Final answer:
Javadoc comments begin with /** and are used to create HTML documentation from Java source code. They contain descriptions and tags for classes, methods, or fields.
Step-by-step explanation:
True, Javadoc comments do indeed begin with the special marker /**. These comments are used to generate HTML documentation for Java classes and methods. Javadoc is a tool and documentation standard that allows developers to write special comments in their source code that can then be compiled into a set of webpages that describe the Java classes, methods, and fields of a package.
Javadoc comments typically include a description of the class, method, or field, and may include tags to provide additional information such as parameters, return values, and exceptions. These special comments must be placed before the declaration of the class, method, or field they describe.