What does the static keyword indicate in Java?

• A. Variables are instance-specific
• B. Variables are global
• C. Variables or methods are common across all instances of a class
• D. Variables cannot be modified

Answer: (C)

In Java, the static keyword signifies that a variable or method belongs to the class itself rather than to any specific instance of the class. This means that all instances of that class share the same static variable or method. When a variable is declared as static, it is initialized only once and retains its value across all instances, making it common for all objects created from the class.

This concept is particularly useful for data that should be shared among all instances or for methods that do not require access to instance-specific data. For example, a static method can be called without creating an instance of the class, which is especially beneficial for utility or helper functions that operate independently of object state.

In contrast, instance-specific variables and methods would return different values for different instances, and global variables as a term can be misleading, as Java does not have true global variables. The idea that static variables cannot be modified is incorrect because static variables can indeed be modified; they just retain their state across instances of the class. Overall, the idea behind static members is the shared nature across all instances of the class.