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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
Intuit logo
Intuit
Medium
Product Manager

Choosing Between Retrieval-Augmented Generation and Fine-Tuning for an LLM Product

Explain when you would ground a large language model with retrieval-augmented generation (RAG) and when you would fine-tune it instead, and why. `hint...

Machine LearningAI Product ManagementFine-Tuning & Alignment Techniques
0
0
8 people solved
Sep 10, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Refactor a Chatbot into Clean Object-Oriented Components

Prepare for a OpenAI software engineering interview question about refactor a chatbot into clean object-oriented components. The prompt highlights pra...

Software Engineering FundamentalsCode Quality & MaintainabilityLow-Level Design (OOP)
18
0
186 people solved
Jun 22, 2026
Temporal logo
Temporal
Medium
Software Engineer Locked

Design a One-to-One Chat System

This question evaluates a candidate's ability to design scalable, real-time backend architectures for one-to-one messaging, covering competencies in d...

System DesignReal-Time SystemsMessaging & Event-Driven
10
0
125 people solved
Apr 3, 2026
Robinhood logo
Robinhood
Medium
Software Engineer

Produce a Deterministic Course Plan

Produce a Deterministic Course Plan There are num_courses courses numbered 0 through num_courses - 1. Each prerequisite pair is [course, prerequisite]...

Coding & AlgorithmsGraphs
17
0
186 people solved
Apr 21, 2026
Tradedesk logo
Tradedesk
Medium
Frontend Engineer Locked

Object-Oriented Design of an Elevator Control System

An object-oriented design question asking the candidate to model an elevator control system: its classes, their responsibilities, and how a button pre...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines
2
0
24 people solved
Sep 15, 2026
Wayfair logo
Wayfair
Medium
Product Manager

Wayfair: Finding Hidden B2B Buyers, Spotting Designers and Choosing Outreach Targets

Wayfair sells home furnishings both to consumers and to business buyers, but many businesses shop through ordinary accounts, so there is no simple way...

Analytics & ExperimentationSegmentation & Cohort AnalysisExperiment Analysis & Readout
0
0
11 people solved
Aug 17, 2026
Coinbase logo
Coinbase
Medium
Backend EngineerSenior+ Locked

Design a Real-Time Asset Price Service

Design a near-real-time digital asset price service that evolves from one upstream provider to several. Cover normalized ingestion, source reconciliat...

System DesignReal-Time SystemsSystem Design Fundamentals
19
0
134 people solved
Jun 12, 2026
Snowflake logo
Snowflake
Hard
Software Engineer Locked

Design a Reliable Job Scheduler

Design a fault-tolerant scheduler for one-time and recurring jobs that must run near specified times. Candidates reason about durable schedules and at...

System Design
9
1
142 people solved
Jun 9, 2026
Legora logo
Legora
Medium
Software Engineer Locked

Present a Technically Challenging Project

Prepare a concise engineering project review that can withstand a detailed technical deep dive. Frame the problem, constraints, architecture, personal...

Behavioral & Leadership
8
0
110 people solved
Jun 22, 2026
OpenAI logo
OpenAI
Medium
Machine Learning Engineer Locked

Simulate Plant Infection Spread

This question evaluates graph traversal and grid-based simulation skills, including modeling a 2D grid as a graph, propagation dynamics with obstacles...

Coding & AlgorithmsGrids & MatricesGraphs
13
0
180 people solved
Apr 3, 2026
Snowflake logo
Snowflake
Hard
Software Engineer Locked

Design a Thread-Safe Multi-Rule Rate Limiter

Design a rate limiter that evolves from one rule to multiple concurrent rules, reversible permits, and deferred work. Make admission and ordering sema...

Software Engineering FundamentalsRate LimitingConcurrency
13
0
104 people solved
Jun 20, 2026
Chariot logo
Chariot
Medium
Software Engineer

Explore an HTTP Maze

You are given an HTTP API that represents a maze-like forest. The entrance is available at GET /mirkwood. Each location in the forest is identified by...

Coding & Algorithms
9
0
115 people solved
Apr 7, 2026
Palo Alto Networks logo
Palo Alto Networks
Medium
Software Engineer

Find Maximum Rectangle in Bar Chart

Given an array heights of n non-negative integers, where each value represents the height of a vertical bar in a bar chart and every bar has width 1, ...

Coding & Algorithms
6
0
78 people solved
Feb 20, 2026
Meta logo
Meta
Medium
Data Scientist

How should you evaluate unconnected content?

A social media platform has launched a feed feature that increases the share of unconnected content, meaning posts from creators who do not have an ex...

Analytics & ExperimentationExperiment Analysis & ReadoutMetrics & KPIs
18
1
184 people solved
Apr 5, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design Restart Strategy for Oracle Solver

This question evaluates understanding of probabilistic runtime analysis and restart strategies for randomized (Las Vegas-style) solvers, including exp...

Machine LearningProbability
15
0
123 people solved
Jan 13, 2026
Amazon logo
AmazonBloombergMeta

Also asked at Meta, Microsoft, Google, Uber, Snowflake

Medium
Software Engineer

Link Neighbors across Missing Binary-Tree Children

Problem For an arbitrary binary tree, set each node's next pointer to the node immediately to its right on the same level. Set the last next pointer o...

Coding & AlgorithmsTrees
1
0
10 people solved
Hudson River Trading logo
Hudson River Trading
Medium
Software Engineer Locked

Return the K Smallest Integers

Return the k smallest integers from an unsorted list in ascending order while preserving duplicates. Compare full sorting, a size-k max-heap, quicksel...

Coding & Algorithms
11
0
93 people solved
May 15, 2026
Google logo
GoogleMicrosoftAmazonBloomberg

Also asked at Amazon, Bloomberg

Hard
Software Engineer

Longest Equal-Character Run After Each Update

Problem You are given a lowercase string s and a sequence of updates. Update i replaces the character at zero-based index queryIndices[i] with queryCh...

Coding & AlgorithmsTreesData Structure Design
0
0
9 people solved
Deshaw logo
Deshaw
Medium
Software Engineer

Remove the Fewest Units to Equalize Nonempty Bags

Problem Each positive entry of beans gives the number of beans in one bag. You may remove any number from each bag, including removing all of them, bu...

Coding & AlgorithmsSortingGreedy
0
0
10 people solved
Coinbase logo
Coinbase
Medium
Software Engineer Locked

Schedule Fixed-Order Tasks with a Cooldown

Find the minimum calendar days needed to execute tasks in their fixed input order when repeated task IDs require a specified number of complete cooldo...

Coding & Algorithms
13
0
117 people solved
May 12, 2026
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