1- Draw the workflow of MapReduce that count the number of students registered in each course.

Program Input: Courses registered by each student

Student ID =1, courses=3, database, programming, data structure

Student ID =2, courses =2, python, operating system

Student ID =3, courses =3, python, database, programming

Student ID =4, courses =4, data structure, programming, math, machine learning

Program output: Total number of students in each course

2- Consider A file containing the following text:

When working with serialized data, you must specify the characters. that separate values within and between the key-value pairs

Convert this file into one split of four records as key-value pairs.

3- Consider the size of job file is 4GB Compute the following:

a. Number of blocks if the size of each block is 128MB.

b. The size of each file if the job file broken into 20000 files.

c. The number of map tasks if each map contains 1000 file.

d. The number of tasks if each task contains 5 maps.

e. The total time of job if the task executes in 3 seconds.