C Programming Quiz level 2

What will be the output of the following code? #include int main() { int a = 5; int *p = &a; *p += *p * 2; printf("%d\n", a); return 0; }

• 5

• 10

• 15

• 20

What will be the output of the following code? #include int main() { int arr[] = {10, 20, 30, 40, 50}; int *ptr = arr + 2; printf("%d\n", *ptr); return 0; }

• 10

• 20

• 30

• 40

What will be the output of the following code? #include void update(int x) { x = x * 2; } int main() { int a = 10; update(a); printf("%d\n", a); return 0; }

• 10

• 20

• 0

• Compilation Error

What will be the output of the following code? #include int main() { int x = 5; // binary: 0101 int y = 9; // binary: 1001 printf("%d\n", x ^ y); return 0; }

• 12

• 14

• 4

• 0

What will be the output of the following code? #include int main() { int arr[2][2] = {{1, 2}, {3, 4}}; printf("%d\n", *(*(arr + 1) + 1)); return 0; }

• 1

• 2

• 3

• 4

What will be the output of the following code? #include int main() { char *ptr = "Hello"; ptr += 3; printf("%s\n", ptr); return 0; }

• Hello

• lo

• llo

• Syntax Error

What will be the output of the following code? #include int main() { int a = 1, b = 0, c = 3; if (a || ++b && c) { c += a; } printf("%d\n", c); return 0; }

• 3

• 4

• 5

• Compilation Error

What will be the output of the following code? #include void change(int *x) { *x = *x + 5; } int main() { int a = 10; change(&a); printf("%d\n", a); return 0; }

• 10

• 5

• 15

• Undefined Behavior

What will be the output of the following code? #include int main() { char str[6] = "Hello"; printf("%c\n", str[5]); return 0; }

• o

• \0 (null character)

• Undefined Behavior

• Compilation Error

What will be the output of the following code? #include int main() { int a = 8; a |= 2; a &= 6; printf("%d\n", a); return 0; }

• 2

• 8

• 6

• 0