Pointers and References in C++ MCQs with Answers 2027

Q41

How are the constants declared?

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Q42

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 = a;
	cout<<p<<endl;
	cout<<q<<endl;
	return 0;
}

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Q43

Open question

How to declare a wide character in the string literal?

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Q44

Open question

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 = a;
	cout<<*p<<endl;
	cout<<*q<<endl;
	return 0;
}

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Q45

Open question

Pick the correct statement about references.

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Q46

Open question

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

#include <iostream>
using namespace std;
int main ()
{
    int numbers[5];
    int * p;
    p = numbers;  *p = 10;
    p++;  *p = 20;
    p = &numbers[2];  *p = 30;
    p = numbers + 3;  *p = 40;
    p = numbers;  *(p + 4) = 50;
    for (int n = 0; n < 5; n++)
       cout << numbers[n] << ",";
    return 0;
}

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Q47

Open question

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

#include <iostream>
#include <string>
#include <cstdlib>
 
using namespace std;
 
void func(const int &a)
{
	int temp = 10;
	a = temp;
	cout<<a;
}
 
int main(int argc, char const *argv[])
{
	int a = 5;
	func(a);
	return 0;
}

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Q48

Open question

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

#include <iostream>
using namespace std;
int main()
{
    int i;
    char c;
    void *data;
    i = 2;
    c = 'd';
    data = &i;
    cout << "the data points to the integer value" << data;
    data = &c;
    cout << "the data now points to the character" << data;
    return 0;
}

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Q49

Open question

Regarding the following statement which of the statements is true?

const int a = 100;

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Q50

Open question

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

#include <iostream>
using namespace std;
int main()
{
    char *ptr;
    char Str[] = "abcdefg";
    ptr = Str;
    ptr += 5;
    cout << ptr;
    return 0;
}

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Q51

Open question

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 &q = a;
	cout<<&a<<endl;
	cout<<&q<<endl;
	return 0;
}

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Q52

Open question

The pointer can point to any variable that is not declared with which of these?

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Q53

Open question

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

#include <iostream>
using namespace std;
void swap(int &a, int &b);
int main()
{
    int a = 5, b = 10;
    swap(a, b);
    cout << "In main " << a << b;
    return 0;
}
void swap(int &a, int &b)
{
    int temp;
    temp = a;
    a = b;
    b = temp;
    cout << "In swap " << a << b;
}

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Q54

Open question

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

#include <iostream>
using namespace std;
int main()
{
    int a = 5, b = 10, c = 15;
    int *arr[ ] = {&a, &b, &c};
    cout << arr[1];
    return 0;
}

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Q55

Open question

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

#include<iostream>
using namespace std;
 
int main()
{
   int x = 10;
   int& ref = x;
   ref = 20;
   cout << x << endl ;
   x = 30;
   cout << ref << endl;
   return 0;
}

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Q56

Open question

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

#include <iostream>
using namespace std;
int main()
{
    int a[2][4] = {3, 6, 9, 12, 15, 18, 21, 24};
    cout << *(a[1] + 2) << *(*(a + 1) + 2) << 2[1[a]];
    return 0;
}

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Q57

Open question

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

#include <iostream>
using namespace std;
int main()
{
    int i;
    const char *arr[] = {"C", "C++", "Java", "VBA"};
    const char *(*ptr)[4] = &arr;
    cout << ++(*ptr)[2];
    return 0;
}

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Q58

Open question

Pick the correct statement about references in C++.

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Q59

Open question

A void pointer cannot point to which of these?

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Q60

Open question

Identify the correct sentence regarding inequality between reference and pointer.

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Pointers and References in C++practice.

Pointers and References in C++
practice.