EMERGING TRENDS IN COMPUTING
CLOUD COMPUTING
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
____ maps input key/value pairs to a set of intermediate key/value pairs.
|
|
Mapper
|
|
|
Reducer
|
|
|
Both Mapper and Reducer
|
|
|
None of the mentioned
|
Explanation:
Detailed explanation-1: -MapReduce Key value pair generation in Hadoop Key-value pair in MapReduce is generated as follows: InputSplit – It is the logical representation of data which InputFormat generates. In MapReduce program it describes a unit of work that contains a single map task. RecordReader – It communicates with the InputSplit.
Detailed explanation-2: -Intermediate Keys − They key-value pairs generated by the mapper are known as intermediate keys. Combiner − A combiner is a type of local Reducer that groups similar data from the map phase into identifiable sets.
There is 1 question to complete.