Is pole star is located by Ursa major constellation?

Yes. Pole Star is located by Ursa Major.

On a clear moonless sky during summer at 9.00 p.m. at the northern part of sky you can see Ursa Major. Imagine a straight line that passess through these stars and extend this line towards the northern side to a star that is not too bright. This is a Pole Star. This star does not move at all. Ursa Major moves east to west of this Pole Star.