How are strings represented in Java?Strings are instances of the class SignChain.Strings are instances of the class String.Strings are char arrays.Strings must be composed of individual chars.Clear my choice

What operations are defined for the strings in Java?concatenation with character strings and simple data types using Plussplitting of strings into parts of equal length by means of Split and a numberdeleting individual characters and components of a character string using minusduplication of strings by means of a mark

Which of the following is NOT a valid way to declare and initialize a string variable in Java?Question 5Answera.String str = "Hello";b.String str = new String("Hello");c.String str = 'Hello';d.char[ ] charArray = {'H', 'e', 'l', 'l', 'o'};String str = new String(charArray);

Consider the given code: class String_demo { public static void main(String args[]) { char arr[] = {'Q','W','E','R','T','Y}; } }Which among the following option will print QWERTYA) System.out.println(arr);B) System.out.println(arr.toString());C) new String(arr); System.out.println(str);D) System.out.println(Arrays.toString(arr));

ct the correct answerWhat will be the output of the following Java program?class String_demo {  public static void main(String args[])  {    char chars[] = {'f', 'o', 'r'};    String s = new String(chars);    System.out.println(s);  }}Optionsfrofor

Write a short note on StringBuffer class in java