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Hortonworks Data Platform Certified Developer Exam Dumps

HDPCD Exam Format | Course Contents | Course Outline | Exam Syllabus | Exam Objectives

Test Detail:
The Hortonworks Data Platform Certified Developer (HDPCD) exam is designed to assess a candidate's knowledge and skills in developing applications using Hortonworks Data Platform (HDP). Here is a detailed description of the test, including the number of questions and time allocation, course outline, exam objectives, and exam syllabus.

Number of Questions and Time:
The HDPCD exam typically consists of a set of hands-on coding exercises that assess a candidate's ability to develop applications using HDP components. The number of exercises may vary, but candidates are usually given a time limit of 2 to 4 hours to complete the exam. The specific number of questions and time allocation may vary depending on the exam version and administration.

Course Outline:
The course outline for the HDPCD exam covers various aspects of developing applications on the Hortonworks Data Platform. The outline may include the following key areas:

1. Hadoop Fundamentals:
- Understanding Hadoop architecture and components
- Working with Hadoop Distributed File System (HDFS)
- Managing and processing data using MapReduce

2. Data Ingestion and Processing:
- Importing and exporting data to/from HDP
- Using Apache Hive for data querying and analysis
- Implementing data transformations using Apache Pig

3. Data Storage and Management:
- Working with Apache HBase for NoSQL database operations
- Managing data using Apache Oozie workflows
- Implementing data partitioning and compression techniques

4. Data Analysis and Visualization:
- Performing data analysis using Apache Spark
- Visualizing data using Apache Zeppelin or Apache Superset
- Utilizing machine learning algorithms with Apache Spark MLlib

Exam Objectives:
The objectives of the HDPCD exam are to evaluate candidates' proficiency in developing applications on the Hortonworks Data Platform. The exam aims to assess the following key skills:

1. Understanding Hadoop fundamentals and its ecosystem components.
2. Implementing data ingestion and processing using tools like Hive and Pig.
3. Managing and analyzing data using HBase, Oozie, and Spark.
4. Demonstrating proficiency in coding with Hadoop APIs and frameworks.
5. Applying best practices for data storage, management, and analysis.

Exam Syllabus:
The exam syllabus for the HDPCD exam typically includes a set of hands-on coding exercises that test candidates' ability to solve real-world problems using HDP components. The exercises may cover topics such as data ingestion, data processing, data storage, data analysis, and data visualization. Candidates should be familiar with the syntax and usage of Hadoop APIs and tools, including MapReduce, Hive, Pig, HBase, Oozie, and Spark.

Candidates should refer to the official HDPCD exam documentation, study materials, and resources provided by Hortonworks or authorized training partners for accurate and up-to-date information on the specific topics and content covered in the exam. It is recommended to allocate sufficient time for exam preparation, including hands-on practice with HDP components and solving coding exercises.

