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Free C2090-101 Exam Braindumps (page: 7)

Page 6 of 27
PDF with 106 Questions

Which of the following is not a capability of Pig?

  1. Low-latency queries
  2. Schemas are optional
  3. Nested relational data model
  4. A high level abstraction on top of MapReduce

Answer(s): A


Reference:

http://hadooptutorial.info/apache-pig-overview/



Given a file named readme.txt, which command will copy the readme.txt file to the <user> directory on the HDFS?

  1. hadoop fs ­cp readme.txt hdfs://test.ibm.com:9000/<user>
  2. hadoop fs ­cp hdfs://test.ibm.com:9000/<user> readme.txt
  3. hadoop fs ­put readme.txt hdfs://test.ibm.com:9000/<user>
  4. hadoop fs ­put hdfs://test.ibm.com:9000/<user> readme.text

Answer(s): B



Which of the following is the most effective method for improving query performance on large Hive tables?

  1. Indexing
  2. Bucketing
  3. Partitioning
  4. De-normalizing data

Answer(s): B


Reference:

https://dzone.com/articles/how-to-improve-hive-query-performance-with-hadoop



Which one of the following is NOT provided by the SerDe interface?

  1. SerDe interface has to be built using C or C++ language
  2. Allows SQL-style queries across data that is often not appropriate for a relational database
  3. Serializer takes a Java object that Big SQL has been working with, and turns it into a format that BigSQL can write to HDFS
  4. Deserializer interface takes a string or binary representation of a record, and translates it into a Java object that Big SQL can manipulate

Answer(s): A






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