200+ Java Basic Coding Questions

Java Basic Coding on if else statement

1. Java Program to print maximum among two numbers.
2. Java Program to print maximum among three numbers.
3. Java Program to check a given number is divisible by 3 or not.
4. Java Program to check a given number is divisible by 5 or not.
5. Java Program to check a given number is divisible by 11 or not.
6. Java Program to check a given number is even or odd.
7. Java Program to check whether a year is leap year or not.
8. Java Program to check a given input is digit or not.
9. Java Program to check a given input is alphabet or not.
10. Java Program to check a given input is digit or alphabets.
11. Java Program to check a given number is positive or negative number.
12. Java Program to convert temperature from Celsius to Fahrenheit and Fahrenheit to Celsius.
13. Java Program to check whether a character is vowel or consonant.
14. Java Program to check whether a character is vowel or consonant or special character.
15. Java Program to check a given character is uppercase or lowercase.
16. Java Program to print week day for a given input week.
17. Java Program to print number of days for a given input month.
18. Java Program to check a triangle is equilateral, isosceles or scalene triangle.
19. Java Program to check a person is valid for vote or not?
20. Java Program to check Division on the basis of marks obtained by students. Percentage >= 60% : Division 1, Percentage >= 45% : Division 2, Percentage >= 30% : Division 3, Percentage < 30% : Fail
21. Java Program to Calculate percentage and grade of students on the basis of marks obtained in 5 subjects Maths, Physics, Chemistry, English and Hindi. Marks of subject is taken as an input: Percentage >= 90% : Grade A, Percentage >= 80% : Grade B, Percentage >= 70% : Grade C, Percentage >= 60% : Grade D, Percentage >= 40% : Grade E, Percentage < 40% : Grade F

Java Basic Coding on loop

1. Java Program to print all natural numbers in a given range.
2. Java Program to print all even numbers in a given range.
3. Java Program to print all odd number in a given range.
4. Java Program to print sum of all even numbers in a given range.
5. Java Program to print sum of all odd numbers in a given range.
6. Java Program to print multiplication table of a given number.
7. Java Program to count the digits of a given number.
8. Java Program to print the sum of digits of a given number.
9. Java Program to print all natural numbers in reverse order.
10. Java Program to check whether a given number is Prime or not.
11. Java Program to print all Prime numbers between in a given range.
12. Java Program to find sum of all prime numbers in a given range.
13. Java Program to check a given number is Armstrong or not.
14. Java Program to print all Armstrong numbers in a given range.
15. Java Program to check a given number is Perfect or not.
16. Java Program to check all Perfect numbers in a given range.
17. Java Program to check a given number is Strong number or not.
18. Java Program to print all Strong numbers in a given range.
19. Program in Java to swap first and last digit of number.
20. Java Program to swap values using third variable.
21. Java Program to swap values without using third variable.
22. Java Program to calculate power of a number without using pow method.
23. Java Program to calculate power of a number using pow method.
24. Java Program to check number is palindrome or not.
25. Java Program to print Fibonacci series of a given number.
26. Java Program to print Fibonacci series of a given number using recursion.
27. Java Program to print the frequency of digits in given number.
28. Program in Java to print ASCII character with values.
29. Java Program to print all alphabets from a to z.
30. Java Program to print all uppercase alphabets.
31. Java Program to print all lowercase alphabets.
32. Java Program to print all factors of a number.
33. Java Program to print HCF (GCD) of two numbers.
34. Java Program to print LCM of two numbers.
35. Java Program to find all prime factors of a number.

Java Program on Switch Statement

1. Java Program to print day name of given week using switch statement.
2. Java Program print total number of days in a given month using switch Statement.
3. Java Program to check a given alphabet is vowel or consonant using switch statement.
4. Java Program to check a given number is positive, negative or zero using switch statement.
5. Java Program to print maximum among two numbers using switch statement.
6. Java Program to check a given number is even or odd using switch statement.
7. Java Program to create Simple Calculator using switch statement.
8. Java Program to check whether a year is a leap year or not using switch statement.
9. Java Program to check a given triangle is an equilateral, isosceles or scalene triangle using switch statement.
10. Java Program to Convert positive number into negative and negative number into a positive using switch statement.

Java Coding questions on String Concepts

1. Java Program to print the length of given string.
2. Java Program to concatenate two strings.
3. Java Program to compare two strings.
4. Java Program to perform copy of one string to another string.
5. Java Program to convert lowercase string to uppercase.
6. Java Program to convert uppercase string to lowercase.
7. Java Program to reverse order of words in a given string.
8. Java Program to print the frequency of alphabets, digits or special character in a string.
9. Java Program to count total number of vowels and consonants in a string.
10. Java Program to count total number of words in a string.
11. Java Program to find reverse of a string.
12. Java Program to check whether a string is palindrome or not.
13. Java Program to print the first character in a given string.
14. Java Program to print the last character in a given string.
15. Java Program to print the frequency of each character in a string.
16. Java Program to find highest frequency character in a string.
17. Java Program to find lowest frequency character in a string.
18. Java Program to remove first character from string.
19. Java Program to remove last character from string.
20. Java Program to remove all vowels from string.
21. Java Program to remove all consonants from a given string.
22. Java Program to replace all space with * in a given string.
23. Java Program to remove line break from the string.

