Final answer:
Generally, client code does not need to know the representation type of the data it works with, thanks to principles of abstraction and encapsulation in object-oriented programming.
Step-by-step explanation:
The question asks whether client code needs to be aware of the representation type of data it manipulates. The answer to this question is generally false.
In many programming paradigms, especially those following the principles of abstraction and encapsulation in object-oriented programming, the client code interacts with objects through their interfaces without needing to understand the underlying data representation. This concept is important for maintaining modularity and flexibility in software design.