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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
Tesla logo
Tesla
Medium
Machine Learning Engineer

Implement automatic braking logic in Python

Using Python, implement a simple automatic braking function. Given current speed v (m/s), distance to obstacle d (m), maximum deceleration a_max (m/s^...

Coding & Algorithms
6
0
114 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Data Scientist

Propose an ads recommendation model for shop ads

You need to propose a modeling approach for recommending/ranking shop ads (i.e., which shop ads to show and in what order) for a marketplace app. Desc...

Machine Learning
7
0
59 people solved
Oct 14, 2025
TikTok logo
TikTok
Medium
Software Engineer

Reconstruct a tree from two traversals

Reconstruct a tree from two traversals Given two arrays representing the preorder and inorder traversals of a binary tree with unique values, reconstr...

Coding & Algorithms
8
0
78 people solved
Jul 15, 2025
Meta logo
Meta
Medium
Software Engineer

Design an online chess platform

Design an online chess platform. Requirements: - User matchmaking (ranked/unranked). - Real-time gameplay with low latency moves. - Enforce game rules...

System DesignMultiplayer Game SystemsSystem Design Fundamentals
8
0
73 people solved
Feb 25, 2026
Meta logo
Meta
Medium
Data Scientist

Analyze Group Call Adoption Using SQL Queries

CALL_LOGS | call_id | user_id | call_start | call_end | is_group_call | participant_cnt | | 101 | 12 | 2023-08-01 10:00...

Data Manipulation (SQL/Python)
156
1
270 people solved
Jul 12, 2025
Elsevier logo
Elsevier
Easy
Data Scientist

Write Unit Tests for a Given Python Class, Covering Normal and Edge Cases

A data scientist interview includes a short coding and testing exercise: you are given the implementation of a small Python class and asked to write t...

Software Engineering FundamentalsTesting & Quality
0
0
3 people solved
Jul 14, 2026
LinkedIn logo
LinkedIn
Medium
Software Engineer Locked

Explain a Project with a Diagram and Deep Dive into Your Design

Communicate a project through a simple data-flow diagram, then explain design choices, implementation ownership, failure behavior, and validation.

Software Engineering FundamentalsProject Deep DiveCommunication & Stakeholders
5
0
38 people solved
Sep 17, 2026
Apple logo
Apple
Medium
Software Engineer Locked

Multiply Two Sparse Matrices

Multiply two sparse integer matrices without performing work for known zero contributions. Preprocess nonzero rows, join compatible inner indices, acc...

Coding & Algorithms
8
0
61 people solved
May 14, 2026
Capital One logo
Capital One
Medium
Data Scientist

Refactor code and enforce robustness

Code Review and Refactor: Summing a CSV Column Context You are reviewing a short Python script that sums a numeric column from a CSV using pandas. You...

Coding & AlgorithmsCode Quality & MaintainabilityPandas & Python Data
10
0
163 people solved
Oct 13, 2025
Salesforce logo
Salesforce
Medium
Software Engineer

Help a Colleague Resolve a Difficult Problem

Prompt Tell me about a time you helped a colleague resolve a difficult problem. Explain how you learned what they needed, how you contributed without ...

Behavioral & Leadership
1
0
22 people solved
Apr 11, 2026
Hightouch logo
Hightouch
Medium
Product Manager

PM behavioral: an insight others missed that changed a business result

Describe an insight you reached that other people had missed, and how acting on it changed a business result. `hint Explain why it was hidden Intervie...

Behavioral & LeadershipAmbiguity & Decision MakingLeadership & Influence
0
0
6 people solved
Feb 21, 2026
Atlassian logo
Atlassian
Medium
Machine Learning Engineer Locked

Compute moving and weighted averages from a stream

This question evaluates a candidate's understanding of streaming algorithms, sliding-window statistics, and resource-constrained data structure design...

Coding & Algorithms
7
0
76 people solved
Oct 15, 2025
Google logo
Google
Medium
Software Engineer

Handling Conflict with a Coworker and with a Manager When You Were Wrong

Two related behavioral prompts about conflict were reported from a Google software engineering interview loop at the mid level. Answer each one with a...

Behavioral & LeadershipConflict & CollaborationFailure & Learning
0
0
10 people solved
Mar 4, 2026
Voleon logo
Voleon
Easy
Data Scientist

Solve Markov, OLS-rotation, and coin-toss probability

Answer the following three interview questions. 1) Basic properties of a Markov (transition) matrix Let \(P\) be a transition matrix of a (time-homoge...

Statistics & MathProbabilityRegression & Statistical Modeling
80
0
713 people solved
Oct 6, 2025
Revolut logo
Revolut
Medium
Product Manager

Launch In-Person Cash Deposits for Revolut Top-Ups, Then Diagnose a Falling KPI

You are a product manager on Revolut's top-up team, the team responsible for the ways customers add money to their accounts. Answer two questions: how...

Product Design & StrategyRequirements & Launch ExecutionMetric Diagnostics
1
0
12 people solved
Oct 17, 2025
Lyft logo
Lyft
Medium
Machine Learning EngineerIntern

Design an HR Document AI Platform

Design an internal AI platform for a bank's HR organization. The platform should ingest HR documents such as policies, benefits guides, onboarding man...

ML System DesignRetrieval-Augmented GenerationAuthentication & Authorization
18
0
125 people solved
Mar 12, 2026
Affirm logo
Affirm
Medium
Software Engineer Locked

Design an A/B testing platform

This question evaluates the ability to design an end-to-end A/B testing platform, assessing competencies in distributed systems architecture, data mod...

System DesignExperiment Design (A/B Testing)Experiment Analysis & Readout
30
0
271 people solved
Mar 7, 2026
Boston Consulting Group logo
Boston Consulting Group
Medium
Data Scientist

Compute posterior and predictive coin probabilities

Bayesian coin: posterior, prediction, and stopping-time expectation Context - You have two coins and will use the same coin for all flips: - Fair co...

Statistics & MathBayesian StatisticsProbability
20
0
148 people solved
Oct 13, 2025
Zipline logo
Zipline
Medium
Software Engineer

Design a Redundant Railroad Crossing

Design a safe and redundant control system for an at-grade railroad crossing used by road vehicles and pedestrians. The system should detect approachi...

System Design
7
0
72 people solved
Jan 25, 2026
Samsung logo
Samsung
Medium
Machine Learning Engineer

Maximize sum of non-adjacent values

Problem You are given an integer array nums representing the amount of money available at each house along a street. If you take money from house i, y...

Coding & Algorithms
7
0
71 people solved
Mar 1, 2026
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