question stringlengths 11 711 | domain stringclasses 8
values | company stringclasses 30
values | year float64 2.02k 2.02k ⌀ | coding stringclasses 2
values | personal_exp stringclasses 2
values | category float64 0 1 |
|---|---|---|---|---|---|---|
What considerations should be made when testing hundreds of hypotheses with many t-tests? | Data Analytics | Stripe | null | no | no | 0 |
What data should we look at? | Data Science | Stripe | null | no | no | 0 |
What data would you collect and analyze, and what factors would you consider when making pricing recommendations? | Data Science | Stripe | null | no | no | 0 |
What do you understand by a random forest model? | Data Science | Stripe | null | no | no | 0 |
Can you program in scripting languages like Perl or Python? | Data Engineer | Visa | null | no | no | 0 |
Describe a strategy to minimize latency for users accessing the Visa network from different parts of the world. | Data Engineer | Visa | null | no | no | 0 |
Describe your experience with Agile methodology in data engineering teams. | Data Engineer | Visa | null | no | yes | 0 |
Explain a project where you created data-driven business solutions using Hadoop, Hive, Spark, and NoSQL databases. | Data Engineer | Visa | null | no | no | 0 |
Explain how data partitioning works in a distributed computing environment and its impact on query performance. | Data Engineer | Visa | null | no | no | 0 |
Explain the difference between shallow copy and deep copy in Python. | Data Science | Visa | null | no | no | 0 |
Explain the difference between UNION and UNION ALL in SQL and provide use cases for each. | Data Science | Visa | null | no | no | 0 |
Given a list of integers, and an integer N, write a function sum_to_n to find all combinations that sum to the value N. | Data Engineer | Visa | null | yes | no | 0 |
Given a list of strings of letters from a to z, create a function, sum_alphabet, that returns a list of the alphabet sum of each word in the string. | Data Engineer | Visa | null | no | no | 0 |
Given a table of bank transactions with columns: id, transaction_value, and created_at representing the date and time for each transaction, write a query to get the last transaction for each day. | Data Engineer | Visa | null | yes | no | 0 |
Given two sorted lists, write a function to merge them into one sorted list. Whats the time complexity? | Data Engineer | Visa | null | yes | no | 0 |
Given two strings, string1 and string2, write a function str_map to determine if there exists a one-to-one correspondence (bijection) between the characters of string1 and string2. | Data Engineer | Visa | null | yes | no | 0 |
Have you used CI/CD and automation tools like Jenkins and Git in data engineering projects? | Data Engineer | Visa | null | no | no | 0 |
How do you ensure Test-Driven Development in your data engineering projects? | Data Engineer | Visa | null | no | no | 0 |
How many transactions listed as paid have an amount greater or equal to 100? | Data Science | Visa | null | no | no | 0 |
How to answer an SQL query that selects the two students with the closest SAT scores and calculates their score difference. | Data Science | Visa | null | no | no | 0 |
How to ensure that all nested lists, regardless of their depth, are properly flattened and all integers are collected into a single, one-dimensional array? | Data Engineer | Visa | null | no | no | 0 |
How would you detect and remove outliers in a time series dataset? | Data Science | Visa | null | no | no | 0 |
How would you evaluate a model that predicts whether a piece of news is relevant when shared on X? | Data Science | Visa | null | no | no | 0 |
How would you handle a recurring situation where a coworker consistently arrives late to scheduled weekly meetings? | Data Science | Visa | null | no | no | 0 |
If tasked with reducing the processing time of Visas payment authorization system, what approach would you take to optimize the existing workflows? | Data Engineer | Visa | null | no | no | 0 |
Lets say we have a table with ID and Name fields. The table holds over 100 million rows, and we want to sample a random row in the table without throttling the database. Write a query to randomly sample a row from this table. | Data Engineer | Visa | null | yes | no | 0 |
Lets say you have a categorical variable with thousands of distinct values. How would you encode it? | Data Science | Visa | null | no | no | 0 |
Say you are tasked with designing a data warehouse for a new online retailer. How would you design the system? | Data Engineer | Visa | null | no | no | 0 |
Tell me about a time you failed. | Data Engineer | Visa | null | no | no | 0 |
Tell me about a time you went above and beyond in a project. | Data Engineer | Visa | null | no | no | 1 |
Tell me something about yourself that is not in your resume. | Data Engineer | Visa | null | no | no | 1 |
We are building a system to detect fraudulent transactions in near real time. How would you build and implement a solution to identify these transactions? | Data Engineer | Visa | null | no | no | 0 |
What are the challenges of training Machine Learning models on large-scale datasets? | Data Science | Visa | null | no | no | 0 |
What are the key concepts like data locality and partition keys in data partitioning and how do they impact query performance? | Data Engineer | Visa | null | no | no | 0 |
What did you learn from the experience of the critical failure in your previous role? | Data Engineer | Visa | null | no | yes | 1 |
What do you know about Visa Inc.? | Data Science | Visa | null | no | no | 1 |
Based on the customer spending data, how would you determine what the next partner card should be? | Data Analytics | Wells Fargo | null | no | no | 0 |
Based on the following table, how would you measure the success of the email campaign and write a query to analyze the success of your campaign. | Data Analytics | Wells Fargo | null | yes | no | 0 |
Can you describe a situation where a mistake you made had an impact on your team? | Data Science | Wells Fargo | null | no | yes | 1 |
Can you describe non-linear estimates? | Data Science | Wells Fargo | null | no | no | 0 |
Can you describe the projects you have worked on? | Data Science | Wells Fargo | null | no | no | 1 |
Can you discuss a project you have worked on in the past? | Data Science | Wells Fargo | null | no | no | 1 |
Can you explain the difference between lists and tuples? | Data Science | Wells Fargo | null | no | no | 0 |
Can you explain your Master's project in detail? | Data Science | Wells Fargo | null | no | no | 0 |
Can you provide an example of a guesstimate question you were asked? | Data Science | Wells Fargo | null | no | no | 0 |
Create a function that returns a list of words that are not present in both input sentences, treating words as case-insensitive. | Data Engineer | Wells Fargo | null | no | no | 0 |
Describe a data project you worked on. What were some of the challenges you faced? | Data Engineer | Wells Fargo | null | no | yes | 1 |
Describe a time when a mistake you made impacted your team. | Machine Learning | Wells Fargo | null | no | yes | 1 |
Describe an analytics experiment that you designed. How were you able to measure success? | Data Engineer | Wells Fargo | null | no | no | 0 |
Describe how you align with JD? | Data Analytics | Wells Fargo | null | no | no | 1 |
Describe your projects? | Machine Learning | Wells Fargo | null | no | no | 0 |
Difference between tfidf and word2vec | Data Science | Wells Fargo | null | no | no | 0 |
Do you have experience with Power BI and SSRS? | Data Engineer | Wells Fargo | null | no | yes | 0 |
Due to an ETL error, the employees table did an insert instead. How would you write a query to get the current salary for each employee? | Data Analytics | Wells Fargo | null | yes | no | 0 |
Elaborate your experience with Python in data analytics. | Data Engineer | Wells Fargo | null | no | yes | 0 |
Explain the steps you follow during ETL design and implementation. | Data Engineer | Wells Fargo | null | no | no | 0 |
Explain why f1 score is used for the whole model instead of other metrics like recall or precision? | Data Science | Wells Fargo | null | no | no | 0 |
Explain your Masters Project in detail? | Machine Learning | Wells Fargo | null | no | no | 0 |
Find the running total from SQL. | Data Analytics | Wells Fargo | null | no | no | 0 |
Give an example of your database design skills. | Data Engineer | Wells Fargo | null | no | no | 0 |
Given a employees and departments table, select the top 3 departments with at least ten employees and rank them according to the percentage of their employees making over 100K in salary. | Data Analytics | Wells Fargo | null | no | no | 0 |
Given a list of strings (sentences) containing poems, return a dictionary where the keys are word frequencies and the values are lists of words with those frequencies, with all words processed as lowercase. | Data Engineer | Wells Fargo | null | no | no | 0 |
Given an employees and departments table, select the top 3 departments (with at least 10 employees) ranked by the percentage of employees earning over 100K. | Data Engineer | Wells Fargo | null | no | no | 0 |
Given two lists, write a function fund_return to calculate the total profit gained from investing in the index from the start to the end date. | Data Analytics | Wells Fargo | null | yes | no | 0 |
How can you select records without duplicates from a table? | SQL | Wells Fargo | null | no | no | 0 |