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HDPCD PDF Sample Questions

HDPCD Sample Questions

Hortonworks
HDPCD
Hortonworks Data Platform Certified Developer
https://killexams.com/pass4sure/exam-detail/HDPCD
QUESTION: 97
You write MapReduce job to process 100 files in HDFS. Your MapReduce algorithm
uses TextInputFormat: the mapper applies a regular expression over input values and
emits key- values pairs with the key consisting of the matching text, and the value
containing the filename and byte offset. Determine the difference between setting the
number of reduces to one and settings the number of reducers to zero.
A. There is no difference in output between the two settings.
B. With zero reducers, no reducer runs and the job throws an exception. With one
reducer, instances of matching patterns are stored in a single file on HDFS.
C. With zero reducers, all instances of matching patterns are gathered together in one
file on HDFS. With one reducer, instances of matching patterns are stored in multiple
files on HDFS.
D. With zero reducers, instances of matching patterns are stored in multiple files on
HDFS. With one reducer, all instances of matching patterns are gathered together in
one file on HDFS.
Answer: D
Explanation:
* It is legal to set the number of reduce-tasks to zero if no reduction is desired.
In this case the outputs of the map-tasks go directly to the FileSystem, into the output
path set by setOutputPath(Path). The framework does not sort the map-outputs before
writing them out to the FileSystem.
* Often, you may want to process input data using a map function only. To do this,
simply set mapreduce.job.reduces to zero. The MapReduce framework will not create
any reducer tasks. Rather, the outputs of the mapper tasks will be the final output of
the job.
Note: Reduce
In this phase the reduce(WritableComparable, Iterator, OutputCollector, Reporter)
method is called for each pair in the grouped inputs.
The output of the reduce task is typically written to the FileSystem via
OutputCollector.collect(WritableComparable, Writable).
Applications can use the Reporter to report progress, set application-level status
messages and update Counters, or just indicate that they are alive.
The output of the Reducer is not sorted.
QUESTION: 98
Indentify the utility that allows you to create and run MapReduce jobs with any
executable or script as the mapper and/or the reducer?
51
A. Oozie
B. Sqoop
C. Flume
D. Hadoop Streaming
E. mapred
Answer: D
Explanation:
Hadoop streaming is a utility that comes with the Hadoop distribution. The utility
allows you to create and run Map/Reduce jobs with any executable or script as the
mapper and/or the reducer.
Reference:
http://hadoop.apache.org/common/docs/r0.20.1/streaming.html (Hadoop Streaming,
second sentence)
QUESTION: 99
Which one of the following statements is true about a Hive-managed table?
A. Records can only be added to the table using the Hive INSERT command.
B. When the table is dropped, the underlying folder in HDFS is deleted.
C. Hive dynamically defines the schema of the table based on the FROM clause of a
SELECT query.
D. Hive dynamically defines the schema of the table based on the format of the
underlying data.
Answer: B
QUESTION: 100
You need to move a file titled �weblogs� into HDFS. When you try to copy the file,
you can�t. You know you have ample space on your DataNodes. Which action should
you take to relieve this situation and store more files in HDFS?
A. Increase the block size on all current files in HDFS.
B. Increase the block size on your remaining files.
C. Decrease the block size on your remaining files.
D. Increase the amount of memory for the NameNode.
E. Increase the number of disks (or size) for the NameNode.
52
F. Decrease the block size on all current files in HDFS.
Answer: C
QUESTION: 101
Which process describes the lifecycle of a Mapper?
A. The JobTracker calls the TaskTracker�s configure () method, then its map ()
method and finally its close () method.
B. The TaskTracker spawns a new Mapper to process all records in a single input
split.
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.
Answer: B
Explanation:
For each map instance that runs, the TaskTracker creates a new instance of your
mapper.
Note:
* The Mapper is responsible for processing Key/Value pairs obtained from the
InputFormat. The mapper may perform a number of Extraction and Transformation
functions on the Key/Value pair before ultimately outputting none, one or many
Key/Value pairs of the same, or different Key/Value type.
* With the new Hadoop API, mappers extend the
org.apache.hadoop.mapreduce.Mapper class. This class defines an 'Identity' map
function by default - every input Key/Value pair obtained from the InputFormat is
written out.
