References Easy Questions and Answers

Which is used to do the dereferencing?

Correct Option: D

Dereferencing is using a pointer with asterix. For example, *(abc).

Pick out the correct option.

Correct Option: C

References automatically dereference without needing an extra character

What is the output of this program?

#include <iostream>
    using namespace std;
    int main()
    {
        int num1, num2;
        int* Res;
        Res = &num1;
        num1 = 150;
        num2 = 100;
        *Res = 150;
        num2 = *Res;
        cout << *Res << " " << num2;
        return 0;
    }

Correct Option: C

In this program, We are making the assignments and invoking the both num1 and num2 values as 150 by dereference operator.

What is the output of this program?

#include <iostream>
    using namespace std;
    int main()
    {
        int num;
        int *ptr;
        num = 12;
        ptr = #
        cout << *ptr;
        return 0;
    }

Correct Option: B

In this program, we are copying the memory location of num into ptr and then printing the value in the address.

What is the output of this program?

#include <iostream>
    using namespace std;
    int main ()
    {
        int Num;
        int *PtrA;
        int **PtrB;
        Num = 1;
        PtrA = &Num;
        PtrB = &PtrA;
        cout << Num << "\n";
        cout << *PtrA << "\n";
        cout << *PtrB << "\n";
        cout << **PtrB << "\n";
        return 0;
    }

Correct Option: C

In this program, We are printing the values and memory address
by using the pointer and dereference operator.

References

References

C++ Programming

Correct Option: D

Correct Option: C

Correct Option: C

Correct Option: B

Correct Option: C