Cloudera Certified Developer for Apache Hadoop 認定 CCD-333 試験問題:

1. The NameNode uses RAM for the following purpose:

A) To store filenames, list of blocks and other meta information.
B) To manage distributed read and write locks on files in HDFS.
C) To store the edits log that keeps track of changes in HDFS.
D) To store the contents of files in HDFS.

2. Workflows expressed in Oozie can contain:

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

3. 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) Five
D) Six
E) One
F) Four

4. 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) Reducer <Text, Text, IntWritable, IntWritable>
B) Reducer <Text, IntWritable, Text, IntWritable>
C) Mapper <Text, IntWritable, Text, IntWritable>
D) Combiner <Text, Text, IntWritable, IntWritable>
E) Combiner <Text, IntWritable, Text, IntWritable>

5. You need to import a portion of a relational database every day as files to HDFS, and generate Java classes to Interact with your imported data. Which of the following tools should you use to accomplish this?

A) Sqoop
B) Flume
C) Hive
D) Pig
E) fuse-dfs
F) Hue
G) Oozie

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