Example 1: Input: numCourses = 2, prerequisites = [[1,0]] Output: true Explanation: There are a total of 2 courses to take. To take course 1 you should have finished course 0. So it is possible. Example 2: Input: numCourses = 2, prerequisites = [[1,0],[0,1]] O...
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### Chat billing calculation You are building a billing component for a chat-based AI platform that charges users based on token usage. Each chat session generates a record containing: user_id, input_tokens, output_tokens, plan You are given a list of chat ses...
I interviewed for an intern position. The first interviewer had been at Amazon for 8 years. I was given a simplified version of a Top K problem. The remaining 40 minutes were spent on behavioral questions, which felt like a casual conversation. When I mentione...
**Round 1:** (60 min, interviewer was a senior engineer on the team) I was asked to dive deep into my projects, with case study questions interspersed throughout the discussion. The coding question involved a toy Pandas DataFrame. I had to perform simple data...
The interviewer used a company org chart as the example, which made the tree structure easy to picture. The question was Remove Company Org Leaves by Round: https://www.chillinterview.com/learn/coding-interview-questions/remove-company-org-leaves-by-round. I w...
I had a 60-minute online assessment with two questions. Here are the problems: **Question 1: Maximum Number of Palindromic Strings** Problem Statement: You are given an array of n strings arr, where each string consists only of lowercase English letters. In on...
The interviewer used a simple grid example to explain the storage room. The question was Virus Spread in a Storage Room: https://www.chillinterview.com/learn/coding-interview-questions/virus-spread-in-a-storage-room. I was asked to describe how the virus would...
My onsite interview consisted of four behavioral rounds and two technical rounds. The behavioral questions focused on customer needs, verifying AI information, team conflict, and addressing unfamiliar and complex problems. I used two technical projects and two...
I think I failed due to my coding performance, and likely the ML coding as well. The interviewers were all very nice, but unfortunately, my abilities were limited. **Coding:** The question seemed to be custom-made. I was given a string as a "password book", an...
The interview consisted of two back-to-back rounds, each lasting one hour. In the first round, I was asked behavioral questions focusing on conflict scenarios, dive deep examples, and instances of going beyond my responsibilities. I was also asked about genera...
