Question

11. What is the output of the following program fragment?

int v[5] = {10, 20, 30, 40, 50}; for (int i=3; i>0; i--)

{

cout << v[i] << " ";

}

A. 102030

B. 302010

C. 403020

D. 40302010

12. Given the following code:

char a[20];

char b[30];

Copy(a, b); // Copy all elements of b into a

What is the best signature (header) of the Copy function?

A. void Copy(char x[], char y[])

B. void Copy(const char x[], char y[])

C. void Copy(char x[], const char y[])

D. void Copy(const char x[], const char y[])

13. Given the following array declaration:

int age[10];

Which of the following loops zeros out the age array?

A. for (int i = 0; i < 10; i++) age[i] =0;

B. for (int i = 1; i <= 10; i++) age[i] =0;

C. for (int i = 1; i < 11; i++) age[i] =0;

D. for (int i = 0; i <= 10; i++) age[i] =0;

Answer 1

11. What is the output of the following program fragment?

Answer: C. 403020

For loop will run i value from 3 to 1. Here i indicates index in array.

i=3 value indicates 4th element in array that is 40.

i=2 value indicates 3th element in array that is 30.

i=1 value indicates 2th element in array that is 20.

Question 12

Answer: C. void Copy(char x[], const char y[])

Option C is best signature because we are changing the values in array a not in b.

Question 13

Answer: A. for (int i = 0; i < 10; i++) age[i] =0;

this for loop will run from i value 0 to 9. array size is 10. Index will start from 0 to 9.

So this loop will all elements in array with zero.