I am seriously preparing for big companies(FANG) from the past 7 days.... In this process i am learning complex things linked lists, trees and grpahs day to day......but somewhere i am having fear in my mind...... after all this preparation and hardwork......what if i dont place in big companies? Instead if i learn some programming languages and frameworks...... i can easily get placed in middle tier comapnies.....can someone please give me guidance and motivation!