HADOOP-PR000007 無料問題集「Hortonworks-Certified-Apache-Hadoop-2.0-Developer(Pig and Hive Developer)」

（A）The default partitioner implements a round-robin strategy, shuffling the key-value pairs to each reducer
in turn. This ensures an event partition of the key space.

（B）The default partitioner computes the hash of the key and divides that valule modulo the number of
reducers. The result determines the reducer assigned to process the key-value pair.

（C）The default partitioner assigns key-values pairs to reduces based on an internal random number
generator.

（D）The default partitioner computes the hash of the key. Hash values between specific ranges are
associated with different buckets, and each bucket is assigned to a specific reducer.

（E）The default partitioner computes the hash of the value and takes the mod of that value with the number
of reducers. The result determines the reducer assigned to process the key-value pair.

（A）The output of the dump d command is (M, {(38,95in),(62,95i02)})

（B）The Output Of the DUMP D command IS (M,{(M,62.95102),(M,38,95111)})

（C）The code executes successfully but there is not output because the D relation is empty

（D）The code does not execute successfully because D is not a valid relation

（A）The ApplicationMaster requests resources from the ResourceManager

（B）The ResourceManager monitors and restarts any failed Containers of the ApplicationMaster

（C）The ApplicationMaster starts an instance of the ResourceManager within each Container

（D）The ApplicationMaster starts a single instance of the ResourceManager

（A）The number of input files a mapper must process.

（B）The number of values across different keys in the iterator supplied to a single reduce method call.

（C）The number of output files a reducer must produce.

（D）The amount of intermediate data that must be transferred between the mapper and reducer.

（A）Metanode

（B）NameSpaceManager

（C）DataNode

（D）NameNode

（A）The amount of RAM installed on the TaskTracker node.

（B）The amount of free disk space on the TaskTracker node.

（C）The average system load on the TaskTracker node over the past fifteen (15) minutes.

（D）The location of the InsputSplit to be processed in relation to the location of the node.

（E）The number and speed of CPU cores on the TaskTracker node.

（A）job.properties

（B）Workflow.xml

（C）Config-default.xml

（D）Oozie.xml

（A）Accepts only data that is defined by metadata tables stored in a database

（B）Accepts only data that has a key/value pair structure

（C）Accepts tab-delimited text data only

（D）Accepts any data: structured or unstructured

（E）Accepts data whether it has metadata or not

（A）Override isSplitable.

（B）Be a subclass of FileInputFormat.

（C）Implement a splittable compression algorithm.

（D）Implement WritableComparable.

（E）Implement a comparator for speedy sorting.

（A）The statement is not a valid Hive command

（B）A new table named mytable is created, and the contents of myothertable are copied into mytable

（C）Any existing data in mytable will be overwritten

（D）The contents of myothertable are appended to mytable