Intermediate Strings Interview Questions
Ready to go deeper? These 13 intermediate Strings interview questions bridge the gap between the basics and senior-level depth, focusing on the practical patterns and trade-offs interviewers probe for mid-level roles.
13 Strings questions
- 1StringBuilder vs StringBuffer vs String.Intermediate
- 2Find the longest palindromic substring.Intermediate
- 3Count total number of substrings in a string.Intermediate
- 4Find all permutations of a string.Intermediate
- 5Implement a basic version of 'atoi' (String to Integer).Intermediate
- 6Check if one string is a rotation of another.Intermediate
- 7String Compression (e.g., aabcccccaaa -> a2b1c5a3).Intermediate
- 8Longest Common Prefix among an array of strings.Intermediate
- 9Find the first non-repeating character in a string.Intermediate
- 10Check if two strings are Anagrams.Intermediate
- 11Strings Interview Question 2 (Free)Intermediate
- 12Strings Interview Question 5 (Free)Intermediate
- 13Strings Advanced Interview Question 8Intermediate
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Frequently asked questions
How many intermediate Strings interview questions are there?
This page covers 13 intermediate-level Strings interview questions, each with a short answer, a deeper explanation, code examples, common mistakes and follow-up questions.
Are these Strings questions suitable for intermediate interviews?
Yes. Every question is tagged intermediate difficulty and chosen to match what interviewers expect at that level, so you can focus your preparation without wading through questions that are too easy or too hard.
How should I practise these Strings questions?
Read the short answer first, attempt the question yourself, then expand the detailed explanation and real-world example. Review the common mistakes and follow-up questions to make sure you can handle interviewer probing.