Apache-Hadoop-Developer 무료 덤프문제 온라인 액세스

Which HDFS command displays the contents of the file x in the user's HDFS home directory?

• A.hadoop fs -cp x
• B.hadoop fs -cat x
• C.hadoop fs -Is x
• D.hdfs fs -get x

You want to run Hadoop jobs on your development workstation for testing before you submit them to your production cluster. Which mode of operation in Hadoop allows you to most closely simulate a production cluster while using a single machine?

• A.Run simldooop, the Apache open-source software for simulating Hadoop clusters.
• B.Run the hadoop command with the -jt local and the -fs file:///options.
• C.Run the DataNode, TaskTracker, NameNode and JobTracker daemons on a single machine.
• D.Run all the nodes in your production cluster as virtual machines on your development workstation.

In a large MapReduce job with m mappers and n reducers, how many distinct copy
operations will there be in the sort/shuffle phase?

• A.m+n (i.e., m plus n)
• B.mn (i.e., m to the power of n)
• C.mXn (i.e., m multiplied by n)
• D.n
• E.m

All keys used for intermediate output from mappers must:

• A.Implement WritableComparable.
• B.Be a subclass of FileInputFormat.
• C.Implement a comparator for speedy sorting.
• D.Implement a splittable compression algorithm.
• E.Override isSplitable.

Which one of the following classes would a Pig command use to store data in a table defined in HCatalog?

• A.org.apache.hcatalog.pig.HCatStorer
• B.Pig scripts cannot use an HCatalog table
• C.No special class is needed for a Pig script to store data in an HCatalog table
• D.org.apache.hcatalog.pig.HCatOutputFormat