Finding the perfect job is tough and it can be a disappointment to realize that you might not have all the requirements down. But you don't have to check off every single box to land the perfect job, you just need to convince the hiring managers that you are determined to succeed in it.

Wharton organizational psychologist Adam Grant recently told CNBC's "Squawk Box" about an 'amazing' cover letter he read a few years ago, where the applicant did not have all the qualifications listed. Instead of ignoring her weaknesses, she addressed the elephant in the room by admitting that she was "not quite the fit."