C++ interview questions part 43
C++ interview questions part 43
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. What is the output of the following C++ code?
#include
#include
#include
using namespace std;
int main(int argc, char const *argv[])
{
int a = 5;
int *p = &a;
int &q = p;
cout<
Correct Answer is : Namespace is used to group class, objects and functions
Correct Answer is : Namespace is used to group class, objects and functions
2. What is the output of the following C++ code?
#include
#include
#include
using namespace std;
int main(int argc, char const *argv[])
{
int a = 5;
int *p = &a;
int *(&q) = p;
cout<
Correct Answer is : To structure a program into logical units
Correct Answer is : To structure a program into logical units
3. What is the difference between references and pointers?
Correct Answer is : namespace::operator
4. Pick the correct statement about references in C++.
Correct Answer is : 8
5. What is the output of the following C++ code?
#include
#include
#include
using namespace std;
int main(int argc, char const *argv[])
{
int a = 5;
int *p = &a;
int &q = a;
cout<
Correct Answer is : 10
Correct Answer is : 10
6. What is the output of the following C++ code?
#include
#include
#include
using namespace std;
int main(int argc, char const *argv[])
{
int a = 5;
int *p = &a;
int &q = a;
cout<<*p<
Correct Answer is : 16
Correct Answer is : 16
7. What is the output of the following C++ code?
#include
#include
#include
using namespace std;
int main(int argc, char const *argv[])
{
int a = 5;
int &q = a;
cout<<&a<
Correct Answer is : 55
Correct Answer is : 55
8. What is the output of the following C++ code?
#include
#include
#include
using namespace std;
int main(int argc, char const *argv[])
{
int &q = NULL;
cout<
Correct Answer is : 9
Correct Answer is : 9
9. Pick the correct statement about references.
Correct Answer is : using
10. Which of the following operator is used while declaring references?
Correct Answer is : Namespace has access specifiers like private or public
11. What is the output of the following C++ code?
#include
#include
#include
using namespace std;
void func(const int &a){
int temp = 10;
a = temp;
cout<
Correct Answer is : ::
Correct Answer is : ::
12. Which of the following is incorrect?
Correct Answer is : Error
13. Which of the following function must use reference.
Correct Answer is : 5
14. What is the output of the following C++ code?
#include
using namespace std;
int &fun()
{
static int x = 10;
return x;
}
int main()
{
fun() = 30;
cout << fun();
return 0;
}
Correct Answer is : 20
15. What is the output of the following C++ code?
#include
using namespace std;
int &fun()
{
int x = 10;
return x;
}
int main()
{
fun() = 30;
cout << fun();
return 0;
}
#include
using namespace std;
int &fun()
{
static int x = 10;
return x;
}
int main()
{
fun() = 30;
cout << fun();
return 0;
}
Correct Answer is : 10
16. What is the output of the following C++ code?
#include
using namespace std;
int main()
{
int x = 10;
int& ref = x;
ref = 20;
cout << x << endl ;
x = 30;
cout << ref << endl;
return 0;
}
Correct Answer is : namespace name{}
17. How a reference is different from a pointer?
Correct Answer is : cout<
18. Which of the following statement(s) is/are correct?
Correct Answer is : 9999999999
19. What kind of error can arise when there is a problem with memory?
Correct Answer is : Declare both the function inside different namespaces
20. What is meant by garbage collection?
Correct Answer is : 25
