Wednesday 11 February 2015

Latest Core Java Interview Questions and Answers (Page 3)

Below are some important Core Java interview questions which are asked in most MNC company interviews for beginners or professionals.
11. What is difference between Path and Classpath?
Path and Classpath are operating system level environment variales. Path is used define where the system can find the executables(.exe) files and classpath is used to specify the location .class files.

12. What are local variables?
Local varaiables are those which are declared within a block of code like methods. Local variables should be initialised before accessing them.

13. What are instance variables?
Instance variables are those which are defined at the class level. Instance variables need not be initialized before using them as they are automatically initialized to their default values.

14. How to define a constant variable in Java?
The variable should be declared as static and final. So only one copy of the variable exists for all instances of the class and the value can't be changed also.
static final int PI = 2.14; is an example for constant.

15. Should a main method be compulsorily declared in all java classes?
No not required. main method should be defined only if the source class is a java application.
More Questions & Answers :-
Page1  Page2  Page3  Page4  Page5  Page6  Page7  Page8

No comments:

Post a Comment