- Find Most Frequent Character of the String.
- Check Anagram Strings.
- Check Whether Given String is Palindromic Anagram or Not.
- Check Whether Given String is Panagram or Not.
- Find First Non-Repeating Character of the String.
- Find Most Frequent Element of the Array.
- Find Pair in an Array with Given Sum.
- Find First Repeating Element of an Array.
- Find Majority Element of an Array.