For a class foo, one difference between a variable declared foo * and a variable declared foo & is that only the variable declared foo & can potentially have the value null.
select one:
a. false
b. true

False.

Explanation:

When we declare a variable as reference type we have to initialize that variable otherwise the compiler will give error that the reference variable is not initialized.You also cannot initialize the variable Foo& with NULL value because it is a reference variable and we have to initialize it.

On the other there is no need to initialize the variable Foo * since it is a pointer it can also store NULL value.

So the answer is only Foo* can store NULL value not Foo &.

answer; always; never;