Final Keyword in Java

The video tutorial covers the use of the 'final' keyword in Java, explaining its application in variables, classes, and methods. It highlights how 'final' prevents changes to variables, inheritance of classes, and overriding of methods. The tutorial also distinguishes between 'final' and 'finally', emphasizing their different roles in Java programming. Additionally, it reviews other important keywords and OOP concepts, providing practical examples to enhance understanding.

What happens if you try to change the value of a variable declared as 'final'?

• The program crashes.

• An error is thrown.

• The value changes successfully.

• The value changes after a warning.

What is the effect of marking a class as 'final'?

• It can be extended by other classes.

• It becomes abstract.

• It cannot be instantiated.

• It cannot be extended by other classes.

Which keyword is used to prevent a class from being inherited?

• private

• static

• final

• abstract

Why would you declare a method as 'final'?

• To allow it to be overridden.

• To prevent it from being overridden.

• To make it abstract.

• To make it private.

Which of the following is NOT a use of the 'final' keyword?

• Preventing class inheritance.

• Preventing method overloading.

• Preventing variable reassignment.

• Preventing method overriding.

What is the difference between 'final' and 'finally'?

• 'final' is for constants and inheritance, 'finally' is for error handling.

• 'final' is used for error handling, 'finally' is for constants.

• Both are used for error handling.

• Both are used for declaring constants.

What is the purpose of the 'finally' block in exception handling?

• To declare constants.

• To catch exceptions.

• To override methods.

• To execute code regardless of an exception being thrown or not.