Important Introduction to Programming Short Questions
Chapter: 33
Question 1:
How do you define a conversion operator in a class?
Answer:
A conversion operator is defined as a member function that converts an object of one type to another type. It uses the syntax operator Type().
Chapter: 33
Question 2:
What does returning *this from an assignment operator accomplish?
Answer:
Returning *this from an assignment operator allows for chaining of assignment operations by returning the calling object itself.
Chapter: 33
Question 3:
How is implicit type conversion handled in C++?
Answer:
Implicit type conversion is handled automatically by the compiler based on context, such as during assignments or arithmetic operations between different types.
Chapter: 33
Question 4:
What is the difference between implicit and explicit type conversions?
Answer:
Implicit conversions are automatically handled by the compiler, while explicit conversions require the programmer to specify the type using a cast.
Chapter: 33
Question 5:
How can a class define its own conversion from an integer to an object?
Answer:
By providing a constructor or conversion function that takes an integer and converts it to the class type.
Chapter: 33
Question 6:
Why might you use a Fraction class instead of floating-point numbers?
Answer:
To avoid precision issues inherent in floating-point arithmetic by representing values exactly as fractions with numerators and denominators.
Chapter: 33
Question 7:
How does operator overloading enhance the use of user-defined types?
Answer:
It allows user-defined types to interact with operators (like +, =) in a manner consistent with built-in types, improving readability and usability.
Chapter: 34
Question 8:
What is an array of objects in C++?
Answer:
An array of objects in C++ is a collection of instances of a class, where each element of the array is an object of that class. For example, Date myDates[10]; creates an array of 10 Date objects.
Chapter: 34
Question 9:
How do you declare an array of user-defined data types?
Answer:
The declaration of arrays of user-defined data types is similar to arrays of primitive data types. For example, Date myDates[10]; declares an array of 10 Date objects.
Chapter: 34
Question 10:
What constructor is called when you create an array of Date objects without explicit initialization?
Answer:
When creating an array of Date objects without explicit initialization, the default (parameterless) constructor of the Date class is called for each element.