfs or top
  • एचटीटीपी
  • hdfs or http
  • hdfs

प्र29. Which library should you use to perform ETL-type MapReduce jobs?

  • मधुमुखी का छत्ता
  • Pig
  • Impala
  • Mahout

क्यू30. What is the output of the Reducer?

  • a relational table
  • an update to the input file
  • a single, combined list
  • a set of <चाबी, मूल्य> जोड़े

map function processes a certain key-value pair and emits a certain number of key-value pairs and the Reduce function processes values grouped by the same key and emits another set of key-value pairs as output.

प्रश्न31. To optimize a Mapper, what should you perform first?

  • Override the default Partitioner.
  • Skip bad records.
  • Break up Mappers that do more than one task into multiple Mappers.
  • Combine Mappers that do one task into large Mappers.

प्र32. When implemented on a public cloud, with what does Hadoop processing interact?

  • files in object storage
  • graph data in graph databases
  • relational data in managed RDBMS systems
  • JSON data in NoSQL databases

प्रश्न 33. In the Hadoop system, what administrative mode is used for maintenance?

  • data mode
  • safe mode
  • single-user mode
  • pseudo-distributed mode

प्रश्न34. In what format does RecordWriter write an output file?

  • <चाबी, मूल्य> जोड़े
  • keys
  • मूल्यों
  • <मूल्य, चाबी> जोड़े

क्यू35. To what does the Mapper map input key/value pairs?

  • an average of keys for values
  • a sum of keys for values
  • a set of intermediate key/value pairs
  • a set of final key/value pairs

प्र36. Which Hive query returns the first 1,000 मूल्यों?

  • SELECT…WHERE value = 1000
  • SELECT … LIMIT 1000
  • SELECT TOP 1000 …
  • SELECT MAX 1000…

प्रश्न37. To implement high availability, how many instances of the master node should you configure?

प्रश्न 38. Hadoop 2.x and later implement which service as the resource coordinator?

  • kubernetes
  • JobManager
  • JobTracker
  • YARN

प्र39. In MapReduce, _ have _

  • कार्य; नौकरियां
  • नौकरियां; गतिविधियां
  • नौकरियां; कार्य
  • गतिविधियां; कार्य

क्यू40. What type of software is Hadoop Common?

  • डेटाबेस
  • distributed computing framework
  • ऑपरेटिंग सिस्टम
  • productivity tool

प्र41. If no reduction is desired, you should set the numbers of _ tasks to zero.

  • combiner
  • reduce
  • mapper
  • मध्यवर्ती

प्र42. MapReduce applications use which of these classes to report their statistics?

  • mapper
  • reducer
  • combiner
  • counter

प्रश्न 43. _ is the query language, and _ is storage for NoSQL on Hadoop.

  • एचडीएफएस; HQL
  • HQL; HBase
  • एचडीएफएस; एसक्यूएल
  • एसक्यूएल; HBase

प्रश्न 44. MapReduce 1.0 _ YARN.

  • does not include
  • is the same thing as
  • includes
  • replaces

क्यू45. Which type of Hadoop node executes file system namespace operations like opening, closing, and renaming files and directories?

  • ControllerNode
  • DataNode
  • MetadataNode
  • NameNode

प्र46. HQL queries produce which job types?

  • Impala
  • MapReduce
  • स्पार्क
  • Pig

प्रश्न 47. Suppose you are trying to finish a Pig script that converts text in the input string to uppercase. What code is needed on line 2 नीचे?

1 data = LOAD ‘/user/hue/pig/examples/data/midsummer.txt’… 2

  • जैसा (मूलपाठ:CHAR[]); upper_case = FOREACH data GENERATE org.apache.pig.piggybank.evaluation.string.UPPER(मूलपाठ);
  • जैसा (मूलपाठ:CHARARRAY); upper_case = FOREACH data GENERATE org.apache.pig.piggybank.evaluation.string.UPPER(मूलपाठ);
  • जैसा (मूलपाठ:CHAR[]); upper_case = FOREACH data org.apache.pig.piggybank.evaluation.string.UPPER(मूलपाठ);
  • जैसा (मूलपाठ:CHARARRAY); upper_case = FOREACH data org.apache.pig.piggybank.evaluation.string.UPPER(मूलपाठ);

प्रश्न 48. In a MapReduce job, which phase runs after the Map phase completes?

