C++ Programming Multiple Choice Question - Namespaces

This section focuses on the "Namespace" in C++ programming langauge. These Multiple Choice Questions (MCQ) should be practiced to improve the C++ programming skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

1. Which operator is used to signify the namespace in c++?

A. conditional operator
B. ternary operator
C. scope operator
D. None of the mentioned

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2. Identify the incorrect statement?

A. Namespace is used to mark the beginning of the program
B. Namespace is used to mark the beginning & end of the program
C. A namespace is used to separate the class, objects
D. All of the above

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3. What is the use of Namespace?

A. To encapsulate the data
B. Encapsulate the data & structure a program into logical units
C. It is used to mark the beginning of the program
D. None of the above

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4. What is the general syntax for accessing the namespace variable?

A. namespace::operator
B. namespace,operator
C. namespace#operator
D. namespace$operator

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5. The use of Namespace is to structure a program into logical units?

A. TRUE
B. FALSE
C. May Be
D. Can't Say

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6. Which of the following is correct option?

#include<iostream>
using namespace std;
namespace lfc1
{
    int var = 30;
}
namespace lfc2
{
    double var = 13.5478;
}
int main ()
{
    int a;
    a = lfc1::var + lfc2::var;
    cout << a;
        return 0;
 }

A. 43.5478
B. 43
C. 44
D. 30

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7. Which of the following is correct option?

    #include<iostream>
    using namespace std;
    namespace lfc1
    {
        double var =30.1234;
    }
    namespace lfc2
    {
        double var = 13.5478;
    }
    int main ()
    {
        double a;
        a = lfc1::var - lfc2::var;
        cout << a;
        return 0;
   }

A. 16.5756
B. 17
C. 15
D. 16.57

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8. Which of the following is correct option?

    #include<iostream>
    using namespace std;
    namespace lfc1
    {
        int x = 10;
    }
    namespace lfc2
    {
        int x = 20;
    }
    int main ()
    {
        int x = 30;
        lfc1::x;
        lfc2::x;
        cout << x;
        return 0;
    }

A. 30
B. 20
C. 10
D. Compile Error

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9. Which of the following is correct option?

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

A. 30
B. 20
C. 10
D. Compile Error

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10. Which keyword is used to access the variable in the namespace?

A. using
B. dynamic
C. const
D. static

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