String Interview Questions
663 real interview questions test String. Practice any of them in the code editor and get AI feedback on your solution.
- Junior30% (202)
- Mid/Senior48% (317)
- Staff22% (144)
Companies that ask String the most
Questionspage 2 of 7
- Reverse Substrings Between Each Pair of Parentheses9 companiesMid/Senior
- Number of Ways to Form a Target String Given a Dictionary9 companiesStaff
- Count Vowel Strings in Ranges9 companiesMid/Senior
- Length of Last Word8 companiesJunior
- Excel Sheet Column Title8 companiesJunior
- Repeated Substring Pattern8 companiesJunior
- Find the Closest Palindrome8 companiesStaff
- Number of Atoms8 companiesStaff
- Number of Matching Subsequences8 companiesMid/Senior
- Minimum Add to Make Parentheses Valid8 companiesMid/Senior
- Verifying an Alien Dictionary8 companiesJunior
- Greatest Common Divisor of Strings8 companiesJunior
- Parsing A Boolean Expression8 companiesStaff
- Smallest String With Swaps8 companiesMid/Senior
- Remove Sub-Folders from the Filesystem8 companiesMid/Senior
- Longest Happy String8 companiesMid/Senior
- Find Resultant Array After Removing Anagrams8 companiesJunior
- Maximum Palindromes After Operations8 companiesMid/Senior
- Valid Word8 companiesJunior
- Valid Number7 companiesStaff
- Repeated DNA Sequences7 companiesMid/Senior
- Binary Tree Paths7 companiesJunior
- Expression Add Operators7 companiesStaff
- Palindrome Pairs7 companiesStaff
- Zuma Game7 companiesStaff
- Reverse String II7 companiesJunior
- Find Duplicate File in System7 companiesMid/Senior
- Letter Case Permutation7 companiesMid/Senior
- Vowel Spellchecker7 companiesMid/Senior
- Longest Duplicate Substring7 companiesStaff
- Defanging an IP Address7 companiesJunior
- Find Words That Can Be Formed by Characters7 companiesJunior
- Invalid Transactions7 companiesMid/Senior
- Rank Teams by Votes7 companiesMid/Senior
- Number of Steps to Reduce a Number in Binary Representation to One7 companiesMid/Senior
- Maximum Nesting Depth of the Parentheses7 companiesJunior
- Minimum Deletions to Make String Balanced7 companiesMid/Senior
- Determine if Two Strings Are Close7 companiesMid/Senior
- Maximum Score From Removing Substrings7 companiesMid/Senior
- Step-By-Step Directions From a Binary Tree Node to Another7 companiesMid/Senior
- Check if a Parentheses String Can Be Valid7 companiesMid/Senior
- String Compression III7 companiesMid/Senior
- Lexicographically Minimum String After Removing Stars7 companiesMid/Senior
- Find the Original Typed String I7 companiesJunior
- Scramble String6 companiesStaff
- Different Ways to Add Parentheses6 companiesMid/Senior
- Bulls and Cows6 companiesMid/Senior
- Find the Difference6 companiesJunior
- Convert a Number to Hexadecimal6 companiesJunior
- Strong Password Checker6 companiesStaff
- Minimum Genetic Mutation6 companiesMid/Senior
- Reverse Words in a String III6 companiesJunior
- Dota2 Senate6 companiesMid/Senior
- Repeated String Match6 companiesMid/Senior
- Jewels and Stones6 companiesJunior
- Custom Sort String6 companiesMid/Senior
- Push Dominoes6 companiesMid/Senior
- Word Subsets6 companiesMid/Senior
- Reverse Only Letters6 companiesJunior
- Long Pressed Name6 companiesJunior
- Satisfiability of Equality Equations6 companiesMid/Senior
- Find Common Characters6 companiesJunior
- Remove Outermost Parentheses6 companiesJunior
- Maximum Length of a Concatenated String with Unique Characters6 companiesMid/Senior
- Maximum Number of Occurrences of a Substring6 companiesMid/Senior
- Minimum Insertion Steps to Make a String Palindrome6 companiesStaff
- Break a Palindrome6 companiesMid/Senior
- Number of Substrings Containing All Three Characters6 companiesMid/Senior
- Find the Longest Substring Containing Vowels in Even Counts6 companiesMid/Senior
- Construct K Palindrome Strings6 companiesMid/Senior
- Check If a Word Occurs As a Prefix of Any Word in a Sentence6 companiesJunior
- Minimum Deletions to Make Character Frequencies Unique6 companiesMid/Senior
- Maximum Repeating Substring6 companiesJunior
- Minimum Changes To Make Alternating Binary String6 companiesJunior
- Minimum Number of Operations to Move All Balls to Each Box6 companiesMid/Senior
- Sum of Beauty of All Substrings6 companiesMid/Senior
- Check if the Sentence Is Pangram6 companiesJunior
- Largest Odd Number in String6 companiesJunior
- Delete Duplicate Folders in System6 companiesStaff
- Delete Characters to Make Fancy String6 companiesJunior
- Final Value of Variable After Performing Operations6 companiesJunior
- Longest Palindrome by Concatenating Two Letter Words6 companiesMid/Senior
- Construct String With Repeat Limit6 companiesMid/Senior
- Remove Digit From Number to Maximize Result6 companiesJunior
- Shifting Letters II6 companiesMid/Senior
- Using a Robot to Print the Lexicographically Smallest String6 companiesMid/Senior
- Find Words Containing Character6 companiesJunior
- Count Prefix and Suffix Pairs I6 companiesJunior
- Maximum Difference Between Even and Odd Frequency II6 companiesStaff
- Longest Balanced Substring II6 companiesMid/Senior
- Ones and Zeroes5 companiesMid/Senior
- Fraction Addition and Subtraction5 companiesMid/Senior
- Replace Words5 companiesMid/Senior
- Robot Return to Origin5 companiesJunior
- Count Different Palindromic Subsequences5 companiesStaff
- Most Common Word5 companiesJunior
- Similar String Groups5 companiesStaff
- Score of Parentheses5 companiesMid/Senior
- Buddy Strings5 companiesJunior
- Decoded String at Index5 companiesMid/Senior