Question :   Free-form Questions: 1)Explain why aliases can cause trouble for programmers who : 2015383

Free-form Questions:

1)Explain why aliases can cause trouble for programmers who are not aware of them.

2)Explain what a NullPointerException is and how it can arise.

3)Consider the condition (x = = y).  How is this handled if x and y are primitive types?  How is this handled if x and y are objects?

4)Provide a reason why an instance data would be declared static.

5)Provide a reason why a method would be declared static.