Question

What is the widest valid return type for method in line 3?

Answer 1

Answer : double

Explanation:

However A, B and C are all wrong. Each of these would result in a narrowing conversion. Whereas we want a widening conversion, therefore the only correct answer is D. Don't be put off by the long cast, this applies only to the variable x and not the rest of the expression. It is the variable y (of type double) that forces the widening conversion to double.

Java's widening conversions are:

- From a byte to a short, an int, a long, a float, or a double.

- From a short, an int, a long, a float, or a double.

- From a char to an int, a long, a float, or a double.

- From an int to a long, a float, or a double.

- From a long to a float, or a double.

- From a float to a double.