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C++ Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to C++ Framework. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Q 1 - Abstract class is __
A - A class must contain all pure virtual functions
B - A class must contain at least one pure virtual function
C - A class may not contain pure virtual function.
D - A class must contain pure virtual function defined outside the class.
Answer : B
Explaination
It is sufficient to have one pure virtual function in the class to make it as an abstract class.
Q 2 - From the below class choose the proper definition of the member function f().
template <class T>
class abc {
void f();
};
A - template <class T> void abc<T>::f() { }
B - template<class T> void abc::f() { }
Answer : A
Explaination
Q 3 - We can have varying number of arguments for the overloaded form of () operator.
Answer : A
Explaination
Q 4 - The pointer which stores always the current active object address is __
Answer : B
Explaination
this is the keyword and acts as a pointer which always holds current active objects.
Q 5 - What is the full form of RTTI.
A - Runtime type identification
B - Runtime template identification
Answer : A
Explaination
Q 6 - A C++ program statements can be commented using
Answer : D
Explaination
Both styles of commenting is available in C++.
Q 7 - What is the output of the following program?
#include<iostream>
using namespace std;
main() {
int x = 5;
if(x==5) {
if(x==5) break;
cout<<"Hello";
}
cout<<Hi;
}
Answer : A
Explaination
compile error, keyword break can appear only within loop/switch statement.
#include<iostream>
using namespace std;
main() {
int x = 5;
if(x==5) {
if(x==5) break;
cout<<"Hello";
}
cout<<Hi;
}
Q 8 - What is the output of the following program?
#include<iostream>
using namespace std;
main() {
float t = 2;
switch(t) {
case 2: cout<<Hi;
default: cout<<"Hello";
}
}
Answer : D
Explaination
Error, switch expression cant be float value
#include<iostream>
using namespace std;
main() {
float t = 2;
switch(t) {
case 2: cout<<Hi;
default: cout<<"Hello";
}
}
Answer : B
Explaination
bool is the reserved keyword and cannot be used an identifier name.
Q 10 - What is the output of the following program?
#include<iostream>
using namespace std;
void main() {
char *s = "C++";
cout<<s<<" ";
s++;
cout<<s<<" ";
}
Answer : B
Explaination
After s++, s points the string ++.
#include<iostream>
using namespace std;
void main() {
char *s = "C++";
cout<<s<<" ";
s++;
cout<<s<<" ";
}