String related interview questions

→How do you print duplicate characters from a string?

→How do you check if two strings are anagrams of each other?

→How do you print the first non-repeated character from a string?

→How can a given string be reversed using recursion?

→How do you check if a string contains only digits?

→How are duplicate characters found in a string?

→How do you count a number of vowels and consonants in a given string?

→How do you count the occurrence of a given character in a string?

→How do you find all permutations of a string?

→How do you reverse words in a given sentence without using any library method?

→How do you check if two strings are a rotation of each other?

→How do you check if a given string is a palindrome?