Core Java Interview Questions with Answers - Part II
11)What if I write static public void instead of public static void?
Program compiles and runs properly.
12)What is the default value of the local variables?
The local variables are not initialized to any default value, neither primitives nor object references.
13)What is difference between object oriented programming language and object based programming language?
Object based programming languages follow all the features of OOPs except Inheritance. Examples of object based programming languages are JavaScript, VBScript etc.
14)What will be the initial value of an object reference which is defined as an instance variable?
The object references are all initialized to null in Java.
15)What is constructor?
Constructor is just like a method that is used to initialize the state of an object. It is invoked at the time of object creation.
16)What is the purpose of default constructor?
The default constructor provides the default values to the objects. The java compiler creates a default constructor only if there is no constructor in the class.
17)Does constructor return any value?
Ans:yes, that is current instance (You cannot use return type yet it returns a value).more details...
18)Is constructor inherited?
No, constructor is not inherited.
19)Can you make a constructor final?
No, constructor can't be final.
20)What is static variable?
static variable is used to refer the common property of all objects (that is not unique for each object) e.g. company name of employees,college name of students etc.
static variable gets memory only once in class area at the time of class loading.
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