C++ interview questions part 53
C++ interview questions part 53
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Total Questions: 20
1. Which function can be used to find the sum of a vector container?
Correct Answer is : In swap 105 In main 105
2. Which header file is required to use accumulate() function?
Correct Answer is : Alternate name for the variable
3. What is any in C++?
Correct Answer is : 10
4. In how many different ways any-container can be constructed?
Correct Answer is : Hello world
5. What is the correct syntax of constructing any using copy initialization?
Correct Answer is : we can not create the array of reference
6. What is the correct syntax of constructing any using parameterized constructor?
Correct Answer is : An alternative name for already existing variables
7. What is the correct syntax of constructing any using assignment operator?
Correct Answer is : Compile-time error
8. Which of the following syntax is used to convert any variable to its original type?
Correct Answer is : Error
9. Which header file is required to use any container?
Correct Answer is : 5
10. What is the output of the following C++ code?
#include
#include
using namespace std;
int main()
{
int a = 5;
any var = a;
cout<
Correct Answer is : Compile-time error
Correct Answer is : Compile-time error
11. What is the output of the following C++ code?
#include
#include
#include
using namespace std;
int main()
{
string s = "Hello World";
any var(s);
cout<(var)<
Correct Answer is : Address of pointer a
Correct Answer is : Address of pointer a
12. What is the output of the following C++ code?
#include
#include
#include
using namespace std;
int main()
{
string s = "Hello World";
any var(s);
cout<(var)<
Correct Answer is : References are an alias for a variable whereas pointer stores the address of a variable
Correct Answer is : References are an alias for a variable whereas pointer stores the address of a variable
13. Which exception is thrown if the typecasting is not done properly?
Correct Answer is : References and variables both have the same address
14. What is the use of emplace() function?
Correct Answer is : Address of a followed by 5 in next line
15. What is the output of the following C++ code?
#include
#include
using namespace std;
int main()
{
float val = 5.5;
any var(val);
cout<(c);
cout<
Correct Answer is : Compile time error
Correct Answer is : Compile time error
16. What is the output of the following C++ code?
#include
#include
using namespace std;
int main()
{
float val = 5.5;
any var(val);
cout<
Correct Answer is : Error
Correct Answer is : Error
17. What is the use of has_value() function in any container?
Correct Answer is : References once assigned cannot be changed to refer another variable
18. What is the output of the following C++ code?
#include
#include
using namespace std;
int main()
{
float val = 5.5;
any var(val);
if(var.has_value())
{
cout<<"Var is not Empty\n";
}
else
{
cout<<"Var is Empty\n";
}
return 0;
}
Correct Answer is : &
19. What is the use of reset() function?
Correct Answer is : Error
20. What is the output of the following C++ code?
#include
#include
using namespace std;
int main()
{
float val = 5.5;
any var(val);
cout<(var)<
Correct Answer is : 343
Correct Answer is : 343
