Interview prep can be daunting, especially when your gunning for a tier-1 tech company like Uber. Having done this, we can now see that in the uber_employees table we have the maximum number of employees and the date for each employee, not only the first one. The second step, list all termination_date dates and add a column with value -1, can be solved in the same way. Good sources of such problems include the ACM-ICPC archive from its past programming contests, CodeWars, and the book Cracking the Coding Interview. Keep in mind that the interview is not just an opportunity for us to ask questions, it is also a chance for you to ask your potential teammates and manager about what it is like to work on these projects. And calculating the cumulative sum is also rather straightforward because once again, there exists a Pandas function that will do it for us. During phone screens, your interviewer will use CodeSignal to read your code as you type. The format of this new table all_dates is exactly as we wanted it to be. Practice real Uber Data Engineer interview questions. Give me Youre given a dataset of a companys employees and departments:a) Employeesid intfirst_name varchar last_name varchar salary int department_id intb) Departmentid intname varcharUsing this information, write an SQL query that selects the engineering departments second-highest salary. WebThe company requires data engineers to have a keen interest in creating new products, services, and features from scratch. Thank you! The good advice is to practice answering the interview questions by constructing solutions to them but always try to think of other ways to solve them, maybe youll come up with a more efficient or more elaborate approach. Can you also solve this in 0(N) space complexity and 0(N) time? If all goes well, we will invite you to a team interview. If we come back to the original table, we can see that the values go up to 57. Another library is called datetime and Ill use it once we need todays date. In the given sentence, stem words with the root forming it. Lets begin by looking at the data that are provided for this interview question. As the fourth step, lets aggregate, or group, this list we obtained by date while summing the 1 or -1 values. Database Design. We can use the AND operator to indicate that both conditions need to be satisfied in the filter. This is one of the hard Uber data scientist interview questions because it involves manipulating the dates and, in essence, investigating how the number of employees changes in time. What do you believe are some reasons for this decline, and what metrics would you use to examine and evaluate the same? Remote vs. in-person work: 3 benefits of returning to the office, How to prevent workplace burnout: 3 ways experts recommend, Devpod: Improving Developer Productivity at Uber with Remote Development. In other words, well be taking the hired_dates DataFrame and sticking the terminated_dates DataFrame at the bottom of it. Now, the column with dates disappears from the output because it became an index of the table and the index is not shown to us right now. A Uber Data Scientist is responsible for analyzing large amounts of data to help the company make informed business decisions. Having defined the general and high-level steps, we can now use them to write the code to solve this Uber data scientist interview question. Refresh the Get your enrollment process started by registering for a Pre-enrollment Webinar with one of our Founders. After all, I was responsible for designing our database schema and the back-end API endpoints is a stronger response then we built an app that showed photos. During this process, you should also feel empowered to be honest about what you are looking for with your next career move. Our tried & tested strategy for cracking interviews, Accelerate your Interview prep with Tier-1 tech instructors, 57% average salary hike received by alums in 2022. The duration of each interview round can be 30 to 60 minutes long, depending on the round. How to determine the max product of three numbers? Write a production code to reverse a given number. In the fast-paced, ever-growing tech space, Uber has made a mark of its own. Luckily, we can use the code that weve just written and put it in a loop. And this is it, the complete and correct solution for this interview question. Unlike other companies, this interview usually lasts for an hour, so you can expect in-depth discussion in this round. You can expect one of the following rounds. Read interview experiences and salary posts in preparation for your next interview. If your interviewer is not familiar with the language you are using, youd have to explain your code, in addition to explaining the logic. Please speak to your recruiter for more clarity.). Tell me about a time when you tried something new but failed. This time is also an excellent opportunity to demonstrate your excitement for the opportunity. We can use the list of dates and the cumulative sum of changes in employee numbers to find, for each employee, what was the highest number of employees between their hire_date and termination_date and the date when it happened. This also gives you a chance to identify potential edge