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C++ Programming :: Namespaces

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Choose the correct option.

Which operator is used to signify the namespace?

Aconditional operator

Bternary operator

Cscope operator

Dnone of the mentioned

Explanation:

Here is no explanation for this answer

Workspace

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Choose the correct option.

Identify the correct statement

ANamespace is used to group class, objects and functions.

BNamespace is used to mark the beginning of the program.

CNamespace is used to seperate the class, objects.

DNone of the above

Explanation:

Namespace allow you to group class, objects and functions. It is used to divide the global scope into the sub-scopes.

Workspace

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Choose the correct option.

What is the use of Namespace?

ATo encapsulate the data

BTo structure a program into logical units.

CBoth a and b

Dnone of the mentioned

Explanation:

The main aim of the namespace is to understand the logical units of the program and to make the program so robust.

Workspace

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Choose the correct option.

What is the general syntax for accessing the namespace variable?

Anamespaceid::operator

Bnamespace,operator

Cnamespace#operator

Dnone of the mentioned

Explanation:

Here is no explanation for this answer

Workspace

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5 / 12

Choose the correct option.

Which keyword is used to access the variable in namespace?

Ausing

Bdynamic

Cconst

Dstatic

Explanation:

Here is no explanation for this answer

Workspace

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What is the output of the below C++ program?
#include <iostream>
using namespace std;
namespace Box1
{
int a = 4;
}
namespace Box2
{
int a = 13;
}

int main ()
{
int a = 16;
Box1::a;
Box2::a;
cout << a;
return 0;
}

A4

B13

C16

DCompilation Error

Explanation:

There is lot of variable a and it is printing the value inside the block because it got the highest priority.

Workspace

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What is the output of the below C++ program?
#include <iostream>
using namespace std;
namespace first
{
int var = 5;
}
namespace second
{
double var = 3.1416;
}
int main ()
{
int a;
a = first::var + second::var;
cout << a;
return 0;
}

A8.31416

B8

C9

DCompilation Error

Explanation:

Two variables from namespace variable and we are adding that.

Workspace

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What is the output of the below C++ Program?
#include <iostream>
using namespace std;
namespace first
{
int x = 5;
int y = 10;
}
namespace second
{
double x = 3.1416;
double y = 2.7183;
}
int main ()
{
using first::x;
using second::y;
bool a, b;
a = x > y;
b = first::y < second::x;
cout << a << b;
return 0;
}

A11

B1

C0

D10

Explanation:

We are inter mixing the variable and comparing it which is bigger and smaller and according to that we are printing the output.

Workspace

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What is the output of the below C++ program?
#include <iostream>
using namespace std
namespace space
{
int x = 10;
}
namespace space
{
int y = 15;
}
int main(int argc, char * argv[])
{
space::x = space::y =5;
cout << space::x << space::y;
}

A1015

B1510

C55

DCompilation Error

Explanation:

Here is no explanation for this answer

Workspace

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10 / 12

What is the output of the below C++ program?
#include <iostream>
using namespace std;
namespace extra
{
int i;
}
void i()
{
using namespace extra;
int i;
i = 9;
cout << i;
}
int main()
{
enum  letter { i, j};
class i { letter j; };
::i();
return 0;
}

A9

B10

C11

DCompilation Error

Explanation:

cope resolution operator without a scope qualifier refers to the global namespace.

Workspace

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