The interview process was smooth and easy. They mainly focused on basic concepts and also the depth of our understanding.

The first round was a telephonic HR interview. After this, they sent a MathWorks HackerRank programming challenge invitation, which was the second round. The third round was a technical interview (telephonic).

Questions were asked from C++, Maths, MATLAB, and Control Systems.

Maths

• Rank of a 3x3 matrix.
• How to make a non-invertible matrix a singular matrix.
• Problem using LMV theorem.
• Limits.

MATLAB

• Program using element-wise multiplication operator.
• Program using FIND operator.
• Optimization of MATLAB code.

C++

• Advantages of OOP.
• Polymorphism.
• Why do we use pointers?
• NULL pointers.
• Call by value and call by reference.
• Program on destructors.
• Virtual destructors.
• Private constructors.
• Find duplicate elements in an integer array.

Control Systems

• What is a PID controller?
• Why is negative feedback preferred?
• Where do we use positive feedback?