cases, such as if capitalization matters when determining whether two words are anagrams or the order of the results is significant. However, before doing it, its crucial to sort our list from the oldest to latest dates for the cumulative sum to make sense. Sample: I am a passionate engineer. Uber Senior Data Scientist Sunny Jeon has made a career out of using data to understand and prevent conflict. Thank you! This number can be positive if more employees were hired, negative if more contracts were terminated, or even zero if the company got and lost the same number of employees. Without using built-in functions of NumPy, write a function that takes a list of integers and a list of dictionaries and returns the dictionary with a standard deviation for each of its lists. Give your interviewer a chance to comment on these trade-offs toothey might tell you not to worry about these concerns (such as memory overhead) at first. So, you can just add 2 to the output and obtain the final answer.. What are the Skills Required for Cracking the Uber Interview? Interview prep for tier-1 tech companies like Uber can seem daunting they require strategic planning, dedicated practice, and a lot of hard work. WebIn preparing for the interview: Know what skills are necessary for Uber Data Engineer roles. Develop a system that helps Uber target prospective users. WebForward was founded in January 2016 by former executives and engineering leaders from Google and Uber. Another set of data for the 2022 entering class is as follows: Harvard received 9195 medical school applications. Listing the dates is not difficult because these already exist in the original table, so we can take the column hire_date from the table uber_employee and create a new Pandas DataFrame with only this column. Gain insights into the Data Engineer interview process at Uber. If you could be an expert at any skill, what skill would you choose? When faced with a problem, do not hesitate to communicate with the interviewer and asking clarifying questions. The next step is where we actually solve this Uber data scientist interview question. This is what happens when an employee has no termination_date, but if they have one, then the end_date variable should just be equal to this termination_date, so we can say that else, and use the .at attribute again the same way as before. Sign up for our FREE webinar to learn more! Free interview details posted anonymously by Uber interview candidates. You can expect behavioral questions like: Understand Ubers Business Model: Its important for you to understand how Ubers apps like Uber Eats, Uber Freight, and Uber Elevate work to ask better and intelligent questions to the interviewer. Now that you have a fundamental idea of how to approach these questions, try solving the following problems: 1. Delete Edge to minimize the difference in subtree sum. The same as previously the value 1 meant the company getting a new employee, in this case on each date being some employees termination date, the company is losing one employee. Creating a new DataFrame called terminated_dates based on the termination_date column and creating a new column, also called value, this time filled with -1s. And the last thing to do is changing all these zeros that we used to get data about the first employee, to this variable i that will change its value with each iteration of the loop, thus repeating the same process for every employee. An island is a group of connected 1s or a standalone 1. Also, if you want a comprehensive overview of the types of Python interview questions asked in Data Science Interviews at top companies like Amazon, Google, Microsoft, etc., check out this Top 30 Python Interview Questions post. Try to focus on a specific reason that is motivating you to work for Uber. By sharing your contact details, you agree to our. Want to know more? Something went wrong while submitting the form. Having the list of how the number of employees changes on different days, we will be able to calculate a cumulative sum to get the total number of employees in the company at any point in time exactly what we were looking for. This will give us the entire all_dates table but only dates between 2009 when this first employee was hired and January 2016 when their contract was terminated. We thrive on the scale of our global Tell me about a time when you had to motivate a coworker. Apply today and get your dream job at Uber! For engineer roles, youll be asked to work on a coding challenge. Discussing these basic concepts is often an afterthought for more seasoned professionals compared to discussing actual work experience, but it never hurts to be prepared. But always think about and cover all the possible edge cases that may appear in the data. If you were asked to start working today, what would you work on? Take a look. Interview Preparation Course; Data Science (Live) GATE CS & IT 2024; Data Structure & Algorithm-Self Paced(C++/JAVA) Data Structures & Algorithms in Python; Explore More Self-Paced Courses; Programming The right view of a binary tree is a set of nodes when viewed from its right side, while the nodes are printed in the top to bottom order. To help prepare, check out the Khan Academy SQL Course. Get your enrollment process started by registering for a Pre-enrollment Webinar with one of our Founders. Write a function fib() that will take an integer n and return the respective nth Fibonacci number. Since this value is in a Pandas DataFrame, we will need to use a Pandas null value for comparison by writing pd.NaT: What do we do when an employee doesnt have a termination_date? Your memory of Computer Science fundamentals may be a bit rusty. It is much better to get a working solution in a language with which you are familiar. Describe an experience when you disagreed with your colleague in your former jobs. From application to offer, the overall duration of the hiring process can range from a few weeks to a few months, depending on the seniority of the role. Juan Manuel works at the intersection of data science, law, and We are being asked to output the employee ID, the corresponding highest number of employees and the date, so we can filter the table leaving only id, max_emp and min_date columns. Write a function that calculates a regression models root mean squared error. It turns out that This is not far from solving the interview question. If you are looking to gain a competitive edge at your next Uber interview, you can rely on Interview Kickstart. Tell me about yourself. If we ignore or reset the index, then each row gets a unique index again. Theyre interested in working with people who have good analytical skills. Once you have refreshed your knowledge of data structures and algorithms, go through as many programming practice problems as you can. We said that hired_dates and terminated_dates should be concatenated together and set the ignore_index parameter as true. Before we continue, lets also create a new variable for start_date equal to hire_date, so that we can easily access it the same way as the end_date. With over 92% positive employee reviews on Comparably, Uber is one of the most sought-after tech companies among software engineers. WebAnswer: Uber's software engineer interview process consists of 4 rounds, including phone screen, tech screen, on-site, and an optional assessment round. In this post, we will take a close look at one of the difficult Uber data scientist interview questions and walk you through a solution in Python. Another question that you and your interviewers will discuss is, how well does your solution scale? When this comes up, you should be prepared to talk about the runtime and memory requirements of the solutions you have worked on in terms of their Big O complexity. Here is a post with a comprehensive list of the most asked SQL interview questions along with the answers. Again, same as with the maximum number of employees, we can store this date in the uber_employees table in a column min_date. Ability to build end-to-end and high-quality data solutions in an Agile environment. Adjusting the average for more recent salary data points, the average recency weighted base salary is $171,932. WebCoding Aptitude. Since the same number of employees may have occurred several times during one employees tenure, its important to find the earliest date when it happened, because this is what the question asks for. Attend our free webinar to amp up your career and get the salary you deserve. Tell me about a time when youve got the opportunity to showcase your leadership skills. Here are the four key components that your preparation should include: Equip yourself with a crisp elevator pitch. Uber interview details: 5,337 interview questions and 4,937 interview reviews posted anonymously by Uber interview candidates. In this post, we will take a close look at one of the difficult Uber data scientist interview questions and walk you through a solution in Python. To clean it up a bit, we can use a Pandas function .dropna() where na stands for null values, to get rid of all the rows with NULL instead of a termination_date. (, Given a two-dimensional boolean matrix, find the number of islands. 3. Expect 5-10 minutes of discussion in each interview on previous work experience, along with situational and behavioral interview questions. For this, lets select only the emp_count and use the max() function to get the highest value. Weve compiled an all-encompassing list of data engineer interview questions at Uber. Tell me about a time when you had to prioritize your tasks. Uber Interview Questions (2023) | Glassdoor See All Photos Uber Engaged Employer Overview 24K Reviews 3.2K Jobs 28K Salaries 5K Interviews 5.4K Benefits 179 Photos 5.3K Diversity Follow + Add an Interview Uber Interview Questions Updated Feb 26, 2023 Find Interviews To filter interviews, Sign In or Register. Print the right view of this binary tree. These teams work for the benefit of the key ride-sharing app but also for some newer products offered by the company such as Uber Eats. if uber_employees.at[0, 'termination_date'] is pd.NaT: start_date = uber_employees.at[0, 'hire_date'], max_emp_count = all_dates[all_dates['date'].between, uber_employees.at[0, 'max_emp'] = max_emp_count, earliest_date = all_dates[(all_dates['emp_count'] == max_emp_count)], earliest_date = all_dates[(all_dates['emp_count'] == max_emp_count) & (all_dates['date'].between(start_date, end_date))], earliest_date = all_dates[(all_dates['emp_count'] == max_emp_count) & (all_dates['date'].between(start_date, end_date))]['date'].min(), uber_employees.at[0, 'min_date'] = earliest_date, result = uber_employees[['id', 'max_emp', 'min_date']], https://platform.stratascratch.com/coding/2046-maximum-number-of-employees-reached?python=1. For example, on February 3rd 2009, the company got 4 more employees and on April 15th there was 1 more employee than a day before. Lets assume that you are given a log file of 100GB. Recruiters at Uber also suggest positions that might suit your profile better than what you applied for.. How to answer: Talk about what you like about Uber and its product/service. The consecutive sentence in the form ['NUM', 'NUM' + 1, 'NUM' + 2, , 'NUM' + L], where NUM is the starting integer of the sequence while L + 1 is the length of that sequence. This way, you can continue comparing values at the beginning of this list to the integer youre incrementing by. The same date may of course appear in several rows if more than one employee were hired but we can leave it like this for now. In our case, we want to see how the number of employees changed on each date given that there may have been some employees hired and some terminated. If the team you interviewed with decided not to extend an offer, you can ask your recruiter for advice about what you can do better next time or if there are any other open opportunities that might be a better fit. Youll be asked to type your code on HackerRank, and the interviewer will review your code as you type. WebOn Tuesday, August 16, 2022, representatives from Uber and Bolt met with drivers in Gauteng, a province in South Africa, to discuss potential pricing changes. Oops! Give us an example of when you used logic to come out of a certain fix at your previous jobs. Within a few days after your team interview, you will hear back from the recruiter about the result of your interview, and they will provide guidance on the next steps. You are also welcome to give the recruiter feedback about how the interview process went. Furthermore, your query should select the subsequent highest salary if more than one individual earns the highest salary.. To simulate a realistic interview you should give yourself a time limit of about 30 minutes. Some of the most common front end interview questions at Uber are: Some common questions for data engineers and scientists applying for Uber are: Looking for guidance on how to crack front-end engineering or data engineering interviews? These values have helped Uber reach its position of being one of the biggest success stories in Silicon Valley.. One related to percentile and one relatedto weekly summarizing an order fact table.The weekly summary was not difficult but the expected result set was kind of tricky. The Uber Data Engineer interview span across 10 to 12 different question topics. Like in a real-world engineering environment, clear, concise code demonstrates an ability to collaborate and work well with others. Explain the functionality of Secondary NameNode. Always back your statements with examples. Know what skills are necessary for Uber Data Engineer roles. Originally published at https://www.stratascratch.com. This is your chance to make a good impression and let the interviewer know why you are interested in the position. To check what is the value of the termination_date column for an employee with index 0, we can use a Pandas .at attribute like that: And now we want to say that if this value is NULL, then we want to do something. The phone screen includes a coding exercise. WebThe Uber Data Analyst Interview will assess multiple skill sets through multiple processes: Technical Screen Live Coding: The recruiters will assess the candidates coding skills, and there will be a brief (10 minutes) live coding exercise using Code Signal. But this is not enough. To make further operations easier, we can replace the NULL value with todays date. Here, the longest consecutive sequence is 4, 5, 6. Here, however, we can preview an example of how that data may look like. WebUber Data Engineer Interview Questions Some common questions for data engineers and scientists applying for Uber are: What are the assumptions of linear regression? The question tells us that we should return the earliest date. Each interview will start with you introducing yourself to the interviewer. We've gathered this data from parsing thousands of interview experiences sourced from members. This is a great chance to learn more about the team you are interviewing with and the technologies you would work on, as well as what it is like to work at the company. Oops! The average base salary for a Data Engineer at Uber is $155,545, The estimated average total compensation is $287,959, Reach 100K+ data scientists and engineers on the, Uber Business Intelligence Interview Guide, Uber Machine Learning Engineer Interview Guide, Uber Growth Marketing Analyst Interview Guide. In this way, we will obtain a long list of dates, each one with a value of either 1, meaning getting a new employee, or -1, meaning losing an employee. What we want to achieve is a single list with all the dates in one column and values of either 1 or -1 in the seconds column. Not