Examining the run() method, we can see the lifecycle of the mapper:
/**
* Expert users can override this method for more complete control over the
* execution of the Mapper.
* @param context
* @throws IOException
*/
public void run(Context context) throws IOException, InterruptedException {
setup(context);
while (context.nextKeyValue()) {
map(context.getCurrentKey(), context.getCurrentValue(), context);
}
cleanup(context);
53
}
setup(Context) - Perform any setup for the mapper. The default implementation is a
no-op method.
map(Key, Value, Context) - Perform a map operation in the given Key / Value pair.
The default implementation calls Context.write(Key, Value)
cleanup(Context) - Perform any cleanup for the mapper. The default implementation
is a no-op method.
Reference:
Hadoop/MapReduce/Mapper
QUESTION: 102
Which one of the following files is required in every Oozie Workflow application?
A. job.properties
B. Config-default.xml
C. Workflow.xml
D. Oozie.xml
Answer: C
QUESTION: 103
Which one of the following statements is FALSE regarding the communication
between DataNodes and a federation of NameNodes in Hadoop 2.2?
A. Each DataNode receives commands from one designated master NameNode.
B. DataNodes send periodic heartbeats to all the NameNodes.
C. Each DataNode registers with all the NameNodes.
D. DataNodes send periodic block reports to all the NameNodes.
Answer: A
QUESTION: 104
In a MapReduce job with 500 map tasks, how many map task attempts will there be?
54
A. It depends on the number of reduces in the job.
B. Between 500 and 1000.
C. At most 500.
D. At least 500.
E. Exactly 500.
Answer: D
Explanation:
From Cloudera Training Course:
Task attempt is a particular instance of an attempt to execute a task
� There will be at least as many task attempts as there are tasks
� If a task attempt fails, another will be started by the JobTracker
� Speculative execution can also result in more task attempts than completed tasks
QUESTION: 105
Review the following 'data' file and Pig code.
Which one of the following statements is true?
A. The Output Of the DUMP D command IS (M,{(M,62.95102),(M,38,95111)})
B. The output of the dump d command is (M, {(38,95in),(62,95i02)})
C. The code executes successfully but there is not output because the D relation is
empty
D. The code does not execute successfully because D is not a valid relation
Answer: A
QUESTION: 106
Which one of the following is NOT a valid Oozie action?
55
A. mapreduce
B. pig
C. hive
D. mrunit
Answer: D
QUESTION: 107
Examine the following Hive statements:
Assuming the statements above execute successfully, which one of the following
statements is true?
A. Each reducer generates a file sorted by age
B. The SORT BY command causes only one reducer to be used
C. The output of each reducer is only the age column
D. The output is guaranteed to be a single file with all the data sorted by age
Answer: A
QUESTION: 108
Your client application submits a MapReduce job to your Hadoop cluster. Identify the
Hadoop daemon on which the Hadoop framework will look for an available slot
schedule a MapReduce operation.
A. TaskTracker
B. NameNode
C. DataNode
D. JobTracker
E. Secondary NameNode
56
Answer: D
Explanation:
JobTracker is the daemon service for submitting and tracking MapReduce jobs in
Hadoop. There is only One Job Tracker process run on any hadoop cluster. Job
Tracker runs on its own JVM process. In a typical production cluster its run on a
separate machine. Each slave node is configured with job tracker node location. The
JobTracker is single point of failure for the Hadoop MapReduce service. If it goes
down, all running jobs are halted. JobTracker in Hadoop performs following
actions(from Hadoop Wiki:)
Client applications submit jobs to the Job tracker.
The JobTracker talks to the NameNode to determine the location of the data
The JobTracker locates TaskTracker nodes with available slots at or near the data The
JobTracker submits the work to the chosen TaskTracker nodes.
The TaskTracker nodes are monitored. If they do not submit heartbeat signals often
enough, they are deemed to have failed and the work is scheduled on a different
TaskTracker.
A TaskTracker will notify the JobTracker when a task fails. The JobTracker decides
what to do then: it may resubmit the job elsewhere, it may mark that specific record
as something to avoid, and it may may even blacklist the TaskTracker as unreliable.
When the work is completed, the JobTracker updates its status. Client applications
can poll the JobTracker for information.
Reference:
24 Interview Questions & Answers for Hadoop MapReduce developers, What is
a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop
Cluster?
57
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HDPCD Certified exam syllabus

