C++ Object Oriented Programming Exam

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Questions and Answers

How can a friend function be used to overload a binary operator in C++?

A friend function can be used to overload a binary operator in C++ by declaring the function as a friend of the class, and then defining the function to take two objects of the class as arguments, allowing the operator to be used with objects of the class.

What is the difference between call by value and call by reference in function calls?

In call by value, a copy of the argument is passed to the function, whereas in call by reference, a reference to the original argument is passed, allowing the function to modify the original argument.

How can constructors in a derived class be used to initialize objects of the base class?

Constructors in a derived class can use an initialization list to initialize objects of the base class, using the syntax Derived() : Base(initializer) {}.

What is the difference between operator overloading using a member function and a friend function?

When overloading an operator using a member function, the left-hand operand is the object of the class, whereas when using a friend function, the operator can be used with operands in either order. Signup and view all the answers

How can an array of objects be used to store multiple objects of a class?

An array of objects can be declared using the syntax <code>Object arr[-size];</code>, and each element of the array can be accessed using the syntax <code>arr[i]</code>. Signup and view all the answers

What is the main difference between ordinary functions and member functions?

Member functions are part of a class and have access to the class's private and protected members, whereas ordinary functions are standalone functions. Signup and view all the answers

What is the purpose of a friend class in C++?

A friend class is a class that is granted access to the private and protected members of another class. Signup and view all the answers

What is the difference between a constructor and a destructor?

A constructor is a special member function that is used to initialize objects when they are created, whereas a destructor is a special member function that is used to release resources when an object is destroyed. Signup and view all the answers

What is the purpose of inline functions in C++?

Inline functions are used to reduce the overhead of function calls by expanding the function body at the point of call. Signup and view all the answers

What is the purpose of static data members and static member functions in C++?

Static data members are shared by all objects of a class, and static member functions can be used to manipulate static data members. Signup and view all the answers

Study Notes

Object Oriented Programming Using C++ Examination

Part A

Structured programming is a programming paradigm that emphasizes on dividing a program into small, manageable tasks or functions.
In the code a=5; b=++a;, the value of a will be 6 and the value of b will be 6.
Ordinary functions are independent functions that can be called by any part of the program, whereas member functions are part of a class and can access class members.
Memory allocation of class data members is done when an object of the class is created, and member functions are allocated memory when they are called.
A friend class is a class that can access the private and protected members of another class.
The general form of defining a constructor in a derived class is DerivedClass::DerivedClass(parameters) : BaseClass(parameters) {}.
Constructor overloading is when multiple constructors with different parameters are defined in a class.
The syntax for defining a derived class in inheritance is class DerivedClass : access-specifier BaseClass { ... };.
An abstract class is a class that cannot be instantiated and is used as a base class for other classes.
A pure virtual function is a function that must be implemented by any derived class.
A file stream is a class that provides input/output operations on files.
There are two types of file pointers: get pointer and put pointer.

Part B

Advantage of Reference Variable

Reference variables provide an alias for a variable, allowing multiple names for the same memory location.

Inline Function

An inline function is a function that is expanded in-line at compile-time, reducing function call overhead.

Static Data Members and Static Member Function

Static data members are shared by all objects of a class, and static member functions can access static data members.

Destructor

A destructor is a special member function that is called when an object is destroyed, used for memory deallocation.

Overloading Binary Operator Using Friend Function

A program can be written to overload a binary operator using a friend function, allowing operators to be used with objects of a class.

Multi-Level Inheritance

Multi-level inheritance is when a derived class inherits from another derived class.

Constructors in Derived Class

Constructors in a derived class are used to initialize objects of the derived class.

Printing Address of an Object Using This Pointer

The this pointer can be used to print the address of an object.

Unformatted I/O Operation

Unformatted I/O operation is when input/output operations are performed without using formatted input/output functions.

Part C

Call by Reference and Call by Value

Call by reference is when a function call passes a reference to the original variable, while call by value passes a copy of the variable.

Function Overloading

Function overloading is when multiple functions with the same name can be defined with different parameters.

Array of Objects

An array of objects is an array that holds objects of a class.

Difference Between Overloading an Operator Using Member Function and Friend Function

Overloading an operator using a member function is when the operator is defined as a member function of the class, while using a friend function is when the operator is defined as a friend function of the class.

Inheritance and Passing Parameters to Base Class Constructors

Inheritance is when a derived class inherits properties and behavior from a base class, and parameters can be passed to base class constructors using the : operator.

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Description

This quiz assesses your understanding of object-oriented programming concepts using C++. It covers topics such as structured programming, functions, and memory allocation in C++.