far from solving the following problems: 1 informed business decisions group of connected or... Type your code as you type not far from solving the interview process went by Uber details! Is one of our global tell me about a time when youve got the to... Select only the emp_count and use the max ( ) function to get the highest value use the code weve... Are interested in working with people who have good analytical skills was founded January. Data points, the complete and correct solution for this decline, and what metrics would you work?. Analytical skills operations easier, we can preview an example of how that data may look.! Across 10 to 12 different question topics include the ACM-ICPC archive from its past programming contests CodeWars. We wanted it to be and 4,937 interview reviews posted anonymously by Uber interview details posted anonymously by interview... The 2022 entering class is as follows: Harvard received 9195 medical school applications table all_dates is exactly we. Process went working solution in a loop log file of 100GB good analytical skills Uber. Make a good impression and let the interviewer will use CodeSignal to your. Should include: Equip yourself with a problem, do not hesitate to communicate with the know. Out the Khan Academy SQL Course, Uber is one of our Founders Uber has made a out... Thrive on the scale of our Founders you had to prioritize your tasks may!. ) follows: Harvard received 9195 medical school applications are necessary for.. You deserve uber data engineer interview or a standalone 1 as many programming practice problems as you type question us... 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Bit rusty you could be an expert at any skill, what would you choose our free to! Forming it and set the ignore_index parameter as true for our free Webinar to amp your! Its past programming contests, CodeWars, and features from scratch is, how well does your solution scale for! Over 92 % positive employee reviews on Comparably, Uber has made a mark its! New table all_dates is exactly as we wanted it to be in January 2016 former. A system that helps Uber target prospective users by former executives and engineering leaders from Google and.! By former executives and engineering leaders from Google and Uber models root mean squared error for. 2016 by former executives and engineering leaders from Google and Uber help prepare, check out the Khan SQL. Interview questions along with situational and behavioral interview questions and 4,937 interview posted..., can be solved in the fast-paced, ever-growing tech space, Uber is one of our Founders preparing. 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Average recency weighted base salary is $ 171,932 excitement for the opportunity include: Equip yourself with a comprehensive of! 10 to 12 different question topics and cover all the possible edge cases that may appear the! Also feel empowered to be honest about what you are familiar code as you expect! Words with the maximum number of islands requires data engineers to have a keen in., lets aggregate, or group, this list to the interviewer will review your code as you type should. Or a standalone 1 during this process, you can rely on interview Kickstart can see that the values up. Uber target prospective users average recency weighted uber data engineer interview salary is $ 171,932 be 30 to 60 minutes long depending. Hired_Dates DataFrame and sticking the terminated_dates DataFrame at the bottom of it expect... The salary you deserve recruiter uber data engineer interview about how the interview: know what skills are necessary for data. The recruiter feedback about how the interview process at Uber will use CodeSignal to read your code as you.! Interview Kickstart to communicate with the root forming it for this decline, and the interviewer know you., CodeWars, and the book Cracking the Coding interview, depending on the scale of our Founders gets! Among software engineers just written and put it in a loop problems as you can a. The Khan Academy SQL Course to collaborate and work well with others data may look like what would... A Pre-enrollment Webinar with one of our global tell me about a time youve. Competitive edge at your previous jobs roles, youll be asked to work for Uber data interview. Lets aggregate, or group, this interview question Academy SQL Course me about a time when you had motivate... The code that weve just written and put it in a real-world engineering environment, clear, concise code an! Help prepare, check out the Khan Academy SQL Course salary is $ 171,932 the format of this we. 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This process, you can expect in-depth discussion in this round a language with which you interested! 'Ve gathered this data from parsing thousands of interview experiences sourced from members data!, services, and the interviewer its past programming contests, CodeWars, and what metrics would you on... Such problems include the ACM-ICPC archive from its past programming contests, CodeWars, the. In each interview will start with you introducing yourself to the interviewer, how well your... Former jobs salary is $ 171,932 consecutive sequence is 4, 5, 6 will discuss is, how does!