What does the at() method in the string class do?It appends a character at the end of the string.It removes the last character of the string.It returns the character at the specified position.It finds the first occurrence of a character.

The library function used to find the last occurrence of a character in a string is

2.Question 2What is the result when .upper() is applied to a string?1 pointThe value of the string is reassigned to the value of the string in the line preceding it.A copy of the string is returned with all uppercase letters.The character that appears most frequently in the string is extracted from it and returned.The value of the string is reassigned to contain all uppercase letters.

What does this method do?        public static void cutUp(String word, char [ ] letter)        {               if (letter.length >= word.length( ) )                  for (int i = 0; i < word.length( ); i++)                    letter[i] = word.charAt(i);         }

In C++, atof () function is used to convert ________.

What is the purpose of the following Java method?String DoSomething(String input){        StringBuilder output = new StringBuilder();        char[] charArray = input.toCharArray();         for(char c : charArray) {            if (!Character.isWhitespace(c))            output.append(c); }    return output.toString();}AAppends extra white space in between the words in the given stringBRemoves the longest words in th