DSA quiz

#include <stdio.h>

int main() {

int a = 5;

int b = a+++a;

printf("%d", b);

return 0;

}

What happens?

• Prints 11

• Prints 10

• Compile error

• Runtime error

#include <iostream>

using namespace std;

int main() {

int arr[3] = {1, 2, 3};

cout << arr[3];

return 0;

}

What happens?

• Prints 0

• Undefined behavior (may print garbage)

• Compile error

• Prints 3

#include <stdio.h>

int main() {

char str[5] = "Hello";

printf("%s", str);

return 0;

}

What happens?

• Prints Hello

• Compile error: string too long
  

• Prints Hell

• Runtime error

#include <iostream>

using namespace std;

int main() {

int *p = NULL;

cout << *p;

}

• Prints 0

• Prints garbage

• Compile error

• Runtime segmentation fault

#include <stdio.h>

int main() {

int x = 10;

printf("%d", ++x++);

return 0;

}

• Prints 12

• Compile error

• Prints 11

• Undefined behavior

#include <iostream>

using namespace std;

int main() {

string s = "abc";

s[3] = 'd';

cout << s;

}

• Prints abcd

• Runtime error

• Prints abc

• Prints garbage

#include <stdio.h>

int main() {

int a = 5, b = 2;

printf("%d", a+++b);

return 0;

}

• 8

• 7

• 6

• Compile error

#include <iostream>

using namespace std;

int main() {

int a = 10;

cout << a++ + ++a;

}

• 22

• 21

• 20
  

• Undefined behavior

#include <stdio.h>

int main() {

int arr[] = {1, 2, 3, 4};

printf("%d", *(arr + 2));

}

• 2

• 3

• 4

• Compile error

#include <iostream>

using namespace std;

int main() {

string str = "Hello";

cout << str.length();

}

• 4

• 5

• 6

• Compile error