I shave every day, but my beard stays the same. What am I?

What am I?

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

Take one out and scratch my head, I am now black but once was red. What am I?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

If your uncle’s sister is not your aunt, what relation is she to you?

I am an eight letter word and I am a computer terminology.
The second, third and fourth letters make an animal.
The fourth, fifth, sixth, seventh and eighth letters make a weapon.
The first, second, third and fourth letters can be taken as an outcome of any exam.
The fifth, sixth, seventh and eighth letter combine to form a high end typing software.

Can you tell who am I ?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

You see me once in June, twice in November, and not at all in May. What am I?