Download Cloudera : CCD-333 Questions & Answers as PDF & Test Software
Updated: Aug 31, 2025
No. of Questions: 60 Questions & Answers with Testing Engine
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Cloudera Certified Developer for Apache Hadoop Sample Questions:
1. Which MapReduce daemon runs on each slave node and participates in job execution?
A) NameNode
B) TaskTracker
C) JobTracker
D) Secondary NameNode
2. Does the MapReduce programming model provide a way for reducers to communicate with each other?
A) Yes, reducers running on the same machine can communicate with each other through shared memory, but not reducers on different machines.
B) Yes, reducers can communicate with each other by dispatching intermediate key value pairs that get shuffled to another reduce
C) Yes, all reducers can communicate with each other by passing information through the jobconf object.
D) No, each reducer runs independently and in isolation.
3. Your Custer's HOFS block size is 64MB. You have a directory containing 100 plain text files, each of which Is 100MB in size. The InputFormat for your job is TextInputFormat. How many Mappers will run?
A) 100
B) 200
C) 640
D) 64
4. If you run the word count MapReduce program with m mappers and r reducers, how many output files will you get at the end of the job? And how many key-value pairs will there be in each file? Assume k is the number of unique words in the input files.
A) There will be m files, each with approximately k/m key-value pairs.
B) There will be r files, each with approximately k/r key-value pairs.
C) There will be r files, each with approximately k/m key-value pairs.
D) There will be r files, each with exactly k/r key-value pairs.
E) There will be m files, each with exactly k/m key value pairs.
5. What is the preferred way to pass a small number of configuration parameters to a mapper or reducer?
A) Using a plain text file via the Distributedcache, which each mapper or reducer reads.
B) As key-value pairs in the jobconf object.
C) Through a static variable in the MapReduce driver class (i.e., the class that submits the MapReduce job).
D) As a custom input key-value pair passed to each mapper or reducer.
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: D | Question # 3 Answer: B | Question # 4 Answer: D | Question # 5 Answer: B |
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