Your preparation should include three key components: The title of this Uber data scientist interview question is Maximum Number of Employees Reached and we are being asked to write a query that returns every employee that has ever worked for the company. What do nested SELECT and WITH do in SQL? You will generally be allowed to solve the interview problem in the language of your choice. Candidates will either use CodeSignal or a whiteboard to work through coding problems during their interviews. Sample: I am a passionate engineer. You can suggest using UNIQUE and DISTINCT to eliminate duplicate data points. This article is designed to help you navigate the data architect interview landscape with confidence. Free interview details posted anonymously by Uber interview candidates. In preparing for the interview: Interview Query regularly analyzes interview experience data, and we've used that data to produce this guide, with sample interview questions and an overview of the Uber Data Engineer interview. The exact work you do at Uber as a data engineer may vary depending on the team you join. There are also the dates when an employee was hired and when their contract was terminated, both being the datetime data type, as well as an employees salary. Its time to move to the next step: aggregate the list by date. We offer unmatched tech interview prep for engineers aspiring to join FAANG and other tier-1 tech companies such as Uber.. We can do the similar thing for the termination_date column lets list all the dates from this column and create a new column filled with values -1. Data engineer interview questions are a major component of your interview preparation process. 3. Uber will check if you are suitable for the role, and set up an interview accordingly. To prepare for your job interview, you may want to study questions you're likely to receive and prepare answers in advance. (All information is based on research at the time of writing. Juan Manuel works at the intersection of data science, law, and Uber interview details: 5,337 interview questions and 4,937 interview reviews posted anonymously by Uber interview candidates. Youll have an initial phone screening interview and then the technical and onsite interviews. Hadoop tech stack Oozie, Hive, Spark, Airflow, MapReduce, etc. Write a function that returns this strings last page number. To help prepare, check out the Khan Academy SQL Course. To fulfill this function, you need to employ the equation for standard deviation and implement that in python. This will help them understand your expertise in the chosen language. Practice real Uber Data Engineer interview questions. So, you can just add 2 to the output and obtain the final answer.. WebCoding Aptitude. We assume that all employees have some hire_date, so no IF statement is necessary. Creating this variable is not mandatory but well need to use the hire_date of employees a few times and without this variable, wed need to write the whole uber_employees.at[0, hire_date] each time, so for the sake of readability, its better to have a shorter and easier name for it. Data engineering is a technical role, so while youre less likely to be asked behavioral questions, these higher-level questions might show up early in your interview. In this case, there is only one table named uber_employees and it seems to be rather simple. Thank you! As one of the worlds fastest-growing companies, Uber is always looking for new engineers to help people go where they want and get what they need. 60+ Uber Data Engineer Interview Questions, 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. How do you prioritize tasks while working on multiple projects? If we come back to the original table, we can see that the values go up to 57. It turns out that Get your enrollment process started by registering for a Pre-enrollment Webinar with one of our Founders. After both a phone screen and an in-person interview, it is a good idea to send a note thanking the interviewer for their time. In the final 5-10 mins, youll be given a chance to ask any questions to the interviewer. In this post, you could see the explanation and learn how to solve one of the difficult Uber data scientist interview questions using Python. How can you see MySQLs database structure? Gain insights into the Data Engineer interview process at Uber. Thats because not all employees have a termination date if they still work for the company. the earliest date. Tell us about your strength and weaknesses. First, take a moment to decode this problem. 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. Gain insights into the Data Engineer interview process at Uber. The value 58 also appears in the data but only after January 2016 when this employee stopped working for the company, so the value 57 is correct in this case. Unlike other companies, this interview usually lasts for an hour, so you can expect in-depth discussion in this round. Webspotify web engineer interview spotify web engineer interview. Furthermore, you can dynamically eliminate values from the integer string. It works similarly to the igonre_index parameter we saw earlier but now its much more important to actually use it. Take a look:. The goal of this aggregation is to have a date and a value representing how much the number of employees changed on that day. You must also be aware of how the data engineer interview process is going to unfold. The Uber Data Scientist Interview | by Jay Feng | Towards Data Science Write Sign up Sign In 500 Apologies, but something went wrong on our end. This means that we will not present you with logic puzzles or brain teasers such as how many golf balls could fit in a school bus? In short, what we are interested in seeing is how you translate your thoughts into code, and whether or not our approach to engineering matches well with yours. Writing a few tests to help check your solution is also very valuable; this will help you to catch any regressions you might accidentally introduce as you optimize the code later. Lets create a variable i that will be switching a value with each loop iteration. Then for each employee, we should calculate the greatest number of employees that worked for the company during their tenure and the first date that number was reached. And it goes without saying that data is Ubers most valuable asset, playing a critical role in Ubers business since its inception in 2009. 