Just talked about how my work is related to this position . After this was asked to choose my area of interest from the programming languages etc., Most of the questions are from glassdoor but I feel every time there are two or three new questions on which they will decide the selection . Some of the questions were: 1. function handling 2. find the sampling frequency. 3. dot product, cross product. 4. Z transforms 5. ROC 6. Auto-correlation, Cross correlation, convolution definitions. 7. Rank of a matrix. 8. L'hospital rule . 9. Significance of a null pointer. 10. FIR vs IIR 11. structure vs Union 12. Nyquist sampling theorem. 13. typedef function . 14. difference in & and && in Matlab . 15. Mention one operator which is used as binary operator as well as unary operator. 16. how to represent a vector in matlab . 17. left inverse and right inverse of a matrix. 18. Inline function definition . 19. Recursive function examples. 20. what changes to be done to the code to make it run faster. 21. characteristic equation of a matrix. 22. how are Z transform and Fourier transform related. 23. how to concatenate a 3X3 matrix with a 4X3 Matrix. 24. Pass by value and pass by reference. 25. Malloc and Calloc. 26. Const int a vs define int a 27. How does a Spectral Power Density of a white noise look like? 28. Fourier series. 29. what does #include mean? 30. sinusoidal representation of fourier series importance.