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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
Amazon logo
Amazon
Medium
Software Engineer

Fewest Moves for a Chess Piece With Type-Specific Step Directions to Capture the King

A board game is played on a rectangular grid. Your piece starts on one square and wins by capturing the opposing king, which it does by moving onto th...

Coding & AlgorithmsGraphsGrids & Matrices
7
1
80 people solved
Oct 1, 2026
Coreweave logo
Coreweave
Medium
Software Engineer

Justify Building an In-House System Instead of Adopting an Existing Solution

In the hiring manager round, you describe a past project in which your team built its own system. The manager pushes back: the industry already has so...

Behavioral & LeadershipAmbiguity & Decision MakingProject Deep Dive
4
0
35 people solved
Sep 29, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a Text-to-Video Generation Service: GPU Scheduling, Failures, Traffic Bursts

Design the backend of a text-to-video generation service where each clip occupies GPUs for minutes: schedule jobs onto GPU workers, recover long-runni...

System DesignGPU InfrastructureFault Tolerance & Failover
5
0
68 people solved
Sep 20, 2026
Jane Street logo
Jane Street
Medium
Software Engineer

Implement Connect Four with bottom push-up

Implement a Connect Four variant with bottom push-up. In standard Connect Four a dropped disc falls to the lowest empty cell of a column. In this vari...

Coding & AlgorithmsSimulation & State MachinesData Structure Design
229
1
2646 people solved
Sep 6, 2025
Waymo logo
Waymo
Medium
Software Engineer Locked

Sort a String's Characters by a Given Character Order

Rearrange the characters of a target string so they follow the order given by a second string, placing characters not in that order at the end in thei...

Coding & AlgorithmsSortingArrays & Strings
21
1
151 people solved
Sep 10, 2026
Charta Health logo
Charta Health
Medium
Software Engineer Locked

Design a Prefix-Suggestion Search Interface

Design a prefix-search interface over a title file, with clear matching rules, efficient lookup, accessible suggestions, and protection from stale res...

Software Engineering FundamentalsSearch & Feed SystemsState Management
6
0
96 people solved
Sep 9, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Data Scientist Locked

Compare Mean and Median for a Distribution with a Point Mass

Compare mean and median estimation for a point-mass and normal mixture using MAE simulation, finite-sample formulas, and error probabilities at sample...

Statistics & MathSampling & EstimationProbability
13
0
165 people solved
Sep 9, 2026
Nextdoor logo
Nextdoor
Medium
Software EngineerSenior+ Locked

Design In-Memory Transactions with Snapshots and Savepoints

Design in-memory transactions and savepoints with snapshots, undo logs, correct deletion recovery, commit boundaries, and explicit time and storage co...

Software Engineering FundamentalsTransactions & IsolationDatabase Internals
10
0
170 people solved
Sep 9, 2026
Google logo
GoogleMetaAmazon

Also asked at Amazon, Bloomberg, Microsoft, Apple, Whatnot

Easy
Software Engineer

Find the Earliest Failing Version

Find the Earliest Failing Version Versions are numbered from 1 through n. There is a first failing version: every earlier version passes, and that ver...

Coding & AlgorithmsBinary Search
1
0
19 people solved
Databricks logo
Databricks
Medium
Software EngineerIntern

Design Tic-Tac-Toe and QPS data structures

You are given two independent coding problems that focus on data structure and API design. --- Problem 1: Generalized Tic-Tac-Toe Game with Simple AI ...

Coding & AlgorithmsData Structure DesignSimulation & State Machines
123
2
878 people solved
Nov 13, 2025
Amazon logo
AmazonMicrosoftGoogle

Also asked at Google, Bloomberg, Zoho, Meta, Coupang, Infosys, Walmart Labs, Oracle, Deshaw, Atlassian, Instacart

Hard
Software Engineer

Match a Whole String with Wildcards

Problem Return whether the pattern mask matches the whole string text under these wildcard rules: - A lowercase letter in mask matches the same letter...

Coding & AlgorithmsString AlgorithmsDynamic Programming
1
0
14 people solved
Apple logo
AppleTeradataAmazon

Also asked at Amazon, Google, Microsoft, Bloomberg

Hard
Software Engineer

Hire an Exactly Sized Group with Proportional Pay

Problem Worker i has positive quality[i] and minimum acceptable wage[i]. Hire exactly k workers, paying every selected worker one shared rate times th...

Coding & AlgorithmsGreedyHeaps & Priority Queues
0
0
17 people solved
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Design a Resilient Chat System

Design a resilient direct and group chat system by tracing each message through persistence, fan-out, delivery, and offline replay. Evaluate ordering,...

System DesignReal-Time SystemsMessaging & Event-Driven
42
0
629 people solved
Jul 11, 2026
Quora logo
Quora
Easy
Software EngineerNew Grad

Zigzag diagonal walk through a matrix from a chosen left-column start

Walk through a matrix along its diagonals in a zigzag. The walk only ever moves in two directions, up-right and down-left; when the next step would le...

Coding & AlgorithmsGrids & MatricesSimulation & State Machines
0
0
4 people solved
Nov 5, 2026
Physical Intelligence logo
Physical Intelligence
Hard
Software Engineer Locked

Hand-Write a Bounded Cache for a Database-Backed Backend Service

Implement a hand-written, bounded cache in front of a database-backed backend service, including how reads fill it and how writes and deletes invalida...

Software Engineering FundamentalsCachingData Structure Design
10
0
70 people solved
Sep 8, 2026
Unity logo
Unity
Medium
Software Engineer

Design a Feature Store for Offline Training and Low-Latency Online Serving

Design a feature store that supports both offline machine learning training workflows and online low-latency serving. It must handle high-volume event...

ML System DesignML Data Pipelines & Feature StoresBatch & Stream Processing
4
0
45 people solved
Oct 9, 2026
LinkedIn logo
LinkedIn
Medium
Machine Learning Engineer

Sort the values of a quadratic function applied to a sorted array in linear time

You are given an integer array nums sorted in non-decreasing order and three integers a, b and c that define the function f(x) = a x^2 + b x + c. Ap...

Coding & AlgorithmsTwo Pointers & Sliding Window
3
0
49 people solved
Aug 31, 2026
Amazon logo
Amazon
Hard
Business Intelligence Engineer

Design a One-Page Warehouse Inbound Dashboard

Design a One-Page Warehouse Inbound Dashboard An operational vice president needs a one-page dashboard for warehouse inbound operations to decide how ...

Analytics & ExperimentationBI & Reporting SystemsMetrics & KPIs
7
0
73 people solved
Sep 9, 2026
Amazon logo
AmazonGoogleUber

Also asked at Uber, Cisco, Snowflake, Microsoft, TikTok, Meta, Two Sigma, DoorDash, Snapchat, Zoom, Bloomberg

Hard
Software Engineer

Find Dictionary Words in a Letter Board

Find Dictionary Words in a Letter Board Given a rectangular lowercase-letter board and a list of distinct words, return every listed word that can be ...

Coding & AlgorithmsBacktracking & RecursionGrids & Matrices
1
0
11 people solved
Apple logo
AppleGoogleAmazon

Also asked at Amazon, Meta, Microsoft, Bloomberg, Visa, Salesforce, DoorDash, ByteDance, TikTok, SpaceXAI, Infosys, TCS, Morgan Stanley, Walmart Labs, Cisco

Medium
Software Engineer

Length of a Longest Shared Subsequence

Problem Return the maximum length of a sequence appearing in both text1 and text2 after deleting zero or more characters without reordering those left...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
4
0
30 people solved
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