PwC Data Scientist Interview Questions, Process, and Tips

Q1. How to find 2 nd largest number
Ans. 
To find the 2nd largest number in an array, sort the array in descending order and return the element at index 1.
• Sort the array in descending order

• Return the element at index 1
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Q2. How to join two data frame
Ans. 
Joining two data frames involves merging them based on a common column or index.
• Use pandas merge() function to join data frames based on a common column or index.

• Specify the column or index to merge on using the 'on' parameter.

• Choose the type of join to perform using the 'how' parameter (e.g. inner, outer, left, right).
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Combination logic on python

Q1. Explain classification
Ans. 
Classification is a machine learning technique used to categorize data into different classes or categories based on past observations.
• Classification involves training a model on labeled data to predict the class of new, unseen data points.

• Common algorithms for classification include logistic regression, decision trees, support vector machines, and k-nearest neighbors.

• Examples of classification tasks include spam email...read more
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Q1. Write a prompt to extract key Personal Identifiable Information given a resume
Ans. 
Extracting key Personal Identifiable Information from a resume prompt
• Look for information such as full name, address, phone number, email address, date of birth, and social security number

• Utilize natural language processing techniques to identify patterns and structures in the text

• Consider using regular expressions to match specific formats of personal information

• Ensure data privacy and security measures are in place w
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Q1. Why do you want to for PWC?
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