2/8/2024 0 Comments Basic data science questionsProblem description: Given a positive integer x, return an integer that is a factorial of x. It needs an exit condition, or it will run indefinitely. Factorials are not defined for negative numbers and the factorial of zero is one.Ī recursive function is a function that calls itself during its execution. Question #7 – Calculate a Factorial Using RecursionĪ factorial of a number is the product of all the integers from that number to 1. The alternative approach would be to reverse the string using Python’s slicing notation ( ), or by using the reversed() functions – but these are Python-specific and likely don’t apply to other programming languages. But what about integers that end with a zero? For example, reversing the number 1200 should result in 21, not 0021.Īnd here’s the output from the test cases: The input number must be in a given range, which is obvious. Seems like a simple question, but we have to think about the edge cases. The input integer x must be in range – return 0 if it isn’t. Problem description: Given a signed (positive or negative) integer x, return x with its digits reversed. Yet another simple programming interview question with a couple of interesting edge cases. You could capture the edge cases with Python’s assert statement.Īre coding interview questions giving you anxiety? Take a break and learn how to develop an R Shiny Dashboard in 10 minutes. You should do additional checks to cover the edge cases – for example, if the value provided to the function isn’t an integer, or if it’s zero or negative. ![]() 15 is also divisible by 3 and 5 individually, and we don’t want Fizz or Buzz printed alone.Īnd here’s the output for our three test cases:Īs you can see, solving the FizzBuzz problem is a no-brainer. For example, the number 15 is divisible with both 3 and 5, so FizzBuzz should get printed. You should check for the FizzBuzz condition first, as it checks for multiple conditions. ![]() ![]() result = “Buzz” if i is divisible by 5.result = “Fizz” if i is divisible by 3.result = “FizzBuzz” if i is divisible by 3 and 5.Problem description: Given an integer n, return a string array result where: This one is a classic and good practice for beginners. Find the First Unique Character in a String.Python Dash vs R Shiny – Learn which is better for your use case. We won’t go over specific database or data science questions, as that’s a topic for another time. We’ve chosen Python because that’s the language most data science interviews will be conducted in, and it takes less time and space to write than Java or C++. Today we’ll share with you the top 7 data science coding interview questions, and we’ll answer them in Python. Data Science Coding Interview Questions and Answers Adding insult to injury, you now also have to worry about computer science.Īlgorithmic questions probably won’t pop up daily on your data science job (if ever), but knowing how to think like a computer scientist elevates your ability to break a single complex problem into a list of smaller, more manageable ones. It can be daunting for beginners, as there are already a ton of data science concepts to learn. Even though you don’t use these languages in the same way as let’s say, backend developers, data science coding interview questions still put a lot of emphasis on computer science fundamentals, such as data structures and algorithms. ![]() If you’re into data science, you know it’s mostly based around SQL, Python, and R.
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