Functions can be declared to return a reference type. There are reasons to make

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

Correct Answer

Both 1 and 2 are correct.

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1. Which of the following statement is correct?
Options
A. A referenced has to be de-referenced to access a value.
B. A referenced does not need to be de-referenced to access a value.
C. A referenced has to be double de-referenced to access a value.
D. Whether a reference should be de-referenced or not depends on the type of the reference.

2. Which of the following statement is correct about the references?
Options
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.

4. Which of the following statements is correct?
1. Once the variable and the reference are linked they are tied together.
2. Once the reference of a variable is declared another reference of that variable is not allowed.
Options
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 statements is correct?
1. We can return a global variable by reference.
2. We cannot return a local variable by reference.
Options
A. Only 1 is correct.
B. Only 2 is correct.
C. Both 1 and 2 are correct.
D. Both 1 and 2 are incorrect.

6. Which of the following statement is correct?
Options
A. Once a reference variable has been defined to refer to a particular variable it can refer to any other variable.
B. A reference is indicated by using && operator.
C. Once a reference variable has been defined to refer to a particular variable it cannot refer to any other variable.
D. A reference can be declared beforehand and initialized later.

7. Which of the following statements is correct?
1. An array of references is acceptable.
2. We can also create a reference to a reference.
Options
A. Only 1 is correct.
B. Only 2 is correct.
C. Both 1 and 2 are correct.
D. Both 1 and 2 are incorrect.

8. Which of the following statement is correct?
Options
A. A reference is declared using * operator.
B. Once a reference variable has been defined to refer to a particular variable it can refer to any other variable.
C. A reference must always be initialized within classes.
D. A variable can have multiple references.

9. Which of the following statement is correct?
Options
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.

10. Which of the following statement is correct?
Options
A. A reference is a constant pointer.
B. A reference is not a constant pointer.
C. An array of references is acceptable.
D. It is possible to create a reference to a reference.

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