Which statement about implicit widening is true?

Which statement about implicit widening is true?

• A. It does not require an explicit cast
• B. It requires an explicit cast
• C. It is always illegal
• D. It never changes the value

Answer: (A)

Implicit widening is when a value is promoted from a smaller numeric type to a larger one automatically, without writing an explicit cast. The language guarantees that the destination type can represent all values of the source type, so the compiler performs the conversion behind the scenes. Because of that automatic handling, you don’t need to cast, which is why this statement is true. In many languages this also means the numeric value remains the same after promotion, since no information is lost in the widening process. The other options miss the essential point: you don’t need a cast for widening, it isn’t inherently illegal, and while the value is preserved in normal cases, the main idea being tested is the lack of an explicit cast requirement.

Implicit widening is when a value is promoted from a smaller numeric type to a larger one automatically, without writing an explicit cast. The language guarantees that the destination type can represent all values of the source type, so the compiler performs the conversion behind the scenes. Because of that automatic handling, you don’t need to cast, which is why this statement is true. In many languages this also means the numeric value remains the same after promotion, since no information is lost in the widening process. The other options miss the essential point: you don’t need a cast for widening, it isn’t inherently illegal, and while the value is preserved in normal cases, the main idea being tested is the lack of an explicit cast requirement.