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 |
|---|---|
| Topic 1: Data Transformation with Pig | - Pig Latin programming
|
| Topic 2: Data Ingestion | - Import data into Hadoop
|
| Topic 3: Data Analysis with Hive | - Hive query development
|
| Topic 4: Data Processing | - End-to-end Hadoop workflows
|
Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:
Which best describes what the map method accepts and emits?
- A. It accepts a single key-value pair as input and emits a single key and list of corresponding values as output.
- B. It accepts a single key-value pairs as input and can emit only one key-value pair as output.
- C. It accepts a single key-value pairs as input and can emit any number of key-value pair as output, including zero.
- D. It accepts a list key-value pairs as input and can emit only one key-value pair as output.
Correct Answer: C 🗳️
Explanation: Only visible for ExamPrepAway members. You can sign-up / login (it's free).
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 a Writable object. The API leaves unspecified whether this is a reused object or a new object.
- B. 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.
- C. It returns a reference to the same Writable object each time, but populated with different data.
- D. It returns a reference to a different Writable object time.
- E. It returns a reference to a Writable object from an object pool.
Correct Answer: C 🗳️
Explanation: Only visible for ExamPrepAway members. You can sign-up / login (it's free).
Which one of the following statements regarding the components of YARN is FALSE?
- A. A client application submits a YARW job to the ResourceManager
- B. The ResourceManager is responsible for scheduling and allocating resources
- C. A Container executes a specific task as assigned by the ApplicationMaster
- D. The ResourceManager monitors and restarts any failed Containers
Correct Answer: D 🗳️
Which one of the following classes would a Pig command use to store data in a table defined in HCatalog?
- A. Pig scripts cannot use an HCatalog table
- B. org.apache.hcatalog.pig.HCatStorer
- C. org.apache.hcatalog.pig.HCatOutputFormat
- D. No special class is needed for a Pig script to store data in an HCatalog table
Correct Answer: B 🗳️
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 DataCache 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 configure method of the mapper.
- C. Place the data file in the DistributedCache and read the data into memory in the map 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: A 🗳️
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