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Q. Which one of the following is correct, when a class grants friend status to another class?

(A) The member functions of the class generating friendship can access the members of the friend class.
(B) All member functions of the class granted friendship have unrestricted access to the members of the class granting the friendship.
(C) Class friendship is reciprocal to each other.
(D) There is no such concept.

A

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Q. In C++, const qualifier can be applied to
1) Member functions of a class
2) Function arguments
3) To a class data member which is declared as static
4) Reference variables

(A) Only 1, 2 and 3
(B) Only 1, 2 and 4
(C) Only 1, 3 and 4
(D) 1, 2, 3 and 4

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Q. Which of the following is true about new when compared with malloc:
1) new is an operator, malloc is a function
2) new calls constructor, malloc doesn’t
3) new returns appropriate pointer, malloc returns void * and pointer needs to typecast to appropriate type.

(A) 1 and 2
(B) 2 and 3
(C) 1 and 3
(D) 1, 2 and 3

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Q. Predict the output?

Code:

#include <iostream>
using namespace std;
class Test
{
int x;
Test()
{
x = 5;
} };
int main()
{
Test *t = new Test;
cout << t->x;
}

(A) 0
(B) 5
(C) Garbage Value
(D) Compiler Error

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Q. When the inheritance is private, the private methods in base class are__________ in the derived class (in C++).

(A) public
(B) protected
(C) accessible
(D) inaccessible

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Q. Which of the following is true about pure virtual functions?
1) Their implementation is not provided in a class where they are declared.
2) If a class has a pure virtual function, then the class becomes abstract
class and an instance of this class cannot be created.

(A) Only 1
(B) Only 2
(C) Both 1 and 2
(D) Neither 1 nor 2

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Q. What is the size of wchar_t in C++?

(A) 2
(B) 4
(C) 2 or 4
(D) Based on the number of bits in the system

A

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Q. Which of the followings is/are automatically added to every class, if we do not write our own?

(A) A constructor without any parameter
(B) Copy Constructor
(C) Assignment Operator
(D) All of the above

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Q. When a copy constructor may be called?

(A) When an object of the class is returned by value.
(B) When an object of the class is passed (to a function) by value as an argument.
(C) When an object is constructed based on another object of the same class
(D) All of the above

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Q. Constructors have _____ return type.

(A) no
(B) int
(C) char
(D) void

C++ MCQs with answers Page - 83

Q. Which one of the following is correct, when a class grants friend status to another class?

Q. In C++, const qualifier can be applied to
1) Member functions of a class
2) Function arguments
3) To a class data member which is declared as static
4) Reference variables

Q. Which of the following is true about new when compared with malloc:
1) new is an operator, malloc is a function
2) new calls constructor, malloc doesn’t
3) new returns appropriate pointer, malloc returns void * and pointer needs to typecast to appropriate type.

Q. Predict the output?

Q. When the inheritance is private, the private methods in base class are__________ in the derived class (in C++).

Q. Which of the following is true about pure virtual functions?
1) Their implementation is not provided in a class where they are declared.
2) If a class has a pure virtual function, then the class becomes abstract
class and an instance of this class cannot be created.

Q. What is the size of wchar_t in C++?

Q. Which of the followings is/are automatically added to every class, if we do not write our own?

Q. When a copy constructor may be called?

Q. Constructors have _____ return type.

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C++ MCQs with answers Page - 83

Q. Which one of the following is correct, when a class grants friend status to another class?

Q. In C++, const qualifier can be applied to 1) Member functions of a class 2) Function arguments 3) To a class data member which is declared as static 4) Reference variables

Q. Which of the following is true about new when compared with malloc: 1) new is an operator, malloc is a function 2) new calls constructor, malloc doesn’t 3) new returns appropriate pointer, malloc returns void * and pointer needs to typecast to appropriate type.

Q. Predict the output?

Q. When the inheritance is private, the private methods in base class are__________ in the derived class (in C++).

Q. Which of the following is true about pure virtual functions? 1) Their implementation is not provided in a class where they are declared. 2) If a class has a pure virtual function, then the class becomes abstract class and an instance of this class cannot be created.

Q. What is the size of wchar_t in C++?

Q. Which of the followings is/are automatically added to every class, if we do not write our own?

Q. When a copy constructor may be called?

Q. Constructors have _____ return type.

Add MCQ in this Category

Browse Categories

Q. In C++, const qualifier can be applied to
1) Member functions of a class
2) Function arguments
3) To a class data member which is declared as static
4) Reference variables

Q. Which of the following is true about new when compared with malloc:
1) new is an operator, malloc is a function
2) new calls constructor, malloc doesn’t
3) new returns appropriate pointer, malloc returns void * and pointer needs to typecast to appropriate type.

Q. Which of the following is true about pure virtual functions?
1) Their implementation is not provided in a class where they are declared.
2) If a class has a pure virtual function, then the class becomes abstract
class and an instance of this class cannot be created.