Data Analysis Questions

What is a class in Python?

• A blueprint for creating objects

• A built-in Python function

• A module in Python

• A method inside a function

Which of the following is true about inheritance in Python?

• A class can only inherit from one parent class.

• A subclass cannot override methods of the parent class.

• A subclass can inherit attributes and methods from a parent class.

• Inheritance is not supported in Python.

What is the purpose of exploratory data analysis (EDA)?

• To build machine learning models

• To perform initial investigations on data and discover patterns

• To visualize data for presentations

• To clean and preprocess data

How do you create an instance of a class Car?

• my_car = Car

• my_car = new Car()

• my_car = Car()

• my_car = Car.new()

What is the importance of understanding unique values in categorical columns during EDA?

• It helps in building machine learning models

• It helps in visualizing data distributions

• It indicates the presence of outliers

• 
  It provides insights into the diversity of data

Which library is commonly used for data analysis and manipulation in Python?

• TensorFlow

• Pandas

• Matplotlib

• Scikit-learn

What is the purpose of data cleaning in data preprocessing?

• To remove outliers and noise from the data

• To perform statistical analysis

• To summarize the data

• To visualize the data

What is the primary purpose of downsampling and upsampling labels in a dataset?

• To decrease the size of the dataset

• To increase the overall size of the dataset

• To remove outliers from the dataset

• To balance the distribution of labels in the dataset

How do you remove an element from a set in Python?

• remove()

• delete()

• discard()

• Both A and C

Which is the basic library used for plotting?

• NumPy

• SciPy

• Matplotlib

• Pandas