Hortonworks-Certified-Apache-Hadoop-2.0-Developer(Pig and Hive Developer) : HADOOP-PR000007

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最新的 HDP Certified Developer HADOOP-PR000007 免費考試真題:

1. In the reducer, the MapReduce API provides you with an iterator over Writable values. What does calling
the next () method return?

A) It returns a reference to the same Writable object each time, but populated with different data.
B) It returns a reference to a different Writable object time.
C) It returns a reference to the same Writable object if the next value is the same as the previous value, or
a new Writable object otherwise.
D) It returns a reference to a Writable object. The API leaves unspecified whether this is a reused object
or a new object.
E) It returns a reference to a Writable object from an object pool.

2. Which one of the following statements regarding the components of YARN is FALSE?

A) A Container executes a specific task as assigned by the ApplicationMaster
B) A client application submits a YARW job to the ResourceManager
C) The ResourceManager is responsible for scheduling and allocating resources
D) The ResourceManager monitors and restarts any failed Containers

3. Consider the following two relations, A and B.

A Pig JOIN statement that combined relations A by its first field and B by its second field would produce
what output?

A) 2 cherry Jim, Chris 3 orange Terry 4 peach Brian
B) 2 Jim Chris 2 3 Terry 3 4 Brian 4
C) 2 cherry Jim 2 2 cherry Chris 2 3 orange Terry 3 4 peach Brian 4
D) 2 cherry 2 cherry 3 orange 4 peach

4. 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) n
C) mXn (i.e., m multiplied by n)
D) mn (i.e., m to the power of n)
E) m+n (i.e., m plus n)

5. Which one of the following statements describes the relationship between the ResourceManager and the
ApplicationMaster?

A) The ApplicationMaster starts an instance of the ResourceManager within each Container
B) The ApplicationMaster starts a single instance of the ResourceManager
C) The ResourceManager monitors and restarts any failed Containers of the ApplicationMaster
D) The ApplicationMaster requests resources from the ResourceManager

問題與答案：