Cloudera CCD-333 : Cloudera Certified Developer for Apache Hadoop

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Cloudera Certified Developer for Apache Hadoop Sample Questions:

1. All keys used for intermediate output from mappers must do which of the following:

A) Implement WritableComparable
B) Be compressed using a splittable compression algorithm.
C) Be a subclass of Filelnput-Format
D) Override isSplitable
E) Use a comparator for speedy sorting

2. Workflows expressed in Oozie can contain:

A) Iterative repetition of MapReduce jobs until a desired answer or state is reached.
B) Sequences of MapReduce jobs only; no Pig or Hive tasks or jobs. These MapReduce sequences can be combined with forks and path joins.
C) Sequences of MapReduce and Pig jobs. These are limited to linear sequences of actions with exception handlers but no forks.
D) Sequences of MapReduce and Pig. These sequences can be combined with other actions including forks, decision points, and path joins.

3. Given a Mapper, Reducer, and Driver class packaged into a jar, which is the correct way of submitting the job to the cluster?

A) hadoop jar class MyJar.jar MyDriverClass inputdir outputdir
B) jar MyJar.jar MyDriverClass inputdir outputdir
C) hadoop jar MyJar.jar MyDriverClass inputdir outputdir
D) jar MyJar.jar

4. Which of the Following best describes the lifecycle of a Mapper?

A) The JobTracker calls the FastTracker's configure () method, then its map () method and finally its closer ()
B) The TaskTracker spawns a new Mapper to process each key-value pair.
C) The TaskTracker spawns a new Mapper to process all records in a single input split.
D) The JobTracker spawns a new Mapper to process all records in a single file.

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

Solutions: