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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.
Answer : B
Explaination
The purpose of the constructor cannot be overridden in the derived class hence constructor cannot be a virtual.
Q 2 - The operator used to access member function of a structure using its object.
Answer : A
Explaination
Just the way we use dot (.) operator to access members of the class, in similar it is used to access the members of the structure too.
Q 3 - Which is the storage specifier used to modify the member variable even though the class object is a constant object?
Answer : D
Explaination
mutable is storage specifier introduced in C++ which is not available in C. A class member declared with mutable is modifiable though the object is constant.
Q 4 - How many number of arguments can a destructor of a class receives?
Answer : A
Explaination
The destructor receives no arguments and is only form to be provided. Hence destructor cannot be overloaded.
Q 5 - The copy constructor is executed on
A - Assigned one object to another object at its creation
B - When objects are sent to function using call by value mechanism
Answer : D
Explaination
Options (a), (b) & (c) are applicable.
Q 6 - A C++ program statements can be commented using
Answer : D
Explaination
Both styles of commenting is available in C++.
Q 7 - i) Exception handling technically provides multi branching.
ii) Exception handling can be mimicked using goto construct.
Answer : A
Explaination
goto just does the unconditional branching.
Q 8 - What is the output of the following program?
#include<iostream>
using namespace std;
main() {
union abc {
int x;
char ch;
} var;
var.ch = 'A';
cout<<var.x;
}
Answer : B
Explaination
65, as the union variables share common memory for all its elements, x gets A whose ASCII value is 65 and is printed.
#include<iostream>
using namespace std;
main() {
union abc {
int x;
char ch;
} var;
var.ch = 'A';
cout<<var.x;
}
Answer : B
Explaination
g++ is GNU C++ compiler for linux. Borland and vc++ (Microsoft visual c++) for windows.
Q 10 - What is the output of the following program?
#include<iostream>
#include<string.h>
using namespace std;
main() {
char s[] = "Hello\0Hi";
cout<<strlen(s)<<" "<<sizeof(s);
}
Answer : A
Explaination
Length of the string is count of character upto \0. sizeof reports the size of the array.
#include<iostream>
#include<string.h>
using namespace std;
main() {
char s[] = "Hello\0Hi";
cout<<strlen(s)<<" "<<sizeof(s);
}