Variables

Which of these can not be used for a variable name in Java?

What is the default value for boolean?

Which of the following is a valid declaration of a char?

Evaluate the following Java expression, if x=3, y=5, and z=10:

++z + y – y + z + x++

In which process, a local variable has the same name as one of the instance variables?

Given that Student is a class, how many reference variables and objects are created by the following code?

Student studentName, studentId;  

studentName = new Student();  

Student stud_class = new Student();