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|Core Java - Interview Questions and Answers for 'Virtual table method' - 1 question(s) found - Order By Rating|
|Ans. There is one VTable for each class.|
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|Like Discuss Correct / Improve  virtual table method  vtable  runtime polymorphism  object oriented programming (oops)  oops concepts   method overriding intermediate   rare|
|Why is String immutable in Java ?|
|Why Char array is preferred over String for storing password?|
|How does making string as immutable helps with securing information ? How does String Pool pose a security threat ?|
|Difference between HashMap and Hashtable?|
|How is string object immutable if we can concat a string to it ?|
|How to implement an immutable class ?|
|Can we use null as a key for a map collection ?|
|What is an immutable class ?|
|If you are given a choice to implement the code to either Insert a Record or Update if already exist, Which approach will you follow ?|
|Why HashTable has been deprecated ?|