Practical Examples on Types of Inheritances

The video tutorial covers key concepts of inheritance in Java, focusing on the limitations of multiple inheritance and how interfaces can be used to achieve similar functionality. It explains class and object relationships, using practical examples to illustrate how inheritance works in Java. The tutorial also touches on common interview questions related to inheritance and provides insights into handling variable ambiguity in inherited classes.

Why is multiple inheritance not supported in Java?

• Java supports multiple inheritance through classes.

• Java does not support object-oriented programming.

• It leads to ambiguity and complexity.

• It is not compatible with Java's syntax.

What is the role of interfaces in Java regarding multiple inheritance?

• Interfaces allow multiple inheritance.

• Interfaces prevent multiple inheritance.

• Interfaces are unrelated to inheritance.

• Interfaces simplify single inheritance.

In the example with classes A and B, what happens when you try to access the variable 'i' from an object of class B?

• The variable from class B is accessed.

• The program crashes.

• The variable from class A is accessed.

• An error occurs due to ambiguity.

What does the syntax 'A a = new B();' imply in Java?

• It creates an object of both classes A and B.

• An error occurs due to incompatible types.

• An object of class B is created with access to class A's methods.

• An object of class A is created.

How does Java resolve ambiguity when accessing variables with the same name in parent and child classes?

• It throws a compile-time error.

• It depends on the reference type used.

• It always accesses the parent class variable.

• It always accesses the child class variable.

What is the output when accessing a variable declared in both parent and child classes using a parent class reference?

• The default value of the variable type.

• An error due to ambiguity.

• The parent class variable value.

• The child class variable value.

In the context of Selenium WebDriver, what does 'WebDriver driver = new FirefoxDriver();' signify?

• It results in a syntax error.

• It creates an object of WebDriver.

• It creates an object of both WebDriver and FirefoxDriver.

• It creates an object of FirefoxDriver with access to WebDriver methods.