Python technical questions and ORM, SQL queries
Back End Developer Interview Questions
822 back end developer interview questions shared by candidates
Questions that measure your ability to solve problems lonely without a mentor
Write Java class for a blocking queue: when the queue is empty and read method is invoked, it is blocked until something is on the queue. When the queue is full and write method is invoked, it is blocked until an entry in the queue is available.
(Algorithmic Round) Implement LRU Cache (Variant). Talk about the pros and cons of using this data structure including time complexity. (Design rounds) How would you create an API? Rest or GRPC? Tell me the structure of the payload? JSON or XML? What are you API Methods? How would you make v1 API compatible with v2 API? (object oriented round) There is a code quality round where you will be given buggy, unstructured, code that calculates price of booking a rental car, and ask you to make it production grade. Think about design patterns. Think about business requirements changing. (Design round) There is a system design round with VP of engineering. Design a system that you can offer to companies which can authorize employees into buildings using badges. How would you scale the system out? You must drive the entire conversation, and talk about justification of your ideas.
Q1: How does the Sync process between mobile app and backend app work? Q2: Solve a graph theory question!
They will ask you to list all of your knowledge with various coding languages and frameworks, as well as how you've used these technologies in your past workplaces.
Describe what you are looking for in your next position? What drew you to apply to Unu? Describe the internal development processes you have in your current position What are your salary expectations?
Have you worked with android before?
what are your strengths, what are your weakness, and tell me about a time you had a conflict?
(Live Coding Test Question) PHP: Given a matrix of 0’s and 1’s find the number of groups of 1’s in the matrix. A group of 1’s can be formed if a 1 is present either vertically or Horizontally to the adjacent 1 and not diagonally.
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