List of 200+ Java programming interview questions

1. How to reverse Singly Linked List?
2. Find out duplicate number between 1 to N numbers.
3. Find out middle index where sum of both ends are equal.
4. Write a singleton class.
5. Write a program to create deadlock between two threads.
6. Write a program to reverse a string using recursive algorithm.
7. Write a program to reverse a number.
8. Write a program to convert decimal number to binary format.
9. Write a program to find perfect number or not.
10. Write a program to implement ArrayList.
11. Write a program to find maximum repeated words from a file.
12. Write a program to find out duplicate characters in a string.
13. Write a program to find top two maximum numbers in a array.
14. Write a program to sort a map by value.
15. Write a program to find common elements between two arrays.
16. How to swap two numbers without using temporary variable?
17. Write a program to print fibonacci series.
18. Write a program to find sum of each digit in the given number using recursion.
19. Write a program to check the given number is a prime number or not?
20. Write a program to find the given number is Armstrong number or not?
21. Write a program to convert binary to decimal number.
22. Write a program to check the given number is binary number or not?
23. Write a program for Bubble Sort in java.
24. Write a program for Insertion Sort in java.
25. Write a program to implement hashcode and equals.
26. How to get distinct elements from an array by avoiding duplicate elements?
27. Write a program to get distinct word list from the given file.
28. Write a program to get a line with max word count from the given file.
29. Write a program to convert string to number without using Integer.parseInt() method.
30. Write a program to find two lines with max characters in descending order.
31. Write a program to find the sum of the first 1000 prime numbers.
32. Find longest substring without repeating characters.
33. Write a program to remove duplicates from sorted array.
34. How to sort a Stack using a temporary Stack?
35. Print prime numbers?
36. Basic Java program to find area and perimeter of circle
37. Print 1 to 10 without using loops
38. Print numbers in pyramid shape?
39. Add 2 Matrices
40. Basic Java Example Program to check even or add
41. What happens if we place return statement in try catch blocks
42. Print prime numbers?
43. Print semicolon without using semicolon in java
44. Remove whitespace from string javascript
45. Java xor operator with example programs
46. Benefits of arraylist in java over arrays
47. Format text using printf() method in java
48. How to Sort list of objects by multiple fields in java
49. Java example program to round double to 2 decimal places
50. Java program to Convert arraylist to array
51. Finalize() method in java with example program
52. 5 Different ways to print arrays in java
53. Hibernate Criteria Query Language (HCQL)
54. How to format text using printf() method in java
55. Final method in java with example program
56. Java mutliple choice questions with answers on constructors
57. What are the advantages and disadvantages of Hibernate over JDBC
58. How to generate unique random numbers in java
59. Java mcq with answers on this keyword
60. Quicksort algorithm in java with example program
61. Implementation of selection sort algorithm in java with Example program
62. Tower of hanoi recursive solution using Java
63. Creating array of objects in java example program
64. Finding Factorial of a Number in Java
65. Print Pascals triangle in java program
66. Deep copy vs Shallow copy
67. 8 different ways to convert int to String in java
68. Find top two maximum numbers in a array java
69. Exception handling in method overriding
70. How to run jsp program in eclipse using tomcat
71. Java interface programming questions
72. Java program to remove vowels from string java
73. Java programming interview questions and answers for experienced
74. Java Program to reverse vowels in a string
75. Super keyword java programs for interview for freshers and experienced
76. Java programming interview questions on this keyword part 1
77. Super keyword in java inheritance
78. Java programming interview questions on this keyword part 2
79. Java programs on this keyword part 3
80. Servlets interview questions
81. Find shortest palindrome string
82. Validate email using javascript
83. Java XML parsing using DOM Parser
84. Dynamic polymorphism in Java
85. Find missing numbers in an array
86. Collection vs Collections
87. Custom iterator in java
88. Unreachable Blocks in java
89. Get table cell data using JavaScript
90. Enum in java
91. 3 different ways to print exception message in java
92. Can we have try without catch block in java
93. toString() method in java with example program
94. Remove duplicates from arraylist without using collections
95. Explain Hibernate Configuration file
96. What happens if we place return statement in try catch blocks
97. Write a java program to convert binary to decimal
98. Java interview questions on exception handling
99. Java Program to convert Decimal to Binary
100. Is it possible to print message without using System.out.println()
101. Java program to restrict a class from creating not more than three objects
102. Java basic interview programs on this keyword
103. Java Program to Sort elements of Java ArrayList Example
104. Interfaces allows constructors?
105. Can we create static constructor in java
106. Super keyword interview questions java
107. Java interview questions on final keyword
108. Can we create private constructor in java
109. Java Program Find Second highest number in an integer array
110. Java interview programming questions on interfaces
111. Top 15 abstract class interview questions
112. Java interview Questions on main() method
113. Sort employee object by id in descending order using comparable and TreesSet
114. Top 20 collection framework interview Questions
115. Java Interview Program to find smallest and second smallest number in an array
116. Java Coding Interview programming Questions : Java Test on HashMap
117. Explain java data types with example programs
118. How to check internet connection using java
119. Constructor chaining in java with example programs
120. Top 10 Interview Programs and questions on method overriding in java
121. Swap two numbers without using third variable in java
122. Find sum of digits in java
123. How to create immutable class in java
124. AtomicInteger in java
125. Check Even or Odd without using modulus and division
126. String Reverse Without using String API
127. Find Biggest substring in between specified character
128. Check string is palindrome or not?
129. Reverse a number in java?
130. Fibonacci series with Recursive?
131. Fibonacci series without using Recursive?
132. Sort the String using string API?
133. Sort the String without using String API?
134. what is the difference between method overloading and method overriding?
135. How to find largest element in an array with index and value ?
136. Sort integer array using bubble sort in java?
137. Object Cloning in java example?
138. Method Overriding in java?
139. Program for create Singleton class?
140. Print numbers in pyramid shape?
141. Check armstrong number or not?
142. Producer Consumer Problem?
143. Remove duplicate elements from an array
144. Convert Byte Array to String
145. Print 1 to 10 without using loops
146. Add 2 Matrices
147. Multiply 2 Matrices
148. How to Add elements to hash map and Display
149. Sort ArrayList in descending order
150. Sort Object Using Comparator
151. Count Number of Occurrences of character in a String
152. Can we Overload static methods in java
153. Can we Override static methods in java
154. Can we call super class static methods from sub class
155. Explain return type in java
156. Can we call Sub class methods using super class object?
157. Can we Override private methods ?
158. Basic Programming Questions to Practice : Test your Skill
159. Java programming interview questions on collections
160. Write a java program to convert binary to decimal
161. Java Program to convert Decimal to Binary
162. Interfaces allows constructors?
163. Can we create private constructor in java
164. Java interview Questions on main() method
165. Explain java data types with example programs
166. Swap two numbers without using third variable in java
167. Find sum of digits in java
168. Check Even or Odd without using modulus and division
169. String Reverse Without using String API
170. Check string is palindrome or not?
171. Reverse a number in java?