String Interview Questions

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Difficulty	Question Title	Company Name	Category
Medium	Scramble String	Amazon Fanatics Samsung	string
Easy	Valid Anagrams	Amazon Goldman Sachs Google Microsoft Nagarro	string
Medium	Group Anagrams	Amazon Facebook Google Microsoft	string
Hard	Integer to English words	Amazon Facebook Microsoft Oracle	string
Hard	Smallest Good Base	Google	string
Medium	Minimum insertions to form a palindrome with permutations allowed	Amazon CodeNation Directi Google Indeed Intuit	string
Medium	Longest Substring Without Repeating Characters	Adobe Alation Amazon Apple Bloomberg ByteDance Cisco eBay Expedia Facebook Goldman Sachs Google Microsoft Morgan Stanley Oracle SAP SAP Labs Spotify Uber VMware Yahoo	string
Medium	Form minimum number from given sequence	Accolite Amazon Fanatics Goldman Sachs Info Edge Snapchat	string
Medium	Delete consecutive same words in a sequence	Factset	string
Hard	Text Justification	Amazon Coursera Google Indeed LinkedIn Microsoft Pinterest Snapchat	string
Easy	Reverse individual words	Amazon	string
Medium	Rearrange a binary string as alternate x and y occurrences	Accolite Cisco Citrix Hike IBM Info Edge Pinterest Roblox Tesla	string
Easy	Arrange given numbers to form the biggest number	Amazon MakeMyTrip Paytm Zoho	string
Easy	Reverse Integer	MakeMyTrip MAQ	string
Easy	Reverse words in a string	Accolite Adobe Amazon Cisco Goldman Sachs MakeMyTrip MAQ Microsoft Morgan Stanley Paytm PayU SAP Labs Wipro Zoho	string
Easy	Reverse a String	Infosys MAQ o9 solutions TCS	string
Easy	Convert String To Int	MAQ	string
Hard	Shortest Palindrome	Amazon Delhivery Factset	string
Easy	Reverse Bits	Apple Google Samsung	string
Hard	Edit Distance	Amazon ByteDance Facebook Google Microsoft Palantir Technologies Square	string
Hard	Substring With Concatenation Of All Words	Amazon DE Shaw	string
Medium	Top K Frequent Words	Accolite Fourkites Infosys	string
Medium	Expression Contains Redundant Bracket or Not	Amazon Paytm	string
Medium	Zigzag Conversion	PayPal	string
Easy	Valid Palindrome	Infosys MAQ Nokia o9 solutions	string
Medium	Valid Parenthesis String	Amazon Facebook Oracle	string
Medium	Next Permutation	Adobe Amazon Apple Bloomberg ByteDance Facebook Factset Flipkart Google Microsoft Morgan Stanley Salesforce Uber	string
Easy	Repeated Substring Pattern	Amazon Google	string
Medium	Letter Case Permutation	Amazon Bloomberg Spotify	string
Easy	Longest Common Prefix using Sorting	Adobe Amazon Apple Bloomberg eBay Facebook Google Microsoft	string
Easy	Word Pattern	Amazon Capital One	string
Hard	Regular Expression Matching	Adobe Amazon Apple Bloomberg Coursera eBay Facebook Goldman Sachs Google Microsoft	string
Medium	Reorganize String	Amazon eBay Facebook Google Microsoft Qualtrics	string
Medium	String Compression	Amazon Apple Citrix Expedia Facebook Goldman Sachs IBM Microsoft Yandex	string
Easy	Valid Parentheses	Adobe Amazon Apple Bloomberg ByteDance Expedia Facebook Goldman Sachs Google IBM lyft Microsoft Oracle Spotify Zillow	string
Hard	Longest Common Prefix using Trie	Adobe Amazon Apple Bloomberg eBay Facebook Google Microsoft	string
Hard	Valid Number	Amazon Facebook LinkedIn Oracle	string
Hard	Find the Closest Palindrome number	Amazon Apple	string
Easy	Count and Say	Amazon Apple Bloomberg Facebook Google Microsoft VMware	string
Easy	Find unique character in a string	Amazon Apple Bloomberg Facebook Goldman Sachs Google Microsoft Oracle Zillow	string
Medium	Integer to Roman	Amazon Apple Bloomberg Microsoft Oracle	string
Hard	Rabin Karp Algorithm	Accolite Amazon MakeMyTrip MAQ Oracle PayU	string
Easy	Isomorphic Strings	Amazon Apple Facebook Intel	string
Easy	String comparison containing wildcards	Accenture Amazon Ola Cabs	string
Medium	Check whether Strings are K Distance Apart or Not	Amazon Deutsche Bank Facebook GE Healthcare Microsoft	string
Easy	Program to Toggle all Characters in a String	Capgemini InfoEdge MAQ Oxigen Wallet	string
Easy	Check length of a String is Equal to the Number Appended at its Last	CodeNation Fourkites Microsoft UHG Optum	string
Easy	Generate all Binary Strings Without Consecutive 1’s	Amazon GE Healthcare Snapdeal	string
Medium	Check if all Rows of a Matrix are Circular Rotations of Each Other	Accenture Cadence India Citadel FreeCharge Microsoft Pinterest	string
Easy	Sort a String According to Another String	Accenture Accolite Adobe Amazon FreeCharge InfoEdge Microsoft Salesforce	string
Medium	Check if String can Become Empty by Recursively Deleting given Substring	Adobe Delhivery GE Healthcare MakeMyTrip ServiceNow Spotify UHG Optum	string
Easy	Smallest Palindrome after Replacement	Adobe Arcesium Flipkart GE Healthcare ZScaler	string
Medium	Check if String Follows Order of Characters by a Pattern or not	Adobe Amazon GreyOrange InfoEdge Microsoft	string
Easy	Split Four Distinct Strings	Accenture Adobe GoDaddy Grofers Honeywell Splunk	string
