Multiple Choice about Hadoop/MapReduce/Cloud Computing.

Which of the following statements are True ? Select multiple correct answers. If one of the Map or Reduce tasks fails, the whole job will fail. Hadoop attempts to launch Map tasks depending on the location of input data. Namenode is responsible for scheduling MapReduce tasks. Increasing HDFS replication factor may improve data locality for MapReduce jobs. Having lots of small files in HDFS is a good idea if the Namenode has small memory capacity. HDFS replica placement does not have any impact on Hadoop job performance. Hadoop's heartbeat protocol plays an important role in achieving fault tolerance