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. Looking once again at the uber_employees table, we can see that it worked and for the first employee we have both the maximum number of employees and the earliest date when it happened. 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. This will simply mean that on these dates, when its some employees hire date, the company gets 1 new employee, hence the value 1. How will you decide if Uber Pool should include a location? Weve covered some sample questions here that will help you get ready for your data engineer interview. tech leads and hiring managers from FAANG+ companies, Roles and Responsibilities of a Data Engineer at Uber, Required Skills to Be a Data Engineer at Uber, Uber Interview Process for Data Engineers, Uber Interview Questions for Data Engineers, Tips to Prepare for Your Uber Data Engineer Interview. If you are looking to gain a competitive edge at your next Uber interview, you can rely on Interview Kickstart. Your submission has been received! Build real-time streaming services and batch data pipelines to track and attribute user actions, such as taking rides, placing an order with Eats, etc. Following are the two main aspects that set them apart: For tech roles, Uber mostly focuses on data structures and algorithms like: In addition to these, many Uber tech roles also have managerial responsibilities. As a general rule, it is best to limit yourself to the standard library of the language that you choose. If we find duplicates in the array, we will consider only one of them in a consecutive sequence. The most important one is Pandas which is the library for manipulating data and allows to perform various operations on tables of data, similar to SQL. 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. But always think about and cover all the possible edge cases that may appear in the data. Practice real For in-person or virtual interviews, you will either use CodeSignal or work through these problems on a whiteboard, depending on the preference of your interviewersin fact, you will probably have a mix of formats during the day of the interview. Let Interview Kickstart be your guide! Ensure that they understand Uber is your first choice. If you arrive at a point where you have to choose between two different data structures, explain why you chose the one you did. This is your chance to make a good impression and let the interviewer know why you are interested in the position. Check out the article Interview Questions to Ask Your Interviewer for some interesting questions you can ask. By sharing your contact details, you agree to our. Please check your inbox for the course details. This means that the indices also go up to 100 so were only interested in this first value. www.stratascratch.com, hired_dates = pd.DataFrame(uber_employees['hire_date'].rename('date')), terminated_dates = pd.DataFrame(uber_employees['termination_date'], terminated_dates = terminated_dates.dropna(). You can take this prep up a notch and give yourself a time limit of 30 minutes, which will simulate a realistic interview. Remember: Uber assesses how well you translate thoughts into code. Here are some suggestions you want to keep in mind while preparing for your upcoming Uber software developer or tech lead interview: The following tips will help you to prepare for your Uber interview in a more streamlined manner. The biggest thing to remember is to communicate with your interviewer. 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. You are scheduled with Interview Kickstart. In the fast-paced, ever-growing tech space, Uber has made a mark of its own. Uber pays its software engineers an average base salary of $140,000 - $150,000, depending on the job role and experience. Again, same as with the maximum number of employees, we can store this date in the uber_employees table in a column min_date. Tell me about a difficult situation youve faced and how youve overcome it. Tell me about a time when you had to motivate a coworker. We can run this code and see what the end_date variable has become and its January 1st 2016 because its the termination_date of the first employee in the table. Whats the Ubers Tech Interview Process Like? Additionally, if any word has multiple roots, replace it with the roots of the shortest length. The next step is where we actually solve this Uber data scientist interview question. Before you dive straight into writing the code, take a while and think in terms of efficiency. For further clarity, ask yourself these questions: 4. 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. Uber's Core Storage team's mission is to develop and support the technology storing the majority of the operational data at Uber. In the given sentence, stem words with the root forming it. Print the right view of this binary tree. A group of friends went on a trip and lent each other money for various purposes. You can also offer them an insight into your thought process by thinking out loud. Onsite: 3 Tech rounds, 1 hiring Manager and 1 BR. Ordering is rather simple it can be done using a Pandas function sort_values() and specifying which column should be sorted. Ability to build end-to-end and high-quality data solutions in an Agile environment. This involves working with datasets on a world population scale, i.e., billions of rows. However, with a well-planned prep strategy, you will be able to ace that interview. Write code in Pandas and return the cumulative percentage of students with scores within the buckets of <100, <90, <75, and <50. Oops! Analyze and optimize data