Basic Qns

• How are values passed in Java? By value or by reference? ANS: Value
• What is the difference between a set and a map? Can you place a set inside a map?
• Find the Least common ancestor for two given nodes in a tree.
• How do you check if a string is palindrome or not?
• Tell me about MVC architecture?
• OOP concepts like ( polymorphism , inheritance and encapsulation)
• Given a string print the oldest repeating character and newest none repeating character
• Given a string of open and close brackets return whether the number of open and close brackets match or not
• Given two binary trees check if one is subtree of other.
• Verify if given series is a Fibonacci series or not.
• Reverse a doubly linked list.