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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
Amazon logo
Amazon
Medium
Software EngineerIntern

Control Robot Charging with Repeated Polling and Exclusive Station Assignments

A fleet contains multiple robots and a limited number of charging stations. A robot whose battery level is below 50% should be sent to an available ch...

Software Engineering FundamentalsSimulation & State MachinesAPI Integration & HTTP Clients
1
0
19 people solved
Jan 10, 2026
Google logo
Google
Medium
Data ScientistSenior+

Implement Fibonacci with efficiency constraints

Write a function fib(n) that returns the nth Fibonacci number (0-indexed: fib(0)=0, fib(1)=1). Requirements: - Handle n up to at least 10^6. - Discuss...

Coding & Algorithms
12
2
107 people solved
Nov 24, 2025
Netflix logo
Netflix
Medium
Software Engineer Locked

Design playlist with add/remove/shuffle

This question evaluates data structure design and algorithmic complexity skills, focusing on managing dynamic sets, uniform random selection, and aver...

Coding & AlgorithmsData Structure Design
37
0
263 people solved
Jan 22, 2026
Atlassian logo
Atlassian
Medium
Machine Learning Engineer

Compute moving average over last N stream

You are given an integer N and an unbounded stream of integers arriving one by one. After each new integer arrives, output the average of the last N i...

Coding & Algorithms
4
0
75 people solved
Nov 21, 2025
Stripe logo
Stripe
Medium
Data Scientist

Design an idempotent SQL ETL for late data

You own the daily_user_metrics fact table. Build an idempotent, rerunnable ETL that can be triggered for any date D and correctly handles duplicates, ...

Data Manipulation (SQL/Python)
9
0
66 people solved
Oct 13, 2025
Shopify logo
Shopify
Medium
Machine Learning Engineer AI Locked

Implement a Capacity-Bounded Cache

This question evaluates a candidate's ability to design and implement an efficient capacity-bounded in-memory key-value cache, assessing understanding...

Coding & AlgorithmsData Structure DesignCaching
9
0
105 people solved
Feb 3, 2026
Netflix logo
Netflix
Easy
Software Engineer

Design a crash-resilient file system

Prompt Design a resilient file system that can recover file contents correctly after a system crash (e.g., power loss / kernel panic). The interviewer...

System DesignOperating Systems
17
0
347 people solved
Dec 16, 2025
Amazon logo
Amazon
Hard
Software EngineerSenior+ Locked

Explain BIOS and UEFI Firmware Mechanisms

Explain key BIOS and UEFI mechanisms, including system-management interrupts, hardware fault reporting, early memory initialization, and ACPI table di...

Software Engineering FundamentalsOperating SystemsMemory Management
9
0
107 people solved
Jul 15, 2026
Amazon logo
Amazon
Medium
Software Engineer

Minimize Points Used Across Multiple Reward Programs

Problem A customer has several reward programs. Program i has at most balance[i] points, and each point is worth value[i] integer microdollars. Given ...

Coding & Algorithms
2
0
30 people solved
May 1, 2026
Nextdoor logo
Nextdoor
Medium
Software Engineer

Design a Scalable Job Scheduler

Design a job scheduler for a small startup, then explain how you would evolve it to support roughly 100x more scheduled tasks. The system should: - Al...

System DesignJob Scheduling & WorkflowsDistributed Transactions & Idempotency
29
1
265 people solved
Mar 16, 2026
Stripe logo
Stripe
Medium
Software Engineer

Implement a multi-step form in React

Build a Multi‑Step Form Component in React Context You are implementing a multi‑step web form in React. The form gathers user data over several steps ...

Software Engineering FundamentalsReact & UI FrameworksState Management
25
0
188 people solved
Sep 6, 2025
Hex logo
Hex
Medium
Software Engineer Locked

Design an In-Flight Entertainment Experience for a Small Screen

Design an accessible in-flight entertainment experience for a very small touch screen. Prioritize flight information and music while accounting for tu...

System Design
5
0
38 people solved
Jul 15, 2026
Goldman Sachs logo
Goldman Sachs
Medium
Software Engineer

Find first non-repeating character index

You are given two separate coding tasks. Task 1: First Unique Character Given a string s (lowercase/ASCII letters), return the index of the first char...

Coding & AlgorithmsArrays & Strings
8
0
133 people solved
Dec 15, 2025
CloudKitchens logo
CloudKitchens
Medium
Software Engineer

Design real-time kitchen order fulfillment system

Backend Engineering Challenge: Real-time order fulfillment Design and implement (conceptually) a single-process, real-time backend system for fulfilli...

System DesignData Structure DesignConcurrency
23
0
430 people solved
Feb 11, 2026
Netflix logo
Netflix
Medium
Data ScientistIntern

Compute ITT, TOT, and LATE with noncompliance

In the same personalization experiment, not everyone assigned to treatment actually receives personalization (noncompliance). You are given user-level...

Analytics & ExperimentationCausal Inference
26
0
196 people solved
Mar 5, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a ChatGPT-like web chat UI

This English summary evaluates a question that assesses front-end–focused system design competencies such as UI architecture, real-time streaming inte...

System DesignSystem Design FundamentalsReact & UI Frameworks
39
0
302 people solved
Jan 2, 2026
Roblox logo
Roblox
Medium
Software Engineer

Detect shuffle-mode sequence

Question Given a playlist of distinct songs and two player modes—Random (each next song chosen independently and uniformly at random, with replacement...

Coding & Algorithms
120
0
289 people solved
Jul 29, 2025
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
8
0
134 people solved
Feb 11, 2026
Capital One logo
Capital One
Medium
Software Engineer Locked

Design a geography-aware virtual card service

This question evaluates a candidate's ability to design secure, low-latency, geography-aware payment systems, covering distributed systems architectur...

System DesignPayments & Ledgers
72
0
552 people solved
Feb 12, 2026
Virtu Financial logo
Virtu Financial
Hard
Quantitative Researcher Locked

Maximum Edges in a Triangle-Free Graph

Find the maximum number of edges possible in a triangle-free graph on n vertices. Practice extremal graph reasoning, a tight bipartite construction, a...

Coding & Algorithms
2
0
27 people solved
Aug 21, 2026
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