McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Computer Applications (BCA) , Programming Languages .
| 101. |
A private member function can be called by another function that is a member of a class is called |
| A. | Friend function |
| B. | Nesting of member function |
| C. | Inline function |
| D. | Static function |
| Answer» B. Nesting of member function | |
| 102. |
The function that is a bridge between two classes |
| A. | Friend function |
| B. | Nesting of member function |
| C. | Inline function |
| D. | Static function |
| Answer» A. Friend function | |
| 103. |
The break statement causes an exit |
| A. | from the innermost loop only. |
| B. | only from the innermost switch. |
| C. | from all loops & switches. |
| D. | from the innermost loop or switch. |
| Answer» C. from all loops & switches. | |
| 104. |
The arrays of variable that are of the type class |
| A. | Array of object |
| B. | pointer |
| C. | Object |
| D. | Structure |
| Answer» A. Array of object | |
| 105. |
Which of the following is not a type of constructor? |
| A. | Copy constructor |
| B. | Friend constructor |
| C. | Default constructor |
| D. | Parameterized construct |
| Answer» B. Friend constructor | |
| 106. |
Which of the following statements is incorrect? |
| A. | Friend keyword can be used in the class to allow access to another class. |
| B. | Friend keyword can be used for a function in the public section of a class. |
| C. | Friend keyword can be used for a function in the private section of a class. |
| D. | Friend keyword can be used on main(). |
| Answer» D. Friend keyword can be used on main(). | |
| 107. |
Which of the following statement is correct regarding destructor of base class? |
| A. | Destructor of base class should always be static. |
| B. | Destructor of base class should always be virtual. |
| C. | Destructor of base class should not be virtual. |
| D. | Destructor of base class should always be private. |
| Answer» B. Destructor of base class should always be virtual. | |
| 108. |
How can we make a class abstract? |
| A. | By making all member functions constant. |
| B. | By making at least one member function as pure virtual function. |
| C. | By declaring it abstract using the static keyword. |
| D. | By declaring it abstract using the virtual keyword. |
| Answer» B. By making at least one member function as pure virtual function. | |
| 109. |
Which of the following statements is correct when a class is inherited publicly? |
| A. | Public members of the base class become protected members of derived class. |
| B. | Public members of the base class become private members of derived class. |
| C. | Private members of the base class become protected members of derived class. |
| D. | Public members of the base class become public members of derived class. |
| Answer» D. Public members of the base class become public members of derived class. | |
| 110. |
Which of the following access specifies is used in a class definition by default? |
| A. | Protected |
| B. | Public |
| C. | Private |
| D. | Friend |
| Answer» C. Private | |
| 111. |
Which of the following statement is correct with respect to the use of friend keyword inside a class? |
| A. | A private data member can be declared as a friend. |
| B. | A class may be declared as a friend. |
| C. | An object may be declared as a friend. |
| D. | We can use friend keyword as a class name. |
| Answer» B. A class may be declared as a friend. | |
| 112. |
Which of the following keywords is used to control access to a class member? |
| A. | Default |
| B. | Break |
| C. | Protected |
| D. | Asm |
| Answer» C. Protected | |
| 113. |
Which of the following type of data member can be shared by all instances of its class? |
| A. | Public |
| B. | Inherited |
| C. | Static |
| D. | Friend |
| Answer» C. Static | |
| 114. |
Constructor is executed when _____. |
| A. | an object is created |
| B. | an object is used |
| C. | a class is declared |
| D. | an object goes out of scope. |
| Answer» A. an object is created | |
| 115. |
Which of the following also known as an instance of a class? |
| A. | Friend Functions |
| B. | Object |
| C. | Member Functions |
| D. | Member Variables |
| Answer» B. Object | |
| 116. |
How many objects can be created from an abstract class? |
| A. | Zero |
| B. | One |
| C. | Two |
| D. | As many as we want |
| Answer» A. Zero | |
| 117. |
Which of the following statements is correct? |
| A. | Data items in a class must be private. |
| B. | Both data and functions can be either private or public. |
| C. | Member functions of a class must be private. |
| D. | Constructor of a class cannot be private. |
| Answer» B. Both data and functions can be either private or public. | |
| 118. |
Which of the following can be overloaded? |
| A. | Object |
| B. | Functions |
| C. | Operators |
| D. | Both B and C |
| Answer» D. Both B and C | |
| 119. |
