LinkedIn Hadoop Assessment Answers 2021

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LinkedIn Hadoop Assessment Quiz  Answers

LinkedIn Hadoop Assessment Answers 2021

Linkedin Hadoop Assessment Questions and  Answers 2021

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
  •  OVER, RANK
  •  OVER, 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
  •  Counter
Q7. To verify job status, look for the value **_** in the **_**.
 
  •  SUCCEEDED; syslog
  •  SUCCEEDED; stdout
  •  DONE; syslog
  •  DONE; stdout
Q8. 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[] values, Context context){…}
  •  public static void reduce(Text key, Iterator values, Context context){…}
  •  public void reduce(Text key, IntWritable[] values, Context context){…}
Q9. 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)
Q10. Hadoop Core supports which CAP capabilities?
  •  A, P
  •  C, A
  •  C, P
  •  C, A, P
Q11. What are the primary phases of a Reducer?
  •  combine, map, and reduce
  •  shuffle, sort, and reduce
  •  reduce, sort, and combine
  •  map, sort, and combine
Q12. To set up Hadoop workflow with synchronization of data between jobs that process tasks both on disk and in memory, use the _ service, which is _.
  •  Oozie; open source
  •  Oozie; commercial software
  •  Zookeeper; commercial software
  •  Zookeeper; open source
Q13. For high availability, use multiple nodes of which type?
  •  data
  •  name
  •  memory
  •  worker
Q14. DataNode supports which type of drives?
  •  hot swappable
  •  cold swappable
  •  warm swappable
  •  non-swappable
Q15. 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
Q16. 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
Q17. To reference a master file for lookups during Mapping, what type of cache should be used?
  •  distributed cache
  •  local cache
  •  partitioned cache
  •  cluster cache
Q18. Skip bad records provide 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

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