Exam Name: Hadoop 2.0 Certification exam for Pig and Hive Developer
Certification Provider: Hortonworks
Corresponding Certification: HCAHD
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Hortonworks Apache-Hadoop-Developer Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Data Ingestion | - Import data into Hadoop
|
| Data Analysis with Hive | - Hive query development
|
| Data Processing | - End-to-end Hadoop workflows
|
| Data Transformation with Pig | - Pig Latin programming
|
Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:
Which HDFS command displays the contents of the file x in the user's HDFS home directory?
- A. hadoop fs -cat x
- B. hadoop fs -Is x
- C. hdfs fs -get x
- D. hadoop fs -cp x
Correct Answer: A 🗳️
To process input key-value pairs, your mapper needs to lead a 512 MB data file in memory. What is the best way to accomplish this?
- A. Place the data file in the DistributedCache and read the data into memory in the configure method of the mapper.
- B. Place the data file in the DistributedCache and read the data into memory in the map method of the mapper.
- C. Place the data file in the DataCache and read the data into memory in the configure method of the mapper.
- D. Serialize the data file, insert in it the JobConf object, and read the data into memory in the configure method of the mapper.
Correct Answer: C 🗳️
Which one of the following statements is true about a Hive-managed table?
- A. When the table is dropped, the underlying folder in HDFS is deleted.
- B. Hive dynamically defines the schema of the table based on the FROM clause of a SELECT query.
- C. Records can only be added to the table using the Hive INSERT command.
- D. Hive dynamically defines the schema of the table based on the format of the underlying data.
Correct Answer: A 🗳️
Review the following data and Pig code:
What command to define B would produce the output (M,62,95l02) when invoking the DUMP operator on B?
- A. B = FILTER A BY (zip = = '95102' AND gender = = M");
- B. B = JOIN A BY (gender = = 'M' AND zip = = '95102');
- C. B= GROUP A BY (zip = = '95102' AND gender = = 'M');
- D. B= FOREACH A BY (gender = = 'M' AND zip = = '95102');
Correct Answer: A 🗳️
Which process describes the lifecycle of a Mapper?
- A. The TaskTracker spawns a new Mapper to process all records in a single input split.
- B. The JobTracker calls the TaskTracker's configure () method, then its map () method and finally its close () method.
- C. The TaskTracker spawns a new Mapper to process each key-value pair.
- D. The JobTracker spawns a new Mapper to process all records in a single file.
Correct Answer: A 🗳️
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