MathWorks Interview Question

1.HR round(online video recorded)-15 mins 2.Technical Phone Interview(Math,C/C++,Programming Concepts,Control Systems)-1 hour 3.On-site interview(Math,C/C++,Programming Concepts,Control Systems)-4 rounds 9 am - 2 pm Programming Concepts 1.Given a random array of numbers.How do you sort them?Select any sorting algorithm and write the pseudo code.(C) I implemented Merge Sort with merge subroutine I forgot base case ,I added later 2.1/8th of a circle.(NS) I gave semi optimum solution.