HDPCD Certified exam syllabus :: Article Creator

Use A Syllabus

Would you pay lots of dollars for a class and invest tons of of hours if you didn’t recognize what material became going to be coated, or when the quizzes and tests were, and what changed into considered a passing grade? Most americans wouldn’t, yet day by day a whole bunch of americans almost try this after they show up for flight practicing and it's performed with out the advantage of a syllabus.

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Is a syllabus required for flight practicing? The FAA does not mandate using a syllabus under half sixty one. besides the fact that children,under part 141, pilot faculties are required to use a structured training application that comprises a syllabus. The aspects and expertise requirements of materials sixty one and 141 are similar—the journey requirements are a little distinct, however, as a private pilot applicant who has knowledgeable beneath half 141 can qualify to take the check experience at 35 hours, as compared to 40 hours beneath half 61.

Is a syllabus positive for practicing? sure, it is. It’s like a highway map for both teacher and learner, displaying you where you're heading in practising and what milestones await. below part sixty one, the CFI can create their own syllabus using the FARs and the requisites for the certificate or ranking they are teaching, or they should buy an off-the-shelf product like a syllabus from Jeppesen, Cessna, Sporty’s, or King faculties.

Ostensibly, these syllabi were designed to get the applicant via practicing in the minimal period of time. They are often used partially 141 courses. therefore, the syllabus shows the minimal time that should still be spent on each and every lesson and the aspects that need to be coated. below half 141, the syllabus needs to be strictly followed, and this lack of flexibility could make it intricate to regulate for climate, scholar and/or scientific certification delays, and mechanical considerations.

there's nothing that says a CFI can’t take a syllabus that became designed for half 141 instruction and apply it all over part 61 practising. certainly, many CFIs who knowledgeable at 141 classes however went on to teach beneath 61 frequently use the syllabus they informed with at their region of employment; however, they don’t ought to adhere to the half 141 time constraints or sequence requirements.

CFIs who create their own syllabus can alter for towered vs. nontowered airports, airspace, equipment attainable, weather, their instructing vogue, and the advantage acquisition fashion of novices. frequently these syllabi are adjusted as the instructor’s event adjustments.

Rod Machado, flight instructor, aviation writer, and humorist, created a syllabus that dovetails into his popular on-line floor school. “a fine syllabus covers what is indispensable and no needless issues,” says Machado.“A flight teacher can seem at the distinct syllabi available and locate the one it really is most advantageous and put off what isn't for the training they're proposing. The syllabus offers the CFI information, however they shouldn’t be the usage of it to just determine the boxes. They need to tailor the lesson to the learner and not be a slave to the syllabus.”

the style a syllabus gifts the tips is essential, says Machado, who advocates the constructing block strategy, which organizes practising that starts with the most basic tasks—akin to takeoffs, climbs, turns, and descents—and builds on them as the learner’s ability and adventure develop. “The syllabus also must also be time ‘do-in a position,’ as the size of the lessons should make feel and be purposeful. they can’t be too lengthy.”

can you think about running into a university lecture room and the instructor asking, “What we could do today?” A variation of that occurs all of the time when a syllabus is not used, says Michael McCurdy, proprietor and CEO of CHS Flight school at Charleston overseas Airport (KCHS) in South Carolina.

“If the CFI changed into not trained the use of a syllabus, there's a pretty good possibility they won’t use it to teach their beginners. that you would be able to tell this has happened when the CFI greets the learner via asking, ‘What do you are looking to do these days?’ and the customer replies, ‘You’re the instructor, shouldn’t you be aware of what we’re going to do?’”

McCurdy’s faculty operates beneath half 61 with a syllabus created in-apartment, constructed around the usage of the Redbird FMX as a tactics trainer. The beginners benefit talents on the floor the place the instructor can control the climate, then flow out to the aircraft—and are more advantageous organized. This leads to quick growth and successful determine rides.

Flight instruction is a 2d profession for McCurdy—his first turned into law enforcement. He has been a CFI for two decades and says the beginners—no longer the instructors—get the most out of the syllabus.

“when you are equipped and have journey, probably you, the CFI, don’t want a syllabus—however the beginners appreciate using one in order that they comprehend where they're at and what's down the highway for them.”

McCurdy’s college commonly picks up clients who had been practising in different places with out a syllabus and left because they didn’t suppose they have been making development. Some CFIs compare this to playing football and never knowing where the intention posts are.

“the lack of a syllabus all through my preliminary practicing resulted in uncertainty on my half about what turned into required and where i used to be in terms of progress,” remembers Karen Kalishek, chairman of the countrywide affiliation of Flight Instructors, a designated pilot examiner, and an airline transport pilot. “When my instructor went on holiday, the training with a alternative were mostly redundant for the reason that there had been no monitoring.”

“In nowadays’s ambiance with rapid turnover of CFIs—which makes it more likely that a learner will experience transition to yet another primary flight teacher—I highly advocate using a syllabus,” Kalishek continues. “it's a tool to tune growth, boost efficiency, store working towards greenbacks and guide good verbal exchange between the instructor and learner.

this article became initially posted within the March 2023 situation 935 of FLYING.

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