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Pick out the correct statement about string template. Which Hadoop component is responsible for managing user authentication and access control? What is a port number in Java Networking? Which of the following can be the base case for the recursive implementation used to find the length of linked list? #include<stdio.h> #include<stdlib.h> struct Node { int val; struct Node *next; }*head; int get_len() { struct Node *temp = head->next; int len = 0; while(temp != 0) { len++; temp = temp->next; } return len; } int main() { int arr[10] = {1,2,3,4,5}, n = 5, i; struct Node *temp, *newNode; head = (struct Node*)malloc(sizeof(struct Node)); head->next = 0; int len = get_len(); printf("%d",len); return 0; } What is the role of the MessageBox class in C# Windows Forms Applications?