C++ Programming Questions and Answers – STL Container Any – 1

This set of C++ Programming Multiple Choice Questions & Answers (MCQs) focuses on “STL Container Any – 1”.

1. What is any in C++?
a) STL container used to store a single value of any type
b) Exception class in C++
c) Fundamental type provided by C++
d) Template data type
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2. In how many different ways any-container can be constructed?
a) 1
b) 2
c) 3
d) 4
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3. What is the correct syntax of constructing any using copy initialization?
a) any variable_name = value;
b) any variable_name(value);
c)

any variable_name;
variable_name = value;

d) any <type>variable_name = value;
View Answer

any variable_name = value;

4. What is the correct syntax of constructing any using parameterized constructor?
a) any variable_name = value;
b) any variable_name(value);
c)

any variable_name;
variable_name = value;

d) any <type>variable_name = value;
View Answer

any variable_name(value);

5. What is the correct syntax of constructing any using assignment operator?
a) any variable_name = value;
b) any variable_name(value);
c)

any variable_name;
variable_name = value;

d) any <type>variable_name = value;
View Answer

any variable_name;
variable_name = value;

6. Which of the following syntax is used to convert any variable to its original type?
a) any_cast<variable_name>();
b) any_cast(variable_name);
c) <original_type>(variable_name);
d) any_cast<original_type>(variable_name);
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any_cast(variable_name);

7. Which header file is required to use any container?
a) <any>
b) <stl>
c) <container-any>
d) <containers>
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8. What will be the output of the following C++ code?

#include<iostream>
#include<any>
using namespace std;
int main()
{
	int a = 5;
	any var = a;
	cout<<var<<endl;
	return 0;
}

a) 5
b) Compile-time error
c) Run-time error
d) Nothing is printed
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9. What will be the output of the following C++ code?

#include<iostream>
#include<any>
#include<string>
using namespace std;
int main()
{
	string s = "Hello World";
	any var(s);
	cout<<any_cast<string>(var)<<endl;
	return 0;
}

a) Run-time error
b) Compile-time error
c) Hello World
d) Nothing is printed
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10. What will be the output of the following C++ code?

#include<iostream>
#include<any>
#include<string>
using namespace std;
int main()
{
	string s = "Hello World";
	any var(s);
	cout<<any_cast<char*>(var)<<endl;
	return 0;
}

a) Hello World
b) Compile-time error
c) Run-time error
d) Nothing is printed
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Sanfoundry Global Education & Learning Series – C++ Programming Language.

To practice all areas of C++ language, here is complete set of 1000+ Multiple Choice Questions and Answers.