First round was a hr behavioral round. They asked me questions like, 1) How do you resolve a conflict in your team? 2) have you even been a team leader ?and similar kind of questions. Second round of technical, I had chosen digital signal processing. Math questions. 1) What is is singular matrix? 2) what is a cross correlation? 3) what is random process? 4) what is eigen value of this matrix? 5) what is eigen vector of this matrix? 6) inverse of a matrix for a 2*2 matrix? 7) what is a symmetrix matrix? 8) what is dy/dx? 9) what is partial differentiaion? 10) what is diff between differential eqn and partial diff eqn? 11) Given acceleration find velocity? 12) what is auto correlation? 13) what is a null matrix? 14) how do you find a rank of a matrix? 15) what is integration? 16) what is differentiation? 17) what is derivative? 18) relation between differentiation and integration? 19) gave me sums on partial differential equation? Java 1) What is diff between jre and jdk? 2) what is use of string and string buffer? 3) int and integer? 4) java application vs java applet? 5) break and continue. 6) Pointers? 7) why java is machine independent? 8) call by value and call by reference? 9) what does java use call by value or reference? 10) what are wrapper classes? 11) what is a abstract class? 12) what is a final keyword do? Signal Processing 1) Aliasing? 2) Z transform? 3) Fourier transform? 4) Convolution? 5) difference between convolution and correlation? 6) what are anti- aliasing filters? 7) impulse response? 8) what is a iir and fir? 9) is this iir or fir? hey gave me 4 sums on the same 10) what are causal systems? 11) what is a BIBO system? bounded system? 12) gave me a question and asked me whether it is a stable/unstable? why? 13) in a graph? tell me where does a stable system lies and unstable lies? Matlab 1) What is a.*b and a*b? 2) Script vs function 3) workspace of a script vs workspace of a function? 4) plot(x,y,'o'); what does that mean? 5) how to suppress comments. 6) how to plot position vs time and position vs distance on same graph? 7) how do you concatenate strings? 8) how do you find the inverse of a matrix? 9) gave a problem and asked can you put 2 x axis or something of that sort? wasn't clear about the question. 10) how to find the number of elements in matlab? "numel" function The interview went for 55 minutes. I I am sure with the rest of the questions. the total number of questions were between 80-100.