punctuation '?' or '.'

A question mark:

• !

• .

• ,

• ?

A full-stop:

• !

• .

• ,

• ?

An asking sentence ends with a:

• comma.

• full-stop.

• question mark.

A telling sentence ends with a :

• comma.

• full-stop.

• question mark.

Which sentence is correct?

• Do you like that class.

• It is my favourite class?

• When did you go to that class?

Why is this sentence not correct?

The exam is so easy?

• There should not be a comma after 27.

• There should be a full-stop at the end.

• There should be a comma before to.

Choose the correct punctuation to end this sentence:

Where are you going ______

• ,

• .

• ?