C++ Programming · all questions

Pointers and References in C++
practice.

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Q81

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main()
{
    int *p;
    void *vp;
    if (vp == p)
        cout << "equal";
    return 0;
}

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Q82

What will be the output of the following C++ code?

#include<iostream>
using namespace std;
 
int &fun()
{
    static int x = 10;
    return x;
}
int main()
{
    fun() = 30;
    cout << fun();
    return 0;
}

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Q83

What will be the output of the following C++ code?

#include <iostream>
#include <string>
#include <cstdlib>
 
using namespace std;
 
int main(int argc, char const *argv[])
{
	int a = 5;
	int *p = &a;
	int &q = p;
	cout<<p;
	return 0;
}

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Q84

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int func(void *Ptr);
int main()
{
    char *Str = "abcdefghij";
    func(Str);
    return 0;
}
int func(void *Ptr)
{
    cout << Ptr;
    return 0;
}

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Q85

Which of the following statement(s) is/are correct?

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Q86

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main()
{
    int a = 5, c;
    void *p = &a;
    double b = 3.14;
    p = &b;
    c = a + b;
    cout << c << '\n' << p;
    return 0;
}

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Q87

What are the references in C++?

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Q88

The difference between x and 'x' is?

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Q89

What does the following statement mean?

int (*fp)(char*)

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Q90

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main()
{
    int arr[] = {4, 5, 6, 7};
    int *p = (arr + 1);
    cout << arr;
    return 0;
}

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Q91

Which of the following statement is not true about preprocessor directives?

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Q92

What will be the output of the following C++ code?

#include<iostream>
using namespace std;
 
int &fun()
{
    int x = 10;
    return x;
}
int main()
{
    fun() = 30;
    cout << fun();
    return 0;
}

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Q93

How a reference is different from a pointer?

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Q94

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main()
{
    int arr[] = {4, 5, 6, 7};
    int *p = (arr + 1);
    cout << *p;
    return 0;
}

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Q95

What does a reference provide?

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Q96

Which of the following operator is used while declaring references?

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Q97

The void pointer can point to which type of objects?

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Q98

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main()
{
    int a = 9;
    int & aref = a;
    a++;
    cout << "The value of a is " << aref;
    return 0;
}

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