Tip 1 : While solving the questions never see the answer at least try for an hour then see the logic (I mean Algorithm) then try on your own still it's not solved then see the solution code.
Tip 2 : According to me it's not important how many programmes did you solved important is how deeply understood the every programme while solving.

Tip 1 : Read the Job description highlight the words which related to it for an example skills , experience and projects.
Tip 2 : Have some good projects (or) Internship it will definitely increase the chances of getting an interview.