Apple Interview Questions
Practice the exact questions companies are asking right now.
Design A/B Test for Search Feature Effectiveness
A/B Testing a Search Button and Measuring Search Quality Scenario A product team wants to evaluate a new search button and ensure search results are h...
Construct a Churn-Prediction Pipeline Using Scikit-Learn
Churn Prediction Pipeline in scikit-learn Scenario You are building a churn prediction model for a subscription business. Churn is defined as whether ...
Compare Normal and Poisson Distributions in Statistics
Modeling Counts vs. Continuous Measurements Scenario You are modeling event counts (e.g., number of clicks) versus continuous measurements (e.g., resp...
Investigate Conversion Drop: Metrics, Analyses, Techniques Explained
Investigating a Conversion Drop After a Feature Release Context A new feature was released on an e-commerce platform. Shortly after, overall checkout ...
Describe Your Role in a Recent Successful Project
Behavioral Question: Recent Project (Data Scientist Phone Screen) Context In a technical phone screen for a Data Scientist role, you'll be asked to wa...
Find Maximum Sum of Contiguous Subarray Length k
Scenario Monitoring website traffic and needing the highest traffic within any fixed-length time window. Question Given an array of positive integers ...
Remove shortest subarray to sort array
Given an integer array nums (length up to 2×10^5), return the shortest subarray [L,R] you can remove so that the remaining elements form a non‑decreas...
Examine Data to Boost Instagram Purchases Effectively
Increasing Instagram In‑App Purchases: Data, Experiments, and Trade‑off Decisions Scenario You are interviewing for a growth analytics role working on...
Design a multimodal RAG assistant
Prompt Design a Retrieval-Augmented Generation (RAG) system that can answer user questions using an internal knowledge base containing multiple modali...
Write a generator for substring pattern matches
Problem Write a generator that scans a string and emits a value whenever a substring matches a given pattern. Input - A string s - A string pattern (n...
Implement TF-IDF scoring for documents
Problem Implement a simplified TF–IDF scorer. You are given: - A list of documents docs, where each document is a string. - A query string q. Tokeniza...
Improve chip performance without process advances
Assume you are working on a digital chip, but the semiconductor process node and basic device technology are fixed: there is no new, faster process an...
Describe common RTL lint warnings and errors
You are writing RTL (e.g., Verilog/SystemVerilog) and run a lint tool on your code. The tool reports items such as: - "Treat as black box" - Combinati...
Explain use cases for clock synchronizers
Assume you are designing a digital system with multiple clock domains. The clocks have different frequencies and unknown phase relationships. You can ...
Solve interval, grid-fill, and heap tasks
You are asked to solve the following algorithmic problems. Problem 1: Concurrent users from online intervals You are given n inclusive time intervals ...
How would you handle an unresponsive teammate?
Scenario You are working on a project with a hard deadline. A teammate who owns a critical task has become unresponsive (misses standups, does not rep...
Implement most_frequent_key without using max()
Problem (Python OOP) You are given two classes. Parent precomputes frequency counts of items (as strings) from an input list. `python class Parent: ...
Clarify status, education, and multi-role strategy
HR Screen: Candidate Information and Minicase Readiness (Data Scientist) 1) U.S. Work Authorization Provide your current employment/visa status and wo...
Diagnose post-release conversion regression rigorously
On July 15, 2025, version 7.3 was fully rolled out. Daily signup conversion fell from 5.4% (July 1–14 baseline) to 4.9% (July 15–21), while spend and ...
Find longest uniform substring after k replacements
Given a string s (ASCII, length up to 2e5) and integer k (0 ≤ k ≤ |s|), return the length of the longest substring that can be turned into all the sam...