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All questions are in C++1) Here is a function definitionvoid fu

All questions are in C++1) Here is a function definitionvoid fu

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All questions are in C++

1) Here is a function definition:

void func(int& i, int k)

{

i = 1;

k = 2;

}

Suppose that a main program has two integer variables x

and y and both are given the value 0. Then the main

program calls func(x,y); What are the values of x and y

after the function func finishes?

A. Both x and y still 0.

B. x is now 1, but y is still 0.

C. x is still 0, but y is now 2.

D. x is now 1, and y is now 2.

2) Here is a function prototype and some possible function

calls:

int sumOfThreeNumbers(int, int = 20, int = 30);

// Possible function calls:

cout << sumOfThreeNumbers ();

cout << sumOfThreeNumbers (23, 15);

cout << sumOfThreeNumbers (23, , -30);

cout << sumOfThreeNumbers (23, 15, -30);

How many of the above function calls are legal?

A. None of them is legal.

B. 1 of them is legal.

C. 2 of them are legal.

D. 3 of them are legal.

E. All of them are legal.

3) Is it possible for a member function of a class to

activate another member function of the same class?

A. No.

B. Yes, but only public member functions.

C. Yes, but only private member functions.

D. Yes, both public and private member functions can

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be activated within another member function.

4) Which of the following is a correct declaration of the

extraction operator >> overloading function for a class

MyClass?

A. void operator>>(istream& isObj);

B. istream& operator>>(istream& isObj);

C. friend void operator>>(istream& isObj, MyClass&

obj);

D. friend istream& operator>>(istream& isObj,

MyClass& obj);

5) Here is the start of a class declaration:

class ClassA

{

public:

void func1(const ClassA& a);

void func2(ClassA& a) const;

void func3(ClassA a) const;

...

Which of the three member functions can alter the private

member variables of the ClassA object that activates the

function?

A. None of the three functions.

B. Only func1.

C. Only func2.

D. Only func3.

E. Only two of the three functions.

Solution

1) Here is a function definition:

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All questions are in C++ 1) Here is a function definition: void func(int& i, int k) { i = 1; k = 2; } Suppose that a main program has two integer variables x and y and both are given the value 0. Then the main program calls func(x,y); What are the values of x and y after the function func finishes? A. Both x and y still 0. B. x is now 1, but y is still 0. C. x is still 0, but y is now 2. D. x is now 1, and y is now 2. 2) Here is a function prototype and some possible function calls: int sumOfThreeNumbers(int, int = 20, int = 30); // Possible function calls: cout (istream& isObj); B. istream& operator>>(istream& isObj); C. friend void operator>>(istream& isObj, MyClas s& obj); D. friend istream& operator>>(istream& isObj, MyClass& obj); 5) ...
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