Which of the following is the only technical difference between structures and classes in C++? |
| A. | Member function and data are by default protected in structures but private in classes. |
| B. | Member function and data are by default private in structures but public in classes. |
| C. | Member function and data are by default public in structures but private in classes. |
| D. | Member function and data are by default public in structures but protected in classes. |
| Answer» C. Member function and data are by default public in structures but private in classes. | |
| 120. |
Which of the following statements are correct for a static member function? 1. It can access only other static members of its class. 2. It can be called using the class name, instead of objects. |
| A. | Only 1 is correct. |
| B. | Only 2 is correct. |
| C. | Both 1 and 2 are correct. |
| D. | Both 1 and 2 are incorrect. |
| Answer» C. Both 1 and 2 are correct. | |
| 121. |
Which of the following means "The use of an object of one class in definition of another class"? |
| A. | Encapsulation |
| B. | Inheritance |
| C. | Composition |
| D. | Abstraction |
| Answer» C. Composition | |
| 122. |
Which of the following statements is correct when a class is inherited publicly? |
| A. | Public members of the base class become protected members of derived class. |
| B. | Public members of the base class become private members of derived class. |
| C. | Private members of the base class become protected members of derived class. |
| D. | Public members of the base class become public members of derived class |
| Answer» D. Public members of the base class become public members of derived class | |
| 123. |
Which of the following statements is correct about the constructors and destructors? |
| A. | Destructors can take arguments but constructors cannot. |
| B. | Constructors can take arguments but destructors cannot. |
| C. | Destructors can be overloaded but constructors cannot be overloaded. |
| D. | Constructors and destructors can both return a value. |
| Answer» B. Constructors can take arguments but destructors cannot. | |
| 124. |
Which of the following statement is correct? |
| A. | C++ enables to define functions that take constants as an argument. |
| B. | We cannot change the argument of the function that that are declared as constant. |
| C. | Both A and B. |
| D. | We cannot use the constant while defining the function. |
| Answer» C. Both A and B. | |
| 125. |
Which of the following statement is correct? |
| A. | Two functions having same number of argument, order and type of argument can be overloaded if both functions do not have any default argument. |
| B. | Overloaded function must have default arguments. |
| C. | Overloaded function must have default arguments starting from the left of argument list. |
| D. | A function can be overloaded more than once. |
| Answer» D. A function can be overloaded more than once. | |
| 126. |
Which of the following statement will be correct if the function has three arguments passed to it? |
| A. | The trailing argument will be the default argument. |
| B. | The first argument will be the default argument. |
| C. | The middle argument will be the default argument. |
| D. | All the argument will be the default argument. |
| Answer» A. The trailing argument will be the default argument. | |
| 127. |
Which of the following statement is incorrect? |
| A. | Default arguments can be provided for pointers to functions. |
| B. | A function can have all its arguments as default. |
| C. | Default argument cannot be provided for pointers to functions. |
| D. | A default argument cannot be redefined in later declaration. |
| Answer» C. Default argument cannot be provided for pointers to functions. | |
| 128. |
Which of the following statement is correct? |
| A. | Constructors can have default parameters. |
| B. | Constructors cannot have default parameters. |
| C. | Constructors cannot have more than one default parameter. |
| D. | Constructors can have at most five default parameters. |
| Answer» A. Constructors can have default parameters. | |
| 129. |
Which of the following function / type of function cannot be overloaded? |
| A. | Member function |
| B. | Static function |
| C. | Virtual function |
| D. | Both B and C |
| Answer» C. Virtual function | |
| 130. |
Which of the following statement is incorrect? |
| A. | The default value for an argument can be a global constant. |
| B. | The default arguments are given in the function prototype. |
| C. | Compiler uses the prototype information to build a call, not the function definition. |
| D. | The default arguments are given in the function prototype and should be repeated in the function definition. |
| Answer» D. The default arguments are given in the function prototype and should be repeated in the function definition. | |
| 131. |
Where the default value of parameter have to be specified? |
| A. | Function call |
