Oracle Interview Question for experienced developer

  1. How to implement your own equals() and hashcode() methods in java?
  2. How to implement your own ArrayList in java?
  3. How to make your own immutable class in java?
  4. How do you append a first name to a list of name using stream? For example if you have a list of name and you want to append Dr. before first name how to do that using java 8?
  5. What is strategy in java while implementing your own equals() method?
  6. What is upcasting and downcasting
  7. What is class cast exception?
  8. What is lambda expression ?
  9. When to use abstraction and interface ?
  10. What is functional interface ?
  11. What is abstraction and encapsulation?
  12. Give an example of encapsulation?


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