Page 240 - AI Ver 3.0 Class 11
P. 240

13.   In the given example, what is the correct output for creating a DataFrame using lists or arrays?

                      import pandas as pd
                      data = [['Mayur', 25],
                              ['Esha', 30],
                              ['Vedant', 28]]
                      df = pd.DataFrame(data, columns=['Name', 'Age'])
                      print(df)
                      a.      Name  Age                                b.     Name      Age
                        0  Mayur  25                                     0    25      Mayur
                        1  Esha  30                                      1    30       Esha
                        2 Vedant  28                                     2    28     Vedant
                      c.     Name   ID                                 d. ID    Name    Age
                        0  Mayur    25                                   0    Mayur      25
                        1  Esha     30                                   1     Esha      30
                        2  Vedant  28                                    2    Vedant     28
                 14.   Which method allows you to delete rows from a DataFrame?
                      a.  remove()                                     b.  drop()
                      c.  delete()                                     d.  pop()

                 15.   Which Pandas method can be used to fill missing values with a specific value, such as the mean of a column?
                      a.   dropna()                                    b.  fillna()
                      c.  interpolate()                                d.  insert()

                 16.   Which of the following is the default delimiter that is used by the read_csv() function in Pandas?
                      a.   Semicolon (;)                               b.  Tab (\t)
                      c.   Comma (,)                                   d.  Space ( )

                 17.   Which of the following is a characteristic of the Iris dataset?
                      a.   It contains data for 200 samples of iris flowers.
                      b.  Each sample has six features.

                      c.   The  samples belong to three species of iris flowers.
                      d.  It is primarily used for regression tasks.
                 18.   Which of the following metrics measures the proportion of correctly classified instances out of the total instances?

                      a.   Precision                                   b.  Accuracy
                      c.   Recall                                      d.  F1-score
                 19.   Which code snippet would you use to calculate the precision of a classification model in Python using the sklearn library?

                      a.   metrics.accuracy_score(y_test, y_pred)
                      b.  metrics.confusion_matrix(y_test, y_pred)
                      c.  metrics.precision_score(y_test, y_pred, average='weighted')

                      d.  metrics.f1_score(y_test, y_pred)
                 20.   Which of the following metrics would be most appropriate to use when the cost of false positives is high?
                      a.   Accuracy                                    b.  Precision
                      c.   Recall                                      d.  F1-score



                    238     Touchpad Artificial Intelligence (Ver. 3.0)-XI
   235   236   237   238   239   240   241   242   243   244   245