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Hortonworks HADOOP-PR000007 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Pig Development | - Pig data types and UDFs - Pig Latin scripting |
| Hadoop Core Concepts | - YARN and MapReduce fundamentals - HDFS architecture and commands |
| Hive Development | - Hive optimization and execution - Hive table definitions and queries |
| Hadoop Ecosystem Tools | - Workflow and processing frameworks - Sqoop and data ingestion |
Hortonworks-Certified-Apache-Hadoop-2.0-Developer(Pig and Hive Developer) Sample Questions:
Examine the following Pig commands:
Which one of the following statements is true?
- A. The SAMPLE command generates an "unexpected symbol" error
- B. A random sample of approximately 20% of the data will be output
- C. Each MapReduce task will terminate after executing for 0.2 minutes
- D. The reducers will only output the first 20% of the data passed from the mappers
Correct Answer: B 🗳️
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 if the next value is the same as the previous value, or
a new Writable object otherwise. - B. It returns a reference to a Writable object. The API leaves unspecified whether this is a reused object
or a new object. - C. It returns a reference to a Writable object from an object pool.
- D. It returns a reference to a different Writable object time.
- E. It returns a reference to the same Writable object each time, but populated with different data.
Correct Answer: E 🗳️
Review the following data and Pig code.
M,38,95111 F,29,95060 F,45,95192 M,62,95102 F,56,95102
A = LOAD 'data' USING PigStorage('.') as (gender:Chararray, age:int,
zlp:chararray);
B = FOREACH A GENERATE age;
Which one of the following commands would save the results of B to a folder in hdfs named myoutput?
- A. DUMP B INTO 'myoutput';
- B. DUMP B using PigStorage('myoutput');
- C. STORE A INTO 'myoutput' USING PigStorage(',');
- D. STORE B INTO 'myoutput';
Correct Answer: D 🗳️
Which HDFS command displays the contents of the file x in the user's HDFS home directory?
- A. hadoop fs -Is x
- B. hdfs fs -get x
- C. hadoop fs -cat x
- D. hadoop fs -cp x
Correct Answer: C 🗳️
For each intermediate key, each reducer task can emit:
- A. As many final key-value pairs as desired, as long as all the keys have the same type and all the values
have the same type. - B. One final key-value pair per key; no restrictions on the type.
- C. One final key-value pair per value associated with the key; no restrictions on the type.
- D. As many final key-value pairs as desired, but they must have the same type as the intermediate
key-value pairs. - E. As many final key-value pairs as desired. There are no restrictions on the types of those key-value
pairs (i.e., they can be heterogeneous).
Correct Answer: A 🗳️
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