Kth element from last in linked list problem

#1

https://ide.geeksforgeeks.org/FNitKtYs8x----what’s the error in my code please help me in correcting it as one test case is showing correct but not passing

#2

in your if condition
if (k < 0 || k > this.size - 1) {
throw new Exception(“Invalid value of k”);
}
k can’t be this.size, but according to problem statement when k = this.size, it should return first element.
change condition to k>this.size here.
Thanks