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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.0k
Companies
570
Updated
10.05.2026
12.0k 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
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Schedule One-GPU and Eight-GPU Model Jobs

Design a fair eight-GPU scheduler for one-GPU and gang-scheduled eight-GPU jobs, with drain reservations, atomic allocation, and starvation prevention...

ML System Design
11
0
136 people solved
Aug 12, 2026
Snowflake logo
Snowflake
Medium
Software Engineer Locked

Query Unique and Most-Frequent Keys in a Recent Event Window

Process a timestamp-ordered event stream while retaining only its most recent m arrivals. Answer historical-cutoff queries for distinct-key count and ...

Coding & AlgorithmsData Structure DesignStacks & Queues
18
0
145 people solved
Aug 3, 2026
Amazon logo
Amazon
Medium
Software Engineer

Finding the Root Cause of an Intermittent Failure When the Obvious Metrics Look Healthy

Tell me about a time when a system was failing intermittently, and the very obvious metrics were all looking good. How did you find the root cause, an...

Behavioral & LeadershipDebuggingObservability
0
0
8 people solved
Sep 10, 2026
Instacart logo
Instacart
Hard
Software Engineer Locked

Library Catalog and Lending System: Five-Phase Engineering Assessment

Practice a five-phase library catalog and lending assessment that combines requirements clarification, coding-assistant implementation, manual metrics...

Software Engineering Fundamentals
7
0
61 people solved
Aug 3, 2026
Databricks logo
Databricks
Medium
Software EngineerSenior+ Locked

Design Chat Deletion Semantics Under Concurrent Sends

Design deletion semantics for a chat backend when message sends and thread deletion race across servers. Define the visible consistency contract, line...

System DesignConsistency & AvailabilityReal-Time Systems
51
1
468 people solved
Jul 14, 2026
Airbnb logo
Airbnb
Easy
Software Engineer Locked

Design an In-Memory Cloud Storage Service with Users, Backups, and Restore

Design an in-memory cloud storage service with globally named files, user quotas, largest-file queries, account merges, and per-user backup and restor...

Software Engineering Fundamentals
7
0
73 people solved
Aug 17, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Determine Whether Package Weights Can Be Safely Arranged

Decide whether package weights from zero through nine can be reordered so every adjacent sum stays below ten, including repeated values and separator ...

Coding & AlgorithmsGreedy
15
0
185 people solved
Aug 19, 2026
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
36
0
539 people solved
Jul 11, 2026
Qualified Health logo
Qualified Health
Hard
Software Engineer

Stream LLM Output While Committing Reliable DAG Results

A workflow runs an LLM task whose output must appear incrementally in an interactive client. Downstream DAG nodes, however, require the complete struc...

System DesignReal-Time SystemsJob Scheduling & Workflows
0
0
5 people solved
Sep 30, 2026
Optiver logo
Optiver
Medium
Software Engineer Locked

Maintain Price Levels For A Single-Symbol Order Book

Review a single-symbol order book implementation prompt with insert, modify, cancel, and price-level lookup callbacks. The interview topic focuses on ...

Coding & AlgorithmsData Structure DesignTrading Systems
126
6
1218 people solved
Jun 26, 2026
Okta logo
Okta
Medium
Backend EngineerSenior+

Repair an Express Authentication Endpoint Without Blocking the Event Loop

Review and repair a Node.js Express /authenticate endpoint. It accepts a username and password, queries a database for the user, compares the supplied...

Software Engineering FundamentalsAuthentication & AuthorizationApplication Security
0
0
3 people solved
Oct 5, 2026
Confluent logo
Confluent
Medium
Software Engineer

Design an RSS News Feed Service

Design an RSS news feed service. The service lets users subscribe to RSS sources, ingests articles from those sources on a schedule, stores article me...

System DesignSearch & Feed SystemsAPI Design
29
0
392 people solved
Apr 29, 2026
Wayfair logo
Wayfair
Medium
Applied Scientist

Simulate and Compare Multi-Armed Bandit Strategies

Build a small simulation that compares common multi-armed bandit strategies. Explain each strategy, record reward and regret, and use the experiment t...

Machine LearningSequential & Adaptive TestingProbability
1
0
15 people solved
Sep 10, 2026
Google logo
Google
Easy
Software Engineer Locked

Count Rectangle Coverage on a Grid

Apply many inclusive rectangular increments to a square grid and return the final coverage count for every cell. The exercise emphasizes upper-bound e...

Coding & AlgorithmsGrids & Matrices
70
3
564 people solved
Jul 21, 2026
Snowflake logo
Snowflake
Medium
Software Engineer Locked

Resolve Inherited Allow and Deny Permissions in a DAG

Resolve each node's permission in an inheritance DAG where any reachable deny overrides an allow and nodes without an inherited decision are denied by...

Coding & AlgorithmsGraphsAuthentication & Authorization
11
0
156 people solved
Aug 15, 2026
Google logo
Google
Medium
Software EngineerSenior+ Locked

Compute a Depth-Weighted Sum of a Nested List

Compute the depth-weighted sum of integers in an unevenly nested list. Compare recursive and iterative traversals while handling empty lists, negative...

Coding & AlgorithmsParsing & InterpretersMath & Number Theory
48
4
585 people solved
Aug 6, 2026
LinkedIn logo
LinkedIn
Easy
Software Engineer

Answer Repeated Shortest Word Distance Queries

Answer Repeated Shortest Word Distance Queries You are given a fixed array words and many queries. Each query contains two distinct words that both ap...

Coding & Algorithms
6
0
73 people solved
Aug 19, 2026
DoorDash logo
DoorDash
Hard
Software Engineer Locked

Explain an AI-Assisted Project

Build an interview answer about an AI-assisted project that covers evaluation, guardrails, ownership, and limits instead of hype.

Behavioral & Leadership
3
0
56 people solved
Sep 1, 2026
Mercor logo
Mercor
Medium
Software Engineer

Project Deep Dive With Product-Level Probing, AI Tool Use, and Startup Motivation

You are interviewing for a software engineer role at a startup. One round is a background conversation rather than a coding exercise. After a short se...

Behavioral & LeadershipProject Deep DiveMotivation & Fit
7
0
70 people solved
May 1, 2026
Goldman Sachs logo
Goldman Sachs
Easy
Data ScientistIntern Locked

Infer BA When AB Is the Identity

Analyze what AB = I implies about BA for both same-size square matrices and compatible rectangular matrices, including the projection case.

Statistics & Math
3
0
57 people solved
Sep 2, 2026
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