Check if two String is a rotation of each other? ( solution)ġ2. Reverse words in a given sentence without using any library method? ( solution)ġ1. Find all permutations of String? ( solution)ġ0. Count the occurrence of a given character in String? ( solution)ĩ. Count many vowels and consonants in a given String? ( solution)Ĩ. Find duplicate characters in a String? ( solution)ħ. Check if a String contains only digits? ( solution)Ħ. Reverse a given String using recursion? ( solution)ĥ. Print the first non-repeated character from String? ( solution)Ĥ. Check if two Strings are anagrams of each other? ( solution)ģ. Print duplicate characters from String? ( solution)Ģ.
Here is a list of some of the frequently asked String Interview Questions from Coding Interviews:ġ. In this category, you will find questions that require String manipulations, e.g., substring, reversing, searching, sorting, slicing and dicing, etc. From the C++ perspective, String is nothing but a null-terminated character array, but from the Java perspective, String is a full-fledged object backed by a character array. There is hardly an application written in Java and C++ that doesn't use String.
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You will see it right from your programming course, and you will use it throughout your professional project. The String is probably the most used data structure. This way, you can start with the topic you feel most comfortable with and slowly progress to the topic you want to improve. If you need to refresh your knowledge of data structure and algorithms, you can also take help from a good book, our course like Data Structures and Algorithms: Deep Dive Using Java, for quick reference.ġ00+ Data Structures and Algorithm Interview Questions with Solutionįor the sake of clarity and focus, I have categorized these data structure and algorithmic questions into various sub-categories, e.g., String questions, array-based questions, linked list questions, binary tree-related questions, searching and sorting based questions, and bit manipulation questions. If you are familiar with them, then try to solve them by hand and if you do not, then learn about them first and then solve them. I firmly believe that the interview teaches you a lot in a short time, and that's why I am sharing some frequently asked Data structure and algorithm questions from various Java interviews. As per my experience, there is a direct correlation between a programmer having a good command of the algorithm and being a good developer and coder.
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