  • Combiner
  • Reducer
  • Map2
  • Shuffle and Sort

प्र49. Where would you configure the size of a block in a Hadoop environment?

  • dfs.block.size in hdfs-site.xmls
  • orc.write.variable.length.blocks in hive-default.xml
  • mapreduce.job.ubertask.maxbytes in mapred-site.xml
  • hdfs.block.size in hdfs-site.xml

क्यू50. Hadoop systems are _ RDBMS systems.

  • replacements for
  • not used with
  • substitutes for
  • additions for

प्रश्न51. Which object can be used to distribute jars or libraries for use in MapReduce tasks?

  • distributed cache
  • library manager
  • lookup store
  • registry

प्रश्न52. To view the execution details of an Impala query plan, which function would you use?

  • explain
  • query action
  • detail
  • query plan

प्रश्न53. Which feature is used to roll back a corrupted HDFS instance to a previously known good point in time?

  • partitioning
  • snapshot
  • प्रतिकृति
  • उच्च उपलब्धता

संदर्भ

प्रश्न54. Hadoop Common is written in which language?

  • सी++
  • सी
  • Haskell
  • जावा

प्रश्न55. Which file system does Hadoop use for storage?

  • NAS
  • FAT
  • एचडीएफएस
  • NFS

प्रश्न56. What kind of storage and processing does Hadoop support?

  • encrypted
  • verified
  • distributed
  • remote

प्रश्न57. Hadoop Common consists of which components?

  • Spark and YARN
  • HDFS and MapReduce
  • HDFS and S3
  • Spark and MapReduce

प्र 58. Most Apache Hadoop committers’ work is done at which commercial company?

  • Cloudera
  • माइक्रोसॉफ्ट
  • यह उन्हें परीक्षण और त्रुटि रणनीति चलाने के बजाय सर्वोत्तम सामग्री देने की अनुमति देता है जो कम रूपांतरण दर का कारण बन सकता है
  • वीरांगना

प्रश्न59. To get information about Reducer job runs, which object should be added?

  • Reporter
  • IntReadable
  • IntWritable
  • Writer

क्यू 60. After changing the default block size and restarting the cluster, to which data does the new size apply?

  • all data
  • no data
  • existing data
  • new data

प्रश्न 61. Which statement should you add to improve the performance of the following query?

SELECT
  c.id,
  c.name,
  c.email_preferences.categories.surveys
FROM customers c;
  • GROUP BY
  • FILTER
  • SUB-SELECT
  • SORT

प्रश्न 62. What custom object should you implement to reduce IO in MapReduce?

  • Comparator
  • Mapper
  • Combiner
  • Reducer

प्रश्न 63. You can optimize Hive queries using which method?

  • secondary indices
  • summary statistics
  • column-based statistics
  • a primary key index

प्रश्न 64. If you are processing a single action on each input, what type of job should you create?

  • partition-only
  • map-only
  • reduce-only
  • combine-only

प्रश्न 65. The simplest possible MapReduce job optimization is to perform which of these actions?

  • Add more master nodes.
  • Implement optimized InputSplits.
  • Add more DataNodes.
  • Implement a custom Mapper.

प्रश्न 66. When you implement a custom Writable, you must also define which of these object?

  • a sort policy
  • a combiner policy
  • a compression policy
  • a filter policy

प्रश्न 67. To copy a file into the Hadoop file system, what command should you use?

  • hadoop fs -copy
  • hadoop fs -copy
  • hadoop fs -copyFromLocal
  • hadoop fs -copyFromLocal

प्रश्न 68. Delete a Hive _ table and you will delete the table _.

