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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Waymo logo
Waymo
Medium
Software Engineer Locked

Design a Real-Time Player Matchmaking Service

Design a real-time player matchmaking service with join, cancel, expiration, compatibility matching, and notification flows. Define safe request state...

System DesignMultiplayer Game SystemsDistributed Coordination
7
0
67 people solved
May 13, 2026
Axon logo
Axon
Medium
Software Engineer

Design a Test Orchestration System

Design a test orchestration service for an engineering organization. The service should let users define different kinds of tests, schedule when they ...

System DesignJob Scheduling & WorkflowsSystem Design Fundamentals
18
0
142 people solved
Nov 18, 2025
Amazon logo
Amazon
Medium
Software Engineer

Maximize protected population with one-step guard shifts

There are n cities in a line (1-indexed). You are given: - population[1..n]: population of each city - unit: a binary string of length n, where unit[i...

Coding & AlgorithmsGreedyArrays & Strings
31
0
214 people solved
Jan 27, 2026
Meta logo
Meta
Medium
Software EngineerSenior+ Locked

Solve Tree Diameter and Palindromic Counts

This two-problem prompt evaluates proficiency in tree algorithms and recursion for computing longest paths in binary trees, along with string processi...

Coding & Algorithms
4
0
34 people solved
May 21, 2026
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
0
0
15 people solved
Apr 11, 2026
Apple logo
Apple
Medium
Data Scientist

Build leak-safe sklearn model with calibration

You must build an end‑to‑end scikit‑learn pipeline to predict churn_28d at decision time t0 using only features available at or before t0 (no leakage)...

Machine LearningSupervised LearningFeature Engineering
10
0
131 people solved
Oct 13, 2025
OpenAI logo
OpenAI
Medium
Software Engineer

Merge overlapping time intervals efficiently

Given a list of closed intervals [start, end] with 0 <= start <= end, merge all intervals that overlap or touch and return a minimal set of non-overla...

Coding & AlgorithmsIntervals & Scheduling
19
1
262 people solved
Jul 31, 2025
Ramp logo
Ramp
Hard
Software Engineer

What Project Are You Proudest Of?

Tell me about the project you are most proud of. Why does it stand out, what was your specific contribution, what challenges did you face, and what me...

Behavioral & LeadershipProject Deep Dive
29
0
216 people solved
Jan 17, 2026
Robinhood logo
Robinhood
Medium
Software Engineer Locked

Compute dependency load factors in a DAG

This question evaluates understanding of graph theory and algorithms, specifically reachability and dependency analysis in a directed acyclic graph, a...

Coding & AlgorithmsGraphs
12
1
236 people solved
Feb 12, 2026
Airbnb logo
Airbnb
Medium
Software Engineer

Find palindrome-forming string pairs

Given an array of distinct lowercase strings words, return all index pairs (i, j) with i != j such that the concatenation words[i] + words[j] is a pal...

Coding & AlgorithmsString AlgorithmsArrays & Strings
16
0
116 people solved
Jul 31, 2025
Coupang logo
Coupang
Medium
Software Engineer

Compute minimal flips connecting two islands

Given an n x n binary grid of 0s (water) and 1s (land) containing exactly two disjoint islands (cells with 1 connected 4-directionally), return the mi...

Coding & AlgorithmsGrids & Matrices
14
0
124 people solved
Sep 6, 2025
Instacart logo
Instacart
Medium
Software Engineer

Solve expression evaluator and string decoder

1) Implement an arithmetic expression evaluator that reads expressions from a text file (one expression per line) and outputs the evaluated result for...

Coding & AlgorithmsParsing & InterpretersStacks & Queues
36
0
283 people solved
Sep 6, 2025
Voleon logo
Voleon
Medium
Data Scientist

Explain P-Value Reporting and Bootstrap for Coefficient Estimation

Explain P-Value Reporting and Bootstrap for Coefficient Estimation Scenario Technical screen — statistical inference checks after regression. Question...

Statistics & MathHypothesis TestingSampling & Estimation
41
0
292 people solved
Aug 4, 2025
Confluent logo
Confluent
Medium
Software Engineer

Solve constrained monster traversal

Solve constrained monster traversal You are given a directed graph with n rooms labeled 0..n-1; each room i contains a monster with health hp[i] ≥ 0. ...

Coding & AlgorithmsGraphsBacktracking & Recursion
11
0
184 people solved
Jul 27, 2025
Qube Research & Technologies logo
Qube Research & Technologies
Hard
Software Engineer Locked

Compute expected days until no whole pills

This question evaluates understanding of probability and expected value, modeling of state-based stochastic processes (Markov chains), and the ability...

Coding & Algorithms
7
0
74 people solved
Jan 15, 2026
Apple logo
Apple
Hard
Software EngineerNew Grad Locked

Design a smartwatch sensor subsystem

This question evaluates system-level engineering skills for designing a smartwatch sensing subsystem, including sensor selection, trade-offs among acc...

System DesignDebugging
25
1
213 people solved
Feb 25, 2026
Reddit logo
Reddit
Medium
Software Engineer Locked

Merge Message Context Windows

This question evaluates a candidate's skill in designing efficient algorithms and appropriate data-structure use for merging overlapping message conte...

Coding & AlgorithmsIntervals & Scheduling
30
1
249 people solved
Jan 23, 2026
Datadog logo
Datadog
Medium
Software Engineer

Implement write with internal buffer

Implement a buffered writer over an expensive sink API. You are given a function writeToDevice(byte[] chunk) that may accept at most M bytes per call ...

Coding & Algorithms
5
0
81 people solved
Sep 6, 2025
Meta logo
Meta
Hard
Machine Learning Engineer

Design a scalable MoE pretraining pipeline

Design a Large-Scale MoE Pretraining Pipeline (Bilingual LLM, 1T Tokens, 256×A100-80GB) Context You are designing a pretraining pipeline for a decoder...

ML System DesignTransformers & AttentionNeural Networks & Training
27
0
210 people solved
Sep 6, 2025
Asana logo
Asana
Medium
Software Engineer

Design a Collaborative Todo List

Design a collaborative todo-list service — think shared lists where teammates add, edit, assign, reorder, and complete items, and see each other's cha...

System DesignReal-Time SystemsConsistency & Availability
72
0
507 people solved
Apr 2, 2026
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