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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.

Questions and Answers

Answer : D

Explaination

C++ supports all the forms of inheritance.

Q 2 - Which of the following is not the keyword in C++?

A - volatile

B - friend

C - extends

D - this

Answer : C

Explaination

All the rest are valid keywords of C++.

Q 3 - In the following program f() is overloaded.

void f(int x) {

}

int f(signed x) { 
   return 1;
}

main() {

}

A - True

B - False

Answer : B

Explaination

No, as both the functions arguments is same and compiler ignores return type to consider overloading though different in return type.

Q 4 - Choose the Object oriented programming language from below.

A - C++

B - Small talk

C - Simula

D - All the above.

Answer : D

Explaination

Q 5 - Objects created using new operator are stored in __ memory.

A - Cache

B - Heap

C - Stack

D - None of the above.

Answer : B

Explaination

new operator allocates memory dynamically know as Heap/free memory.

Q 6 - A C++ program statements can be commented using

A - Single line comment

B - Multi line comment

C - Either (a) or (b)

D - Both (a) and (b).

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() {
   short unsigned int i = 0; 
   
   cout<<i--;
}

A - 0

B - Compile error

C - 65535

D - 32767

Answer : A

Explaination

0, with post decrement operator value of the variable will be considered as the expressions value and later gets decremented

#include<iostream>

using namespace std;
main() {
   short unsigned int i = 0; 
   
   cout<<i--;
}

Q 8 - What is the size of the following union definition?

#include<iostream>

using namespace std;
main() {
   union abc { 
      char a, b, c, d, e, f, g, h; 
      
      int i;
   };
   cout<<sizeof(abc);
}

A - 1

B - 2

C - 4

D - 8

Answer : C

Explaination

union size is biggest element size of it. All the elements of the union share common memory.

#include<iostream>

using namespace std;
main() {
   union abc { 
      char a, b, c, d, e, f, g, h; 
      
      int i;
   };
   cout<<sizeof(abc);
}

Q 9 - Special symbol permitted with in the identifier name.

A - $

B - @

C - _

D - .

Answer : C

Explaination

The only permitted special symbol is under score (_) in the identifier.

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<<" ";
}

A - C++ C++

B - C++ ++

C - ++ ++

D - Compile error

Answer : D

Explaination

s refers to a constant address and cannot be incremented.

#include<iostream>

using namespace std;
void main() {
   char s[] = "C++";
   
	cout<<s<<" ";
	s++;
	cout<<s<<" ";
}
cpp_questions_answers.htm
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