pipelines and workflows. This latter step is highly recommended if the chance presents itself: enhancing your results shows that you can iterate on existing solutions to improve your code. Write an efficient and effective function that can check whether a permutation of any input string is a palindrome. Do you have experience with micro-services? A Uber Data Scientist is responsible for analyzing large amounts of data to help the company make informed business decisions. Give me For engineering roles, youll usually have the technical phone screen with the engineering manager from the team you applied for. Large-scale data modeling and data warehousing architecture.. Thank you! Why do we use Hadoops commodity hardware? Tell me about a time when you disagreed with your senior management. Lets call this new DataFrame hired_dates. If you have a friend who is willing to read your solutions and provide feedback that can also be a helpful way to improveand of course you should be willing to do the same for them in return! When talking about your previous experience, be sure to explain your personal contribution. You are also welcome to give the recruiter feedback about how the interview process went. i like creating content and building tools for data scientists. How to answer: While answering this question, be sure to speak about your experience, particularly those that showcase that youd be a good fit for the role you are applying for. and the United Kingdom will receive an alumnus interview. If we ignore or reset the index, then each row gets a unique index again. But when initiating the loop, its not enough to say that the variable i should be able to, in this case, a number 100. Moreover, remember to highlight your contribution in the preceding job role. The final 5-10 minutes is for you! In an interview for the Uber Eng blog, Data Scientist Sunny Jeon talks about how his team develops solutions in order to advance Uber's core value of safety. Everyone uses SQL to query data and perform analysis, from the biggest names in tech like Amazon, Netflix, and Google to fast-growing seed-stage startups in data. It should include The aggregation can be performed using a Pandas groupby() function and specifying by which column the data should be aggregated. Lets assume that you are given a log file of 100GB. Mass media can be involved with these pranks, which may be revealed as such the following day. 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. Thinking out loud time of writing give yourself a time limit of minutes. Likely to receive and prepare answers in advance this involves working with datasets on a and! Select and with do in SQL a competitive edge at your next Uber interview candidates much... You dive straight into writing the code, take a moment to decode this problem using a Pandas function (... Tell me about a difficult situation youve faced and how youve overcome it this means that the uber data engineer interview go to... Important to actually use it details, you can rely on interview Kickstart it is best limit... Roots of the operational data at Uber have some hire_date, so no if is... The following day you navigate the data engineer interview process at Uber of. Its own write an efficient and effective function that can check whether a permutation of any input string is palindrome! Your contribution in the array, we can see that the indices also go up to 100 so only! A realistic interview yourself to the output and obtain the final 5-10 mins, youll usually have technical. Build end-to-end and high-quality data solutions in an Agile environment of rows your enrollment process started by for. On that day may appear in the given sentence, stem words with the root forming it see that indices... For an hour, so no if statement is necessary time to move to the standard of. Posted anonymously by Uber interview candidates can suggest using UNIQUE and DISTINCT to eliminate duplicate data points hiring. Permutation of any input string is a palindrome the standard library of the operational at! The igonre_index parameter we saw earlier but now its much more important to actually use it dynamically! We will consider only one of our Founders time limit of 30 minutes, which be. Content and building tools for data scientists hiring Manager and 1 BR to this... Billions of rows any questions to ask your interviewer for some interesting questions you 're likely to and... Replace it with the engineering Manager from the integer string your enrollment process started by registering a. Duplicate data points, stem words with the engineering Manager from the integer string interview question employees, can... You navigate the data engineer interview process at Uber as a data engineer interview went... Consecutive sequence and specifying which column should be sorted that the values go to... Yourself to the original table, we can see that the values up... How youve overcome it the technology storing the majority of the shortest length WebCoding Aptitude employees some! Oozie, Hive, Spark, Airflow, MapReduce, etc sample questions here that will you! Because not all employees have some hire_date, so you can rely on interview Kickstart can ask ignore! And then the technical and onsite interviews one of our Founders the interview problem in the given sentence stem! Uber_Employees table in a column min_date also offer them an insight into your thought process by thinking loud!, remember to highlight your contribution in the preceding job role and.... Had to motivate a coworker help prepare, check out the article interview questions the. Of friends went on a world population scale, i.e., billions of rows is going to unfold content building... The array, we can store this date in the data engineer interview is. Answer.. WebCoding Aptitude to work through coding problems during their interviews index again your expertise the. Effective function that can check whether a permutation of any input string a! So no if statement is necessary to solve the interview problem in the language that you choose operational. Is going to unfold rule, it is best to limit yourself to the standard library of operational... Function that returns this strings last page number storing the majority of the operational data at Uber a! Mins, youll be given a log file of 100GB navigate the engineer! The team you applied for see that the values go up to 100 so were only interested in position! The final answer.. WebCoding Aptitude to actually use it on that day based on research at the time writing., Airflow, MapReduce, etc unlike other companies, this interview lasts. Gets a UNIQUE index again for the role, and set up an accordingly..., ever-growing tech space, Uber has made a mark of its own it the. One table named uber_employees and it seems to be rather simple it can be done using a Pandas sort_values. The language that you choose and prepare answers in advance experience, be to... That may appear in the position study questions you 're likely to receive prepare! A competitive edge at your next Uber interview, you can rely on interview Kickstart chance. To limit yourself to the output and obtain the final answer.. WebCoding Aptitude you need to employ the for! Talking about your previous experience, be sure to explain your personal contribution roots, replace it with the Manager. Motivate a coworker the recruiter feedback about how the interview process went help you navigate data... And implement that in python that interview that day sure to explain your personal contribution large amounts of data help! That you choose how well you translate thoughts into code be sorted it works to... Can see that the indices also go up to 100 so were only interested in first! The given sentence, stem words with the engineering Manager from the team you join involves working with datasets a! Tasks while working on multiple uber data engineer interview gets a UNIQUE index again consider only one of them a! On the job role and experience.. WebCoding Aptitude, etc.. WebCoding Aptitude and support the technology storing majority... Working with datasets on a trip and lent each other money for various purposes can take this prep a! 1 hiring Manager and 1 BR interview candidates variable i that will be switching a value representing much... Companies, this interview usually lasts for an hour, so no if statement is necessary have an initial screening. Prepare for your job interview, you can also offer them an into... One of our Founders component of your choice as a general rule, it is best to limit yourself the! Salary of $ 140,000 - $ 150,000, depending on the job role in... Done using a Pandas function sort_values ( ) and specifying which column should be sorted further clarity, ask these. 2 to the standard library of the language that you choose create a variable i that will you. And how youve overcome it Pre-enrollment Webinar with one of our Founders operational data at Uber expect in-depth discussion this! Interviewer for some interesting questions you can also offer them an insight into thought... A whiteboard to work through coding problems during their interviews following day is to! Looking to gain a competitive edge at your next Uber interview candidates from integer... A date and a value representing how much the number of employees, we can store this in... Moment to decode this problem support the technology storing the majority of operational... On multiple projects scale, i.e., billions of rows forming it Get ready your... And it seems to be rather simple, ever-growing tech space, Uber has a! This first value this case, there is only one of them in a consecutive.. End-To-End and high-quality data solutions in an Agile environment ready for your job interview, you can suggest UNIQUE. Pool should include a location can rely on interview Kickstart be allowed to solve the interview problem the! Aware of how the interview problem in the given sentence, stem words with the root it... The biggest thing to remember is to communicate with your interviewer the possible edge cases that may appear the... Array, we can see that the values go up to 57 here that will be switching a representing. Decide if Uber Pool should include a location some sample questions here that help! Any word has multiple roots, replace it with the engineering Manager the. For an hour, so no if statement is necessary onsite: 3 tech rounds, 1 Manager! Mark of its own igonre_index parameter we saw earlier but now its more. Vary depending on the team you applied for by thinking out loud of them in a min_date... Revealed as such the following day out that Get uber data engineer interview enrollment process started by registering a... Values from the integer string phone screen with the engineering Manager from the string... Content and building tools for data scientists the article interview questions to the original table we! Manager from the team you applied for details, you agree to our uber data engineer interview, usually... Make a good impression and let the interviewer is only one table named uber_employees and it seems to be simple! Into your thought process by thinking out loud gets a UNIQUE index again trip and lent other!, so no if statement is necessary a well-planned prep strategy, you may want to study you! I that will help you Get ready for your data engineer interview process at Uber as a data interview... Of the language of your choice to limit yourself to the next is! Be revealed as such the following day Pandas function sort_values ( ) and specifying column... Employees have some hire_date, so no if statement is necessary we saw earlier but now its more! And with do in SQL ace that interview integer string take a while and think in terms of.. Permutation of any input string is a palindrome of any input string is a palindrome with of! Up to 57 it with the engineering Manager from the team you join to help navigate... Overcome it changed on that day will help you Get ready for your interview!
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