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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
GoogleBloombergCapgeminiAmazon

Also asked at Capgemini, Amazon

Easy
Software Engineer

Reverse Degree of a Lowercase String

Problem For a lowercase English string s, define its reverse degree by assigning each letter its position in the reversed alphabet: `text a -> 26, b -...

Coding & AlgorithmsArrays & Strings
0
0
10 people solved
Shopify logo
Shopify
Easy
Machine Learning Engineer

Design a robot movement command system

Robot Movement (Pair Programming) You are given an empty starter repository (only a README). Implement a small, testable robot movement module that ca...

Coding & AlgorithmsSimulation & State MachinesLow-Level Design (OOP)
91
0
813 people solved
Dec 15, 2025
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Design a Resilient Bootstrap API Aggregator

Design a bootstrap endpoint that accepts userId. Make the API or object boundaries explicit, then cover invariants, edge cases, testing strategy, and ...

Software Engineering FundamentalsAPI DesignConcurrency
30
0
212 people solved
Aug 3, 2026
Citadel logo
Citadel
Medium
Software Engineer

Compute max team size with a core interval

You are given n employees’ working-time intervals, where employee i works during the inclusive interval [startTime[i], endTime[i]]. You want to form a...

Coding & AlgorithmsIntervals & SchedulingMath & Number Theory
28
0
361 people solved
Dec 25, 2025
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Debug a transformer training pipeline

Debug a Transformer training pipeline You are handed a PyTorch Transformer encoder–decoder training pipeline that misbehaves. The pipeline includes to...

Machine LearningML CodingNeural Networks & Training
79
0
1384 people solved
Jul 31, 2025
Airbnb logo
Airbnb
Medium
Software Engineer Locked

Design a Multi-Level In-Memory Cloud Storage Service

Design staged in-memory cloud storage with prefix ranking, user capacity, merging, and conflict-aware backup and restore while surfacing unspecified s...

Software Engineering Fundamentals
11
0
78 people solved
Aug 25, 2026
Affirm logo
Affirm
Medium
Software Engineer Locked

Aggregate loans and match repayments

This question evaluates the ability to aggregate transactional loan records and match repayment transactions to outstanding loans, testing competencie...

Coding & AlgorithmsArrays & StringsSimulation & State Machines
18
1
236 people solved
Mar 7, 2026
Fireworks Ai logo
Fireworks Ai
Medium
Software Engineer Locked

Find global GPU idle intervals

This question evaluates competency in interval reasoning, managing overlapping time ranges across distributed resources, designing online data structu...

Coding & AlgorithmsIntervals & SchedulingData Structure Design
32
0
454 people solved
Jan 6, 2026
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
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
TikTok logo
TikTok
Medium
Product Manager

Designing Metrics and Experiments to Evaluate a TikTok For You Ranking Change

TikTok changes the recommendation algorithm behind its feed frequently. How would you measure the impact of an algorithm update on user engagement? Ex...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
1
0
10 people solved
Aug 14, 2026
Meta logo
Meta
Medium
Product Manager

Keeping Privacy-Violating and Other Harmful Ads Off Meta's Apps

Meta's apps, including Facebook, Instagram and Messenger, show ads from a very large number of advertisers. As a product manager at Meta, how would yo...

Product Design & StrategyTrust & SafetyMetrics & KPIs
0
0
7 people solved
Sep 8, 2026
Uber logo
Uber
Medium
Software EngineerSenior+ Locked

Quadtree for 2D Geospatial Points

This question evaluates the ability to design a spatial data structure, specifically a point quadtree, for storing and querying two-dimensional coordi...

Coding & Algorithms
3
0
49 people solved
Jun 28, 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
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
NVIDIA logo
NVIDIA
Easy
Software Engineer

Implement encode/decode for list of strings

You are given a list of strings (may include digits and symbols). Implement two methods: - encode(List<String> input) -> String: converts the list int...

Coding & AlgorithmsParsing & InterpretersArrays & Strings
11
0
189 people solved
Feb 11, 2026
Deshaw logo
Deshaw
Medium
Software Engineer Locked

Compare Linux Containers and Virtual Machines

Compare Linux containers and virtual machines through kernels, isolation, resource controls, compatibility, security tradeoffs, and combined deploymen...

Software Engineering FundamentalsContainers & OrchestrationOperating Systems
5
1
68 people solved
Aug 25, 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
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
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
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