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(solution) Write an efficient Java/C/Python/Ruby program to return the duplicate characters from given String, for example if given String is Similarly, if input is "Java and Java Script" then your program should print "J", "a" and "v". 4) How to remove characters from the first String which are present in the second String?(solution) Write an efficient Java/c/Python function that takes two strings as arguments and removes the characters from the first string which are present in the second string.
In a real interview, an interviewer is as much interested in the solution as on improvement and optimization.
In order to improve the solution, good knowledge of data structure is mandatory because in many cases a choice of good data structure not only make the solution simple but also fast.
But, in Java, String is an object, which holds data in character array.
This means you can solve many String based problem by assuming it as a character array.
A string is one of the most popular data structure, probably next to the array and that's why you will find at least one question from String in any programming job interview.
If you don't know, String is nothing but a character array in most of the language like C.Since coding and problem solving is an important part of any programming job interview, it's imperative that you know how to solve them in time and on pressure situation, which comes only after doing practice with a right set of questions.Since these questions are already tried and tested and appeared in many interviews, they will provide you the experience you need to crack your coding interview.In this article, I am going to share 21 of the most common String based Programming and Coding interview questions from Java developer interviews.These questions require you to write code to solve the problem and they are different from traditional Java String questions like how substring method works in Java or when to use the intern() method of String in Java?For example, if the first String "India is great" and second String is "in" then output should be "da s great" 5) How to check if two strings are rotations of each other?(solution) Write an efficient program to test if two given String is a rotation of each other or not e.g.You can use all the tips and tricks you learned by solving array based coding question to also solve String e.g.reversing a String is the same as reversing an array and so on.For example, if the input is "Java is best" then your program should print "best is Java". 11) How to find the smallest substring in a given string containing all characters of another string?(solution) Write an efficient function in C/C or Java to print the smallest substring in a given String containing all characters of another String.