DSA Dec Batch Numpy,Pandas,Matplotlib Quiz

What function is used to display a Matplotlib plot?

• plt.display()

• plt.show()

• plot.display()

• plot.show()

What does plt.title('Sales Data') do?

• Sets the label for the x-axis to 'Sales Data'.

• Sets the title of the plot to 'Sales Data'.

• Adds a legend with the label 'Sales Data'.

• Creates a subplot titled 'Sales Data'.

What does np.ones((2, 3)) create?

• A 2x3 array filled with ones.

• A 3x2 array filled with ones.

• A 2x2 array filled with ones.

• A 3x3 array filled with ones.

What is the purpose of np.random.randn(3, 2)?

• Generates random integers.

• Generates an array of random floats from a standard normal distribution.

• Creates an identity matrix.

• Generates an array with evenly spaced values.

What does plt.ylabel('Temperature') do?

• Adds a label to the y-axis with 'Temperature'.

• Sets the title of the plot to 'Temperature'.

• Adds a legend with the label 'Temperature'.

• Creates a subplot with the label 'Temperature'.

How can you filter rows in a DataFrame df where the 'Price' column is less than 50?

• df.filter('Price' < 50)

• df['Price'] < 50

• df[df.Price < 50]

• df.filter_price(50)

How do you check for missing values in a DataFrame df?

• df.check_missing()

• df.isna()

• df.missing()

• df.null()

How do you select a column named 'Population' from a DataFrame df?

• df['Population']

• df.Population

• df.iloc['Population']

• df.loc['Population']

What does np.arange(1, 6, 2) generate?

• [1, 3, 5]

• [1, 2, 3, 4, 5]

• [2, 4, 6]

• [1, 4]

How do you rename the column 'OldCol' to 'NewCol' in a DataFrame df?

• df.rename(columns={'OldCol': 'NewCol'})

• df.rename_column('OldCol', 'NewCol')

• df['OldCol'].rename('NewCol')

• df['OldCol'] = 'NewCol'