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What does the ungetc function return for the following C expression? ungetc(c, fp);//where declarations are int c and FILE *fp What is the maximum value that can be stored in an 'int' data type in C++? A valid class name starts with a ......., followed by any number of letters, numbers, or underscores. 1. Number 2. Letter 3. Period 4. Underscore Consider the following code snippet to search an element in a linked list: struct Node { int val; struct Node* next; }*head; int linear_search(int value) { struct Node *temp = head->next; while(temp != 0) { if(temp->val == value) return 1; _________; } return 0; } Which of the following lines should be inserted to complete the above code? In Hadoop, what does the term "DataNode" represent?