⟩ What is the priority for Garbage collector thread?
low-priority
low-priority
Explain me why doesn’t the following code generate a NullPointerException even when the instance is null?
Explain me what is a good usecase of calling System.gc()?
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?