Unit 3 Computing 009

What is the primary aim of Object-Oriented Programming, and how does it relate to real-world entities?

• To improve the speed of program execution by using real-world entities.

• To model real-world entities and their interactions to solve complex problems.

• To ensure that all code is written in a procedural manner.

• To eliminate the need for data structures in programming.

How would you define a class, and why is it considered the blueprint for objects?

• A class is a data type that stores only primitive data types.

• A class is a blueprint for creating objects, defining their properties and behaviours.

• A class is a function that performs a specific task.

• A class is a variable that holds multiple values.

What is an object in OOP, and how does it differ from a class?

• An object is a function, while a class is a variable.

• An object is an instance of a class, with memory allocated for its properties.

• An object is a blueprint, while a class is an instance.

• An object is a data type, while a class is a function.

What is data abstraction, and how does it simplify the interaction between users and complex systems?

• Data abstraction hides the implementation details and shows only the necessary features.

• Data abstraction increases the complexity of the system by adding more layers.

• Data abstraction is the process of converting data into binary form.

• Data abstraction is the method of storing data in a database.

What is encapsulation, and how does it promote data security?

• Encapsulation is the process of writing data to a file.

• Encapsulation is the technique of wrapping data and methods into a single unit, restricting access to certain components.

• Encapsulation is the method of encrypting data for secure transmission.

• Encapsulation is the process of compressing data to save space.

How does inheritance reduce redundancy in code?

• Inheritance allows for the creation of multiple copies of the same class.

• Inheritance enables a new class to use properties and methods of an existing class, reducing code duplication.

• Inheritance is a method of deleting unused code from a program.

• Inheritance is the process of converting code into machine language.

What is polymorphism in OOP, and how does it enable a single interface to represent different forms?

• Polymorphism is the ability to create multiple classes with the same name.

• Polymorphism allows methods to do different things based on the object it is acting upon.

• Polymorphism is the process of converting one data type to another.

• Polymorphism is the method of storing multiple values in a single variable.

What is dynamic binding, and how does it differ from static binding in terms of execution?

• Dynamic binding occurs at compile time, while static binding occurs at runtime.

• Dynamic binding occurs at runtime, allowing for more flexible method invocation.

• Dynamic binding is the process of linking libraries to a program.

• Dynamic binding is the method of allocating memory for variables.

How do objects in OOP communicate using message passing?

• Objects communicate by directly accessing each other's data.

• Objects communicate by sending messages, which are method calls, to each other.

• Objects communicate by sharing the same memory space.

• Objects communicate by using global variables.

What are the main reasons for using object-oriented programming?

• OOP is used to increase the complexity of code.

• OOP is used to model real-world problems, promote code reuse, and improve maintainability.

• OOP is used to eliminate the need for functions in programming.

• OOP is used to convert all data into binary form.