uber data engineer interviewuber data engineer interview

Lets look at what each of these rounds cover. How much money does a data engineer make. And this is it, the complete and correct solution for this interview question. The question also specifies that the output should have the employee ID, greatest number of employees that worked for the company during the employees tenure, and first date that number was reached. 00 Salary Analysis of Senior Program Managers in Seattle Microsoft & Amazon Here is some information on the WebApril Fools' Day or All Fools' Day is an annual custom on 1 April consisting of practical jokes and hoaxes.Jokesters often expose their actions by shouting "April Fools!" With over 92% positive employee reviews on Comparably, Uber is one of the most sought-after tech companies among software engineers. Thank you! Each on-site interview Question 1: What is the software engineer hiring process like at Uber? 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. Thank you! To accomplish this, consider choosing clear variable and function names and separating parts of your solution into distinct functions, particularly if your interviewer introduces additional complications to the problem later during the interview. Write a function fib() that will take an integer n and return the respective nth Fibonacci number. How can you resolve an SQL querys duplicate data points? Onsite: 3 Tech rounds, 1 hiring Manager and 1 BR. What are the components of a Hadoop application? Originally published at https://www.stratascratch.com. They create data pipelines and connect data from one system to another. Uber Jobs & Careers - 525 Open Positions | Glassdoor Uber Overview 24K Reviews -- Jobs 28K Salaries 5K Interviews 5.4K Benefits 179 Photos 5.3K Diversity + Add a Review Uber Jobs Hiring? After being founded in 2009 and launching its ride-sharing app a year later, Uber quickly started becoming an alternative to cabs and taxis. This Interview will be divided into three parts. Check whether your single-linked list contains a cycle. In other words, we will take the list of hire_dates and append the list of termination_dates at the end. It works similarly to the igonre_index parameter we saw earlier but now its much more important to actually use it. How to determine the max product of three numbers? How do you cope with the increasing workload? 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. This is the result, each row in this table basically means that on this date we get one new employee. at the recipient. If you arrive at a point where you have to choose between two different data structures, explain why you chose the one you did. To simulate a realistic interview you should give yourself a time limit of about 30 minutes. If the opportunity seems like a good fit for both your career goals and our needs, your Recruiter or Sourcer will schedule a technical phone screen between you and a Software Engineer or Engineering Manager on the team you are applying to. WebPreparing For A Data Engineering Interview: How To Design A Data Warehouse For.A Food Delivery App Seattle Data Guy 52.4K subscribers Subscribe 957 Share 37K views But when initiating the loop, its not enough to say that the variable i should be able to, in this case, a number 100. 5 Tips to Prepare for Your Uber Data Engineer Interview 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. Your memory of Computer Science fundamentals may be a bit rusty. Most importantly, use your technical interviews as a way to determine if the role is a good match for your career goals and skill set. Something went wrong while submitting the form. Always back your statements with examples. To get the last index, or the length of the uber_employees table, we can use the shape attribute. Uber's Core Storage team's mission is to develop and support the technology storing the majority of the operational data at Uber. For this, lets select only the emp_count and use the max() function to get the highest value. WebForward was founded in January 2016 by former executives and engineering leaders from Google and Uber. Good sources of such problems include the ACM-ICPC archive from its past programming contests, CodeWars, and the book Cracking the Coding Interview. It is much better to get a working solution in a language with which you are familiar. 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. Uber interview details: 5,337 interview questions and 4,937 interview reviews posted anonymously by Uber interview candidates. Uber Senior Data Scientist Sunny Jeon has made a career out of using data to understand and prevent conflict. It turns out that after finding just a few simple, yet clever steps, this Uber data scientist interview question becomes easier to solve. Print a function to calculate a given numbers square root up to two points precision. Like in a real-world engineering environment, clear, concise code demonstrates an ability to collaborate and work well with others. Filter Now, we have the overview of how the number of employees changes in time and we still have the dates on which any changes to this number happen. Apply today and get your dream job at Uber! What we will aim to do is to convert the hire and termination dates into the total number of employees on each date when it changes. Print the right view of this binary tree. Try to be as specific as possible while mentioning your past experiences. This will likely include behavioral questions, such as: tell me about a time that you resolved a technical disagreement with a team member or describe a time that you needed to acquire information from someone who was not very responsivehow did you handle it? Being able to talk about your past experiences and what you learned from them gives your interviewer a better sense of your work style. 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. Please check your inbox for the course details. Youre seeing information for Canada . Coding is one of the most fundamental skills that software engineers are expected to be good at. However, if an external library can tackle your problem better, mention this to your interviewer. Given below is a string of integers representing page numbers. Your interviewer will read your codes with HackerRank as you keep working. Try to focus on a specific reason that is motivating you to work for Uber. By sharing your contact details, you agree to our. This is critical in helping us identify the best role(s) to meet both your needs and ours. Here, however, we can preview an example of how that data may look like. Apply here: https://airtable.com/shrdQrwKK7xxGLm6l Subscribe to my data science channel: https://bit.ly/2xYkyUM Get 10% off data engineer interview prep: https://www.interviewquery.com/?ref=datasciencejay Check out our new SQL interview course: https://www.interviewquery.com/courses/data-science-course/lessons/sql Get professional coaching from Jitesh here: https://www.interviewquery.com/coaching Follow us on Twitter: https://twitter.com/interview_query Video Breakdown:00:30 - Clarifying questions about the backend and functionality2:28 - Initial design and solution for latency11:18 - How would you design for analytics19:15 - What does the schema look like all together?22:34 - What's the benefit of a partition?More from Jay:Read my personal blog: https://datastream.substack.com/Follow me on LinkedIn: https://www.linkedin.com/in/jay-feng-ab66b049/Find me on Twitter: https://twitter.com/datasciencejay Uber pays its software engineers an average base salary of $140,000 - $150,000, depending on the job role and experience. WebCoding Aptitude. On July 20th 2013 the same number of employees were hired and terminated, so the change is 0. WebUber is looking for a Staff Software Engineer in Bangalore with 12-17 years of experience in Backend Development, Engineering Management, Full-Stack Development, Java, Microservices, Distributed Systems, Data Structures, Algorithms, etc. For instance, in my previous roles, I collaborated with to . Ordering is rather simple it can be done using a Pandas function sort_values() and specifying which column should be sorted. As department_id is a column referencing another sections primary key, it is a foreign key. However, as you are technically stemming these words, ensure that a root does not simply exist anywhere with its word and is equivalent to the word at its prefix. 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. For example, if you were part of a team developing a full-stack web application, be specific about what you contributed to the project. What are the steps involved in this process? Your interviewers will either ask you to use HackerRank or a whiteboard to solve the problems.. Develop a system that helps Uber target prospective users. Attend our free webinar to amp up your career and get the salary you deserve. A group of friends went on a trip and lent each other money for various purposes. early in the processeven before submitting an application. Something went wrong while submitting the form. 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. Thats because not all employees have a termination date if they still work for the company. Knowing what job interview questions you might be asked is essential that way, you can craft your answers well in advance and feel confident in your responses when the pressure is on. As you can see this returned a number of dates, including some dates from when this employee was not working in the company anymore. Talk about the approach you are taking and any trade-offs you can identify. However, with a well-planned prep strategy, you will be able to ace that interview. In this case, it wont change much but its a good practice to set ignore_index to true in such situations. Juan Manuel works at the intersection of data science, law, and 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. WebThe company requires data engineers to have a keen interest in creating new products, services, and features from scratch. Something that is often overlooked but extremely important is using this exercise to showcase your ability to write readable and clearly organized code. Getting ready for an Data Engineer interview at Uber? 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. For instance, when the given integers are [2,3,5], and the target is 8, you can first solve for the input numbers, i.e., for integers [2,3,5], and the target is 8 - 2 = 6. The next step, once we explored the data, is to formulate the high-level steps for solving this Uber data scientist interview question. The final 5-10 minutes is for you! Tell us three things you did not like about your last job. 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. Can you define Block Scanner and Block in HDFS? The tuple (X, Y, Z) represents each transaction, i.e., person X gave person y $Z. It should include vital details about your background, skills, and previous experience. Large-scale data modeling and data warehousing architecture.. Create a system that offers insights on inherent patterns underneath large volumes of data. Two fairly difficult SQL questions invoving multiple tables and nested relations . all_dates = pd.concat([hired_dates, terminated_dates], all_dates = all_dates.groupby('date').sum(), all_dates = all_dates.groupby('date').sum().reset_index(), all_dates = all_dates.sort_values('date'), all_dates['emp_count'] = all_dates['value'].cumsum(), if uber_employees.at[0, 'termination_date']. Head of Career Skills Development & Coaching, *Based on past data of successful IK students. Explain various SerDe implementations. 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. 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. Note: According to Uber recruiters, a common query they receive during this round is whether it is okay to use outside libraries in your solution. What do you mean by a .hiverc file in MySQL? You can use a programming language of your preference to solve the problem. You can nail your next Data Engineering interview at Following are some examples of responsibilities assigned to data engineers at Uber: Being a tech company at its heart, Uber sets the bar very high for engineers. In this section, weve covered some common interview questions asked at Uber tech interviews. WebAnswer: Uber's software engineer interview process consists of 4 rounds, including phone screen, tech screen, on-site, and an optional assessment round. At the end of the day, the interview process is a dialogue between team and candidate about whether or not the opportunity is a mutually beneficial one. Youre given a text document with four phrases: I saw a dog; I saw a horse; I saw a dog; I have a cat. You are also welcome to give the recruiter feedback about how the interview process went. Uber Data Engineer Interview Questions | Glassdoor See All Photos Uber Engaged Employer Overview 24K Reviews 187K Jobs 28K Salaries 5K Interviews 5.4K You are given a binary tree of integers. If the role you applied for has already been filled or we learn that there is an even better fit for your interests and skillset elsewhere in the company, we will suggest other openings for you to consider applying to. Thank you! Determine the term frequency-inverse document frequency or TF-IDF for each term of the above document by writing a program in Python. 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. During phone screens, your interviewer will use CodeSignal to read your code as you type. After the coding exercise, you and your interviewer will spend about 5-10 minutes discussing questions about your previous work experience. They use a variety of tools and techniques to collect, process, and analyze data from various sources, such as GPS data from Uber's app, customer ratings and feedback, and economic data. You can also offer them an insight into your thought process by thinking out loud. Onsite 1: Design a CCD type system with facts, dims. For some of the questions, weve also included pointers on how to solve the problem, which help you in your interview prep., 1. Your preparation should include three key components: 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. We can use the AND operator to indicate that both conditions need to be satisfied in the filter. 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. Candidates who do not have any questions to ask their interviewer are often viewed as uninterested, so spend some time before your interview thinking of a few topics that pique your interest and would like to learn more about from your interviewer. Coding Interview Cheat Sheet for Software Engineers and Engineering Managers, Cracking the Coding Interview: 9 Extremely Important Things You Should Know. View the full Data Engineer at Uber salary guide. The first thing to do is to check if this employee has a termination_date and, if not, replace the NULL value with todays date. For this, refresh your knowledge of data structures and algorithms. Describe your biggest achievement at work. We offer unmatched tech interview prep for engineers aspiring to join FAANG and other tier-1 tech companies such as Uber.. WebHere are the base salaries of a Data Engineer at Uber grouped into 2 seniority categories. If you were asked to start working today, what would you work on? 5. 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. A pioneer in the business, Uber brought about radical changes in the transportation industry. 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. Describe a time when you took it upon yourself to improve in-house work procedures. Thank you! How can you ascertain the best strategy? 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. 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. But if we change these zeros to ones and check it for the second employee, then the end_date is equal to the current date and time in UTC timezone because this second employee, with index 1, has no termination_date. We thrive on the scale of our global Tell us about a time when you faced deadline stress and how you coped with it. And it doesnt really matter if this first employee has termination_date or not, we will write an IF statement that will cover us in both cases. However, its weekly metrics indicate a slow yet steady decline in the average number of comments per user from March to May in this city. Build systems that offer Uber access to free traffic. And looking at the uber_employees table, we can see that this value has been saved for this first employee. Following are a few more Uber data engineer interview questions on SQL for practice: In addition to Python and SQL problems, you can also expect questions on data engineering basics, Hadoop, and Hive. Head of Career Skills Development & Coaching, *Based on past data of successful IK students. These values represent the change in number of employees on each day. Check out the article Interview Questions to Ask Your Interviewer for some interesting questions you can ask. Walk us through the most difficult decision you took at work. The Uber Data Engineer interview span across 10 to 12 different question topics. This function should have two lists, one representing predictions and the other indicating target values. Preparing for an Uber interview? 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. Youll be asked some behavioral questions like: Tell me about a time you resolved a technical disagreement between two team members and Describe a situation where you had to contact someone unresponsive to collect some information.. After the coding exercise, the interviewer will allocate 5-10 mins to discuss your previous work experience. Keep Your Elevator Pitch Ready. Name these objects. Percentage of employees earning more than $100,000 in salary, Departments must have a minimum of 10 employees. Moreover, if this string is in incorrect page order, return its last number in order.input = 12345678910111213; output = 13input = 12345678; output = 8input = 12345; output = 5. WebUber Data Engineer Interview Questions Some common questions for data engineers and scientists applying for Uber are: What are the assumptions of linear regression? Give us an example of when you used logic to come out of a certain fix at your previous jobs. (For example, you could ask about using NumPy for problems dealing with matrices in Python or MomentJS for handling dates and times in Node.) Gain insights into the Data Engineer interview process at Uber. Here's how you can nail it! 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. 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. In 2021, the company won the Best CEOs for Diversity award ranking based solely on anonymous sentiment ratings from non-Caucasian employees on Comparably. To achieve this, lets use the Pandas concat function. We use a join clause to combine rows of two tables based on a related column between the tables. 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. To prepare, solve as many programming practice problems as you can. This first step of analysing the data is exactly the time when we should make and communicate the assumptions. Since no explanation is given by the question, we are allowed to make such assumptions at an interview and solve the question sticking to them, as long as we communicate these assumptions clearly to an interviewer. WebUber Interview Experience/Asking Suggestions. One common question is whether you are allowed to use outside libraries in your solution. As the fourth step, lets aggregate, or group, this list we obtained by date while summing the 1 or -1 values. Further, you can highlight other ways to resolve duplicate data points, like using GROUP BY to group the data and filter it further. Usually, at an interview you wont be given any actual records, instead, youll see what tables or data frames are there and what are the columns and data types in these tables. 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. How does big data and data analytics increase a companys revenue? Recommended Reading: The Hardest and Easiest Programming Languages to Learn for FAANG Interviews, The Uber on-site will include 4-6 face-to-face interviews on the trot. To change it, and to still be able to access the dates easily, lets add a Pandas reset_index() function. 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. A typical onsite interview for technical roles consists of 4 stages: Uber is different from other tech companies in various aspects. 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. You can suggest using UNIQUE and DISTINCT to eliminate duplicate data points. Your home for data science. Bolt in Cape Town Wherever you are in Cape Town, on a day out on the beach at Camps Bay or on a shopping spree at one of Africas biggest malls, Canal Walk Shopping Centre, always count. In the fast-paced, ever-growing tech space, Uber has made a mark of its own. Next, we can concatenate the two lists together. The biggest thing to remember is to communicate with your interviewer. You are given a 9x9 2D matrix with some empty cells (denoted by 0) along with cells filled with digits (1-9) such that the final matrix is a valid Sudoku solution. This [100, 8] is a list so we can select the first value like that. How can you migrate a 1GB dataset from a NoSQL database to a database based on SQL? Uber hires for software engineer, ML engineer, data engineer, technical program manager, and many more engineering positions. But we can also see that this table still has quite a few columns. Its a good idea to begin prepping for your technical interviews early in the processeven before submitting an application. Write a function to find an index of a rotation point in an array. 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. How do you prioritize tasks while working on multiple projects? Candidates will face 2-3 coding questions in the allotted one hour of the coding interview. Link to the question: https://platform.stratascratch.com/coding/2046-maximum-number-of-employees-reached?python=1. 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. Additionally, make sure that you communicate your motivations to work with Uber adequately., Make sure that your fundamentals of computer science are not rusty during the interview. Interviewers want to know about you and why youre interested in becoming a data engineer. Once your resume is shortlisted, youll have an initial phone screen interview, where youll be asked about your past work experience and career goals. 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. Now that you have a fundamental idea of how to approach these questions, try solving the following problems: 1. This i needs to take values from 0 to the last index of the uber_employees table. Therefore, the role of a data engineer at Uber is considered extremely lucrative.. and the United Kingdom will receive an alumnus interview. Write code in Pandas and return the cumulative percentage of students with scores within the buckets of <100, <90, <75, and <50. 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.

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