Which of the following expressions can you use to force a type conversion?

The use of the CONV operator is specifically designed to facilitate type conversion in ABAP. This operator allows you to convert a value from one data type to another explicitly. For instance, when you have a variable that holds a certain data type and you want to use it in a context that requires a different type, you can use CONV to ensure that the value is correctly transformed to the needed type.

This operator is particularly useful when you need to work with interfaces or function calls where the argument types must match the expected types. When you apply CONV, you indicate the target type in which the source value should be converted, thus enabling coherent data manipulation and reducing potential type-related errors in your application.

The other expressions serve different purposes. For example, EXACT is used in the context of specifying an exact match of type and value but does not directly handle type conversion. REDUCE is a function that simplifies or aggregates data in collections, while COND is used for conditional expressions but does not imply type conversion. Therefore, CONV stands out as the correct choice for forcing a type conversion.