Answer:
Explanation:
A null pointer is pointing to nothing, if we can detect if a pointer is null, we can use an "IF" because a null pointer always going to be false, a null pointer even can block an application, because is a result of undefined behavior, it can even cause problems because the compiler can’t tell whether we mean a null pointer or the integer 0, there is a confusion in this kind of pointers.
Answer:
B
Explanation:
POP3 protocol is an email protocol that works by downloading and storing emails onto a user's device or tablet.
Answer:
B
Explanation:
because you need to exercise and eat or drink less calories
