Build Your
POWERFUL CAREER

TOP 80+ Interview Questions Of Core Java Language

Basic Core Java + OOPs Interview Interview Questions

1. What is Java programming language ?

2. What is difference between Java & C++ language ?

3. What is Features of Java language ?

4. What is JVM & JDK in Java language ?

5. What is difference between Java platform & others platforms ?

6. What are the various access specifiers in Java language ?

7. What are the advantages of packages in java language ?

8. What is OOPs concept in java language ?

9. What is Class & Object in java language ?

10. What is Constructor in Java language ?

11. How many types of Constructors in java language ?

12. What is Default Constructor in java language ?

13. What is difference between Java constructor & Java Methods ?

14. What is Static Variable in Java language ?

15. What is Static Method in Java language ?

16. What is Static Block in java language ?

17. Difference between static variable, static methods and static block in Java language ?

18. What is This keyword and it's usege in Java programming language ?

19. What is the Inheritance and it is types in java language ?

20. Why is Inheritance used in java language ?

21. Why is Multiple Inheritance not supported in java language ?

22. What is Composition & Aggregation in java language ?

23. Why java language does not supported pointer ?

24. What is Super keyword and it's usage in java language ?

25. Difference between This keyword & Super keyword in java language ?

26. What is Cloning methods in java language ?

27. What is method overloading in java language ?

28. What is method overriding in java language ?

29. Difference between method overloading & method overriding in java language ?

30. What is the Final variable in java language ?

31. What is the Final method in java language ?

32. What is the Final class in java language ?

33. Can we declare Constructor as the final in java language ?

34. Can we declare an Interface as the final in java language ?

35. Difference between Final method & Abstract method in java language ?

36. What is Polymorphism in java language ?

37. Difference between compile time polymorphism & run time polymorphism in java language ?

38. What is IntanceOf operator in java language ?

39. What is the Abstraction and abstract class in java language ?

40. Difference between Abstraction & Encapsulation in java language ?

41. What is the Interface in java language ?

42. What is the Encapsulation and it's advantages in java language ?

43. What is the Exception handling and it's types in java language ?

44. What is the Checked & Unchecked exception in java language ?

45. What is the Finally block in java language ?

46. What is throw & throws keyword in java language ?

47. Difference between throw & throws keyword in java language ?

48. Why are the objects immutable in java language ?

49. Difference between String & StringBuffer in java language ?

50. Difference between StringBuilder & StringBuffer in java language ?

51. What is toString() Methods in java language ?

52. What is Garbage collection in java language ?

53. What is gc() method in java language ?

54. What is Finalize() method in java language ?

55. What is difference between Finalize, Finally & Final in java language ?

56. What is Serialization in java language ?

57. What is Deserialization in java language ?

58. What is Serialization in java language ?

59. What is Transient keyword in java language ?

60. What is Wrapper class & Inner class in java language ?

Basic Multithreading Interview Questions

1. What is Multithreading & It's advantages in java programming language ?

2. What is Thread & Process in multithreading ?

3. Explain the lifecycle of Thread in Java language ?

4. What is the Wait() Method in java language ?

5. What is difference between Sleep() Method & Wait() Method ?

6. What is the Sleep() Method in java multithreading ?

7. Can we call Run() method instead of Start() method in java multithreading ?

8. What is OOPs concept in java language ?

9. What is Class & Object in java language ?

10. What is c Language ?

Basic Collection Framework Interview Interview Questions

1. What is difference between Collection & Collections in java collection framework ?

2. What is Collection Framework in java programming language ?

3. Difference between ListIterator & Iterator in java collection framework ?

4. Difference between ArrayList & LinkedList in java collection framework ?

5. What is difference between ArrayList & Vector in java collection framework ?

6. What is difference between Collection & Array in java collection ?

7. What is the Enumeration in collection framework ?

8. What is difference between TreeSet & Set in java collection framework ?

9. What is difference between MAP & Set in java collection framework ?

10. What is difference between HashSet & HashMap in java collection framework ?

11. What is difference between HashMAP & HashTable in java collection framework ?

12. What is difference between Comparable & Comparator in java collection framework ?

13. What does the hashCode() method in java programming language ?

14. Difference between Array & ArrayList in java collection framework ?

15. How to Reverse ArrayList in collection framework java programming language ?

Basic Java Language Programs

1. What are the different type of storage specifiers in Java language ?

2. Make a program to swap two numbers without using third variable in Java language ?

3. Write a program to print Fibnacci series in Java language ?

4. Make a program to print Fibnacci series without using recursion in Java language ?

5. Make a program to print Fibnacci series using recursion in Java language ?

6. Make a program to check Prime number in Java programming language ?

7. Make a program to check Palindrome number in Java programming language ?

8. Make a program to print factorial of given number without using recursion in Java language ?

9. Make a program to print factorial of given number using recursion in Java language ?

10. Write a program to check Armstrong number in Java language ?

11. Write a program to Reverse a given number in Java language ?

12. Write a program to Sum of digits in Java programming language ?

13. Write a program to print star triangle using Java language ?

14. Make a program to print Alphabet triangle using Java language ?

15. Write a program to print Number triangle using Java language ?

16. Write a program to convert number in characters using Java language ?

17. Make a program to swap two numbers using third variable in Java language ?

18. What is built in function in Java Language ?

19. Make a program to subtract two number without using subtraction operator in Java language ?

20. Write a program to check whether the number is even or odd using Java language ?

21. What is compiler and interpreter and difference between them ?

22. Can I use int datatype to store 98765 value in Java Language ?

23. What is built in function in Java Language ?

24. Write a program to generate random numbers using Java programming language ?

Go To Home Page
Go To Job Page

Menu

Jobs

Go To Job Section & Apply for Dream Jobs.

Social Link

Join Now on Telegram