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Cloudera CCD-333 Exam Syllabus Topics:

Cloudera Certified Developer for Apache Hadoop Sample Questions:

1. You are running a job that will process a single InputSplit on a cluster which has no other jobs currently running. Each node has an equal number of open Map slots. On which node will Hadoop first attempt to run the Map task?

A) The node on which this InputSplit is stored
B) The node with the most memory
C) The node with the lowest system load
D) The node with the most free local disk space

2. Which of the following best describes the workings of TextInputFormat?

A) Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReaders of both splits containing the broken line.
B) Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReader of the split that contains the beginning of the broken line.
C) Input file splits may cross line breaks. A line that crosses file splits is read by the RecordReader of the split that contains the end of the broken line.
D) Input file splits may cross line breaks. A line that crosses tile splits is ignored.
E) The input file is split exactly at the line breaks, so each Record Reader will read a series of complete lines.

3. What is the standard configuration of slave nodes in a Hadoop cluster?

A) Each slave node runs a TaskTracker and a DataNode daemon.
B) Each slave node runs a DataNode daemon, but only a fraction of the slave nodes run TaskTrackers.
C) Each slave node runs a JobTracker and a DataNode daemon.
D) Each slave node runs a TaskTracker, but only a fraction of the slave nodes run DataNode daemons.
E) Each slave node either runs a TaskTracker or a DataNode daemon, but not both.

4. Given a directory of files with the following structure: line number, tab character, string:
Example:
1.abialkjfjkaoasdfjksdlkjhqweroij
2.kadf jhuwqounahagtnbvaswslmnbfgy
3.kjfteiomndscxeqalkzhtopedkfslkj
You want to send each line as one record to your Mapper. Which InputFormat would you use to complete the line: setInputFormat (________.class);

A) BDBInputFormat
B) SequenceFileInputFormat
C) SequenceFileAsTextInputFormat
D) KeyValueTextInputFormat

5. You use the hadoop fs -put command to write a 300 MB file using an HDFS block size of 64 MB. Just after this command has finished writing 200 MB of this file, what would another user see when trying to access this file?

A) They would see the content of the file through the last completed block.
B) They would see no content until the whole file is written and closed.
C) They would see Hadoop throw an concurrentFileAccessException when they try to access this file.
D) They would see the current state of the file, up to the last bit written by the command.

Solutions: