MapReduce Cloud Computing Question:
Download Questions PDF

Can you explain what you understand by speculative execution?

Cloud Computing - MapReduce Interview Question
Cloud Computing - MapReduce Interview Question

Answer:

Mapreduce works on the basis of large number of computers connected via a network also known as node. In a large network there is always a possibility that a system may not perform as quickly as others. This results in a task being delayed. By speculative execution this can be avoided as multiple instances of the same map are run on different systems.

Download Cloud Computing - MapReduce Interview Questions And Answers PDF

Previous QuestionNext Question
What is combiners?When do reducers play their role in a mapreduce task?