Hortonworks Hortonworks-Certified-Apache-Hadoop-2.0- - Developer Hadoop 2.0 Certification exam for Pig and Hive Developer Exam
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Total 108 questions
Question #11 (Topic: )
You want to Ingest log files Into HDFS, which tool would you use?
A. HCatalog
B. Flume
C. Sqoop
D. Ambari
Answer: B
Question #12 (Topic: )
A client application creates an HDFS file named foo.txt with a replication factor of 3. Identify
which best describes the file access rules in HDFS if the file has a single block that is
stored on data nodes A, B and C?
which best describes the file access rules in HDFS if the file has a single block that is
stored on data nodes A, B and C?
A. The file will be marked as corrupted if data node B fails during the creation of the file.
B. Each data node locks the local file to prohibit concurrent readers and writers of the file.
C. Each data node stores a copy of the file in the local file system with the same name as the HDFS file.
D. The file can be accessed if at least one of the data nodes storing the file is available.
Answer: D
Question #13 (Topic: )
Which HDFS command copies an HDFS file named foo to the local filesystem as localFoo?
A. hadoop fs -get foo LocalFoo
B. hadoop -cp foo LocalFoo
C. hadoop fs -Is foo
D. hadoop fs -put foo LocalFoo
Answer: A
Question #14 (Topic: )
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:
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 forty-eight failed task attempts
B. You will have seventeen failed task attempts
C. You will have five failed task attempts
D. You will have twelve failed task attempts
E. You will have twenty failed task attempts
Answer: E
Question #15 (Topic: )
You have written a Mapper which invokes the following five calls to the
OutputColletor.collect method:
output.collect (new Text (Apple), new Text (Red) ) ;
output.collect (new Text (Banana), new Text (Yellow) ) ;
output.collect (new Text (Apple), new Text (Yellow) ) ;
output.collect (new Text (Cherry), new Text (Red) ) ;
output.collect (new Text (Apple), new Text (Green) ) ;
How many times will the Reducers reduce method be invoked?
OutputColletor.collect method:
output.collect (new Text (Apple), new Text (Red) ) ;
output.collect (new Text (Banana), new Text (Yellow) ) ;
output.collect (new Text (Apple), new Text (Yellow) ) ;
output.collect (new Text (Cherry), new Text (Red) ) ;
output.collect (new Text (Apple), new Text (Green) ) ;
How many times will the Reducers reduce method be invoked?
A. 6
B. 3
C. 1
D. 0
E. 5
Answer: B
