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試験番号：CCA-470問題集
試験科目：Cloudera 「Cloudera Certified Administrator for Apache Hadoop CDH4 Upgrade Exam (CCAH)」
問題と解答：全87問
試験番号：CCA-410問題集
試験科目：Cloudera 「Cloudera Certified Administrator for Apache Hadoop CDH4」
問題と解答：全60問
試験番号：CCD-470問題集
試験科目：Cloudera 「Cloudera Certified Developer for Apache Hadoop CDH4 Upgrade Exam (CCDH)」
問題と解答：全94問
試験番号：CCD-410問題集
試験科目：Cloudera 「Cloudera Certified Developer for Apache Hadoop (CCDH)」
問題と解答：全60問
試験番号：CCB-400問題集
試験科目：Cloudera 「Cloudera Certified Specialist in Apache HBase」
問題と解答：全45問
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NO.1 In a MapReduce job with 500 map tasks, how many map task attempts will there be?
A. It depends on the number of reduces in the job.
B. Between 500 and 1000.
C. At most 500.
D. At least 500.
E. Exactly 500.
Answer: D
Cloudera認定資格 CCD-410参考書 CCD-410認定資格 CCD-410参考書
NO.2 Can you use MapReduce to perform a relational join on two large tables sharing a key?
Assume
that the two tables are formatted as comma-separated files in HDFS.
A. Yes.
B. Yes, but only if one of the tables fits into memory
C. Yes, so long as both tables fit into memory.
D. No, MapReduce cannot perform relational operations.
E. No, but it can be done with either Pig or Hive.
Answer: A
Cloudera問題集 CCD-410 CCD-410過去問 CCD-410 CCD-410 CCD-410参考書
NO.3 Your cluster’s HDFS block size in 64MB. You have directory containing 100 plain text files, each
of
which is 100MB in size. The InputFormat for your job is TextInputFormat. Determine how many
Mappers will run?
A. 64
B. 100
C. 200
D. 640
Answer: C
Cloudera CCD-410認定証 CCD-410認証試験 CCD-410
NO.4 When is the earliest point at which the reduce method of a given Reducer can be called?
A. As soon as at least one mapper has finished processing its input split.
B. As soon as a mapper has emitted at least one record.
C. Not until all mappers have finished processing all records.
D. It depends on the InputFormat used for the job.
Answer: C
Cloudera認証試験 CCD-410認定試験 CCD-410認定資格 CCD-410過去問
NO.5 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. mXn (i.e., m multiplied by n)
B. n
C. m
D. m+n (i.e., m plus n)
E. E.mn(i.e., m to the power of n)
Answer: A
Cloudera認定試験 CCD-410 CCD-410 CCD-410 CCD-410参考書
NO.6 You need to move a file titled “weblogs” into HDFS. When you try to copy the file, you can’t.
You
know you have ample space on your DataNodes. Which action should you take to relieve this
situation and store more files in HDFS?
A. Increase the block size on all current files in HDFS.
B. Increase the block size on your remaining files.
C. Decrease the block size on your remaining files.
D. Increase the amount of memory for the NameNode.
E. Increase the number of disks (or size) for the NameNode.
F. Decrease the block size on all current files in HDFS.
Answer: C
Cloudera問題集 CCD-410練習問題 CCD-410 CCD-410 CCD-410
10. Indentify which best defines a SequenceFile?
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 heterogeneous Writable
objects
C. A SequenceFile contains a binary encoding of an arbitrary number of WritableComparable
objects, in sorted order.
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.
Answer: D
Cloudera練習問題 CCD-410 CCD-410練習問題 CCD-410認定試験 CCD-410問題集
NO.7 MapReduce v2 (MRv2 /YARN) splits which major functions of the JobTracker into separate
daemons? Select two.
A. Heath states checks (heartbeats)
B. Resource management
C. Job scheduling/monitoring
D. Job coordination between the ResourceManager and NodeManager
E. Launching tasks
F. Managing file system metadata
G. MapReduce metric reporting
H. Managing tasks
Answer: B,D
Cloudera CCD-410参考書 CCD-410 CCD-410認証試験
NO.8 For each intermediate key, each reducer task can emit:
A. As many final key-value pairs as desired. There are no restrictions on the types of those keyvalue
pairs (i.e., they can be heterogeneous).
B. As many final key-value pairs as desired, but they must have the same type as the intermediate
key-value pairs.
C. 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.
D. One final key-value pair per value associated with the key; no restrictions on the type.
E. One final key-value pair per key; no restrictions on the type.
Answer: E
Cloudera CCD-410 CCD-410認定証 CCD-410
NO.9 Which process describes the lifecycle of a Mapper?
A. The JobTracker calls the TaskTracker’s configure () method, then its map () method and finally
its close () method.
B. The TaskTracker spawns a new Mapper to process all records in a single input split.
C. The TaskTracker spawns a new Mapper to process each key-value pair.
D. The JobTracker spawns a new Mapper to process all records in a single file.
Answer: C
Cloudera CCD-410参考書 CCD-410認定証 CCD-410 CCD-410過去問
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