How many cups are in a pound of cheddar?

It varies:
1 cup shredded= 4 oz, so 10 ounces of shredded cheese would be a little over 2 cups.
1 cup diced = 4.65 oz, so 1 cup is approximately 2 cups.
1 cup melted = 8.6 oz (244g), so 1 cup would be a little less than a cup.