Arrays C++ MCQ

1. Which of the following correctly declares an array?
a) int array[10];
b) int array;
c) array{10};
d) array array[10];

Answer:a

2. What is the index number of the last element of an array with 9 elements?
a) 9
b) 8
c) 0
d) Programmer-defined

Answer:b

3. What is a array?
a) An array is a series of elements of the same type in contiguous memory locations
b) An array is a series of element
c) An array is a series of elements of the same type placed in non-contiguous memory locations
d) None of the mentioned

Answer:a

4. Which of the following accesses the seventh element stored in array?
a) array[6];
b) array[7];
c) array(7);
d) array;

Answer:a

5. Which of the following gives the memory address of the first element in array?
a) array[0];
b) array[1];
c) array(2);
d) array;

Answer:d

6. What will be the output of this program?

1.     #include <stdio.h>

2.     using namespace std;

3.     int array1[] = {1200, 200, 2300, 1230, 1543};

4.     int array2[] = {12, 14, 16, 18, 20};

5.     int temp, result = 0;

6.     int main()

7.     {

8.         for (temp = 0; temp < 5; temp++) {

9.             result += array1[temp];

10.         }

11.         for (temp = 0; temp < 4; temp++) {

12.             result += array2[temp];

13.         }

14.         cout << result;

15.         return 0;

16.     }

a) 6553
b) 6533
c) 6522
d) 12200

Answer:b

7. What will be the output of the this program?

1.     #include <stdio.h>

2.     using namespace std;

3.     int main ()

4.     {

5.         int array[] = {0, 2, 4, 6, 7, 5, 3};

6.         int n, result = 0;

7.         for (n = 0 ;n < 8 ;n++) {

8.             result += array[n];

9.         }

10.         cout << result;

11.         return 0;

12.     }

a) 25
b) 26
c) 27
d) None of the mentioned

Answer:c

8. What is the output of this program?

1.     #include <stdio.h>

2.     using namespace std;

3.     int main()

4.     {

5.         int a = 5, b = 10, c = 15;

6.         int arr[3] = {&a, &b, &c};

7.         cout << *arr[*arr[1] - 8];

8.         return 0;

9.     }

a) 15
b) 18
c) garbage value
d) compile time error

Answer:d

9. What is the output of this program?

1.     #include <stdio.h>

2.     using namespace std;

3.     int main()

4.     {

5.         char str[5] = "ABC";

6.         cout << str[3];

7.         cout << str;

8.         return 0;

9.     }

a) ABC
b) ABCD
c) AB
d) None of the mentioned

Answer:a

10. What is the output of this program?

1.     #include <stdio.h>

2.     using namespace std;

3.     int main()

4.     {

5.         int array[] = {10, 20, 30};

6.         cout << -2[array];

7.         return 0;

8.     }

a) -15
b) -30
c) compile time error
d) garbage value

Answer:b