C-Volution (Hard)

What is the output of the following code? #include int main() { int i, j; for (i = 1; i <= 5; i++) { for (j = 1; j <= i; j++) { printf("%d ", j); } printf("\n"); } return 0; }

• 1 1 2 1 2 3 1 2 3 4 1 2 3 4 5

• 1 2 2 3 3 3 4 4 4 4 5 5 5 5 5

• 1 2 3 4 5 1 2 3 4 1 2 3 1 2 1

• 1 2 3 4 5 2 3 4 5 3 4 5 4 5 5

What is the output of the following code? #include int main() { int i, j; for (i = 5; i >= 1; i--) { for (j = 1; j <= i; j++) { printf("*"); } printf("\n"); } return 0; }

• ***** **** *** ** *

• * ** *** **** *****

• ***** **** *** ** *

• * ** *** **** *****

What is the error in the following code? #include int main() { int *ptr; *ptr = 10; printf("%d\n", *ptr); return 0;}

• Missing #include directive.

• Dereferencing an uninitialized pointer.

• Incorrect format specifier in printf().

• No error.

What does the following code snippet do? #define SQUARE(x) x * x

• Defines a function named SQUARE.

• Defines a macro named SQUARE.

• Declares a variable named SQUARE.

• Includes a header file named SQUARE.

What is the output of the following code? #include int main() { int i, j; for (i = 1; i <= 4; i++) { for (j = 1; j <= 4; j++) { if (i + j == 5) { printf("*"); } else { printf(" "); } } printf("\n"); } return 0; }

• * * * * * * *

• **** **** **** ****

• * * * *

• Nothing will be printed.

What is the correct way to dynamically allocate memory for an array of 10 integers?

• int *arr = malloc(10 * sizeof(int));

• int *arr = calloc(10, sizeof(int));

• int *arr = new int[10];

• Both (a) and (b)

What is the output of the following code? #include int main() { int i = 1; do { printf("%d ", i); i++; } while (i <= 5); printf("\n"); return 0; }

• 1 2 3 4 5

• 1 2 3 4 5 6

• 1 2 3 4

• Infinite loop

What is the output of the following code? #include int main() { int n = 5; for (int i = 1; i <= n; i++) { for (int j = 1; j <= n; j++) { if (i == 1 || i == n || j == 1 || j == n) { printf("*"); } else { printf(" "); } } printf("\n"); } return 0; }

• ***** * * * * * * *****

• * * * * * * * * * * * * * * * *

• ***** ***** ***** ***** *****

• * ** *** **** *****

What is the output of the following code? #include int main() { int n = 4; for (int i = 1; i <= n; i++) { for (int j = 1; j <= i; j++) { printf("%c ", 'A' + j -1); } printf("\n"); } return 0; }

• A A B A B C A B C D

• A B C D E F G H I J

• A B B C C C D D D D

• A A B A B C A B C D

What is the output of the following code? #include int main() { int i, j; for (i = 1; i <= 5; i++) { for (j = 1; j <= i; j++) { printf("%d ", j); } printf("\n"); } return 0; }

• 1 1 2 1 2 3 1 2 3 4 1 2 3 4 5

• 1 2 2 3 3 3 4 4 4 4 5 5 5 5 5

• 1 2 3 4 5 1 2 3 4 1 2 3 1 2 1

• 1 2 3 4 5 2 3 4 5 3 4 5 4 5 5