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最新的 HCAHD Apache-Hadoop-Developer 免費考試真題:

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

A) Offers real-time queries and row level updates
B) Useful for data analysts familiar with SQL who need to do ad-hoc queries
C) Is a relational database
D) Allows you to define a structure for your unstructured Big Data

2. MapReduce v2 (MRv2/YARN) is designed to address which two issues?

A) Resource pressure on the JobTracker.
B) HDFS latency.
C) Standardize on a single MapReduce API.
D) Single point of failure in the NameNode.
E) Ability to run frameworks other than MapReduce, such as MPI.
F) Reduce complexity of the MapReduce APIs.

3. You have just executed a MapReduce job. Where is intermediate data written to after being emitted from the Mapper's map method?

A) Intermediate data in streamed across the network from Mapper to the Reduce and is never written to disk.
B) Into in-memory buffers on the TaskTracker node running the Reducer that spill over and are written into HDFS.
C) Into in-memory buffers on the TaskTracker node running the Mapper that spill over and are written into HDFS.
D) Into in-memory buffers that spill over to the local file system of the TaskTracker node running the Mapper.
E) Into in-memory buffers that spill over to the local file system (outside HDFS) of the TaskTracker node running the Reducer

4. Which two of the following are true about this trivial Pig program' (choose Two)

A) Pig assumes the contents of myfile are comma delimited
B) myfile is read from the user's home directory in HDFS
C) The contents of myfile appear on stdout
D) ABC has a schema associated with it

5. When is the earliest point at which the reduce method of a given Reducer can be called?

A) It depends on the InputFormat used for the job.
B) As soon as at least one mapper has finished processing its input split.
C) Not until all mappers have finished processing all records.
D) As soon as a mapper has emitted at least one record.

問題與答案：