Pointers Interview Questions

    Question 1: C++ Pointer Declaration

    Which of the following is the correct way to declare a pointer to an integer in C++?

    Question 2: C++ Guess the Output – Dereferencing

    What will this code print?

    #include <iostream>
using namespace std;

int main() {
    int x = 10;
    int *ptr = &x;
    cout << *ptr;
    return 0;
}

    Question 3: C++ Address-of Operator

    What does the & operator do in the context of pointers?

    Question 4: C++ Guess the Output – Pointer and Variable

    What will be the output of this program?

    #include <iostream>
using namespace std;

int main() {
    int num = 25;
    int *p = #
    cout << &num << " " << p;
    return 0;
}

    Question 5: C++ Null Pointer

    How can we assign a null value to a pointer in modern C++?

    Question 6: C++ Guess the Output – Pointer Arithmetic

    What will be the output of this program?

    #include <iostream>
using namespace std;

int main() {
    int arr[3] = {10, 20, 30};
    int *p = arr;
    cout << *(p + 2);
    return 0;
}

    Question 7: C++ Pointer to Pointer

    What is the correct way to declare a pointer to a pointer of an integer?

    Question 8: C++ Guess the Output – Double Pointer

    What will the following program print?

    #include <iostream>
using namespace std;

int main() {
    int val = 50;
    int *p = &val;
    int **pp = &p;
    cout << **pp;
    return 0;
}

    Question 9: C++ Pointers and Arrays

    Which of the following statements is true about arrays and pointers in C++?

    Question 10: C++ Guess the Output – Pointer Size

    What will the output of the following program be (on a 64-bit system)?

    #include <iostream>
using namespace std;

int main() {
    int *p;
    double *q;
    cout << sizeof(p) << " " << sizeof(q);
    return 0;
}