1. What is the output of the following code?

#include

int main() {

int a = 5;

int *p = &a;

*p = 10;

printf("%d", a);

return 0;

}

2. What is the value of x after this code?

int x = 5;

x += x++ + ++x;

3. What will be the output of the following code?
java
class Test {
public static void main(String[] args) {
String s1 = "abc";
String s2 = new String("abc");
System.out.println(s1 == s2);
}
}

4. A ridesharing application uses a Singleton class to manage its global configuration settings. What is a downside of this approach?

5. What will happen if you free a pointer twice?

6. What is the output of the following code?

#include

int main() {

int x = 5;

printf("%d", x = x == 5);

return 0;

}

7. What is the result of the following code?

#include

int main() {

int a = 10, b = 0;

int c = a / b;

printf("%d", c);

return 0;

}

8. What does the keyword override ensure?

9. What is the value of the expression 5 && 0 || 3 && 4?

10. An online shopping application has a Cart class that stores Product objects. How should this relationship be modeled?

11. Which of the following is true about volatile keyword in Java?

12. What is the output of this code?

int x = 5;

int &y = x;

y = 10;

std::cout << x;

13. A company requires an interface Employee with a calculateSalary() method for different roles like Manager and Engineer. Which concept is used here?

14. What is the output of the following code?
java
class Test {
public static void main(String[] args) {
int[][] arr = {{1, 2}, {3, 4}};
System.out.println(arr[1][1]);
}
}

15. Which type of memory is managed by std::allocator?

16. What is the default access modifier for members of a struct?

17. What will happen when this code runs?

#include

class A {

public:

A() { std::cout << "Constructor"; } ~A() { std::cout << "Destructor"; } }; int main() { A obj; return 0; }

18. What does std::future provide in C++?

19. What is the maximum size of a file that can be handled by fseek() in C?

20. How does Java handle recursion depth?