Apple interview questions

Asked me to refactor code on the screen

Companies: Apple

Asked questions about relationship building, tell me about myself, what i liked about my work, time I learnt something new, how i keep up-to-date with current technology, how I use AI in my work (advised against being extreme with ie completely handing your work to AI and completely hating AI).

Asked questions about relationship building, tell me about myself, what i liked about my work, time I learnt something new, how i keep up-to-date with…

Companies: Apple

Asked what I did in the research project. All questions are expanded based on me project.

Companies: Apple

Best Time to Buy and Sell Stock II

Given daily stock prices, compute the maximum profit you can achieve with unlimited buy/sell operations while holding at most one share at a time (you…

Companies: Apple, Bloomberg, Meta, Oracle

Array · Dynamic Programming · Greedy

Binary Search Tree to Greater Sum Tree

Transform a BST so each node's value becomes its original value plus the sum of all keys greater than it; this is typically done with…

Companies: Apple

Binary Search Tree · Binary Tree · Depth-First Search · Tree

Build leak-safe sklearn model with calibration

Companies: Apple

Feature Engineering · Supervised Learning

Compare DCN v1 vs v2 and A/B test

Companies: Apple

CTR Prediction & Ads ML · Experiment Design (A/B Testing)

Construct a Churn-Prediction Pipeline Using Scikit-Learn

Companies: Apple

Feature Engineering · Supervised Learning

deep copy of linked list with random ptr in C++

Companies: Apple

Descibe the pipeline of our project.

Companies: Apple

Design a distributed key-value store

Partitioned storage with replication: durable writes, availability during partitions, ownership changes, and convergence after failures.

Companies: Apple, Airbnb, Avalara, Canva +4

consistency · failure-recovery · hot-keys · partitioning

Design a distributed message queue like RabbitMQ

Durable work distribution: replicated queue state, visibility leases, duplicate delivery, poison messages, and hot-queue partitioning.

Companies: Apple, Amazon, Instacart

backpressure · dead-letter-queues · delivery-semantics · partitioning

Design a validation controller from scratch for a feature of your choice. Make sure to state assumptions and design considerations.

Companies: Apple

Design Siri-vs-GPT query routing

Companies: Apple

ML System Design · Model Evaluation

Explain CNN shapes, params, and trade-offs

Companies: Apple

Explain dataset size, generalization, and U-Net skips

Companies: Apple

Computer Vision · ML Fundamentals

Find All Lonely Numbers in the Array

Find all integers that occur exactly once in nums and whose immediate neighbors (x-1 and x+1) do not appear in the array; return these "lonely"…

Companies: Apple

Array · Counting · Hash Table

Find First and Last Position of Element in Sorted Array

Given a sorted (non-decreasing) array, return the starting and ending indices of a target value (or [-1, -1] if it’s not present). The challenge is…

Companies: Apple, Amazon, Meta, NVIDIA +3

Array · Binary Search

Group Anagrams

Group the input strings into lists of anagrams — i.e., strings that contain the same multiset of letters — and return the groups in any…

Companies: Apple, Amazon, Arize Ai, Bloomberg +14

Array · Hash Table · Sorting · String

Homography from scratch in coding language of your choice

Companies: Apple

House Robber

Given an array of nonnegative integers representing house values, find the maximum sum you can obtain by selecting houses with the constraint that no two…

Companies: Apple, Amazon, Goldman Sachs, Microsoft

Array · Dynamic Programming

How concurrency and threads work

Companies: Apple