Java Basic Programs on Array Concepts

1. Java Program to take input and print elements of array.
2. Java Program to count total number of elements in array.
3. Java Program to count total number of even and odd elements in an array.
4. Java Program to count total number of negative elements in an array.
5. Java Program to print all negative elements in an array.
6. Java Program to find reverse of an array.
7. Java Program to find reverse of an array without using temp variable.
8. Java Program to find sum of all array elements.
9. Java Program to print minimum and maximum element in an array.
10. Java Program to print second largest element in an array.
11. Java Program to copy one array to another array.
12. Java Program to insert an element in an array at end.
13. Java Program to insert an element in an array at first.
14. Java Program to insert an element in an array at given location.
15. Java Program to delete an element in an array at end.
16. Java Program to delete an element in an array at first.
17. Java Program to delete an element from an array at given index.
18. Java Program to count and print frequency of each element in an array.
19. Java Program to print all unique elements in the array.
20. Java Program to count total number of duplicate elements in an array.
21. Java Program to delete all duplicate elements from an array.
22. Java Program to merge two array to third array.
23. Java Program to sperate even and odd number of array in two separate array.
24. Java Program to search an element in an array.
25. Java Program to sort array elements in ascending order.
26. Java Program to sort array elements in descending order.
27. Java Program to perform one left rotation on array.
28. Java Program to perform one right rotation on an array.
29. Java Program to perform two left rotation on array.
30. Java Program to perform two right rotation on an array.
31. Java Program to check two array are equal in size or not.
32. Java Program to find largest and smallest number in array.
33. Java Program to find second highest number in an array.
34. Java Program to find top two maximum number in array.
35. Java Program to merge two arrays.

Java Coding problems on Matrix Concept

1. Java Program to add two matrices.
2. Java Program to subtract two matrices.
3. Java Program to multiply two matrices.
4. Java Program to find transpose of a matrix.
5. Java Program to find upper triangular matrix.
6. Java Program to find lower triangular matrix.
7. Java Program to perform Scalar matrix multiplication.
8. Java Program to check whether two matrices are equal or not.
9. Java Program to find sum of each row and column of a matrix.
10. Java Program to find sum of main diagonal elements of a matrix.
11. Java Program to find sum of minor diagonal elements of a matrix.
12. Java Program to interchange diagonals of a matrix.
13. Java Program to find sum of upper triangular matrix.
14. Java Program to find sum of lower triangular matrix.
15. Java Program to find determinant of a matrix.
16. Java Program to check Identity matrix.
17. Java Program to check Sparse matrix.
18. Java Program to check Symmetric matrix.

Java Coding Questions of Singly Linked List

1. Java Program to Create and Traverse a Singly linked list.
2. Java Program to Insert a node at the beginning of the Singly linked list.
3. Java Program to Insert a node at the End of Singly Linked List.
4. Java Program to Insert a node at the Given location of Singly Linked List.
5. Java Program to Search an element in the Singly linked list.
6. Java Program to Delete a node at the beginning of the Singly linked list.
7. Java Program to Delete a node at the End of the Singly linked list.
8. Java Program to Delete a node at the Given Location of the Singly linked list.
9. Java Program to Reverses the Singly linked list.

Java Coding Questions of Doubly Linked List

1. Java Program to Create and Traverse a Doubly Linked List.
2. Java Program to Insert a node at the beginning of the Doubly Linked List.
3. Java Program to Insert a node at the End of Doubly Linked List.
4. Java Program to Insert a node at the Given location of Doubly Linked List.
5. Java Program to Search an element in the Doubly Linked List.
6. Java Program to Delete a node at the beginning of the Doubly Linked List.
7. Java Program to Delete a node at the End of the Doubly Linked List.
8. Java Program to Delete a node at the Given Location of the Doubly Linked List.
9. Java Program to Reverses the Doubly Linked List.

Java Coding Questions of Circular Linked List

1. Java Program to Create and Traverse a Circular Linked List.
2. Java Program to Insert a node at the beginning of the Circular Linked List.
3. Java Program to Insert a node at the End of Circular Linked List.
4. Java Program to Insert a node at the Given location of Circular Linked List.
5. Java Program to Search an element in the Circular Linked List.
6. Java Program to Delete a node at the beginning of the Circular Linked List.
7. Java Program to Delete a node at the End of the Circular Linked List.
8. Java Program to Delete a node at the Given Location of the Circular Linked List.
9. Java Program to Reverses the Circular Linked List.

Java Coding questions on Searching

1. Java Program to perform linear search.
2. Java Program to perform Binary Search.

Java Coding questions on Sorting

1. Java Program to Implement Bubble Sort.
2. Java Program to Implement Selection Sort.
3. Java Program to Implement Insertion Sort.
4. Java Program to Implement Quicksort.
5. Java Program to Implement Counting Sort.
6. Java Program to Implement Merge Sort.
7. Java Program to Implement Radix Sort.
8. Java Program to Implement Bucket Sort.
9. Java Program to Implement Heap Sort.
10. Java Program to Implement Shell Sort.