Cloudera サンプル試験からの別の質問
Question 2
You need to write code to perform a complex calculation that takes several steps. You have decided to chain these jobs together and develop a custom composite class for the key that stores the results of intermediate calculations. Which interface must this key implement?
A. Writable
B. Transferable
C. CompositeSortable
D. WritableComparable
私はD. WritableComparableだと信じています。一般に、Hadoop Esco システムのデータ型について詳しく知るには、何を勉強する必要がありますか??