- C++ Basics
- C++ Home
- C++ Overview
- C++ Environment Setup
- C++ Basic Syntax
- C++ Comments
- C++ Data Types
- C++ Variable Types
- C++ Variable Scope
- C++ Constants/Literals
- C++ Modifier Types
- C++ Storage Classes
- C++ Operators
- C++ Loop Types
- C++ Decision Making
- C++ Functions
- C++ Numbers
- C++ Arrays
- C++ Strings
- C++ Pointers
- C++ References
- C++ Date & Time
- C++ Basic Input/Output
- C++ Data Structures
- C++ Object Oriented
- C++ Classes & Objects
- C++ Inheritance
- C++ Overloading
- C++ Polymorphism
- C++ Abstraction
- C++ Encapsulation
- C++ Interfaces
- C++ Advanced
- C++ Files and Streams
- C++ Exception Handling
- C++ Dynamic Memory
- C++ Namespaces
- C++ Templates
- C++ Preprocessor
- C++ Signal Handling
- C++ Multithreading
- C++ Web Programming
- C++ Useful Resources
- C++ Questions and Answers
- C++ Quick Guide
- C++ Object Oriented
- C++ STL Tutorial
- C++ Standard Library
- C++ Useful Resources
- C++ Discussion
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
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 - What is the output of the following program?
#include<iostream>
using namespace std;
class abc {
public:
static int x;
int i;
abc() {
i = ++x;
}
};
int abc::x;
main() {
abc m, n, p;
cout<<m.x<<" "<<m.i<<endl;
}
Answer : A
Explaination
The static member variable ‘x’ shares common memory among all the objects created for the class.
#include<iostream>
using namespace std;
class abc {
public:
static int x;
int i;
abc() {
i = ++x;
}
};
int abc::x;
main() {
abc m, n, p;
cout<<m.x<<" "<<m.i<<endl;
}
Q 2 - Which data type can be used to hold a wide character in C++?
Answer : C
Explaination
wchar_t is the data type using which we can hold Unicode characters.
Q 3 - Operators sizeof and ?:
Answer : B
Explaination
Both the mentioned operators cannot be overloaded.
Answer : B
Explaination
As it is also a character is occupies 1 byte of memory.
Q 5 - What is the output of the following program?
#include<iostream>
using namespace std;
class Base {
public:
void f() {
cout<<"Base\n";
}
};
class Derived:public Base {
public:
void f() {
cout<<"Derived\n";
};
};
main() {
Derived obj;
obj.Base::f();
}
Answer : A
Explaination
Base object cannot refer to Derived members.
#include<iostream>
using namespace std;
class Base {
public:
void f() {
cout<<"Base\n";
}
};
class Derived:public Base {
public:
void f() {
cout<<"Derived\n";
};
};
main() {
Derived obj;
obj.Base::f();
}
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;
void f() {
static int i;
++i;
cout<<i<<" ";
}
main() {
f();
f();
f();
}
Answer : D
Explaination
1 2 3, A static local variables retains its value between the function calls and the default value is 0.
#include<iostream>
using namespace std;
void f() {
static int i;
++i;
cout<<i<<" ";
}
main() {
f();
f();
f();
}
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;
}
Q 9 - What is the output of the following program?
main() {
}
Answer : A
Explaination
It is valid to have main() function empty, therefore producing no displayable output.
Q 10 - What is the output of the following program?
#include<iostream>
using namespace std;
main() {
class student {
int rno = 10;
} v;
cout<<v.rno;
}
Answer : D
Explaination
Class member variables cannot be initialized.
#include<iostream>
using namespace std;
main() {
class student {
int rno = 10;
} v;
cout<<v.rno;
}