oop midterm

1. How do you instantiate an object in Python?

• 1. obj = create Object()

• 1. obj = Object()

• 1. obj = Object

• obj = new Object()

Identify whether the following statements about abstract base classes are True or False:(choose only true)

• 1. The metaclass keyword is used to define abstract base classes.

• 1. A class must implement all methods of an abstract base class.

• 2. Abstract base classes define a set of methods and properties.

• 2. ABCs in Python are primarily created using the abc module.

• 2. Abstract base classes always require subclassing to be useful.

What is the default superclass for all Python classes?

• base

• super

• object

• main

Match the exceptions with their corresponding descriptions: index error

• Raised when an index is out of range for a sequence (e.g., list, tuple).

• Raised for an operation or function that is applied to an inappropriate object type.

• Raised when a function receives an argument of the correct type but an inappropriate value.

 Match the exceptions with their corresponding descriptions: type error

• Raised when a function receives an argument of the correct type but an inappropriate value.

• Raised for an operation or function that is applied to an inappropriate object type.

• Raised when an index is out of range for a sequence (e.g., list, tuple).

 Match the exceptions with their corresponding descriptions: value error

• Raised when an index is out of range for a sequence (e.g., list, tuple).

• Raised for an operation or function that is applied to an inappropriate object type.

• Raised when a function receives an argument of the correct type but an inappropriate value.

What term is often used synonymously with "information hiding" in the context of object-oriented design?

• encapsulation

• abstraction

• inheritance

• polymorphism

What are the two basic object-oriented principles discussed for creating levels of abstraction in object-oriented design?

• composition and inheritance

• 1. abstraction and encapsulation

• inheritance and polymorphism

• polymorphism and encapsulation

Why do many expert programmers recommend against using multiple inheritance in Python?

• 1. It leads to code duplication

• 1. It is difficult to implement

• 1. It violates the principles of OOP

• It is less useful than it sounds

Why is composition considered a good choice when one object is part of another object?

• 1. It allows for creating more complex objects.

• 1. It simplifies the internal structure of the objects.

• 1. It helps in breaking down complex systems.

• It provides access to the internal workings of the objects.