Aclass diagram
answer
provides an overview of a class's data and methods
provides method implementation details
is never used by nonprogrammers because it is too technical
all of the above

provides an overview of class's data and methods

Explanation:

Class Diagram is used in software engineering to represent:

- classes

- attributes

- methods

- relationship between classes

It provides a representation of the static layout of the application in object oriented design. It does not provide method implementation details. In fact code skeleton can be automatically generated from class diagram using appropriate UML tools.

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