How comfortable are you presenting your insights? | Data Analytics | Wells Fargo | null | no | no | 1 |
How do you clean and organize a large dataset? | Data Analytics | Wells Fargo | null | no | no | 0 |
How do you ensure data quality and governance in your data engineering processes? | Data Engineer | Wells Fargo | null | no | no | 0 |
How do you handle challenging situations and tight deadlines in a fast-paced environment? | Data Engineer | Wells Fargo | null | no | no | 1 |
How do you see yourself contributing to the companys goals? | Data Engineer | Wells Fargo | null | no | no | 0 |
How have you provided leadership and insights in your previous analytical projects? | Data Engineer | Wells Fargo | null | no | no | 1 |
How to get the datatype of a data frame? | Data Science | Wells Fargo | null | no | no | 0 |
How to get the datatype of a data frame? | Machine Learning | Wells Fargo | null | no | no | 0 |
How to handle complex data scattered across various data sources during data integration? | Data Engineer | Wells Fargo | null | no | no | 0 |
How to sum the missing value in a data frame? | Machine Learning | Wells Fargo | null | no | no | 0 |
How to sum the missing value in a data frame. | Data Science | Wells Fargo | null | no | no | 0 |
How would we know if we have enough data to create an accurate enough model? | Data Engineer | Wells Fargo | null | no | no | 0 |
How would you investigate if the new email campaign actually led to the increase in the conversion rate, and that the increase wasnt instead the result of other factors? | Data Analytics | Wells Fargo | null | no | no | 0 |
How would you speed up a slow SQL query? | SQL | Wells Fargo | null | no | no | 0 |
Implement the Fibonacci algorithm in three different methods (Recursively, Iteratively, Using Memoization) | Data Analytics | Wells Fargo | null | no | no | 0 |
Lets say youre working on keyword bidding optimization. Youre given a dataset with two columns. One column contains the keywords that are being bid against, and the other column contains the price thats being paid for those keywords. Given this dataset, how would you build a model to bid on a new unseen keyword? | Data Engineer | Wells Fargo | null | no | no | 0 |
Pseudo code for Fibonacci series printing in Python. | Data Analytics | Wells Fargo | null | no | no | 0 |
Rate your communication skills on a level of 1-10. | Data Engineer | Wells Fargo | null | no | no | 1 |
Retrieve only last 7 days data from table. | Data Analytics | Wells Fargo | null | no | no | 0 |
Talk about a time when you had trouble communicating with stakeholders. How were you able to overcome it? | Data Analytics | Wells Fargo | null | no | no | 1 |
Tell about a time that you had to make a difficult decision. | Data Analytics | Wells Fargo | null | no | no | 1 |
Tell me a time when your colleagues did not agree with your approach. What did you do to bring them into the conversation and address their concerns? | Data Engineer | Wells Fargo | null | no | no | 1 |
Tell me about a time when you exceeded expectations during a project. What did you do, and how did you accomplish it? | Data Engineer | Wells Fargo | null | no | yes | 0 |
We have two models: one with 85% accuracy, and one 82%. Which one do you pick? | Data Engineer | Wells Fargo | null | no | no | 0 |
What are list and tuples? | Machine Learning | Wells Fargo | null | no | no | 0 |
What are the assumptions of linear regression? | Data Analytics | Wells Fargo | null | no | no | 0 |
What are the assumptions of OLS? | Data Science | Wells Fargo | null | no | no | 0 |
What are the OLS assumptions? Describe Non-linear estimates. | Machine Learning | Wells Fargo | null | no | no | 0 |
What are the standard questions for a project manager position at Wells Fargo? | Machine Learning | Wells Fargo | null | no | no | 1 |
What data analysis software have you worked with? | Data Analytics | Wells Fargo | null | no | no | 0 |
What do the SQL commands √ and ∩ do? | SQL | Wells Fargo | null | no | no | 0 |
What do you do to stay updated with the latest trends and advancements in data engineering and analytics? | Data Engineer | Wells Fargo | null | no | no | 0 |
What do you know about SQL? | Data Analytics | Wells Fargo | null | no | no | 0 |
How do you approach image segmentation, and what are some applications? | Machine Learning | null | null | no | no | 0 |
A Box has 12 Red Cards and 12 Black Cards. Another Box has 24 Red Cards and 24 Black Cards. You Want to Draw Two Cards at Random From One of the Two Boxes, One Card at a Time. Which Box has a Higher Probability of Getting Cards of the Same Color and Why? | Data Analytics | null | null | no | no | 0 |
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