B2 Tech

Web Dev Snippets

  • Facebook
  • Twitter
  • Google Plus
  • Home
  • Java
    • Core Java
    • Core Java Programs
    • Java Swings
    • JavaFX
  • Web Technologies
    • Angular 10
    • Angular 2
    • Angular 9
    • Boostrap 4
    • CSS
    • Express.js
    • High Charts
    • HTML
    • Javascript
    • Javascript Programs
    • jQuery
    • Mongoose
    • Nodejs
    • Typescript
  • Full Stack Applications
    • CRUD Applications
  • Advance Java/J2EE
    • JSP
    • Servlets
    • JSF
    • Thymeleaf
    • Spring MVC
    • Spring Boot
    • Spring Security
    • JPA
    • Hibernate
    • Struts
    • MyBatis/iBatis
  • Interview Programs
  • Web Services
    • REST Services
    • SOAP Services
  • Testing
  • About
  • Contact

Category - Interview Programs

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Given an array of ints, return true if the value 3 appears in the array exactly 3 times, and no 3’s are next to each other.

3 months ago
by Bushan Sirgur
1 min read
Add Comment

Following are the test cases Test cases Result Status haveThree({12,3,4,3,88,3}) true OK haveThree({22,3,3,3,17,3}) false OK haveThree({3,4,3,6,3,7}) true OK Java solution package test; public class Program20...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Given an array of ints, return true if the sum of all the 2’s in the array is exactly 8.

3 months ago
by Bushan Sirgur
1 min read
Add Comment

Following are the test cases Test cases Result Status sum28({10,20,30,40,50,60,2}) false OK sum28({2,10,7,2,2,2}) true OK sum28({5,6,1,2,2,2}) false OK Java solution package test; public class Program19 { public...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Given a string and an int n, return a string made of the first and last ‘ n’ chars from the string. The string length will be at least n.

3 months ago
by Bushan Sirgur
1 min read
Add Comment

Following are the test cases Test cases Result Status nTwice(Hello,2) Helo OK nTwice(Chocolate,3) Choate OK nTwice(java,1) ja OK Java solution package test; public class Program18 { public static void...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Given an “out” string length 4, such as “<<>>”, and a word, return a new string where the word is in the middle of the out string, e.g. “<>”

3 months ago
by Bushan Sirgur
1 min read
Add Comment

Following are the test cases Test cases Result Status makeOutWord(<<>>,Yay) <<Yay>> OK makeOutWord([[]],Word) [[Word]] OK makeOutWord([((JAVA))] ((JAVA)) OK Java solution package...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Return true if the given string contains 1 or 3 ‘e’ chars. Otherwise return false.

3 months ago
by Bushan Sirgur
1 min read
Add Comment

Following are the test cases Test cases Result Status stringE(Hello) true OK stringE(Heelele) false OK stringE(Heelle) true OK Java solution package test; public class Program16 { public static void...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Return true if the array contains, somewhere, three increasing adjacent numbers like …. 4, 5, 6, … or 23, 24, 25.

3 months ago
by Bushan Sirgur
1 min read
Add Comment

Following are the test cases Test cases Result Status tripleUp({1,2,3,7,5,9}) true OK tripleUp({1,4,5,6,2}) true OK tripleUp({1,2,4,5}) false OK Java solution package test; public class Program15 { public static...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Pass an int as parameter. Find the sum of the digits in the number and return it.

3 months ago
by Bushan Sirgur
1 min read
Add Comment

Following are the test cases Test cases Result Status sumOfDigits(144) 9 OK sumOfDigits(457) 16 OK sumOfDigits(345) 12 OK Java solution package test; public class Program14 { public static void main(String[]...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Given a string of even length, return the first half. So the string “WooHoo” yields “Woo”.

