Logic Riddles

Question: When the answer I give is yes, it is no, and when the answer I give is no, it is yes. What is the question?

Question: What is the connection between a cricket and a human?

Question: What goes up but never comes down?

Question: Which runs faster, hot or cold water?

Question: There are 3 switches downstairs, each corresponding to one of the light bulbs upstairs. How can you figure out which light switch goes to which light bulb by only making 1 trip upstairs?