References - C++

1.	Which of the following statement is correct?
	A. A reference is stored on heap. B. A reference is stored on stack. C. A reference is stored in a queue. D. A reference is stored in a binary tree.

2.	Which of the following statements is correct? Once a reference variable has been defined to refer to a particular variable it can refer to any other variable. A reference is not a constant pointer.
	A. Only 1 is correct. B. Only 2 is correct. C. Both 1 and 2 are correct. D. Both 1 and 2 are incorrect.

3.	Functions can be declared to return a reference type. There are reasons to make such a declaration/Which of the following reasons are correct? The information being returned is a large enough object that returning a reference is more efficient than returning a copy. The type of the function must be a R-value.
	A. Only 1 is correct. B. Only 2 is correct. C. Both 1 and 2 are correct. D. Both 1 and 2 are incorrect.

4.	Which of the following statements is correct? Change a reference changes the referent. We can create an array of references.
	A. Only 1 is correct. B. Only 2 is correct. C. Both 1 and 2 are correct. D. Both 1 and 2 are incorrect.

5.	Which of the following statement is correct about the references?
	A. A reference must always be initialized within functions. B. A reference must always be initialized outside all functions. C. A reference must always be initialized. D. Both A and C.