3 months ago
by Bushan Sirgur
1 min read
Add Comment

Following are the test cases Test cases Result Status firstHalf(HelloThere) Hello OK firstHalf(abcdef) abc OK firstHalf(Word) Wo OK Java solution package test; public class Program13 { public static void...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Given an array of ints, return true if one of the first 4 elements in the array is a 9. The array length will be greater than 4.

3 months ago
by Bushan Sirgur
1 min read
Add Comment

Following are the test cases Test cases Result Status arrayFront9({1,2,9,3,4}) true OK arrayFront9({9,2,3,4,56}) true OK arrayFront9({2,3,4,5}) false OK Java solution package test; public class Program12...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Write a program to generate Fibonacci series of limit number of elements.

3 months ago
by Bushan Sirgur
1 min read
Add Comment

Following are the test cases Test cases Result Status generateFibSeries(5) {0,1,1,2,3} Ok generateFibSeries(7) {0,1,1,2,3,5,8} Ok generateFibSeries(10) {0,1,1,2,3,5,8,13,21,34} Ok Java solution public class Program11...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Given a string, return a new string where the first and last chars have been exchanged

4 months ago
by Bushan Sirgur
1 min read
1 Comment

Test cases Test cases Expected Result frontBack(abcd) dbca OK frontBack(Bee) eeB OK frontBack(MazE) EazM OK Java solution: public class Program10 { public static void main(String[] args)...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Pass an int array and an int and do a search of the second parameter in the first, and return true/false.

4 months ago
by Bushan Sirgur
1 min read
Add Comment

Test cases Test cases Expected Result searchElement({33,44,21,98,27,94},21) true OK searchElement({1232,432,546,980,984},980) true OK searchElement({3,4,9,87,29},2) false OK Java solution: public class Program9...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Given an array of ‘N’ elements .Return the sum of all array elements

4 months ago
by Bushan Sirgur
1 min read
Add Comment

Test cases Test cases Expected Result arraySum({5,5,5,5,5}) 25 OK arraySum({1,3,4,7,8}) 23 OK arraySum({100,200,300}) 600 OK Java solution: public class Program8 { public static void main(String[] args) { int a[]...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Accept a string as parameter. Find out how many consonants present in it.

4 months ago
by Bushan Sirgur
1 min read
Add Comment

Test cases: Test cases Expected Result countConsonents(instanceof is for references only) –>[18] 18 OK countConsonents(Object Oriented) –>[8] 8 OK countConsonents(Design Patterns88)...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Pass a string as parameter. Find out how many vowels present in it

4 months ago
by Bushan Sirgur
1 min read
Add Comment

Test cases: Test cases Expected Result countVowels(instanceif is for references only) 11 OK countVowels(Object Oriented) 6 OK countVowels(Design Patterns) 4 OK Java solution: public class Program6 { public static...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Given two strings, append them together (known as “concatenation”) and return the result.

4 months ago
by Bushan Sirgur
1 min read
Add Comment

Test cases: Test cases Expected Result stringConcat(Hello,World) Hello World OK stringConcat(Code,ranch) Code ranch OK stringConcat(Web,Application) Web Application OK Java solution: public class Program5 { public...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Return true if the given non-negative number is a multiple of 3 or a multiple of 5

4 months ago
by Bushan Sirgur
1 min read
Add Comment

Test cases: Test cases Expected Result or35(15) true OK or35(8) false OK or35(12) true OK Java solution: public class Program4 { public static void main(String[] args)...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Test whether the number is divisible by 7 or not

4 months ago
by Bushan Sirgur
1 min read
Add Comment

Test cases: Test cases Expected Result isDivisibleBy7(17) false OK isDivisibleBy7(77) true OK isDivisibleBy7(12) false OK Java solution: public class Program3 { public static void main(String[] args)...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Check the given number is odd or even

4 months ago
by Bushan Sirgur
1 min read
Add Comment

Test cases: Test cases Expected Result testOddEven(12) even OK testOddEven(3) odd OK testOddEven(-55) odd OK Java solution: package test; public class Program2 { public static void main(String[] args)...

