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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
Uber logo
Uber
Medium
Machine Learning Engineer

Count connected delivery zones

Given an m x n grid representing a service area, each cell is either 'Z' (deliverable zone) or '#' (blocked). Two 'Z' cells belong to the same zone if...

Coding & AlgorithmsGrids & Matrices
8
0
122 people solved
Sep 6, 2025
Dropbox logo
Dropbox
Medium
Product Manager

Estimate Dropbox's Addressable Revenue Among Small and Mid-Sized Businesses

Estimate the size of the small and medium-sized business market for Dropbox. `hint Define the unit, then the buyer Settle whether the answer is in bus...

Product / Decision MakingEstimation & Market Sizing
0
0
5 people solved
Nov 24, 2024
Amazon logo
Amazon
Hard
Software Engineer Locked

Find Longest Activatable Server Streak

This question evaluates array algorithm skills, specifically recognition of sliding-window or two-pointer techniques and reasoning about time and spac...

Coding & Algorithms
5
0
60 people solved
Apr 15, 2026
Point72 logo
Point72
Medium
Quantitative Researcher

Choose and Explain a Classical Hypothesis Test

Choose and Explain a Classical Hypothesis Test Explain null and alternative hypotheses, significance level, p-value, Type I error, and Type II error. ...

Statistics & Math
6
0
57 people solved
Dec 14, 2025
Uber logo
Uber
Medium
Product Manager

Handling an Engineering Manager's New Feature Push When You Have Zero Spare Capacity

You are a product manager. Your engineering manager wants the team to work on a new feature, but you have no bandwidth at all to take it on. How would...

Behavioral & LeadershipPrioritization & TradeoffsConflict & Collaboration
1
0
10 people solved
Jan 18, 2025
Uber logo
Uber
Medium
Software Engineer

Find Kth Smallest in BST

You are given the root of a binary search tree and an integer k. Return the value of the node that would appear in the kth position if all node values...

Coding & Algorithms
4
0
68 people solved
Feb 25, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Implement a Tic-Tac-Toe game class

Problem Implement a class that supports playing an n × n Tic-Tac-Toe game. Requirements Create a class TicTacToe(n) with: - move(row, col, player) -> ...

Coding & AlgorithmsData Structure DesignSimulation & State Machines
10
0
107 people solved
Oct 14, 2025
Amazon logo
Amazon
Medium
Software EngineerSenior+ Locked

Design a Threshold-Based Database Partition Rebalancer

Design a threshold-based database partition rebalancer that splits oversized key ranges and safely merges eligible adjacent ranges. The exercise cover...

Software Engineering FundamentalsStorage & ShardingDistributed Transactions & Idempotency
11
0
79 people solved
Jul 23, 2026
Meta logo
Meta
Medium
Data Scientist

Calculate Ad Insertion Statistics for Two Methods

Ad Insertion Statistics for Two Feed Strategies You are comparing two ways of inserting ads into a 100-post feed. - Option A: Each post independently ...

Statistics & MathProbability
75
0
107 people solved
Jul 12, 2025
Voleon logo
Voleon
Medium
Data Scientist

Analyze time-zoned events with pandas

You are given two pandas DataFrames. events columns: user_id:int, ts:str ISO-8601 with timezone (e.g., '2025-08-31T23:58:43-07:00'), event:str in {'si...

Data Manipulation (SQL/Python)Pandas & Python DataData Cleaning & Wrangling
22
0
355 people solved
Oct 13, 2025
Visa logo
Visa
Medium
Product Manager

Agile Fundamentals for Product Managers: Core Values, Principles and Team Practices

You are interviewing for a product manager role. Explain what the Agile approach to building software is and walk through its key principles. `hint Se...

Software Engineering FundamentalsRoadmapping & PlanningRequirements & Launch Execution
0
0
10 people solved
Mar 31, 2025
Google logo
Google
Hard
Machine Learning Engineer

Describe conflict and failure using STAR framework

You are in a behavioral interview for a software/ML engineering role. The interviewer asks you to: 1. Describe a time you faced a significant conflict...

Behavioral & LeadershipConflict & CollaborationFailure & Learning
17
0
209 people solved
Dec 8, 2025
NVIDIA logo
NVIDIA
Hard
Data Scientist

Design and explain robust web APIs for ML inference

Design an HTTP API for Image-Based Model Predictions Context: Design an HTTP REST API that serves predictions for image inputs (e.g., classification, ...

Coding & Algorithms
4
0
85 people solved
Oct 13, 2025
Snapchat logo
Snapchat
Hard
Software Engineer Locked

Explain Swift memory, value semantics, and GCD

This question evaluates a candidate's understanding of Swift memory management, value versus reference semantics, copy-on-write behavior, ARC stack vs...

Software Engineering Fundamentals
5
0
73 people solved
Jan 2, 2026
OneMain Financial logo
OneMain Financial
Hard
Data Scientist

Present a project to non-technical leaders

10–15 Minute Modeling Project Presentation (Mixed Stakeholders) Task Prepare a 10–15 minute presentation of a past modeling project for a mixed audien...

Behavioral & LeadershipCommunication & StakeholdersProject Deep Dive
8
0
99 people solved
Oct 13, 2025
Google logo
Google
Medium
Product Manager

Learning from Failure & Conflict

Google Product Manager Behavioral Screen: Failure, Conflict, and Mission Fit You are in an early behavioral interview for a Product Manager role. Answ...

Behavioral & LeadershipFailure & LearningMotivation & Fit
28
0
465 people solved
Jul 4, 2025
Twitch logo
Twitch
Medium
Product Manager

Lifetime wedding-guest count per person in the US: a Fermi estimate

Estimate how many weddings the average person in the US attends over their lifetime. `hint Two angles Build the estimate from one quantity you can san...

Product / Decision MakingEstimation & Market Sizing
0
0
6 people solved
Dec 17, 2024
Bank of America logo
Bank of America
Medium
Data ScientistIntern

Analyze a current event's market impact

World Event → Market Impact → Quant Modeling You are interviewing for a Data Scientist role on a quantitative team at a global bank. Choose one curren...

Analytics & Experimentation
8
0
70 people solved
Aug 11, 2025
Google logo
Google
Medium
Product Manager

Design an MVP That Fills Hair Salons' Idle Off-Peak Chair Time

Hair salons are often packed during a few busy stretches and then sit almost empty for the rest of the day. Design a minimum viable product that helps...

Product Design & StrategyProduct SenseOperations & Capacity
0
0
6 people solved
May 13, 2026
Meta logo
Meta
Medium
Product Manager

Design a Cheese-Picking Helper for Shoppers Overwhelmed at the Grocery Store

Design an app that helps people feel less anxious when deciding which cheese to buy at a grocery store. Explain which shoppers you would build it for,...

Product Design & StrategyProduct SenseMetrics & KPIs
0
0
6 people solved
Apr 13, 2026
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