Thread leak is when application does not release references of the thread object and those threads do not get garbage collected.
Number of such unused threads increases with time and it can cause issues in the application like long response time.
To overcome this problem we can do the following
1. By maintaining a log for all entry and exit point of thread.
2. Check how the new thread is created and how it is closed.
3. By using exception handling etc.
Do you know how threadsafe is enum in Java?
int a = 1L; won’t compile and int b = 0; b += 1L; compiles fine. Explain me why?
Explain me what is method overloading and method overriding?
Explain me what is the volatile keyword? How and why would you use it?
Tell us why would it be more secure to store sensitive data (such as a password, social security number, etc.) in a character array rather than in a String?
Explain me what is association?
Can you give real world examples of when to use an ArrayList and when to use LinkedList?
Can you explain me what is Polymorphism?
Explain me what is the difference between String s = "Test" and String s = new String("Test")? Which is better and why?Explain me what does it mean for a collection to be “backed by” another? Give an example of when this property is useful?
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