Core Java - Interview Questions and Answers for 'Object initialization' | Search Interview Question -

Search Interview Questions

 More than 3000 questions in repository.
 There are more than 900 unanswered questions.
Click here and help us by providing the answer.
 Have a video suggestion.
Click Correct / Improve and please let us know.
Label / Company      Label / Company / Text


Core Java - Interview Questions and Answers for 'Object initialization' - 1 question(s) found - Order By Newest

 Q1. If everything is an object , Cant we declare every object as

Object obj = new String();
Core Java
Ans. Yes, we can do that. Compiler wont complain. But using object reference we can only access methods which have been defined for object class i.e clone(), equals(), hashCode(), toString() etc.

We cannot access methods defined in String class or in any class in hierarchy between String and Object.

For example - we cannot do obj.append("abc") as it will now give compile time error.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     object initialization  object declaration   runtime polymorphism  object oriented programming (oops)  oops concepts

Related Questions

  What are the difference between composition and inheritance in Java?
  What is the difference between Encapsulation and Abstraction?
  What are points to consider in terms of access modifier when we are overriding any method?
 What is Polymorphism in Java ?
 Can you give a real world example of Encapsulation and Abstraction ?
  Why every object constructor automatically call super() in Object before its own constructors?
  How compiler handles the exceptions in overriding ?
  Difference between Composition and Inheritance ?
  Which of the following is tightly bound ? Inheritance or Composition ?
  What are the features of encapsulation ?

Help us and Others Improve. Please let us know the questions asked in any of your previous interview.

Any input from you will be highly appreciated and It will unlock the application for 10 more requests.

Company Name:
Questions Asked: