Question 1

When using Python to collect data from an API, which of the following statements about OAuth (Open Authorization) is true?

Options :

A : OAuth is only used for basic username and password authentication.

B : OAuth is a protocol used to convert JSON data to XML data.

C : OAuth encrypts the data payload for each API request.

D : OAuth allows users to approve applications to act on their behalf without sharing their password.

Answer: D

Question 2

Which of the following methods is least likely to be effective when dealing with outliers in a dataset while using Python's Pandas library?

Options :

A : Imputation

B : Deleting the feature column

C : Capping

D : Transformation

Answer: B

Question 3

Which of the following cross-validation techniques is most appropriate when you are working with a dataset where the target variable's classes are imbalanced?

Options :

A : Leave-One-Out Cross-Validation (LOOCV)

B : k-Fold Cross-Validation

C : Stratified k-Fold Cross-Validation

D : Random Split Cross-Validation

Answer: C

Question 4

You are tasked with merging two datasets, df1 and df2, on a common column 'id'. df1 has a column 'value1' and df2 has a column 'value2'. After merging, you need to create a new column called 'total_value' that sums 'value1' and 'value2'. Which of the following code snippets accomplishes this?

Options :

A : df_merged = pd.concat([df1, df2], keys='id')

df_merged['total_value'] = df_merged['value1'] + df_merged['value2']

B : df_merged = df1.merge(df2)

df_merged['total_value'] = df1['value1'] + df2['value2']

C : df_merged = df1.join(df2, on='id')

df_merged['total_value'] = df1['value1'] + df2['value2']

D : df_merged = pd.merge(df1, df2, on='id')

df_merged['total_value'] = df_merged['value1'] + df_merged['value2']

Answer: D

Question 5

You're working with a DataFrame df that contains the exam scores of students in three different classes: Math, Science, and History. You're interested in determining if the mean exam score significantly differs between these classes. What would be the most appropriate statistical test to use?

Options :

A : One-way ANOVA

B : Pearson Correlation Test

C : Paired t-test

D : Independent Samples t-test

Answer: A

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