What is similar to the interface in c++

1.	What is similar to the interface in c++
A.	pure abstract class
B.	instance of a class
C.	methods
D.	All of above
E.	None of these
Answer» B. instance of a class

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What is the output of this program? <pre class="prettyprint lang-c">#include <iostream> using namespace std; namespace One { int num = 12; } namespace Two { double num = 10.027; } int main () { int n; n = One::num + Two::num; cout << n; return 0; } </iostream></pre>
What is the output of this program? <pre class="prettyprint lang-c">#include <iostream> using namespace std; namespace calculation { int p; } void p() { using namespace calculation; int p; p = 15; cout << p; } int main() { enum letter { K, L}; class K { letter L; }; ::p(); return 0; } </iostream></pre>
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What is the output of this program? <pre class="prettyprint lang-c">#include <iostream> using namespace std; namespace first { int num = 5; } namespace second { int num = 11; } int main () { int num = 27; first::num; second::num; cout << num; return 0; } </iostream></pre>
What is the output of this program? <pre class="prettyprint lang-c">#include <iostream> using namespace std; namespace One { int K = 15; int L = 11; } namespace Two { double K = 4.016; double L = 7.6001; } int main () { using One::K; using Two::L; bool p, q; p = K > L; q = One::K < Two::L; cout < } </iostream></pre>
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What is similar to the interface in c++

What is similar to the interface in c++

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