Tip 1 : DSA is the key and the most important factor
Tip 2 : Prepare important core CS subjects
Tip 3 : You will edge over other people if you have good-level projects on your resume
Tip 1 : Have some really good projects on resume.
Tip 2 : Show case your thrive on CS
Design a keyboard, How does a keyboard work?
How OS context switch for interrupt
Tip 1 : He doesn't expect you to know all of these, he wants you to think of this as a problem and how would you solve it