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Master your tech interviews with 18,000+ real questions from top companies.

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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
Google logo
GoogleMicrosoftBloomberg

Also asked at Bloomberg, Amazon, PhonePe

Medium
Software Engineer

Compare Strings Under Swaps and Global Renaming

Problem Two operations may be applied repeatedly to either lowercase string: swap any two positions, or choose two letters already present and exchang...

Coding & AlgorithmsArrays & StringsSorting
1
0
10 people solved
Instacart logo
Instacart
Medium
Software Engineer Locked

Design a Grocery-Ordering Backend with Reliable Inventory Reservations

Design store-level inventory, reservations, concurrent checkout, idempotent order transitions, and reconciliation for a simplified grocery backend.

System DesignSystem Design FundamentalsTransactions & Isolation
5
0
50 people solved
Sep 11, 2026
Oracle logo
Oracle
Medium
Software Engineer Locked

Troubleshoot a Frontend Failure in a Client-Server Application

Debug a frontend failure across browser assets, network requests, backend traces, response contracts, caching, and deployment-specific user cohorts.

Software Engineering FundamentalsDebuggingAPI Integration & HTTP Clients
3
0
45 people solved
Sep 11, 2026
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Design a Distributed Rate-Limiting Service

Design a distributed rate limiter for per-user, per-tenant, route, and global API policies under a tight latency budget. Make accuracy and availabilit...

System DesignRate LimitingConsistency & Availability
10
0
204 people solved
Jul 2, 2026
Databricks logo
Databricks
Hard
Software EngineerSenior+ Locked

Present a Technical Project Under Active Follow-Up

Present one technical project while responding to detailed follow-up questions without losing the larger system narrative. This behavioral deep dive e...

Behavioral & Leadership
10
0
89 people solved
May 10, 2026
Amazon logo
Amazon
Medium
Software EngineerNew Grad

Solve Three Algorithm Variants

You are given three independent coding problems. For each one, describe and implement an efficient solution. 1. Generate queue arrangements - You a...

Coding & Algorithms
8
0
104 people solved
Apr 10, 2026
Uber logo
Uber
Medium
Product Manager

How a PM Decides When to Pay Down Tech Debt Versus Ship New Features

How do you decide between spending engineering time on paying down tech debt and spending it on shipping new products or features? Walk through how yo...

Product / Decision MakingPrioritization & TradeoffsTechnical Tradeoffs for PMs
0
0
6 people solved
Aug 4, 2026
Palo Alto Networks logo
Palo Alto Networks
Easy
Software Engineer

Design a device configuration system

Design a system for about 1,000 admin users to manage configurations for about 1,000 devices. Admins need to update device configuration every day. Ex...

System Design
9
1
152 people solved
Jan 30, 2026
Anthropic logo
Anthropic
Medium
Machine Learning Engineer Locked

Convert Samples into Event Intervals

This question evaluates understanding of array and sequence processing, run-length encoding concepts, and interval representation for time-ordered tra...

Coding & AlgorithmsArrays & Strings
25
0
160 people solved
Apr 7, 2026
Airbnb logo
Airbnb
Medium
Data Scientist Locked

Describe How You Use SQL in Data Science Work

Prepare to explain how you use SQL in day-to-day data science work, from defining analysis populations and joining data to building experiment or coho...

Data Manipulation (SQL/Python)SQLData Quality & Validation
8
0
89 people solved
Jul 8, 2026
Axon logo
Axon
Hard
Software Engineer

Design an airline booking system

System Design: Airline Booking System Design an airline booking platform that lets travelers search for flights, book them, select seats, and modify o...

System DesignDistributed Transactions & IdempotencySystem Design Fundamentals
123
0
1062 people solved
Aug 7, 2025
Microsoft logo
Microsoft
Medium
Software EngineerSenior+

Minimum Moves on a Grid with k-Cell Jumps

You are given an m x n grid. Each cell is either open or blocked: - grid[i][j] = 0 means the cell is open. - grid[i][j] = 1 means the cell is blocked....

Coding & Algorithms
11
0
205 people solved
Jun 11, 2026
Waymo logo
Waymo
Easy
Data Scientist

Compare two rare-event detection models statistically

You are evaluating two models (Model A and Model B) for rare-event detection (e.g., fraud, abuse, medical adverse event). Positives are extremely rare...

Machine LearningHypothesis TestingModel Evaluation
81
1
727 people solved
Jan 17, 2026
Jane Street logo
Jane Street
Medium
Quantitative Trader

Sealed-Bid Auction for a Box of 200 Coin Flips (and an Informed Opponent)

You are one of two bidders in a sealed-bid auction for a box. The box's payout is determined by flipping 200 fair coins: it pays \$1 for every coin th...

Machine LearningProbabilityPuzzles & Brainteasers
29
0
279 people solved
Oct 10, 2025
Pinterest logo
Pinterest
Medium
Data ScientistSenior+ Locked

Estimate a Launch Impact with Difference in Differences

Estimate a regional product launch effect with difference in differences when retrospective randomization is unavailable. Define the estimand, test pa...

Analytics & ExperimentationCausal InferenceRegression & Statistical Modeling
19
1
181 people solved
Jun 14, 2026
Tower logo
Tower
Hard
Data Scientist Locked

Debug Oscillating GPU Utilization During Training

A distributed neural-network training job shows GPU utilization repeatedly swinging from about 90% down to 20%. Connect data and model choices to serv...

ML System Design
8
0
58 people solved
Jul 26, 2026
Jane Street logo
Jane Street
Medium
Software Engineer

Use Excel formulas to compute haircuts

You are given an Excel worksheet with columns such as Asset, Market Value, and Haircut %. Using only cell references (no copy-paste of numeric values)...

Data Manipulation (SQL/Python)
22
0
207 people solved
Sep 6, 2025
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Design a production RAG system

Question Design a production retrieval-augmented generation (RAG) system for enterprise document QA. Walk through the end-to-end architecture and just...

ML System DesignRetrieval-Augmented GenerationEmbeddings & Vector Search
58
0
560 people solved
Aug 11, 2025
xAI logo
xAI
Hard
Software Engineer

Answer technical-challenge and motivation questions

Answer the following behavioral interview questions: 1) Describe the most technically challenging problem you have solved. What made it hard, what did...

Behavioral & LeadershipProject Deep DiveMotivation & Fit
15
0
169 people solved
Feb 7, 2026
Glean logo
Glean
Easy
Data Scientist

Compute DAU and rolling MAU with zero days

You have two tables in PostgreSQL: Tables users - user_id (STRING / INT, PK) - signup_date (DATE) logins - user_id (STRING / INT, FK → users.user_id) ...

Data Manipulation (SQL/Python)Metrics & KPIsSQL
11
0
135 people solved
Nov 10, 2025
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