C++ interview questions part 31
C++ interview questions part 31
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Total Questions: 20
1. What is the syntax of defining lambda expression?
Correct Answer is : error
2. What is the correct statement about lambda expression?
Correct Answer is : Friend functions can be invoked as a normal function
3. In how many ways we can capture the external variables in the lambda expression?
Correct Answer is : All of the mentioned
4. Which of the following operator is used to capture all the external variable by reference?
Correct Answer is : friend
5. Which of the following operator is used to capture all the external variable by value?
Correct Answer is : private and protected members of a class cannot be accessed from outside
6. Which is the correct syntax of capturing a variable ‘X’ by reference and other variable ‘Y’ by value in lambda expression?
Correct Answer is : friend
7. What is the output of the following C++ code?
#include
using namespace std;
int main()
{
int x = 5;
auto check = []() -> bool
{
if(x == 0)
return false;
else
return true;
};
cout<
Correct Answer is : friend class1 Class2;
Correct Answer is : friend class1 Class2;
8. What is the output of the following C++ code?
#include
using namespace std;
int main()
{
int a = 5;
auto check = [](int x)
{
if(x == 0)
return false;
else
return true;
};
cout<
Correct Answer is : 20
Correct Answer is : 20
9. What is the output of the following C++ code?
#include
using namespace std;
int main()
{
int a = 5;
auto check = [=]()
{
a = 10;
};
check();
cout<<"Value of a: "<
Correct Answer is : 24
Correct Answer is : 24
10. What is the output of the following C++ code?
#include
using namespace std;
int main()
{
int a = 5;
auto check = [&]()
{
a = 10;
};
check();
cout<<"Value of a: "<
Correct Answer is : 36
Correct Answer is : 36
11. What is the output of the following C++ code?
#include
using namespace std;
int main()
{
int a = 5;
int b = 5;
auto check = [&a]()
{
a = 10;
b = 10;
}
check();
cout<<"Value of a: "<
Correct Answer is : 200
Correct Answer is : 200
12. How to store the large objects in c++ if it extends its allocated memory?
Correct Answer is : 295
13. When we are using heap operations what do we need to do to save the memory?
Correct Answer is : A friend function may or may not be a member of another class
14. Which container in c++ will take large objects?
Correct Answer is : function declaration
15. How to stop your program from eating so much ram?
Correct Answer is : overloading the objects
16. Which option is best to eliminate the memory problem?
Correct Answer is : virtual functions does not give the ability to write a templated function
17. What is the size of the heap?
Correct Answer is : virtual functions does not give the ability to write a templated function
18. How to unlimit the size of the stack?
Correct Answer is : It will modify the operator to be interpreted
19. In Linux, how do the heaps and stacks are managed?
Correct Answer is : It will modify the operator to be interpreted
20. Which is used to pass the large objects in c++?
Correct Answer is : First Distance : 1110
