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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
Databricks logo
Databricks
Hard
Software Engineer Locked

Design Snapshot Set Iteration and Clarify Durable Writes

Design a mutable set whose iterators preserve an exact, deterministic creation-time snapshot, then frame the missing requirements for a separate durab...

Software Engineering FundamentalsData Structure DesignSystem Design Fundamentals
31
0
317 people solved
Jul 26, 2026
Qualified Health logo
Qualified Health
Hard
Software Engineer

Enforce Tenant and Session Isolation in an Agent RAG System

A multi-tenant Agent/RAG service stores many users' document vectors in shared infrastructure and answers questions using retrieved content and option...

System DesignAuthentication & AuthorizationAI Safety & Alignment
0
0
7 people solved
Sep 8, 2026
Da Vinci Trading logo
Da Vinci Trading
Hard
Software Engineer

Design an in-memory order matching engine

You are asked to design an in-memory order book / order matching system for a single electronic trading venue. The implementation language is C++, and...

System DesignTrading SystemsConcurrency
140
0
992 people solved
Dec 8, 2025
Oracle logo
Oracle
Medium
Software EngineerSenior+ Locked

Maximize Movie Ratings Without Skipping Two in a Row

Choose a maximum-sum subsequence of positive or negative movie ratings while ensuring no two consecutive positions are skipped. At least one movie mus...

Coding & Algorithms
3
0
63 people solved
Aug 21, 2026
Goldman Sachs logo
Goldman Sachs
Medium
Software Engineer

Rolling Ball Maze Reachability

Rolling Ball Maze Reachability Implement has_rolling_path(maze: list[list[int]], start: list[int], destination: list[int]) -> bool. The maze is a rect...

Coding & Algorithms
2
0
30 people solved
Aug 15, 2026
Harvey logo
Harvey
Hard
Software Engineer Locked

Design Retrieval-Augmented Answers from a Document Vault

Design a document-vault question-answering service that returns grounded responses with citations while preserving tenant and document permissions. Co...

ML System DesignRetrieval-Augmented GenerationLLM Applications
26
2
255 people solved
Jul 27, 2026
Cursor logo
Cursor
Medium
Software Engineer

Design a Durable Cron Job Scheduler

Design a durable cron job scheduler that runs recurring jobs according to a schedule. Explain schedule interpretation, dispatch, worker execution, rec...

System DesignJob Scheduling & WorkflowsDistributed Coordination
5
0
42 people solved
Apr 7, 2026
Google logo
Google
Medium
Software EngineerNew Grad Locked

Search a Pattern Across the Leaf Text of a Binary Tree

Search for a pattern across the left-to-right concatenation of binary-tree leaf strings, including matches that cross leaf boundaries. This algorithm ...

Coding & AlgorithmsString AlgorithmsTrees
25
1
210 people solved
Jun 17, 2026
Ethos logo
Ethos
Medium
Software Engineer

Find Array Elements Uniquely Determined by Known Range Sums

An integer array A of length n is hidden from you; its positions are numbered 1 to n. You are given a list of ranges (L, R), and the sum A[L] + A[L+1]...

Coding & AlgorithmsGraphsArrays & Strings
1
0
12 people solved
Aug 21, 2026
Confluent logo
Confluent
Medium
Software EngineerSenior+

Search Words and Phrases in a Large Line-Oriented File

Search Words and Phrases in a Large Line-Oriented File A text file contains one sentence per line and may be much larger than memory. Design an API th...

Software Engineering Fundamentals
9
0
128 people solved
Jan 1, 2026
LinkedIn logo
LinkedIn
Medium
DevOps EngineerSenior+ Locked

Find the Nearest Supply Location in a Road Network

Return the minimum number of roads from a named landing location to any supply location in a large undirected, unweighted network. Handle supplies at ...

Coding & Algorithms
8
1
72 people solved
Aug 1, 2026
Stripe logo
Stripe
Medium
Software Engineer

Plan bicycle routes on a city map

You are given a city bicycle network as a weighted graph where edges encode distance, bike-lane availability, elevation gain, and traffic risk. Comput...

Coding & AlgorithmsGraphs
53
0
604 people solved
Sep 6, 2025
Decagon logo
Decagon
Medium
Software Engineer AI Locked

Design an AI Gateway

This question evaluates system design competencies for a multi-tenant AI gateway, including architectural design, unified API and authentication patte...

System DesignLLM ApplicationsAPI Design
69
0
477 people solved
Feb 17, 2026
Citadel logo
Citadel
Medium
Software EngineerIntern

Implement task queue with insert, delete, execute

Problem: Task manager with insert/delete/execute-next Design a data structure to manage executable tasks. Each task has: - taskId (unique) - priority ...

Coding & AlgorithmsHeaps & Priority Queues
65
0
466 people solved
Feb 11, 2026
TikTok logo
TikTok
Hard
Software Engineer

Remove the Fewest Overlapping Intervals

Remove the Fewest Overlapping Intervals You are given an array of intervals intervals, where each interval is [start, end] with start < end. Return th...

Coding & Algorithms
4
0
34 people solved
Aug 20, 2026
Jane Street logo
Jane Street
Hard
Machine Learning Engineer

Build a time-series forecasting model

Build a time-series forecasting model Forecast the Next H Steps for Time Series Context You are given one or more time series with timestamps and nume...

Machine LearningTime Series & Forecasting
70
0
854 people solved
Aug 1, 2025
Discord logo
Discord
Medium
Software EngineerSenior+ Locked

Design a Local Leader Election System

This question evaluates distributed systems skills—specifically leader election, failure detection, state propagation, and the ability to design and i...

System DesignDistributed CoordinationFault Tolerance & Failover
16
1
290 people solved
May 16, 2026
Meta logo
Meta
Easy
Data Scientist

How to evaluate a similar-listing notifications feature

Question You are a Data Scientist on a US C2C marketplace app (like Facebook Marketplace) where users buy and sell second-hand products. Current produ...

Analytics & ExperimentationLaunch EvaluationMetrics & KPIs
120
1
1026 people solved
Jan 17, 2026
Robinhood logo
Robinhood
Medium
Backend Engineer

Critique a Recent Engineering Project and Explain What You Would Redo

Critique a Recent Engineering Project and Explain What You Would Redo Choose a meaningful engineering project from roughly the last two years. Give a ...

Behavioral & Leadership
10
0
87 people solved
Jul 17, 2026
Datadog logo
Datadog
Medium
Software Engineer Locked

Implement DeleteTree With Limited Filesystem APIs

Review a filesystem implementation problem that asks you to delete an entire tree using only limited list, delete, and directory-check APIs. The quest...

Software Engineering FundamentalsTreesMemory Management
19
0
173 people solved
Jun 11, 2026
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