Talked with Mathworks during our Career Fair. Had a 20 min behavioral interview. Got a call back after 2 days to schedule a technical phone interview. Gave 1.5 weeks for preparation. The phone interview covers Math concepts(Differential equations, Partial diff, equations, linear algebra, probability) Signal Processing (Z transforms, cont. and disc time systems, stability etc) Programming concepts And C/C++/Java (I chose C). MATLAB questions. Asked following questions in the phone interview : 1) Math concepts : What is an integral? What is a derivative? Relation between two. What is the difference between definite and indefinite integral? If the limits are -inf to inf, is it a definite integral or an indefinite ? (Ans : Definite) What is a linear differential equation? What is a partial differential equation? Do a dot product of given two 3-D vectors. What is a singular matrix? What is a symmetric matrix ? What are eigen values and eigen vectors? What is the probability that you get 2 aces when you are dealt two cards? 2) Signal Processing: What is continuous time system? What is a discrete time system? How do you convert one to the other? What is an LTI system? What is causality? Relationship between Z transform and Fourier transform Z transform of a given impulse response? Is it casual? Given a Z transform, is it stable? Given an impluse response, is the system stable? What are random processes? What is a PSD? What does PSD of white noise look like? 3) Programming concepts and C What is local scope and global scope? What is # include ? Difference between using # include <stdio.h> and "stdio.h" What is a recursion? Give an example? How does it terminate? How does the system handle recursion calls? What is a malloc function? What is the difference between malloc and other memory allocation functions in C? 4) MATLAB : How do you preserve MATLAB settings across sessions? What is the difference between a script and a function? In terms of their workspace? What does A' do? How do you take transpose of a matrix in MATLAB? What is the difference between * and .* ? How do you take inverse of a Matrix in MATLAB?

There were three phases for recruiting procedures. The first stage was a brief and relaxing conversation, the second stage was about technical things and hiring manager asked several questions in the third stage.