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Cloudera CCD-333 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Data Formats and Storage | - Serialization formats
|
| Hadoop Ecosystem and Architecture | - YARN Resource Management
|
| Data Ingestion and Integration | - Sqoop
|
| Data Processing Tools | - Hive
|
| Workflow and Scheduling | - Oozie
|
| Data Processing with MapReduce | - Optimization and debugging
|
Cloudera Certified Developer for Apache Hadoop Sample Questions:
You have the following key value pairs as output from your Map task:
(The, 1)
(Fox, 1)
(Runs, 1)
(Faster, 1)
(Than, 1)
(The, 1)
(Dog, 1)
How many keys will be passed to the reducer?
- A. Three
- B. Two
- C. One
- D. Four
- E. Five
- F. Six
Correct Answer: F 🗳️
Explanation: Only visible for PassSureExam members. You can sign-up / login (it's free).
MapReduce is well-suited for all of the following applications EXCEPT? (Choose one):
- A. Online transaction processing (OLTP) for an e-commerce Website.
- B. Analysis of large amounts of Web logs (queries, clicks, etc.).
- C. Graph mining on a large social network (e.g., Facebook friends network).
- D. Text mining on a large collections of unstructured documents.
Correct Answer: A 🗳️
Explanation: Only visible for PassSureExam members. You can sign-up / login (it's free).
You are developing a combiner that takes as input Text keys, IntWritable values, and emits Text keys, Intwritable values. Which interface should your class implement?
- A. Combiner <Text, Text, IntWritable, IntWritable>
- B. Reducer <Text, IntWritable, Text, IntWritable>
- C. Combiner <Text, IntWritable, Text, IntWritable>
- D. Mapper <Text, IntWritable, Text, IntWritable>
- E. Reducer <Text, Text, IntWritable, IntWritable>
Correct Answer: C 🗳️
What is the difference between a failed task attempt and a killed task attempt?
- A. A failed task attempt is a task attempt that completed, but with an unexpected status value. A killed task attempt is a duplicate copy of a task attempt that was started as part of speculative execution.
- B. A failed task attempt is a task attempt that threw an unhandled exception. A killed task attempt is one that was terminated by the JobTracker.
- C. A failed task attempt is a task attempt that did not generate any key value pairs. A killed task attempt is a task attempt that threw an exception, and thus killed by the execution framework.
- D. A failed task attempt is a task attempt that threw a RuntimeException (i.e., the task fails). A killed task attempt is a task attempt that threw any other type of exception (e.g., IOException); the execution framework catches these exceptions and reports them as killed.
Correct Answer: A 🗳️
Explanation: Only visible for PassSureExam members. You can sign-up / login (it's free).
Which MapReduce daemon runs on each slave node and participates in job execution?
- A. NameNode
- B. JobTracker
- C. Secondary NameNode
- D. TaskTracker
Correct Answer: D 🗳️
Explanation: Only visible for PassSureExam members. You can sign-up / login (it's free).
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