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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
18.6k
Companies
980
Updated
11.12.2026
18.6k Questions 980 Companies11.12.2026
PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

Showing 20 results
TikTok logo
TikTok
Medium
Data Engineer

Explain a SQL query result

Given two tables and a specific SQL query, precisely explain the expected result set: which rows are returned, what each column contains, how joins/fi...

Data Manipulation (SQL/Python)
5
0
42 people solved
Jul 15, 2025
Google logo
Google
Medium
Product Manager

Design an Experimentation Platform: Assignment, Logging and Statistics for A/B Tests

You are asked to build the in-house system a product organization will use to run controlled experiments, such as A/B tests, on its website and mobile...

System DesignExperiment Design (A/B Testing)Experiment Analysis & Readout
0
0
7 people solved
Sep 29, 2024
Netflix logo
Netflix
Medium
Product Manager

Netflix Game Tie-In for a Hit Unscripted Series: Product Design

Netflix wants a game built around one of its popular reality shows. How would you design it? `hint Start from what fans already do Think about what re...

Product Design & StrategyProduct Sense
0
0
9 people solved
Nov 26, 2025
Meta logo
Meta
Easy
Data Scientist

Expected impressions per user under random assignment

Random Assignment of Ad Impressions Across Users In an A/B experiment, Y ad impressions are served uniformly at random across X distinct users. Each i...

Analytics & Experimentation
17
0
54 people solved
Jul 12, 2025
Uber logo
Uber
Medium
Frontend Engineer Locked

Build a React Parking Lot Manager

This question evaluates frontend engineering skills in React, including functional components and hooks, client-side state management, UI design, algo...

Software Engineering FundamentalsReact & UI FrameworksState Management
26
0
211 people solved
May 4, 2026
Meta logo
Meta
Medium
Data Scientist

Compute fraud probabilities with Bayes and Binomial

Fake-Account Detection with Binomial Sessions and Bayes Updating You are evaluating a rules-based detector for fake accounts on an online platform. Ea...

Statistics & MathProbability
12
2
106 people solved
Oct 13, 2025
Salesforce logo
Salesforce
Medium
Software Engineer Locked

Present and Defend Recent Research on AI Agents

Present a recent research project from problem framing through evidence, limitations, and your individual contribution. Then make a testable connectio...

Machine Learning
6
0
55 people solved
Jul 12, 2026
Uber logo
Uber
Easy
Data Scientist Locked

Design metrics and A/B test for maps and ETA

This question evaluates proficiency in metrics design, causal inference, and experimentation for product and marketplace features, specifically testin...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
18
0
199 people solved
Nov 9, 2025
Atlassian logo
Atlassian
Medium
Data Scientist

Minimize L1 Distance with k Cluster Centers in Array

One-Dimensional k-Center Clustering With L1 Distance You are given an array of n integers on a number line and an integer k, where 1 <= k <= n. Place ...

Machine Learning
18
0
108 people solved
Jul 12, 2025
Google logo
Google
Medium
Product Manager

Googleness & Behavioral Deep-Dive

PM Onsite Behavioral and Product Critique Prompts You are a Product Manager candidate in an onsite interview. Respond concisely in two to three minute...

Behavioral & LeadershipProduct Design & ImprovementOwnership & Execution
12
0
204 people solved
Jul 4, 2025
Apple logo
Apple
Medium
Software Engineer

Implement DFS for connected components

Given an undirected graph with n nodes (1 ≤ n ≤ 200, 000) and an edge list, implement depth-first search to compute (a) the number of connected compon...

Coding & AlgorithmsGraphs
14
0
92 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Product Manager

PM behavioral: a difficult project you owned, how you recovered and what you learned

Tell me about a project that turned into a real struggle for you. What made it hard, how did you handle it, and what did you take away from it? `hint ...

Behavioral & LeadershipFailure & LearningOwnership & Execution
0
0
5 people solved
Feb 19, 2026
Zipline logo
Zipline
Medium
Software Engineer

Compute Maximum Area Under Adjacent Bars

You are given an array heights of n non-negative integers. Each value represents the height of a vertical bar of width 1, and the bars are placed next...

Coding & Algorithms
5
1
42 people solved
Jan 25, 2026
ByteDance logo
ByteDance
Hard
Data Scientist

Interpret and validate regression with interactions

Modeling 7-day Retention with LPM and Logistic Regression Context You have user-level data with a binary outcome retained_7d (1 if the user is active ...

Statistics & Math
5
0
77 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist

Model comment counts and detect anomalies

Modeling Heavy-Tailed Comment Counts and Robust Monitoring You are analyzing daily comment counts at the post–day level. The distribution is heavy-tai...

Statistics & Math
6
0
56 people solved
Oct 13, 2025
Google logo
Google
Medium
Product Manager

Real-Time Google Maps Photos — New Product Ideation

Product Design: Real-Time Street-Level Imagery in Google Maps Assume Google Maps can refresh street-level imagery in near real time across selected co...

Product / Decision Making
12
1
93 people solved
Jul 4, 2025
Amazon logo
Amazon
Hard
Data Scientist

Prioritize a new warehouse proposal with data

Build vs. Lease vs. Defer: New Fulfillment Center Decision Context You are evaluating whether to open a new fulfillment center (FC) to improve deliver...

Analytics & ExperimentationBusiness Case AnalysisCausal Inference
5
0
95 people solved
Oct 13, 2025
LinkedIn logo
LinkedIn
Medium
Software Engineer

Analyze time and space complexity

Analyze time and space complexity For any algorithm you implement, analyze its time and space complexity using Big-O notation. Derive and justify the ...

Coding & Algorithms
11
0
119 people solved
Jul 31, 2025
Motive logo
Motive
Medium
Software Engineer

Implement Union-Find and track components

Implement a Disjoint Set Union (Union-Find) data structure with union by rank and path compression. Design the API to support union(a, b), connected(a...

Coding & Algorithms
9
0
79 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Software Engineer

Design a nearby places (proximity) service

Design a proximity search service like Yelp/Google Maps. Requirements: - Store places with (place_id, name, lat/lng, category, rating). - Query: “find...

System Design
7
0
57 people solved
Feb 25, 2026
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