What type of method cannot access `this`?

Static methods cannot access this because they belong to the class itself rather than any particular instance of the class. The this keyword in object-oriented programming refers specifically to the current object or instance of the class. Since static methods are not tied to a single instance, they do not have access to instance variables or methods, and therefore, the this keyword is not relevant to them.

In contrast, instance methods are designed to work with instances of a class and can access this to refer to the specific instance they are acting upon. Abstract methods, which are meant to be overridden in derived classes, also have access to this when called on an instance. Default methods, introduced in interfaces, allow the implementation of methods in the interface while still allowing access to this through the implementing class.

Since static methods operate at the class level, their design intentionally excludes access to this, making them fundamentally different from instance, abstract, and default methods in this respect.