HDPCD 무료 덤프문제 온라인 액세스

What does the following WebHDFS command do?
Curl -1 -L "http://host:port/webhdfs/v1/foo/bar?op=OPEN"

• A.List a directory /foo
• B.Delete a directory /foo/bar
• C.Make a directory /foo/bar
• D.Read a file /foo/bar

In a MapReduce job, the reducer receives all values associated with same key. Which statement best describes the ordering of these values?

• A.The values are arbitrary ordered, but multiple runs of the same MapReduce job will always have the same ordering.
• B.The values are in sorted order.
• C.The values are arbitrarily ordered, and the ordering may vary from run to run of the same MapReduce job.
• D.Since the values come from mapper outputs, the reducers will receive contiguous sections of sorted values.

Your client application submits a MapReduce job to your Hadoop cluster. Identify the Hadoop daemon on which the Hadoop framework will look for an available slot schedule a MapReduce operation.

• A.NameNode
• B.TaskTracker
• C.JobTracker
• D.Secondary NameNode
• E.DataNode

You have user profile records in your OLPT database, that you want to join with web logs you have already ingested into the Hadoop file system. How will you obtain these user records?

• A.Sqoop import
• B.Hive LOAD DATA command
• C.HDFS command
• D.Ingest with Flume agents
• E.Ingest with Hadoop Streaming
• F.Pig LOAD command

Indentify which best defines a SequenceFile?

• A.A SequenceFile contains a binary encoding of an arbitrary number of WritableComparable objects, in sorted order.
• B.A SequenceFile contains a binary encoding of an arbitrary number of heterogeneous Writable objects
• C.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.
• D.A SequenceFile contains a binary encoding of an arbitrary number of homogeneous Writable objects