Amazon goes to great lengths to ensure that they are hiring the right people.

We sifted through hundreds of Glassdoor reviews to find some of the company's toughest interview questions.

Questions about employee behavior and past performance were asked most frequently inside the interview rooms.

Amazon goes to great lengths to ensure that they are hiring the right people.

"I'd rather interview 50 people and not hire anyone than hire the wrong person," CEO Jeff Bezos once said.

In fact, Bezos used to interview every single applicant to ensure that the right people were tasked with moving his company forward.

So it should come as no surprise that aspiring Amazon employees have to answer several difficult interview questions to find out if they have what it takes to be hired with the top tech company.

Business Insider sifted through hundreds of Glassdoor interview reviews and found 21 of the toughest questions that Amazon has asked its candidates in the past year.