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CSE431: Distributed Systems Assignment #4 Solved

General Instructions:

•    The aim of the assignment is to get familiar with Erlang (https://www.erlang.org/).

•    The assignment has to be done using Erlang only.

•    Strict actions would be taken against anyone found involved in any kind of plagiarism either from the internet or from other students.

•    Submission instructions given at the end of the assignment must be strictly followed. Since the evaluation will be automated, any deviation will result in loss of marks.

Submission Instructions:

•    The program will be given two arguments, path to an input file and an output file from which your program will obtain the input and output the result into respectively.

•    The submission is expected to be a <RollNumber.zip file containing a directory with the same name as your roll number that holds the following files:

–    A program file for each of the mentioned problems with the name: <RollNumber <ProblemNumber.erl. (eg. 20161215 1.erl)

–    A brief report describing and analyzing your solution as: README.md

(1) Write a program to pass an integer token value around all processes in a ring-like fashion, and make sure that it does not have a deadlock.

Input Format:

Input contains two space-separated integers denoting the number of processes and the token value respectively. Output Format:

Check sample output.

Sample Input:

5 1

Sample Output:

Process 1 received token 1 from process 0.

Process 2 received token 1 from process 1.

Process 3 received token 1 from process 2.

Process 4 received token 1 from process 3. Process 0 received token 1 from process 4.

(2) Parallel Merge Sort: Given an array of numbers, your task is to return the array in sorted order by implementing parallel merge sort.

Input Format:

The first and the only line of input contains an array of integers.

Output Format:

Output your answer as a space-separated array. Sample Input:

7 -1 4 9 -8 0 6 Sample Output:

-8 -1 0 4 6 7 9

1

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