A palindrome is a string that reads the same from left to right as it does from

Question

A palindrome is a string that reads the same from left to right as it does from right to left. Examples include "bob", "abba", "kayak", "Hannah", racecar, "kinnikinnik", and "10101010101". Note that the string "a b a" is not a palindrome, but the string "a b a" is because spaces matter. Is the following code correct? If correct, explain. If not, explain and provide a relevant example.//pre: s is a palindrome//post: rv is the reverse of s://rv.charAt(0) == s.charAt(s.length()-1) &&//rv.charAt(1) == s.charAt(s.length()-2) &&//...//rv.charAt(s.length()-1) == s.charAt(theta) &&//rv.length() == s.length() public String reverse(String s) {return s;} What value does reverse("abcd") return?

Explanation / Answer

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a)
Yes. Given code is correct.

Because, reverse(s) returns the input parameter itself(without any change)

So, we have
   S and its reverse RV(that isequal to S according to given function)

   Note: S == RV

   So to check palindrome

   first character of RV should be equal to last character of S
   second character of RV should be equal to second last character of S

   So on

   last character of RV shouldbe equal to first character of S

b)
   reverse("abcd") return "abcd" itself(input parameters)

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