Java Programming - MCQ Practice Questions

Java supports only single class inheritance to avoid the diamond problem. However, multiple interface implementation is allowed.

All members in an interface are implicitly public. Variables are public static final, and methods are public abstract (unless default or static).

If no access modifier is specified for a class member, it has package-private (default) access, meaning it's accessible only within the same package.

The 'final' keyword prevents a class from being extended. For example: final class MyClass {} cannot be subclassed.

Interfaces cannot be instantiated directly. You can only create objects of classes that implement interfaces.

When no access modifier is specified, the member has package-private (default) access, visible only within the same package.

The 'final' keyword prevents a class from being extended. 'sealed' (Java 17+) allows selective subclassing, but 'final' is the standard way to prevent all subclassing.