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CS 010: Introduction to Computer Science I

Quiz 6: 10 minutes

Use the following function headers for the next 4 questions.

void func1(int x)

void func2(int &x)

Assuming there is an integer called num, are the following statements valid?

1. func2(25);
1. TRUE
2. FALSE

2. func1(num*20+3);
1. TRUE
2. FALSE

3. func1(rand()%100+1);
1. TRUE
2. FALSE

4. func2(num);
1. TRUE
2. FALSE

Specify the best passing technique for the following parameters.

5. double x = slope(myline);
1. Pass-by-value
2. Pass-by-reference

6. scale_rectangle(length, width, scale_amount); // Specify for the parameter length
1. Pass-by-value
2. Pass-by-reference

7. change_name(boss);
1. Pass-by-value
2. Pass-by-reference

8. Which of the following statements is NOT true?
1. A non-void function must have a return statement.
2. The return statement resumes execution in the main program.
3. A function can have more than one return statement.
4. It is legal to omit the return statement in a void function.
5. Functions can only return one value.

Use the code below for the next 2 questions.

void f1(int &x)

{

x = 100;

}

void f2(int &a, int b)

{

a = a * b;

b = 12;

if (b < a)

{

f1(b);

}

else

{

f1(a);

}

}

int main()

{

int num1 = 2;

int num2 = 4;

f2(num1, num2);

cout << num1 << “ “ << num2 << endl; // OUTPUT 1

num1 = 4;

num2 = 5;

f2(num1, num2);

cout << num1 << “ “ << num2 << endl; // OUTPUT 2

return 0;

}

9. What will OUTPUT 1 print?

1. 2 4
2. 100 4
3. 8 12
4. 100 12
5. None of the above

10. What will OUTPUT 2 print?
1. 20 5
2. 20 100
3. 4 5
4. 20 12
5. None of the above