MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -1 Answer. The explanation is: The default partitioner in Hadoop is the HashPartitioner which has a method called getPartition to partition.

Detailed explanation-2: -The Default Hadoop partitioner in Hadoop MapReduce is Hash Partitioner which computes a hash value for the key and assigns the partition based on this result.

Detailed explanation-3: -Partitioner. Partitioner partitions the key space. Partitioner controls the partitioning of the keys of the intermediate map-outputs. The key (or a subset of the key) is used to derive the partition, typically by a hash function.

Detailed explanation-4: -HashPartitioner is the default partitioner used by Spark.

Detailed explanation-5: -A partitioner partitions the key-value pairs of intermediate Map-outputs. It partitions the data using a user-defined condition, which works like a hash function. The total number of partitions is same as the number of Reducer tasks for the job.