Mashdemy 11-15 AI/ML

Which of the following methods is used to concatenate two DataFrames in Pandas?

•  pd.append()

•  pd.concat()

•  pd.merge()

• pd.join()

Which pandas method can be used to find the unique values in a DataFrame column?

• • A).unique_values()

• • B) .distinct()

• • C).unique()

• • D) .nunique()

Which type of plot would you use to visualize the distribution of a dataset?

• Bar Graph

• Histogram

• Scatter Plot

• Pie Chart

Which Matplotlib function is used to create a line plot?

• plt.line()

• plt.plot()

• plt.lineplot()

• plt.plotline()

What is the output of the value_counts() method in pandas?

• • A) The count of non-null values in a DataFrame column.

• • B) The sum of all values in a DataFrame column.

• • C) The frequency of each distinct value in a DataFrame column.

• • D) The average of all values in a DataFrame column.

How would you select rows in a DataFrame where the values in the 'Study_Hours' column are greater than 3?

• • A) df[df['Study_Hours'] < 3]

• • B) df[df['Study_Hours'] > 3]

• • C) df.loc[df['Study_Hours'] > 3]

• • D) Both B and C

What parameter is used in plt.plot() to set the marker type?

• A) markerstyle

• B) markertype

• C) marker

• D) mark

• Answer: C) marker

• • A) markerstyle

• • B) marker

• • C) markertype

• • D) mark

What is the output of np.zeros((2, 3))?

• • A) A 2x3 array filled with zeros.

• • B) A 3x2 array filled with zeros.

• • C) A 2x2 array filled with zeros.

• • D) A 3x3 array filled with zeros.

What will be the output of the following code?
import numpy as np

arr = np.array([1, 2, 3, 4, 5])

print(np.sum(arr))

• 11

• 10

• 20

• 15

What will be the output of the following code?
import numpy as np

arr = np.array([[1, 2, 3], [4, 5, 6]])

print(arr[1, 2])

• 2

• 3

• 6

• 5