|
| 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) |
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 Page 1 2 3 4 5 6 7 8
- Page 5 OOPS concepts Java Interview questions
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