Important Introduction to Programming Short Questions
Chapter: 27
Question 1:
Can constructors be overloaded in C++?
Answer:
Yes, constructors can be overloaded by defining multiple constructors with different parameter lists.
Chapter: 27
Question 2:
What is the difference between a simple constructor and a parameterized constructor?
Answer:
A simple constructor does not take any arguments, while a parameterized constructor takes arguments to initialize the data members of an object.
Chapter: 27
Question 3:
How does a destructor differ from a constructor in C++?
Answer:
A destructor is called when an object is destroyed, and it is used to free resources. Unlike constructors, destructors cannot be overloaded and take no arguments.
Chapter: 27
Question 4:
What is the role of utility functions in a class?
Answer:
Utility functions are private functions that support the main public methods of a class, providing internal operations not accessible from outside the class.
Chapter: 27
Question 5:
What does the term 'instance of a class' mean?
Answer:
An instance of a class, also known as an object, is a specific realization of a class, which occupies space in memory.
Chapter: 27
Question 6:
How is memory allocated for class functions and data members in C++?
Answer:
Only one copy of class functions is stored in memory, shared by all objects of the class, while each object has its own separate memory for data members.
Chapter: 27
Question 7:
What does the term 'default constructor' mean?
Answer:
A default constructor is a constructor that can be called with no arguments. If not provided by the user, C++ provides one automatically.
Chapter: 27
Question 8:
Why is it important to initialize data members of a class?
Answer:
Initializing data members ensures that an object starts in a valid state, reducing the risk of bugs due to uninitialized variables.
Chapter: 27
Question 9:
How do you call a member function of a class object?
Answer:
A member function is called using the dot operator (.) followed by the function name, such as objectName.functionName().
Chapter: 27
Question 10:
What happens when an object of a class is destroyed?
Answer:
When an object is destroyed, its destructor is automatically called, which typically handles cleanup tasks like deallocating memory.