Continue reading

  • Core Java Programs
  • Interview Programs
  • Javascript Programs

Pass two ints as parameter and return the sum of numbers.

4 months ago
by Bushan Sirgur
1 min read
Add Comment

Test cases: Test cases Expected Result sum(10,12) 22 OK sum(1,2) 3 OK sum(2147483647,1) 2147483648 OK Java solution: public class Sum { public static void main(String[] args) { Sum.sum(10, 12); Sum.sum(1...

Continue reading

  • Core Java Programs
  • Interview Programs

Interview Program – Matrix

January 12, 2020
by Bushan Sirgur
1 min read
1 Comment

Print matrix in Z form. Input: mat[][] = {1, 2, 3, 4, 5, 6, 7, 8, 9} Output: 1 2 3 5 7 8 9 public class PrintTheMatrixOrder { public static void printTheMatrix(int mat[][]) { for (int i = 0; i < mat.length; i++)...

Continue reading

  • Core Java Programs
  • Interview Programs

Interview Program

January 12, 2020
by Bushan Sirgur
1 min read
Add Comment

Print all jumping numbers smaller than or equal to x. Input: x = 105 Output: 0 1 2 3 4 5 6 7 8 9 10 12 21 23 32 34 43 45 54 56 65 67 76 78 87 89 98 101 Note: A number is called as a jumping number if all adjacent digits in it...

Continue reading

  • Core Java Programs
  • Interview Programs

Interview Program – Matrix

January 12, 2020
by Bushan Sirgur
1 min read
Add Comment

Find if there is a rectangle in binary matrix with corners as 1. Input: mat[][] = {{1, 0, 0, 1, 0}, {0, 0, 1, 0, 1}, {0, 0, 0, 1, 0}, {1, 0, 1, 0, 1}} Output: YES Note: as there exists –             1 0 1        ...

Continue reading

  • Core Java Programs
  • Interview Programs

Interview program – Matrix

January 6, 2020
by Bushan Sirgur
1 min read
Add Comment

Print squares of diagonal elements in O(n) time complexity Input: 1 2 3 4 5 6 7 8 9 Output: 1 25 81 9 25 49 public class SquareOfDiagonal { static void printDiagonalSquare(int[][] mat) { int n = mat.length; int...

Continue reading

  • Core Java Programs
  • Interview Programs

Interview Program – Array

January 5, 2020
by Bushan Sirgur
2 min read
Add Comment

Find the length of unsorted subarray such that sorting this subarray can sort all the array. Print the start and end index. public class Solution { public static void unsortedArrayIndex(int ar[]) { int i = 0; int...

Continue reading

  • Core Java Programs
  • Interview Programs

Interview Question – Stack

January 4, 2020
by Bushan Sirgur
1 min read
Add Comment

Given a stack containing n elements reverse the stack with the help of an empty stack. import java.util.Stack; public class StackReversal { public static void reverseStack(Stack<Integer> stack) { if...

Continue reading

  • Core Java Programs
  • Interview Programs

Program to find the number of occurrences in a given String

August 15, 2018
by Bushan Sirgur
1 min read
Add Comment

Problem Statement: Given 2 String source and target, find the number of occurrences that the String target is present in String source and return the count. Test Cases: public static void main(String[] args)...

Continue reading

  • Core Java Programs
  • Interview Programs

Sort the characters Ascending/Descending in a given String

August 15, 2018
by Bushan Sirgur
1 min read
Add Comment

Problem Statement: Given a String, Sort the characters in Ascending/Descending from a given String and return the String Test Cases public class SortCharactersInWord { public static void main(String[] args)...

Continue reading

  • Core Java Programs
  • Interview Programs

Java 60+ Patterns Programs – Stars/Alphabets/Numbers

August 1, 2018
by Bushan Sirgur
19 min read
3 Comments

Following are the Patterns asked in many job interviews for both Freshers as well as Experience. Same logic will apply to all the programming languages. Write a Program to Print the following Pattern import...

