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EPAM Interview Experience for Java Developer

  • Difficulty Level : Basic
  • Last Updated : 26 Oct, 2021

Technical Interview Question: 

  1. What are the oops concepts?
  2. What is polymorphism and what are the types of polymorphism
  3. Write code for compile-time and runtime polymorphism.
  4. What are singleton classes and the factory method?
  5. What is Exception and Explain Exception Hierarchy?
  6. What are throwable keywords and some questions related to try catch syntax?
  7. What is a volatile keyword?
  8. What is the difference between interface and abstract classes?
  9. What is Functional Interface
  10. What is JUnit
  11. Difference between Hashmap and ArrayList?
  12. Write code to add remove element from hashmap?
  13. Can we override possible in the same class?
  14. How many data structures did you familiar with?
  15. What is binary search ? Write a program to implement binary search?
  16. What is the time complexity of quicksort?
  17. How many types of collections is tier?
  18. What is stack ? give implementation of stack?
  19. Write a program to convert given input element n array [1,1,0,1] to [0,0,1,0] ?
  20. Write program to display numbers which are not in array suppose array size is 10;
  21. for example a={3,6,8,9};
    output a={1,2,4,5,7,10};
  22. What are types for implementing thread in java?
  23. Write a program to Reverse a String?
  24. WAP to take input as jay2 and output jayjay?


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  • Clear all basics concept related to class abstract a class, interface, and data structure.
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