Apache-Hadoop-Developer 無料問題集「Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer」

（A）combine

（B）init

（C）configure

（D）map

（A）As many final key-value pairs as desired, as long as all the keys have the same type and all the values have the same type.

（B）As many final key-value pairs as desired. There are no restrictions on the types of those key-value pairs (i.e., they can be heterogeneous).

（C）As many final key-value pairs as desired, but they must have the same type as the intermediate key-value pairs.

（D）One final key-value pair per key; no restrictions on the type.

（E）One final key-value pair per value associated with the key; no restrictions on the type.

（A）Into in-memory buffers that spill over to the local file system of the TaskTracker node running the Mapper.

（B）Intermediate data in streamed across the network from Mapper to the Reduce and is never written to disk.

（C）Into in-memory buffers on the TaskTracker node running the Mapper that spill over and are written into HDFS.

（D）Into in-memory buffers that spill over to the local file system (outside HDFS) of the TaskTracker node running the Reducer

（E）Into in-memory buffers on the TaskTracker node running the Reducer that spill over and are written into HDFS.

（A）hadoop fs -get X Y

（B）hadoop fs -localPut X Y

（C）hadoop fs-put X Y

（D）hadoop scp X Y

（A）The data types specified in HADOOP_MAP_DATATYPES environment variable

（B）The InputFormat used by the job determines the mapper's input key and value types.

（C）The key and value types specified in the JobConf.setMapInputKeyClass and JobConf.setMapInputValuesClass methods

（D）The mapper-specification.xml file submitted with the job determine the mapper's input key and value types.

（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）Stored in the Metastore.

（B）Stored as metadata on the NameNode.

（C）Stored along with the data in HDFS.

（D）Stored in ZooKeeper.

（A）ApplicationMaster

（B）ResourceManager

（C）ApplicationMasterService

（D）NodeManager

（E）JobTracker

（F）TaskTracker