What is a string

Answer 1

It's a sequence of characters and also a immutable object means you can not modify it.

An array of characters works same as Java string. 

Example:-

char[] ch={'j','a','v','a','t','p','o','i','n','t'};  

String s=new String(ch);  

is same as

String s = "javatpoint";

Answer 2

String is a text object.
Often represented as sequence of characters between a pair of " " or ' '.

Answer 3

it's a word or sentence