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Machine Learning Engineer

Given a list of objects which are [currency 1, currency 2, the conversion rate from currency 1 to currency 2], return the rate between any two given currencies. Example: Input: [ ['USD', 'JPY', 110], ['USD', 'AUD', 1.45]...

Backend engineer intern

Given a logs array, each entry being the start and leave time of a user watching a livestream. Find the maximum number of users at any time in the livestream, and the duration of that period.

Software Engineer, Data Architecture

First half of the interview is talking about experience and introduction, but they will give you a codesignal right away during the interview. Be prepared for this Question: we are given a tree where each node has a valu...

Machine Learning Engineer

Given a 2D matrix matrix, handle multiple queries of the following type: Calculate the sum of the elements of matrix inside the rectangle defined by its upper left corner (row1, col1) and lower right corner (row2, col2).

Backend Engineer

Create a data structure that has O(1) time complexity for insert, search, delete and getRandom.

Security Software Developer - Global Security Organization

A lottery is organized where every ticket has a number between lowLimit and highLimit (inclusive). Each ticket is assigned to a box based on the sum of the digits of its ticket number. For example: Ticket 1 goes to box 1...

SWEIII

serialize and de serialize N ary tree input and output and flexiable and you can define by yourslef

SWEIII

Koko loves to eat bananas. There are n piles of bananas, the ith pile has piles[i] bananas. The guards have gone and will come back in h hours. Koko can decide her bananas per hour eating speed of k. Each hour, she choos...

Software Engineer

Given a flat array of objects (representing nodes in a graph), where each node contains: A unique identity (id) A reference to its parent (parent id) A text label (txt) The goal is to reconstruct the hierarchical tree st...

Site Reliability Engineer

You are given an integer array nums containing positive integers. We define a function encrypt such that encrypt(x) replaces every digit in x with the largest digit in x. For example, encrypt(523) = 555 and encrypt(213)...

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 $n \times 2$...

Software Engineer

You are provided with a set of events describing payment lifecycles. Each event references a specific payment id, and multiple events may belong to the same payment. A payment may experience the following event types: AU...

SWE Intern

1. Personal Project Discussion Question Describe your best personal project and why you consider it your best. Detailed Description This question came up after the interviewer looked through my resume and asked me to pic...