| B. | Function definition |
| C. | Function prototype |
| D. | Both B or C |
| Answer» C. Function prototype | |
| 132. |
Which of the following statement is correct? |
| A. | The default value for an argument cannot be function call. |
| B. | C++ allows the redefinition of a default parameter. |
| C. | Both A and B. |
| D. | C++ does not allow the redefinition of a default parameter. |
| Answer» D. C++ does not allow the redefinition of a default parameter. | |
| 133. |
Which of the following statement is correct? |
| A. | Only one parameter of a function can be a default parameter. |
| B. | Minimum one parameter of a function must be a default parameter. |
| C. | All the parameters of a function can be default parameters. |
| D. | No parameter of a function can be default. |
| Answer» C. All the parameters of a function can be default parameters. | |
| 134. |
Which of the following function / types of function cannot have default parameters? |
| A. | Member function of class |
| B. | main() |
| C. | Member function of structure |
| D. | Both B and C |
| Answer» B. main() | |
| 135. |
A constructor that accepts __________ parameters is called the default constructor. |
| A. | one |
| B. | two |
| C. | no |
| D. | three |
| Answer» C. no | |
| 136. |
What happens when a class with parameterized constructors and having no default constructor is used in a program and we create an object that needs a zero‐argument constructor? |
| A. | Compile‐time error. |
| B. | Preprocessing error. |
| C. | Runtime error. |
| D. | Runtime exception. |
| Answer» A. Compile‐time error. | |
| 137. |
Destructor has the same name as the constructor and it is preceded by ______ . |
| A. | ! |
| B. | ? |
| C. | ~ |
| D. | $ |
| Answer» C. ~ | |
| 138. |
For automatic objects, constructors and destructors are called each time the objects |
| A. | enter and leave scope |
| B. | inherit parent class |
| C. | are constructed |
| D. | are destroyed |
| Answer» A. enter and leave scope | |
| 139. |
Which constructor function is designed to copy objects of the same class type? |
| A. | Create constructor |
| B. | Object constructor |
| C. | Dynamic constructor |
| D. | Copy constructor |
| Answer» D. Copy constructor | |
| 140. |
Which of the following statement is correct? |
| A. | Constructor has the same name as that of the class. |
| B. | Destructor has the same name as that of the class with a tilde symbol at the beginning. |
| C. | Both A and B. |
| D. | Destructor has the same name as the first member function of the class. |
| Answer» C. Both A and B. | |
| 141. |
When are the Global objects destroyed? |
| A. | When the control comes out of the block in which they are being used. |
| B. | When the program terminates. |
| C. | When the control comes out of the function in which they are being used. |
| D. | As soon as local objects die. |
| Answer» B. When the program terminates. | |
| 142. |
Copy constructor must receive its arguments by __________ . |
| A. | either pass‐by‐value or pass‐by‐reference |
| B. | only pass‐by‐value |
| C. | only pass‐by‐reference |
| D. | only pass by address |
| Answer» C. only pass‐by‐reference | |
| 143. |
A function with the same name as the class, but preceded with a tilde character (~) is called __________ of that class. |
| A. | constructor |
| B. | destructor |
| C. | function |
| D. | object |
| Answer» B. destructor | |
| 144. |
Which of the following gets called when an object goes out of scope? |
| A. | constructor |
| B. | destructor |
| C. | main |
| D. | virtual function |
| Answer» B. destructor | |
| 145. |
_________ used to make a copy of one class object from another class object of the same class type. |
| A. | constructor |
| B. | copy constructor |
| C. | destructor |
| D. | default constructor |
| Answer» B. copy constructor | |
| 146. |
Constructors __________ to allow different approaches of object construction. |
| A. | cannot overloaded |
| B. | can be overloaded |
| C. | can be called |
| D. | can be nested |
| Answer» B. can be overloaded | |
| 147. |
Which of the following cannot be declared as virtual? |
| A. | Constructor |
| B. | Destructor |
| C. | Data Members |
| D. | Both A and C |
| Answer» A. Constructor | |
| 148. |
If the copy constructor receives its arguments by value, the copy constructor would |
| A. | call one‐argument constructor of the class |
| B. | work without any problem |
| C. | call itself recursively |
| D. | call zero‐argument constructor |
| Answer» C. call itself recursively | |
| 149. |
Which of the following are NOT provided by the compiler by default? |
| A. | Zero‐argument Constructor |
| B. | Destructor |
| C. | Copy Constructor |
| D. | Copy Destructor |
| Answer» D. Copy Destructor | |
| 150. |
It is a __________ error to pass arguments to a destructor. |
| A. | logical |
| B. | virtual |
| C. | syntax |
| D. | linker |
| Answer» C. syntax | |
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