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Hortonworks Apache-Hadoop-Developer Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Apache Hive | - HiveQL Query Language
|
| Topic 2: Apache Pig | - Pig execution model
|
| Topic 3: Data Processing and Integration | - Data ingestion and ETL workflows
|
| Topic 4: Hadoop Ecosystem Fundamentals | - YARN and Resource Management
|
Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:
Assuming the following Hive query executes successfully:
Which one of the following statements describes the result set?
- A. An 80-value ngram of sentences that contain the words "you" or "are" in the lines column of the inputdata table.
- B. A frequency distribution of the top 80 words that follow the subsequence "you are" in the lines column of the inputdata table.
- C. A trigram of the top 80 sentences that contain "you are" followed by a null space in the lines column of the inputdata table.
- D. A bigram of the top 80 sentences that contain the substring "you are" in the lines column of the input data A1 table.
Correct Answer: B 🗳️
You've written a MapReduce job that will process 500 million input records and generated 500 million key-value pairs. The data is not uniformly distributed. Your MapReduce job will create a significant amount of intermediate data that it needs to transfer between mappers and reduces which is a potential bottleneck. A custom implementation of which interface is most likely to reduce the amount of intermediate data transferred across the network?
- A. Partitioner
- B. WritableComparable
- C. Writable
- D. OutputFormat
- E. Combiner
- F. InputFormat
Correct Answer: E 🗳️
Explanation: Only visible for VCE4Dumps members. You can sign-up / login (it's free).
You have just executed a MapReduce job. Where is intermediate data written to after being emitted from the Mapper's map method?
- A. Into in-memory buffers on the TaskTracker node running the Mapper that spill over and are written into HDFS.
- B. Into in-memory buffers that spill over to the local file system of the TaskTracker node running the Mapper.
- C. Into in-memory buffers that spill over to the local file system (outside HDFS) of the TaskTracker node running the Reducer
- D. Intermediate data in streamed across the network from Mapper to the Reduce and is never written to disk.
- E. Into in-memory buffers on the TaskTracker node running the Reducer that spill over and are written into HDFS.
Correct Answer: B 🗳️
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Which one of the following files is required in every Oozie Workflow application?
- A. Config-default.xml
- B. job.properties
- C. Workflow.xml
- D. Oozie.xml
Correct Answer: C 🗳️
Indentify which best defines a SequenceFile?
- A. A SequenceFile contains a binary encoding of an arbitrary number of WritableComparable objects, in sorted order.
- B. 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.
- C. A SequenceFile contains a binary encoding of an arbitrary number of homogeneous Writable objects
- D. A SequenceFile contains a binary encoding of an arbitrary number of heterogeneous Writable objects
Correct Answer: B 🗳️
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