Cpp Programming

[A]. An array of references is acceptable.
[B]. Once a reference variable has been defined to refer to a particular variable it can refer to any other variable.[C]. An array of references is not acceptable.
[D]. Reference is like a structure.

Answer: Option C

1. Pointer to a reference and reference to a pointer both are valid.
2. When we use reference, we are actually referring to a referent.

[A].Only 1 is correct.
[B].Only 2 is correct.[C].Both 1 and 2 are correct.
[D].Both 1 and 2 are incorrect.

Answer: Option C

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.

[A].Only 1 is correct.
[B].Only 2 is correct.[C].Both 1 and 2 are correct.
[D].Both 1 and 2 are incorrect.

Answer: Option C

 

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.

[A]. Only 1 is correct.
[B]. Only 2 is correct.[C]. Both 1 and 2 are correct.
[D]. Both 1 and 2 are incorrect.

Answer: Option A

1. Change a reference changes the referent.
2. 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.

Answer: Option A

[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.

Answer: Option B

[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.

Answer: Option B

[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.

Answer: Option D

[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.

Answer: Option C

 

[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.

Answer: Option C