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Java provides four access modifiers to control the visibility of classes, methods, and fields. These modifiers are public, private, protected, and the default (package-private) when no modifier is specified. Each defines a different level of access. 1. public Visibility: Accessible from any other class in any package. Applicable to: Classes, i ...

Variable Scope in C# Variable scope determines where a variable can be accessed within your code. C# supports several distinct types of scope. Local Variables Local variables are declared inside methods, constructors, properties, or any nested code blocks. Their scope is limited to the enclosing code block defined by curly braces {}. namespace ...

Programming principles like high cohesion and low coupling encourage self-contained class internals while exposing only minimal public interfaces. Encapsulation implements this by restricting direct state manipulation and using controlled methods for access and mutation. A common scenario arises when validating field assignments. For example, a ...