Computer Science Terms Explained
What is the difference between a default constructor and a conversion constructor?
Which feature in object-oriented programming languages allows a class to inherit from more than one base class?
What is a singleton class and how is it used?
Define what a stream is and provide an example of its use.
Explain what a view is in the context of user interfaces.
What is an object in programming?
Answers:
A default constructor is a special type of constructor that is automatically called when an object is created without any arguments. It initializes the object's member variables to their default values. A conversion constructor is a constructor that takes a single argument of a different type and is used to convert objects from one type to another. Multiple inheritance is a feature in object-oriented programming languages that allows a class to inherit from more than one base class. A singleton class is a class that allows only one instance of itself to be created. A stream is a sequence of data that can be read from or written to. A view is a visual representation of data. An object is an instance of a class.
Explanation of Computer Science Terms
Default Constructor
A default constructor is a special type of constructor that is automatically called when an object is created without any arguments. It initializes the object's member variables to their default values. For example, if you have a class called Person with member variables name and age, the default constructor would set the name to an empty string and the age to 0.
Conversion Constructor
A conversion constructor is a constructor that takes a single argument of a different type and is used to convert objects from one type to another. For example, if you have a class called Distance that represents a distance in meters, you could define a conversion constructor that takes a single argument of type int to convert a distance in centimeters to meters.
Multiple Inheritance
Multiple inheritance is a feature in object-oriented programming languages that allows a class to inherit from more than one base class. It allows a class to inherit attributes and behaviors from multiple parent classes. For example, if you have a class called Student that inherits from both Person and Employee classes, the Student class would have access to the attributes and behaviors of both parent classes.
Singleton Class
A singleton class is a class that allows only one instance of itself to be created. It is often used to provide a global point of access to a particular object. For example, a Logger class that logs messages to a file could be implemented as a singleton class to ensure that only one instance of the Logger class is created.
Stream
In computer programming, a stream is a sequence of data that can be read from or written to. It is used to handle input and output operations. For example, you can use a stream to read data from a file or write data to a network socket.
View
In the context of user interfaces, a view is a visual representation of data. It is used to display information to the user and allow them to interact with it. For example, a web page can be considered a view that displays data to the user and allows them to click on links or submit forms.
Object
An object is an instance of a class. It represents a specific entity or concept in a program and has its own set of attributes and behaviors. For example, if you have a class called Car, an object of the Car class would represent a specific car with its own color, model, and other attributes.