For a macro shortcut key, which of the following is used before the letter?

Answer the following statements true (T) or false (F)

1. A pointer whose value is NULL does not point to anything. 2. A newly declared pointer variable has a default value of NULL. 3. In C++, the programmer must explicitly deallocate memory. 4. If the value of the head pointer is NULL, the linked list is empty. 5. When you design an abstract data type, you concentrate on what its operations do and how you will implement them.

What year was the C language standardized by ANSI?

A. 197 B. 1989 C. 1988 D. 1990