Received a phone call for interview scheduling after submitting an online application.

Maths:

1. What is the Null Space of a matrix?
2. Calculate the inverse of [3 2; 1 1].
3. Calculate the Eigen Value(s) of [3 -1; 1 5].
4. Solve for y(x); dy/dx = cos x / 2x.
5. Solve the above for the boundary condition: y(0) = 1.
6. Lim x→0 sin x / x; Find the limits.

Signal Processing:

• Same questions as mentioned on the website.

• Extra questions are as follows:

  • Y(n) = 0.2 y(n-1) + 2 x(m); Which filter will you use?
  • h(n) = 1.2301 x 10^3; Which filter will you use?
  • Concept of Cross-correlation
  • Concept of Z-transform
  • Difference between Fourier Series and Fourier Transform
  • Concept of LTI – Linear Time-Invariant system theory

C-Programming:

1. Concept of Global variables and Local variables?
2. Typedef
3. Const and #define
4. "stdio.h" and (stdio.h)
5. Pointers
6. Null Pointer
7. Other similar questions in the list on the website.

Matlab Programming:

1. Concatenation execution, both using commands and without using commands.
2. Similar questions as mentioned in the list.