HDPCD 무료 덤프문제 온라인 액세스

MapReduce v2 (MRv2/YARN) is designed to address which two issues?

• A.Ability to run frameworks other than MapReduce, such as MPI.
• B.Reduce complexity of the MapReduce APIs.
• C.Single point of failure in the NameNode.
• D.HDFS latency.
• E.Standardize on a single MapReduce API.
• F.Resource pressure on the JobTracker.

Examine the following Hive statements:

Assuming the statements above execute successfully, which one of the following statements is true?

• A.The output of each reducer is only the age column
• B.The SORT BY command causes only one reducer to be used
• C.Each reducer generates a file sorted by age
• D.The output is guaranteed to be a single file with all the data sorted by age

The Hadoop framework provides a mechanism for coping with machine issues such as faulty configuration or impending hardware failure. MapReduce detects that one or a number of machines are performing poorly and starts more copies of a map or reduce task. All the tasks run simultaneously and the task finish first are used. This is called:

• A.IdentityReducer
• B.Combine
• C.Speculative Execution
• D.Default Partitioner
• E.IdentityMapper

Which one of the following statements is FALSE regarding the communication between DataNodes and a federation of NameNodes in Hadoop 2.2?

• A.DataNodes send periodic block reports to all the NameNodes.
• B.Each DataNode registers with all the NameNodes.
• C.DataNodes send periodic heartbeats to all the NameNodes.
• D.Each DataNode receives commands from one designated master NameNode.

Identify the tool best suited to import a portion of a relational database every day as files into HDFS, and generate Java classes to interact with that imported data?

• A.Sqoop
• B.Oozie
• C.Flume
• D.Hue
• E.Hive
• F.Pig
• G.fuse-dfs