I have teeth but i don't bite. Who Am I ?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

What is at the end of a rainbow?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

What runs around the whole yard without moving?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

What do you answer even though it never asks you questions?