How i can know is the person next to me is an ENTJ?

So far i met different mbti personality but not entj, and i want to know how i can know one, and i also interesting to know what do u guys like and hate, and how do u show to the person that u like them or dislike them?

And also what do u think about ENTP as partner, because my friend keep mentioning that i would be great with you.