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Interview Questions on Namespaces in C++ : (6)

Question: 1

Which operator is used to access the namespace?

(A) :?
(B) ::
(C) ->
(D) .

Compiler
Level: Practitioner Category: namespace
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Question: 2

What is the correct syntax to access any variable of Namespace?

(A) namespace::a
(B) namesspace.a
(C) namespace->a
(D) namespace:a

Compiler
Level: Practitioner Category: namespace
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Question: 3

Can we have nested namespaces in C++?

(A) Yes
(B) No

Compiler
Level: Beginner Category: namespace
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Question: 4

What should be the location of "using namespace std;" in c++ code?

(A) Before all #include
(B) After #include<iostream>
(C) In middle of #includes
(D) After all #inludes

Compiler
Level: Beginner Category: namespace
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Question: 5

What is different between these two lines?
 using namespace std;
 using std::cout;

(A) Using the entire namespace, using only single name from namespace
(B) There is no difference
(C) We can't use only cout from std namespace

Compiler
Level: Beginner Category: namespace
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Question: 6

#include<iostream>
#define killer using

killer namespace std;

int main(){
    std::cout<<"CppBuzz.com";
    return 0;
}

(A) Runtime Error
(B) Compilation Erro
(C) Nothing is printed
(D) CppBuzz.com

Compiler
Level: Beginner Category: namespace
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