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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
Amazon logo
Amazon
Medium
Software EngineerSenior+ Locked

Design a Scalable Metrics Monitoring System

Design a scalable monitoring platform for metric ingestion, time-series storage, dashboards, ad hoc queries, and alert evaluation. Explore series iden...

System DesignObservabilitySystem Design Fundamentals
13
0
205 people solved
Jul 23, 2026
ByteDance logo
ByteDance
Hard
Machine Learning EngineerNew Grad

Implement a Transformer Decoder from Scratch Without Starter Code

With no starter code, no skeleton and no other scaffolding, implement a transformer decoder from scratch in about 30 minutes. Write it in Python with ...

Machine LearningTransformers & AttentionML Coding
1
0
14 people solved
Aug 20, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer Locked

Streaming Entropy with Numerical Stability

This question tests a candidate's ability to implement numerically stable online algorithms for computing Shannon entropy over streaming data. It eval...

Coding & Algorithms
16
0
173 people solved
Jun 3, 2026
OpenAI logo
OpenAI
Medium
Machine Learning Engineer

Design an Agent Harness and Evaluation System

Design an Agent Harness and Evaluation System Design a harness and evaluation platform for a tool-using AI agent. The agent receives a user task, may ...

ML System DesignLLM EvaluationAI Agents
26
0
293 people solved
Apr 19, 2026
Voleon logo
Voleon
Hard
Software Engineer

Implement Kac ring with O(1) color and kstep

You are implementing a Kac ring dynamical system. Model - There are N positions arranged in a circle, indexed clockwise: 0, 1, ..., N-1. - Each positi...

Coding & AlgorithmsData Structure DesignMath & Number Theory
91
0
811 people solved
Sep 24, 2025
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
Medium
Software Engineer Locked

Render Wrapped Paragraphs Inside One Text Box

Render paragraphs with independent word-wrapping widths inside one ASCII box, preserving word order while padding every line to the largest requested ...

Coding & Algorithms
8
0
87 people solved
Aug 1, 2026
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
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
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Spreading Contagion on a Grid

This question tests graph traversal and multi-source BFS on a 2D grid, evaluating a candidate's ability to model simultaneous state propagation across...

Coding & Algorithms
17
0
155 people solved
Jun 8, 2026
Google logo
Google
Medium
Software Engineer

Check if all substrings are dictionary words

You are given a string s (letters only) and access to an English dictionary dict (a set of valid words). Return true if every contiguous substring of ...

Coding & AlgorithmsString Algorithms
51
0
483 people solved
Mar 11, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+ Locked

Implement a Min-Priority Queue Without a Library Heap

Implement a min-priority queue without a library heap. Support duplicate integers, push, peek, pop, and size operations efficiently while returning de...

Coding & AlgorithmsHeaps & Priority QueuesData Structure Design
13
0
193 people solved
Aug 22, 2026
LinkedIn logo
LinkedIn
Medium
Software EngineerSenior+ Locked

Merge Keyed N-Ary Trees

Merge two keyed N-ary trees into a fresh result while preserving the required child order and matching nodes only within the same parent. Account for ...

Coding & AlgorithmsTrees
26
0
283 people solved
Jun 11, 2026
Google logo
Google
Medium
Software Engineer Locked

Expand Recursive Key-Value Placeholders in a Template

Expand %KEY% placeholders in a template, recursively resolving placeholders inside mapped values. Use memoized dependency traversal to preserve litera...

Coding & AlgorithmsGraphsParsing & Interpreters
13
0
191 people solved
Aug 4, 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
Databricks logo
Databricks
Medium
Software EngineerSenior+ Locked

Add Sliding-Window Get and Put Activity Metrics to a Key-Value Store

Extend an in-memory key-value store with averageGet(window) and averagePut(window) activity metrics for sliding windows of one hour, one day, and one ...

Software Engineering FundamentalsTwo Pointers & Sliding WindowKey-Value Stores
16
0
124 people solved
Jul 30, 2026
Luma logo
Luma
Medium
Software Engineer

Build a Scalable Text-to-Speech Service Prototype, Then Defend and Extend It

This prompt is one of five offered in a take-home for a software engineering role on an AI product team. The candidate picks one prompt; across the se...

System DesignSystem Design FundamentalsAPI Design
1
0
9 people solved
Sep 17, 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
Amazon logo
Amazon
Medium
Software EngineerNew Grad

Spreadsheet Formulas with Dependency Updates

Spreadsheet Formulas with Dependency Updates Implement spreadsheet_get_results(row_count: int, column_count: int, operations: list[list[str]]) -> list...

Coding & Algorithms
8
1
65 people solved
Aug 20, 2026
Google logo
Google
Medium
Software Engineer

Resolve Product Disagreement and Balance Technical Debt

Answer the following questions about collaboration and engineering judgment. Use real experience where possible, and make your own role and reasoning ...

Behavioral & LeadershipConflict & CollaborationCode Quality & Maintainability
4
0
46 people solved
Aug 29, 2026
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