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4 Rounds ~21 Days Hard
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The Interview Loop

Recruiter Screen (30 min)

Standard fit check, behavioral questions, and resume overview.

Technical Loop (3-4 Rounds)

Deep dive into domain knowledge, coding, and system design.

Interview Question Bank

Machine Learning Engineer • Coding • medium

Given the root of a binary tree, collect a tree's nodes as if you were doing this: Collect all the leaf nodes, remove all the leaf nodes, and repeat until the tree is empty.

#Tree #Depth-First Search #Binary Tree
Practice
Machine Learning Engineer • Coding • medium

Design a class which receives a list of words in the constructor, and implements a method that takes two words word1 and word2 and returns the shortest distance between these two words in the list. The method will be called repeatedly.

#Array #Hash Table #Two Pointers #Design
Practice
Machine Learning Engineer • Coding • easy

You have a long flowerbed in which some of the plots are planted, and some are not. However, flowers cannot be planted in adjacent plots. Given an integer array flowerbed containing 0's and 1's, and an integer n, return true if n new flowers can be planted without violating the no-adjacent-flowers rule.

#Array #Greedy
Practice
Machine Learning Engineer • Coding • medium

Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree.

#Tree #Depth-First Search #Binary Tree
Practice
Machine Learning Engineer • Coding • hard

Given an array of points where points[i] = [xi, yi] represents a point on the X-Y plane, return the maximum number of points that lie on the same straight line.

#Array #Math #Geometry #Hash Table
Practice
Machine Learning Engineer • Coding • easy

Given two strings s and t, determine if they are isomorphic. Two strings s and t are isomorphic if the characters in s can be replaced to get t.

#Hash Table #String
Practice
Machine Learning Engineer • Coding • medium

Given an integer array nums, return the number of triplets chosen from the array that can make triangles if we take them as side lengths of a triangle.

#Array #Two Pointers #Sorting #Greedy
Practice
Machine Learning Engineer • Coding • medium

Given a collection of numbers, nums, that might contain duplicates, return all possible unique permutations in any order.

#Array #Backtracking
Practice
Machine Learning Engineer • Coding • hard

Design an algorithm to serialize and deserialize a binary tree. There is no restriction on how your serialization/deserialization algorithm should work.

#String #Tree #Depth-First Search #Breadth-First Search #Design
Practice
Machine Learning Engineer • Coding • medium

Given an integer array nums and an integer k, return the kth largest element in the array. Note that it is the kth largest element in the sorted order, not the kth distinct element.

#Array #Divide and Conquer #Sorting #Heap (Priority Queue) #Quickselect
Practice

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Senior Engineer

Focuses on core competencies, system constraints, and clear communication.

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