Java Interview Programs List For Beginners

List Of All Interview Programs:

2. How to reverse Singly Linked List?
5. Find out duplicate number between 1 to N numbers.
6.  
7. Find out middle index where sum of both ends are equal.
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10. Write a singleton class.
11. 
    
12. Write a program to create deadlock between two threads.
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14. 
    
15. Write a program to reverse a string using recursive algorithm.
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17. Write a program to reverse a number.


18. Write a program to convert decimal number to binary format.
19. 
    
20. Write a program to find perfect number or not.
21. 
    
22. Write a program to implement ArrayList.
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24. Write a program to find maximum repeated words from a file.
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26. Wrie a program to find out duplicate characters in a string.
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28. Write a program to find top two maximum numbers in a array.
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30. Write a program to sort a map by value.
31. 
    
32. Write a program to find common elements between two arrays.
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34. How to swap two numbers without using temporary variable?
35. 
    
36. Write a program to print fibonacci series.
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38. Write a program to find sum of each digit in the given number using recursion.
39. 
    
40. Write a program to check the given number is a prime number or not?
41. 
    
42. Write a program to find the given number is Armstrong number or not?
43. 
    
44. Write a program to convert binary to decimal number.
45. 
    
46. Write a program to check the given number is binary number or not?
47. 
    
48. Write a program for Bubble Sort in java.
49. 
    
50. Write a program for Insertion Sort in java.
51. 
    
52. Write a program to implement hashcode and equals.
53. 
    
54. How to get distinct elements from an array by avoiding duplicate elements?
55. 
    
56. Write a program to get distinct word list from the given file.
57. 
    
58. Write a program to get a line with max word count from the given file.
59. 
    
60. Write a program to convert string to number without using Integer.parseInt() method.
61. 
    
62. Write a program to find two lines with max characters in descending order.
63. 
    
64. Write a program to find the sum of the first 1000 prime numbers.
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66. Find longest substring without repeating characters.
67. 
    
68. Write a program to remove duplicates from sorted array.
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70. How to sort a Stack using a temporary Stack?