Question

Statement 1: Map operation consists of transforming one set of key-value pairs to another.
Statement 2: Each reducer groups the results of the map step using the same key.

Answer 1

Statement -1 is true while statement -2 is false. In map oprtation, elements are converted from one form to another, the input and the output key values can be different from each other and input values are converted from zero to many values of output. Map reduce, the input values are subjected to reduce operation.

Answer 2

Answer:

Both statements are true.

Explanation: