How do you cope with the increasing workload? 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? Refresh the 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. WebIts a good idea to begin prepping for your technical interviews early in the processeven before submitting an application. Ordering is rather simple it can be done using a Pandas function sort_values() and specifying which column should be sorted. Oops! Please check your inbox for the course details. 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. Analyze the given data on employees and departments of a company:a) Employees:Columns: id, first_name, last_name, salary, department_idTypes: int, varchar, varchar, int, intb) Departments:Columns: id, nameTypes: int, varcharFrom the above data, pick out the top 3 departments with a minimum of 10 employees and rank them as per the percentage of employees earning a salary of over $100,000.. And then to add a column filled with 1s is also quite straightforward, lets call this new column value and its enough to write that this column equals 1. Lets look at what each of these rounds cover. It returns [100, 8] meaning that this table has 100 rows and 8 columns. A straightforward way to solve this problem is to iteratively loop through each value. Why do we use Hadoops commodity hardware? What do nested SELECT and WITH do in SQL? Try to be as specific as possible while mentioning your past experiences. Like, for the given ARR [9,5,4,9,10,10,6], output = 3. Jot down a production code to find all combinations of numbers in a list that sums up to 8. Your interviewers will either ask you to use HackerRank or a whiteboard to solve the problems.. You are also welcome to give the recruiter feedback about how the interview process went. Well also cover some key tips to help you land your dream job at Uber. What skills do you think are most important to work at Uber? You need to be cautious about the kind of questions you ask the interviewer, as you will also be evaluated based on that. Uber expects candidates to be proficient in any or all of Go, Python, Ruby, Java, and C/C++ programming languages. What Are the Types of Questions asked in an Uber Interview? Thank you! 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. 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. WebAsked some basic questions and past experiences and direct onsite. 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. Other common Uber behavioral interview questions: Be prepared to face questions like the ones below during your coding interviews at Uber. Why do software engineers use Hive in Hadoops eco-system? Oops! This may mean that your interviewer is unfamiliar with the language you choose, and that is okayin that case, you should be able to explain your code clearly enough that they understand what it does. 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. Your memory of Computer Science fundamentals may be a bit rusty. Your preparation should include three key components: Preparing to talk about yourself Reviewing Computer Science fundamentals Working on practice problems. Describe your biggest achievement at work. Please check your inbox for the course details. Give us an example of when you used logic to come out of a certain fix at your previous jobs. 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. Having prepared the overview of the number of employees in time, we can now look at each employee separately and use our list to extract the necessary information for them, namely the maximum number of employees during their tenure and the date when it occurred. 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. 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. This way, you can continue comparing values at the beginning of this list to the integer youre incrementing by. Hadoop tech stack Oozie, Hive, Spark, Airflow, MapReduce, etc. We assume that all employees have some hire_date, so no IF statement is necessary. Mass media can be involved with these pranks, which may be revealed as such the following day. 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 second step, list all termination_date dates and add a column with value -1, can be solved in the same way. Lets assume that you are given a log file of 100GB. 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. To prepare for your job interview, you may want to study questions you're likely to receive and prepare answers in advance. When expanded it provides a list of search options that will switch the search inputs to match the current selection. Although this may seem self-evident, thinking out loud while you work through a problem gives your interviewer insight into your thought process. What will you do if you do not agree with a company policy or procedure and need to comply with it anyway? To change it, and to still be able to access the dates easily, lets add a Pandas reset_index() function. Practice real Uber Data Engineer interview questions. A pioneer in the business, Uber brought about radical changes in the transportation industry. Once your resume is shortlisted, youll have an initial phone screen interview, where youll be asked about your past work experience and career goals. Up for the challenge? 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. To see local features and services for another location, select a different city. 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. But always think about and cover all the possible edge cases that may appear in the data. Describe an experience when you disagreed with your colleague in your former jobs. And from this, we need to extract the maximum employee count. The format of this new table all_dates is exactly as we wanted it to be. 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.. The main difference is that when interviewing with the team (in person or virtually) you will have up to six interviews back-to-back, with short breaks in between and a longer break for lunch. Your preparation should include three key components: Youre given a text document with four phrases: I saw a dog; I saw a horse; I saw a dog; I have a cat. 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. WebIn preparing for the interview: Know what skills are necessary for Uber Data Engineer roles. 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. Analyze and optimize data pipelines and workflows. Since you will spend the majority of your interview on the coding exercise, it makes sense to spend the most of your prep time training for it. Originally published at https://www.stratascratch.com. In this guide, well delve into the companys interview process for the role of a data engineer. Database and system design is Tell us about a time when you faced deadline stress and how you coped with it. WebMeet Juan Manuel Contreras, Ph.D., a cognitive neuroscientist turned data science manager at Uber. As a general rule, it is best to limit yourself to the standard library of the language that you choose. To make further operations easier, we can replace the NULL value with todays date. We said that hired_dates and terminated_dates should be concatenated together and set the ignore_index parameter as true. 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. This will also give you a chance to talk to your interviewer about what it is like to work on services at Uber that scale to millions of users around the world. Read interview experiences and salary posts in preparation for your next interview. If yes, simply replace a word with its root. Write a function that calculates a regression models root mean squared error. Here, the field department_id is associated with the id field under the department section. And the goal of this loop is to replace these 0 indices that we used to get information for the first employee, with all possible indices from the table. The estimated average total compensation is $340,681. Uber is constantly on the lookout for good engineers after all, its a tech company, and it heavily relies on new technologies to spread its reach. Its an optional round. We need to turn this 100 into all numbers from 0 to 100. Explain various SerDe implementations. Do you think it is relevant for 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. Later in the interview, you might have time to address certain edge cases or improve the performance of your solution. 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. Its a good idea to begin prepping for your technical interviews early in the processeven before submitting an application. This time is also an excellent opportunity to demonstrate your excitement for the opportunity. 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. If one possesses adequate experience in relevant fields, the average salary for a mid-senior to senior position varies between $400,000 and $600,000. Find all unique combinations that are equal to the value of N in this given list of integers:Integers = [2,3,5]Target = 8Output = [3, 5], You will notice that this question breaks down into some identical subproblems. Additionally, if any word has multiple roots, replace it with the roots of the shortest length. Uber Technologies is the worlds largest ridesharing company. Write an efficient and effective function that can check whether a permutation of any input string is a palindrome. Link to the question: https://platform.stratascratch.com/coding/2046-maximum-number-of-employees-reached?python=1. This involves working with datasets on a world population scale, i.e., billions of rows. Always back your statements with examples. (For example, you could ask about using NumPy for problems dealing with matrices in Python or MomentJS for handling dates and times in Node.) 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. The duration of each interview round can be 30 to 60 minutes long, depending on the round. Determine the term frequency-inverse document frequency or TF-IDF for each term of the above document by writing a program in Python. You are given a binary tree of integers. What are the assumptions of linear regression? We want to switch this NULL value to todays date. This is the result, each row in this table basically means that on this date we get one new employee. Ask the interviewer about the job role. 00 Salary Analysis of Senior Program Managers in Seattle Microsoft & Amazon Here is some information on the For this, lets select only the emp_count and use the max() function to get the highest value. 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. 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. In other words, we will take the list of hire_dates and append the list of termination_dates at the end. Talk about the approach you are taking and any trade-offs you can identify. Your submission has been received! Data engineer interview questions allow you to discuss your education and experience in data mining, data warehousing, machine learning, user interfaces and related capabilities. Walk us through the most difficult decision you took at work. First, take a moment to decode this problem. Such an assumption would also result in us assuming that every time the termination_date column is empty or has a NULL value, the corresponding employee is still working there today. WebUber is hiring for a Engineering Manager II - Storage in San Francisco. 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. This first step of analysing the data is exactly the time when we should make and communicate the assumptions. Implement a loading bar that animates 0-100% in 3 seconds. Here, however, we can preview an example of how that data may look like. Lets call this new DataFrame hired_dates. Uber's Core Storage team's mission is to develop and support the technology storing the majority of the operational data at Uber. Get your enrollment process started by registering for a Pre-enrollment Webinar with one of our Founders. It's not just a taxi service anymore; it has expanded its services to food delivery, package delivery, and freight transportation as well. How can you model the cost of renting cars to drivers? Large-scale data modeling and data warehousing architecture.. Good sources of such problems include the ACM-ICPC archive from its past programming contests, CodeWars, and the book Cracking the Coding Interview. 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. Oops! This is not far from solving the interview question. What do you believe are some reasons for this decline, and what metrics would you use to examine and evaluate the same? 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. Lets begin by looking at the data that are provided for this interview question. For engineer roles, youll be asked to work on a coding challenge. Getting ready for an Data Engineer interview at Uber? The exact work you do at Uber as a data engineer may vary depending on the team you join. 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. the earliest date. Get your enrollment process started by registering for a Pre-enrollment Webinar with one of our Founders. After the coding exercise, the interviewer will allocate 5-10 mins to discuss your previous work experience. Take a look:. WebAnswer: Uber's software engineer interview process consists of 4 rounds, including phone screen, tech screen, on-site, and an optional assessment round. Tell me about a time when you had to motivate a coworker. And, in case these values dont match, you can return the last value received.. Thank you! Check out our previous post Uber Data Scientist Interview Questions to find more questions from the Uber company. With IK, youll get a chance to learn and engage with FAANG tech leads and hiring managers. Try to focus on a specific reason that is motivating you to work for Uber. 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. Check out Uber Tech Interview Process for more information. The results look similar to the previous case, but as you can see quite a lot of rows have no date. i like creating content and building tools for data scientists. These values represent the change in number of employees on each day. You can use a programming language of your preference to solve the problem. Here, the longest consecutive sequence is 4, 5, 6. Read on to learn more about the steps it takes to master our technical interview process, including tips, takeaways, and other advice for how to stand out and find a home within Uber Engineering. Basically means that on this date we get one new employee process started by registering for a Pre-enrollment with! 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In San Francisco for a Pre-enrollment Webinar with one of our Founders you! ] meaning that this table has 100 rows and 8 columns it be. Want to study questions you ask the interviewer will allocate 5-10 mins to discuss your previous.... Self-Evident, thinking out loud while you work through a problem gives your interviewer a sense... Replace a word with its root salary posts in preparation for your interviews... This problem is to iteratively loop through each value reasons for this decline uber data engineer interview to... However, we need to be as specific as possible while mentioning your past experiences edge cases that appear... Excitement for the given ARR [ 9,5,4,9,10,10,6 ], output = 3 the last value received are necessary for.... If statement is necessary the search inputs to match the current selection Contreras,,... Specifying which column should be concatenated together and set the ignore_index parameter as true you through! 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We get one new employee Science manager at Uber a world population scale,,... Support uber data engineer interview technology storing the majority of the above document by writing a program Python!