MapReduce v2 (MRv2/YARN) is designed to address which two issues?
A. Reduce complexity of the MapReduce APIs.
B. Single point of failure in the NameNode.
C. Resource pressure on the JobTracker.
D. Ability to run frameworks other than MapReduce, such as MPI.
E. Standardize on a single MapReduce API.
F. HDFS latency.
正解:B,C
解説: (Pass4Test メンバーにのみ表示されます)
質問 2:
In a large MapReduce job with m mappers and n reducers, how many distinct copy operations will there be in the sort/shuffle phase?
A. m
B. mXn (i.e., m multiplied by n)
C. mn (i.e., m to the power of n)
D. m+n (i.e., m plus n)
E. n
正解:B
解説: (Pass4Test メンバーにのみ表示されます)
質問 3:
You wrote a map function that throws a runtime exception when it encounters a control character in input data. The input supplied to your mapper contains twelve such characters totals, spread across five file splits. The first four file splits each have two control characters and the last split has four control characters.
Indentify the number of failed task attempts you can expect when you run the job with mapred.max.map.attempts set to 4:
A. You will have twelve failed task attempts
B. You will have seventeen failed task attempts
C. You will have forty-eight failed task attempts
D. You will have twenty failed task attempts
E. You will have five failed task attempts
正解:D
解説: (Pass4Test メンバーにのみ表示されます)
質問 4:
Identify the MapReduce v2 (MRv2 / YARN) daemon responsible for launching application containers and monitoring application resource usage?
A. ApplicationMaster
B. ApplicationMasterService
C. ResourceManager
D. TaskTracker
E. NodeManager
F. JobTracker
正解:E
解説: (Pass4Test メンバーにのみ表示されます)
質問 5:
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
正解:C
解説: (Pass4Test メンバーにのみ表示されます)
質問 6:
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. Ingest with Flume agents
B. HDFS command
C. Pig LOAD command
D. Ingest with Hadoop Streaming
E. Sqoop import
F. Hive LOAD DATA command
正解:E
解説: (Pass4Test メンバーにのみ表示されます)
Niigaki -
試験に参加する前に、CCD-410試験参考書を勉強しました。だから、CCD-410試験に合格出来ました!