Python Proficiency for College Students

What is a class in Object-Oriented Programming?

• A class is a blueprint for creating objects that defines attributes and methods.

• A class is a method that performs actions.

• A class is a function that executes code.

• A class is a type of variable that stores data.

Explain the concept of inheritance in Python.

• Inheritance allows a class to create new methods only.

• Inheritance is a way to delete attributes from a class.

• Inheritance is a mechanism in Python where a class can inherit attributes and methods from another class, enabling code reuse and a hierarchical class structure.

• Inheritance is a method to combine two classes into one.

What is the purpose of the __init__ method in a class?

• To create a new class from an existing one.

• To delete an object's attributes when a class instance is destroyed.

• To define a class's methods and functions.

• To initialize an object's attributes when a class instance is created.

How do you create a file in Python?

• Create a file by using create_file('filename.txt').

• Use write('filename.txt') to create a file in Python.

• Use open('filename.txt', 'w') to create a file in Python.

• Use open('filename.txt', 'r') to create a file in Python.

What is the difference between 'read' and 'readlines' in file handling?

• Both 'read' and 'readlines' return the same type of data, just formatted differently.

• The difference is that 'read' returns a single string, whereas 'readlines' returns a list of strings, each representing a line in the file.

• 'read' reads the entire file at once, while 'readlines' reads it in chunks.

• 'read' returns a list of lines, while 'readlines' returns a single string.

How can you write data to a file in Python?

• Use 'with open("filename.txt", "w") as file: file.write("data")'.

• file.write("data") to open("filename.txt").

• Use 'open("filename.txt") as file: file.write("data")'.

• with open("filename.txt", "r") as file: file.write("data").

What is exception handling in Python?

• Exception handling in Python is a way to manage errors using try and except blocks.

• Python does not support exception handling.

• Exception handling is done using only the raise statement.

• Exception handling in Python is only for syntax errors.

How do you raise an exception in Python?

• raise 'Error message'

• throw Exception('Error message')

• raise Exception()

• raise Exception('Error message')

What is the purpose of the 'try' and 'except' blocks?

• The purpose of 'try' and 'except' blocks is to handle exceptions and errors in a controlled manner.

• To define functions in Python

• To create loops in Python

• To declare variables in Python

Name a popular Python library used for data analysis.

• NumPy

• Matplotlib

• Scikit-learn

• Pandas