EMERGING TRENDS IN SOFTWARE ENGINEERING
CLOUD COMPUTING
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
archives
|
|
|
files
|
|
|
task
|
|
|
None of the mentioned
|
Detailed explanation-1: -Which of the following class provides a subset of features provided by the Unix/GNU Sort? Explanation: Hadoop has a library class, KeyFieldBasedComparator, that is useful for many applications.
Detailed explanation-2: -A MapReduce job usually splits the input data-set into independent chunks which are processed by the map tasks in a completely parallel manner. The framework sorts the outputs of the maps, which are then input to the reduce tasks.
Detailed explanation-3: -Mapper and Reducer implementations can use the to report progress or just indicate that they are alive. Explanation: Reporter is a facility for MapReduce applications to report progress, set application-level status messages and update Counters.