Telephonic Java Interview Series 25
This is Telephonic Java Interview Series 25 questions for Sr. Java Developer position in big health care company. Below are questions:
1. What version of JDK you have used ?
2. What feature from JDK 1.7 used ?
3. How you resource thread safe ?
4. What is difference between synchronization and lock interface ?
5. How you set thread priority what package do you use ?
6. Which class wait and notify has been defined ?
7. Why it’s defined in object class ?
8. Why its not defined in thread class ?
9. What is a Livelock in thread ?
10. What is green lock in thread ?
11. What is volatile variable in thread ?
12. What will you prefer synchronized block or method and why ?
13. How you make class immutable ?
14. What is the use of immutable class ?
15. Give me real time scenario where you have used immutable class ?
16. What is polymorphism ?
17. How you achieve polymorphism in Java ?
18. Whey you do dependency injection is this form of polymorphism ?
19. Why it is not form of polymorphism when you use DI ?
20. What is application context in spring ?
21. How many type of application context are available in spring ?
22. What is difference between update and lock ?
23. What is composite id in hibernate and how you create composite id?
24. What is scope in spring ?
25. How many types of scope available in spring ?
26. How many types of DI available in spring ?
27. What is green lock in thread ?
28. If you define once scope is singleton and other is prototype how you achieve this inject in spring ?
29. What is versioning in hibernate ?
30. How do you configure versioning in hibernate ?
31. What is stale excetpiton in hibernate ?
32. What is data-source exception in spring ?
33. Can you do versioning with composite key in hibernate ?
34. What is spring batch ?
35. How do you configure spring batch ?
36. What is thread configuration in spring batch ?
37. How do you control mutlti thread in hibernate ?
38. Let’s take one scenario where two thread is read data from table and another thread is updating data in the table. Will it be visible updated data in hibernate ?
39. What is concurrnethashmap in Java ?
40. Let’s suppose one therea update data in concurrent hash map and another is reading will it be in synchronized ?
41. What is difference between hashcode and equal ?
42. What is contract between hashcode and equals ?
43. How hashmap works in Java ?
44. How hashmap resolve hash collision ?
45. What is hash collision ?
46. Why you override and equal and hashcode ?
47. What is abstraction in Java ?
48. What is exception class hierarchy in Java ?
49. Name the class which extends exception class ?
50. What is hierarchy of Error class in Java ?
51. What are classes extends error ?
52. What is difference between checked and un-checked exception in Java ?
53. Difference between final finalize and finally ?
54. What are circumstances where finally block will not be executed ?
55. What is hirarchy of RuntimeException class ?