Continue reading

  • Core Java Programs
  • Interview Programs

Sort the array elements in Ascending/Descending order using Bubble Sort

July 27, 2018
by Bushan Sirgur
2 min read
Add Comment

Hi guys, Bushan here, welcome back to B2 Tech. Today in this article we will discussing  about one of the most important sorting technique and also an important Java interview program of all time. Given an integer array, sort...

Continue reading

1 2 Next

About Author

View all posts

Support me


Love my tutorials? Please support me by donating:

Newsletter



Recent Posts

  • Spring Boot Thymeleaf for each with Example April 21, 2021
  • Most commonly used Java Math methods with Examples April 20, 2021
  • Spring Boot Thymeleaf CSS JS with Example April 12, 2021
  • Spring Boot Thymeleaf with Example April 11, 2021
  • Spring Data JPA Sort Multiple Columns with Examples April 9, 2021
  • Spring Data JPA Sort by Date with Example April 8, 2021
  • Spring Data JPA Pagination with Example April 7, 2021
  • Spring Data JPA Query Methods In with Examples April 3, 2021
  • Spring Data JPA Query Methods Like with Example April 2, 2021
  • Spring Data JPA Between Date Example March 29, 2021

Featured Posts

  • Spring Boot Thymeleaf for each with Example
  • Most commonly used Java Math methods with Examples
  • Spring Boot Thymeleaf CSS JS with Example
  • Spring Boot Thymeleaf with Example
  • Spring Data JPA Sort Multiple Columns with Examples

Most Viewed Posts

  • Angular 2 and Spring REST Simple CRUD Application (17,337)
  • Login Form in JavaFX with MySQL Database (16,656)
  • A Complete CRUD Application with Spring MVC and MyBatis/iBatis (15,629)
  • Calculate AGE based on Date of birth using jQuery Calendar (12,166)
  • Complete CRUD Application in Spring MVC and Hibernate [XML Configuration] (11,607)

Categories

  • Angular 10 (2)
  • Angular 2 (2)
  • Angular 9 (7)
  • Boostrap 4 (9)
  • Core Java (16)
  • Core Java Programs (33)
  • CRUD Applications (33)
  • CSS (12)
  • Express.js (7)
  • Hibernate (24)
  • High Charts (3)
  • HTML (13)
  • Interview Programs (33)
  • Java Swings (4)
  • JavaFX (2)
  • Javascript (13)
  • Javascript Programs (20)
  • JPA (32)
  • jQuery (7)
  • JSP (16)
  • Mongoose (7)
  • MyBatis/iBatis (2)
  • Nodejs (7)
  • REST Services (47)
  • Servlets (2)
  • SOAP Services (1)
  • Spring Boot (65)
  • Spring MVC (46)
  • Testing (1)
  • Thymeleaf (5)
  • Uncategorized (2)
Copyright © 2021. Created by Bushan Sirgur. Powered by B2 Tech.
  • Facebook
  • Linkedin
  • Instagram
  • Youtube
  • Github
  • Home
  • Java
    • Core Java
    • Core Java Programs
    • Java Swings
    • JavaFX
  • Web Technologies
    • Angular 10
    • Angular 2
    • Angular 9
    • Boostrap 4
    • CSS
    • Express.js
    • High Charts
    • HTML
    • Javascript
    • Javascript Programs
    • jQuery
    • Mongoose
    • Nodejs
    • Typescript
  • Full Stack Applications
    • CRUD Applications
  • Advance Java/J2EE
    • JSP
    • Servlets
    • JSF
    • Thymeleaf
    • Spring MVC
    • Spring Boot
    • Spring Security
    • JPA
    • Hibernate
    • Struts
    • MyBatis/iBatis
  • Interview Programs
  • Web Services
    • REST Services
    • SOAP Services
  • Testing
  • About
  • Contact
  • Facebook
  • Twitter
  • Google Plus