Warren

backend engineer

You have a graph of n nodes. You are given an integer n and an array edges where edges[i] = [ai, bi] indicates that there is an edge between ai and bi in the graph. Return the number of connected components in the graph....

Backend engineer

Design google docs

Backend engineer

Was asked to review a pull request. Focus on concurrency and thread safe access https://archive.ph/SV1h2

Security Site Reliability Engineer

Write a function that takes in byte[] as an input of structure: {0, 0, 0, 4, 1, 2, 3, 4 } size | actualMessage And passes the byte[] to some other function. But the size of the message can be more than the length of the...

Software engineer

Problem Statement (Polished): You are given an integer array delta , for example: [1, 3, 2, 8] . You start with an initial sum of 0 and traverse the array from left to right. At each index i , you add delta[i] to your ru...

Senior Software Engineer

Design social media app end to end. focus on live feed and ranking

Senior Software Engineer

Given an array of k lists, each list is sorted in ascending order. Merge all the lists into one sorted list and return it.

Senior AI Engineer

System Design Interview Question: High Volume Sensor Data Platform Design a scalable system to handle data ingestion from a large number of sensors. Requirements: The system should support millions of sensors sending dat...

Senior Software Engineer

Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target. You may assume that each input would have exactly one solution, and you may not use the same eleme...

Software Engineer

/ Building an Analytics System for a Workflow Orchestration Engine We're given a Workflow Orchestration Engine that processes a graph similar to the one shown below. Each execution of the graph is considered a Run. When...

Software Engineer

1. Return the number of unique palindromic substrings of a given string. 2. Create a class that simulates auth tokens with a TTL. Same problem and requirements and solution as https://leetcode.com/problems/design authent...

Senior Software Engineer

System Design (Whiteboard/Verbal Discussion) Question: Design a system that ingests media metadata from different sources/providers, store the metadata in our system, then send media to downstream companies who requests...

Senior Software Engineer

1 hour interview consisted of coding in Google Docs. Question: Implement an ArrayList, and its add and contains methods Int[] arr = new int[N]; Int idx = 0; Int length = N; Public boolean add(int value) { If (this.idx =...

Full stack

Design rate limiter. Input is an array of domain names. We need to output whether or not this domain is allowed. Input: ["abc.com","xyz.com","abc.com"] Conditions 1. Allow 2 requests per domain within 5second interval 2....

Senior Software Engineer

1. There are 4 people (A, B, C, and D) who want to cross a bridge at night. A, B, C and D take 1, 2, 5 and 10 minutes respectively to cross the bridge. There is only one torch with them, and the bridge cannot be crossed...

Research Developer

1. Python default argument why is it modified differently when a function being called multiple times, why is in a lambda function with for loop the outputs are all the same. 2. C++ difference between std optional and st...

Software Engineer

Design a Splitwise app. Start by clarifying requirements and scope before diving into a solution. Throughout this interview, please sketch any components, state/data flows, and the client ↔ API interactions.

Software Engineer

Meeting Scheduler Problem Date: November 13, 2025 Role: Ads Signal Measurement (Software Engineer Interview) Similar LeetCode Question: 253. Meeting Rooms II Description Given an array meetingTimings of size $n \times 2$...

Quantitative Developer Intern

Given variables: max doors : maximum doors you can open : int r : number of total rooms (and the goal room number) : int to , from : arrays signifying that a room from[i] connects to the room to[i] : list[int] , list[int...

senior SDE

1. Introduction & Project Overview 2. Why EliseAI 3. Why Leaving Current Role 4. Challenge / Behavioral Question 5. Went deeper into one project: For technical question, he will give you a piece of code written by javasc...