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最新的 CCDH CCD-410 免費考試真題:

1. You have user profile records in your OLPT database, that you want to join with web logs you have already ingested into the Hadoop file system. How will you obtain these user records?

A) Ingest with Flume agents
B) HDFS command
C) Pig LOAD command
D) Ingest with Hadoop Streaming
E) Hive LOAD DATA command
F) Sqoop import

2. Table metadata in Hive is:

A) Stored as metadata on the NameNode.
B) Stored in the Metastore.
C) Stored in ZooKeeper.
D) Stored along with the data in HDFS.

3. All keys used for intermediate output from mappers must:

A) Implement WritableComparable.
B) Implement a splittable compression algorithm.
C) Override isSplitable.
D) Be a subclass of FileInputFormat.
E) Implement a comparator for speedy sorting.

4. You want to populate an associative array in order to perform a map-side join. You've decided to put this information in a text file, place that file into the DistributedCache and read it in your Mapper before any records are processed.
Indentify which method in the Mapper you should use to implement code for reading the file and populating the associative array?

A) map
B) configure
C) init
D) combine

5. For each input key-value pair, mappers can emit:

A) One intermediate key-value pair, of a different type.
B) As many intermediate key-value pairs as designed, as long as all the keys have the same types and all the values have the same type.
C) As many intermediate key-value pairs as designed, but they cannot be of the same type as the input key-value pair.
D) As many intermediate key-value pairs as designed. There are no restrictions on the types of those key-value pairs (i.e., they can be heterogeneous).
E) One intermediate key-value pair, but of the same type.

問題與答案：