최신 HDPCD 무료덤프 - Hortonworks Data Platform Certified Developer

문제1

Given the following Hive command:

Which one of the following statements is true?

A. The files in the mydata folder are copied to a subfolder of /apps/hlve/warehouse

B. The files in the mydata folder are moved to a subfolder of /apps/hive/wa re house

C. The files in the mydata folder do not move from their current location In HDFS

D. The files in the mydata folder are copied into Hive's underlying relational database

정답: C

문제2

A combiner reduces:

A. The amount of intermediate data that must be transferred between the mapper and reducer.

B. The number of output files a reducer must produce.

C. The number of values across different keys in the iterator supplied to a single reduce method call.

D. The number of input files a mapper must process.

정답: A

설명: (DumpTOP 회원만 볼 수 있음)

문제3

Which two of the following statements are true about Pig's approach toward data? Choose 2 answers

A. Accepts only data that has a key/value pair structure

B. Accepts only data that is defined by metadata tables stored in a database

C. Accepts tab-delimited text data only

D. Accepts any data: structured or unstructured

E. Accepts data whether it has metadata or not

정답: D,E

문제4

Which YARN component is responsible for monitoring the success or failure of a Container?

A. ApplicationMaster

B. NodeManager

C. JobTracker

D. ResourceManager

정답: D

문제5

Indentify which best defines a SequenceFile?

A. 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.

B. A SequenceFile contains a binary encoding of an arbitrary number of homogeneous 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 of heterogeneous Writable objects

정답: A

설명: (DumpTOP 회원만 볼 수 있음)

문제6

What does the following command do? register '/piggyban):/pig-files.jar';

A. Specifies the location of the JAR file containing the user-defined functions

B. Assigns a name to a user-defined function or streaming command

C. Transforms Pig user-defined functions into a format that Hive can accept

D. Invokes the user-defined functions contained in the jar file

정답: A

문제7

You want to count the number of occurrences for each unique word in the supplied input data. You've decided to implement this by having your mapper tokenize each word and emit a literal value 1, and then have your reducer increment a counter for each literal 1 it receives. After successful implementing this, it occurs to you that you could optimize this by specifying a combiner. Will you be able to reuse your existing Reduces as your combiner in this case and why or why not?

A. No, because the Combiner is incompatible with a mapper which doesn't use the same data type for both the key and value.

B. No, because the Reducer and Combiner are separate interfaces.

C. Yes, because the sum operation is both associative and commutative and the input and output types to the reduce method match.

D. No, because the sum operation in the reducer is incompatible with the operation of a Combiner.

E. Yes, because Java is a polymorphic object-oriented language and thus reducer code can be reused as a combiner.

정답: C

설명: (DumpTOP 회원만 볼 수 있음)

문제8

For each intermediate key, each reducer task can emit:

A. As many final key-value pairs as desired, but they must have the same type as the intermediate key-value pairs.

B. One final key-value pair per key; no restrictions on the type.

C. One final key-value pair per value associated with the key; no restrictions on the type.

D. As many final key-value pairs as desired. There are no restrictions on the types of those key-value pairs (i.e., they can be heterogeneous).

E. 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.

정답: E

설명: (DumpTOP 회원만 볼 수 있음)

문제9

Which TWO of the following statements are true regarding Hive? Choose 2 answers

A. Offers real-time queries and row level updates

B. Is a relational database

C. Useful for data analysts familiar with SQL who need to do ad-hoc queries

D. Allows you to define a structure for your unstructured Big Data

정답: C,D

문제10

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 Reducer's reduce method be invoked?

A. 6

B. 1

C. 3

D. 0

E. 5

정답: C

설명: (DumpTOP 회원만 볼 수 있음)

최신 HDPCD 무료덤프 - Hortonworks Data Platform Certified Developer

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