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|Java - Interview Questions and Answers|
|Ans. We can declare the reference as final to avoid reassignment but again we can always initialize the final reference to null. Even if there was any such facility available , it would have meant poor use of resources by assigning a new object in memory to each reference that's created. Many a times references are just meant to refer to other objects which already have a reference i.e sharing object by multiple references.|
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|Like Discuss Correct / Improve  null  NullPointerException|
|Which of the following exception is thrown when we try to access element which is beyond the size ?|
|Is it ok to use optional everywhere just to get over nullpointerexception ?|
|How would you go about debugging a NullPointerException?|
|When does an application throw NullPointerException ?|
|How can we protect an application from throwing a NullPointerException ?|
|Invoking start twice on same thread leads to ..|
|Is it a bad practice to initialize object reference to Null ?|