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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Netflix logo
Netflix
Hard
Software Engineer

Design demand-side ads relational tables

You are designing the core relational data model for a demand-side advertising system. Create a normalized schema (tables + key columns + relationship...

Software Engineering FundamentalsSystem Design Fundamentals
45
0
368 people solved
Mar 9, 2026
Robinhood logo
Robinhood
Medium
Software Engineer

Design a secure trading app on AWS

Scenario Design a secure, Robinhood-like mobile/web application on AWS, with a deep dive into: 1. User profile management (account creation, authentic...

System DesignSystem Design FundamentalsAuthentication & Authorization
21
0
263 people solved
Oct 21, 2025
Capital One logo
Capital One
Medium
Data Engineer

Explain production model drop to a PM

Role Play: Communicate Model Degradation to a Non-Technical PM You are a data scientist. A PM says: > “Your model performed great on the validation se...

Behavioral & LeadershipModel Monitoring & DriftCommunication & Stakeholders
10
0
100 people solved
Mar 1, 2026
Airbnb logo
Airbnb
Medium
Software Engineer

Simulate pouring water onto a 1D terrain

You are given a 1D terrain represented by an integer array heights, where heights[i] is the height of the column at index i. Part 1 — Render terrain W...

Coding & AlgorithmsSimulation & State Machines
46
0
332 people solved
Oct 28, 2025
OpenAI logo
OpenAI
Medium
Data Scientist

Write SQL to compute signup and retention lift

You are analyzing an A/B test for a marketing campaign that offers a free 1‑month trial. Assume all timestamps are in UTC. Tables experiment_assignmen...

Data Manipulation (SQL/Python)SQLExperiment Analysis & Readout
22
0
189 people solved
Oct 8, 2025
Garner Health logo
Garner Health
Medium
Software EngineerSenior+ Locked

Design a Concurrent Appointment Booking System

Design a concurrent appointment service for searching provider availability, booking, cancellation, and rescheduling. Prevent double booking under rac...

System Design
4
0
34 people solved
May 24, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Design a high-level logging system

Design a high-level centralized logging system for a company. Assume many services (microservices, batch jobs) running across multiple hosts/container...

System DesignObservabilityData Ingestion & CDC
8
0
142 people solved
Feb 9, 2026
Snowflake logo
Snowflake
Medium
Frontend Engineer Locked

Explain React classes, lifecycle, and hooks

This question evaluates understanding of React class and function components, lifecycle phases, Hooks (including state and effect handling), code reus...

Software Engineering Fundamentals
6
0
89 people solved
Jan 11, 2026
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Account Balance with Expiring Grants

This question evaluates the ability to design a data structure that tracks time-limited credit grants, prioritizing expiration order during spending a...

Coding & Algorithms
4
0
62 people solved
Jun 23, 2026
Oracle logo
Oracle
Medium
Software Engineer Locked

Maximum Subarray Sum with a Length Cap

Compute the maximum sum of a nonempty contiguous subarray whose length cannot exceed a given cap. The prompt fixes negative-only behavior, integer-wid...

Coding & Algorithms
6
0
68 people solved
Sep 5, 2026
Fetch Rewards logo
Fetch Rewards
Medium
Data Scientist

Compute a Seven-Day Rolling Average

You are analyzing daily product metrics for the Fetch mobile app. Table daily_metric_values | Column | Type | Description | |---|---:|---| | metric_da...

Data Manipulation (SQL/Python)
6
1
49 people solved
Apr 27, 2026
xAI logo
xAI
Medium
Software Engineer Locked

Implement a parallelized sort

This question evaluates understanding of parallel algorithms, shared-memory concurrency primitives, synchronization, workload partitioning, and perfor...

Coding & Algorithms
9
0
66 people solved
Jan 22, 2026
Square logo
Square
Medium
Software EngineerSenior+

Build a Trust-Aware BIN Database

Build a Trust-Aware BIN Database Implement process_bin_operations(operations) for an in-memory database of card-number prefixes. A prefix identifies a...

Coding & Algorithms
2
0
36 people solved
Apr 27, 2026
Capital One logo
Capital One
Medium
Machine Learning Engineer

Return all root-to-leaf tree paths

Given the root of a binary tree, return all root-to-leaf paths. - A leaf is a node with no children. - A path should be represented as a string with n...

Coding & AlgorithmsTreesBacktracking & Recursion
16
0
123 people solved
Dec 15, 2025
Grammarly logo
Grammarly
Medium
Software Engineer

Design a Read-Once Chat System

Design a chat messaging system where one sender can select multiple recipients at send time, but the message is not a group chat message. Instead, the...

System DesignReal-Time SystemsMessaging & Event-Driven
35
0
277 people solved
Apr 6, 2026
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Design short-video retrieval with sparse text

You are designing the candidate-generation (retrieval) and recommendation system for a short-video app. Constraints and setting: - Users can search wi...

ML System Design
13
0
101 people solved
Feb 3, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Design LLM search handling long token inputs

Design an LLM-powered search and question-answering system over a large corpus of documents such as internal wikis, PDFs, logs, contracts, and web pag...

ML System DesignRetrieval-Augmented GenerationLLM Applications
24
0
241 people solved
Apr 6, 2025
Oscar logo
Oscar
Medium
Software Engineer

Design Telehealth Consultation Queue

Design a web-based queuing application for a health-insurance company that offers free 24/7 telehealth access to its members through a website and mob...

System Design
5
0
72 people solved
Apr 15, 2026
Parafin logo
Parafin
Hard
Software Engineer

Design loan application system

Design an End-to-End Loan Application Platform You are a software engineer at a small lending startup. Design a scalable, compliant loan origination s...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
76
0
546 people solved
Aug 4, 2025
Roblox logo
Roblox
Medium
Data Scientist

How to estimate a feature’s causal impact on time spent

You work on a Roblox-like game platform. A new product change ("feature") is rolled out and you want to estimate its causal impact on user engagement,...

Analytics & ExperimentationCausal InferenceRegression & Statistical Modeling
13
0
237 people solved
Jan 13, 2026
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