  • managed; metadata
  • external; data and metadata
  • external; metadata
  • managed; जानकारी

प्रश्न 69. To see how Hive executed a JOIN operation, use the _ statement and look for the _ value.

  • EXPLAIN; JOIN Operator
  • QUERY; MAP JOIN Operator
  • EXPLAIN; MAP JOIN Operator
  • QUERY; JOIN Operator

क्यू 70. Pig operates in mainly how many nodes?

  • Two
  • Three
  • चार
  • Five

प्र71. After loading data, _ and then run a(एन) _ query for interactive queries.

  • invalidate metadata; Impala
  • validate metadata; Impala
  • invalidate metadata; मधुमुखी का छत्ता
  • validate metadata; मधुमुखी का छत्ता

प्र72. In Hadoop MapReduce job code, what must be static?

  • पूरा विंडोज सर्वर
  • Mapper and Reducer
  • Mapper
  • Reducer

संदर्भ

प्रश्न 73. In Hadoop simple mode, which object determines the identity of a client process?

  • Kerberos ticket
  • kubernetes token
  • guest operating system
  • host operating system

संदर्भ

प्रश्न 74. Which is not a valid input format for a MapReduce job?

  • FileReader
  • CompositeInputFormat
  • RecordReader
  • TextInputFormat

संदर्भ

प्रश्न 75. If you see org.apache.hadoop.mapred, which version of MapReduce are you working with?

  • 1.एक्स
  • 0.एक्स
  • 2.एक्स
  • 3.एक्स

संदर्भ

लेखक

  • हेलेन बस्सी

    नमस्ते, I'm Helena, एक ब्लॉग लेखक जिसे शिक्षा क्षेत्र में ज्ञानवर्धक सामग्री पोस्ट करने का शौक है. मेरा मानना ​​है कि शिक्षा व्यक्तिगत और सामाजिक विकास की कुंजी है, और मैं अपने ज्ञान और अनुभव को सभी उम्र और पृष्ठभूमि के शिक्षार्थियों के साथ साझा करना चाहता हूं. मेरे ब्लॉग पर, आपको सीखने की रणनीतियों जैसे विषयों पर लेख मिलेंगे, ऑनलाइन शिक्षा, व्यवसायिक नीति, और अधिक. मैं अपने पाठकों की प्रतिक्रिया और सुझावों का भी स्वागत करता हूं, इसलिए बेझिझक एक टिप्पणी छोड़ें या किसी भी समय मुझसे संपर्क करें. मुझे आशा है कि आपको मेरा ब्लॉग पढ़ने में आनंद आएगा और यह उपयोगी और प्रेरणादायक लगेगा.

    सभी पोस्ट देखें
हेलेना बेनार्ड

के बारे में हेलेन बस्सी

नमस्ते, I'm Helena, एक ब्लॉग लेखक जिसे शिक्षा क्षेत्र में ज्ञानवर्धक सामग्री पोस्ट करने का शौक है. मेरा मानना ​​है कि शिक्षा व्यक्तिगत और सामाजिक विकास की कुंजी है, और मैं अपने ज्ञान और अनुभव को सभी उम्र और पृष्ठभूमि के शिक्षार्थियों के साथ साझा करना चाहता हूं. मेरे ब्लॉग पर, आपको सीखने की रणनीतियों जैसे विषयों पर लेख मिलेंगे, ऑनलाइन शिक्षा, व्यवसायिक नीति, और अधिक. मैं अपने पाठकों की प्रतिक्रिया और सुझावों का भी स्वागत करता हूं, इसलिए बेझिझक एक टिप्पणी छोड़ें या किसी भी समय मुझसे संपर्क करें. मुझे आशा है कि आपको मेरा ब्लॉग पढ़ने में आनंद आएगा और यह उपयोगी और प्रेरणादायक लगेगा.

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