Acing the Interview

Which regularization can help with features selection

• L1/Lasso
• L2/Ridge

When does Vancouver WiDS first start

• 2018
• 2017
• 2019

Which of the following is required to test the null hypothesis of F-distribution

• critical value
• significance level
• degrees of freedom
• all the options

[Select all that applies and submit] What are the common techniques to address overfitting problem

• regularization
• bagging
• boosting
• early stopping
• cross validation

Which of the following can be used to analyse whether the null hypothesis can be rejected.

• T-score
• Z-score
• P-value
• F-value

More often, Null Hypothesis is expressed as which of the following

• There is no relationship between two quantities
• There is strong relationship between two quantities

In statistics, statistical significance is attained when p-value is __________ the significance level

• greater than
• less than
• equal to

What is the time complexity to find a element in a dictionary (n=size of the dictionary)

• O(1)
• O(n)
• O(n^2)

In a confusion matrix, how to calculate recall

• recall = (true_positive + true_negative) / total
• recall = true_positive / (true_positive + false_negative)
• recall = true_positive / (false_positive + true_positive)

What is the Fibonacci sequence

• 0, 1, 1, 2, 3, 5, 8, 13, 21....
• 2,4,6,16,32,64...
• 1, 3, 6, 10, 15, 21, 28, 36, 45....