HDPCD 無料問題集「Hortonworks Data Platform Certified Developer」

（A）Have your system administrator place the JAR file on a Web server accessible to all cluster nodes and then set the HTTP_JAR_URL environment variable to its location.

（B）Have your system administrator copy the JAR to all nodes in the cluster and set its location in the HADOOP_CLASSPATH environment variable before you submit your job.

（C）When submitting the job on the command line, specify the -libjars option followed by the JAR file path.

（D）Package your code and the Apache Commands Math library into a zip file named JobJar.zip

（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 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）hadoop fs -cat x

（B）hdfs fs -get x

（C）hadoop fs -cp x

（D）hadoop fs -Is x

（A）All data produced by a single mapper.

（B）All data for a given key, regardless of which mapper(s) produced it.

（C）All data for a given value, regardless of which mapper(s) produced it.

（D）All the data in a single input file.

（A）The ResourceManager is responsible for scheduling and allocating resources

（B）The ResourceManager monitors and restarts any failed Containers

（C）A Container executes a specific task as assigned by the ApplicationMaster

（D）A client application submits a YARW job to the ResourceManager

（A）A SequenceFile contains a binary encoding of an arbitrary number of homogeneous Writable objects

（B）A SequenceFile contains a binary encoding of an arbitrary number of WritableComparable objects, in sorted order.

（C）A SequenceFile contains a binary encoding of an arbitrary number of heterogeneous Writable objects

（D）A SequenceFile contains a binary encoding of an arbitrary number key-value pairs. Each key must be the same type. Each value must be the same type.

（A）The ApplicationMaster starts the NodeManager in a Container

（B）The NodeManager creates an instance of the ApplicationMaster

（C）The NodeManager requests resources from the ApplicationMaster

（D）The ApplicationMaster starts the NodeManager outside of a Container

（A）Sequences of MapReduce job only; on Pig on Hive tasks or jobs. These MapReduce sequences can be combined with forks and path joins.

（B）Iterntive repetition of MapReduce jobs until a desired answer or state is reached.

（C）Sequences of MapReduce and Pig. These sequences can be combined with other actions including forks, decision points, and path joins.

（D）Sequences of MapReduce and Pig jobs. These are limited to linear sequences of actions with exception handlers but no forks.

（A）The JobTracker spawns a new Mapper to process all records in a single file.

（B）The JobTracker calls the TaskTracker's configure () method, then its map () method and finally its close () method.

（C）The TaskTracker spawns a new Mapper to process all records in a single input split.

（D）The TaskTracker spawns a new Mapper to process each key-value pair.