Easy	Even Substring Count	Coursera Deutsche Bank OYO Rooms Yahoo Yandex Zoho	string
Medium	Reverse String Without Temporary Variable	Adobe Amazon Google Hulu Microsoft Moonfrog Labs	string
Easy	Recursive Palindrome Check	Capgemini Factset Infosys MAQ o9 solutions Oracle Square	string
Easy	Minimum Characters to be Removed to Make a Binary String Alternate	Coursera Fourkites Hike MAQ o9 solutions Pocket Gems Taxi4Sure	string
Medium	Print all Palindromic Partitions of a String	Amazon Facebook Google	string
	Count of character pairs at same distance as in english alphabets		string
	Minimum characters to be added at front to make string palindrome		string
	Convert a string that is repetition of a substring of length k		string
	Nth character in Concatenated Decimal string		string
	Kth Non-repeating character		string
	Compare two version numbers		string
	Remove minimum characters so that two strings become anagrams		string
	Generate all binary strings from given pattern		string
	Print all possible ways to break a string in bracket form		string
	Caesar Cipher		string
	Longest common subsequence withpermutations		string
	Perfect reversible string		string
	Longest palindrome can be formed by removing or rearranging characters		string
	Longest common prefix (word by word)		string
	Longest common prefix (Character by character)		string
	Permutations (STL)		string
	Calculate sum of all numbers present in a string		string
	Longest Common Prefix (Using Divide and Conquer)		string
	Lower Case To Upper Case		string
	Longest Common Prefix (Using Biary Search)		string
	Print shortest path to print a string on screen		string
	Remove Extra Spaces from a string		string
	Change gender of a given string		string
	Count number of substrings with k distinct characaters		string
	Removing spaces from a string using stringstream		string
	PANGRAM CHECK		string
	Repeated subsequence of length 2 or more		string
	Palindrome permutations of a string		string
	Split a string		string
	1`s and 2`s complement of binary number		string
	Longest Common Extension		string
	Convert string1 to string2 in one edit		string
	Find First non-repeating character in a string		string
	Remove recurring digits in a given number		string
	Recursively print all the sentences that can be formed from list of word lists		string
	Online algorithm for checking palindrome in a stream		string
	Check if two given strings are isomorphic to each other		string
	Length of longest valid substring		string
	Program to add two binary digits		string
	Recursive Implementation of atoi()		string
	Reverse a string without affecting special characters		string
	Recursive function to do substring search		string
	Print Longest common subsequence		string
	Rotate string to get lexicographically minimum string		string
	Number of sub-strings which recursively add up to 9		string
	Palindrome string (number)		string
	Print all possible words from phone digits		string
	Shortest Superstring Problem		string
	Transform one string to another using minimum number of given operations		string
	Print string of odd length in ‘X’ format		string
	Minimum insertions to form a shortest palindrome		string
	print all palindromic partitions		string
	Check rearranged string can form a palindrome		string
	Palindromes in a given range		string
	String(represents an integer) to value		string
	Count the number of words		string
	Print all anagrams together in a sequence of words		string
	Lexicographic rank of string		string
	Remove spaces from a string		string
	Find, second, frequent, character		string
	Find the second most frequent character		string
	Check if a given string is a rotation of a palindrome		string
	Sort an array of strings		string
	Recursively remove all adjacent duplicates		string
	Remove ‘b’ and ‘ac’ from a given string		string
	wildcard character matching		string
	Longest Palindromic Substring		string
	Given string is interleaving of two other strings or not		string
	Print all permutations with repetition		string
	Run length encoding		string
	List items containing all characters of a given word		string
	Write a program to print all permutations of a given string		string
	Check whether two strings are anagram of each other		string
	Print all interleavings of given two strings		string
	Print all duplicates in the input string		string
	A Program to check if strings are rotations of each other or not		string
	Given a string find its first non-repeating character		string
	Reverse words in a given string		string
	Find the smallest window in a string containing all characters of another string		string
	Divide a string in N equal parts		string
	Print Reverse of a string (Recursion)		string
	Remove characters from first string which are in second		string
	Sorting the array of strings		string
	Remove duplicates from a string		string
	Concatenation of two strings		string
	Reverse a String		string
	Most repeating character in a string		string