Exploring Dataframes and Matplotlib - Grade XII

What is the primary library used for creating dataframes in Python?

• matplotlib

• numpy

• scikit-learn

• pandas

How do you create a dataframe from a dictionary in pandas?

• df = pd.DataFrame.from_dict(dictionary)

• df = pd.DataFrame(dictionary.values())

• df = pd.DataFrame(dictionary.items())

• df = pd.DataFrame(dictionary)

What method would you use to view the first five rows of a dataframe?

• dataframe.take(5)

• dataframe.head(5)

• dataframe.first(5)

• dataframe.slice(0, 5)

How can you filter rows in a dataframe based on a condition?

• Use boolean indexing, e.g., df[df['column_name'] condition].

• Use the drop method to remove unwanted columns.

• Use the groupby method to aggregate data.

• Apply the sort_values function to rearrange rows.

What function is used to add a new column to an existing dataframe?

• df.add_column('new_column', values)

• df.insert('new_column', values)

• df.append_column('new_column', values)

• df['new_column'] = values

How do you rename columns in a pandas dataframe?

• df.change_columns({'old_name1': 'new_name1'})

• df.update_column_names(['new_name1', 'new_name2'])

• df.rename(columns={'old_name1': 'new_name1', 'old_name2': 'new_name2'}, inplace=True) or df.columns = ['new_name1', 'new_name2']

• df.columns.rename({'old_name1': 'new_name1'})

Which matplotlib function is commonly used to create a line plot?

• plt.plot()

• plt.chart()

• plt.draw()

• plt.line()

What parameter would you adjust to change the color of a plot in matplotlib?

• marker

• style

• color

• linewidth

How do you add a title to a matplotlib plot?

• Set title with plt.set_title('Your Title Here')

• Use plt.title('Your Title Here')

• Call plt.title() without any arguments

• Use plt.add_title('Your Title Here')

What method is used to save a matplotlib figure to a file?

• save

• savefig

• export

• store