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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
Molocoads logo
Molocoads
Medium
Machine Learning Engineer Locked

Find the Longest Consecutive Run of Ones

Find the longest contiguous run of ones in a binary array under an explicit no-flips assumption. The prompt fixes empty-input behavior, a portable sca...

Coding & Algorithms
0
0
19 people solved
Aug 26, 2026
Vanta logo
Vanta
Easy
Software Engineer Locked

Implement a Unique Lines Command

This question evaluates mastery of file I/O, streaming algorithms, stateful line processing, and memory-efficient handling of large inputs, situating ...

Coding & Algorithms
12
1
112 people solved
May 25, 2026
J.P. Morgan logo
J.P. Morgan
Medium
Software Engineer II Locked

Reason About Concurrency, CAP Trade-Offs, and Kubernetes Scaling

Explain concurrency versus parallelism, make operation-level CAP choices during partitions, and design Kubernetes scaling that accounts for readiness,...

Software Engineering Fundamentals
2
0
18 people solved
Aug 8, 2026
Citadel logo
Citadel
Medium
Site Reliability Engineer

Solve Five Core Python Data-Processing Exercises

Solve Five Core Python Data-Processing Exercises Implement and explain: repeat a message n times with blank lines; square a list then reverse it; Fizz...

Software Engineering Fundamentals
6
0
41 people solved
May 8, 2026
Anthropic logo
Anthropic
Hard
Software Engineer Locked

Design stack with O(1) minimum query

This question evaluates understanding of stack-based data structures, constant-time operation constraints, and handling edge cases such as empty queri...

Coding & AlgorithmsData Structure DesignStacks & Queues
64
0
487 people solved
Feb 1, 2026
Apple logo
Apple
Medium
Software Engineer

Design a Service for the Top K Most-Visited URLs over a Sliding Time Window

Design a system that reports the top K most-visited URLs over a recent time window. Every page visit or link click produces an event that names the UR...

System DesignReal-Time SystemsBatch & Stream Processing
0
0
4 people solved
Aug 31, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Debug a driver assignment bug

Given a service that selects the best delivery driver ("dasher") for an order, users report incorrect assignments. With a provided codebase and failin...

Coding & AlgorithmsDebuggingTesting & Quality
53
0
413 people solved
Aug 13, 2025
OpenAI logo
OpenAI
Medium
Software Engineer

Design in-memory database API

Design an In-Memory Database: Insert, Query, and Indexing Design and implement a minimal, single-process, in-memory database intended to be embedded i...

System DesignDatabase InternalsIndexing & Query Performance
67
0
795 people solved
Jul 29, 2025
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
119
0
288 people solved
Jul 29, 2025
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)
80
0
712 people solved
Dec 15, 2025
Databricks logo
Databricks
Medium
Software Engineer Locked

Design a Slack-Like Messaging System

This question evaluates a candidate's ability to architect a real-time team messaging platform, testing competencies in distributed systems, data mode...

System DesignReal-Time SystemsMessaging & Event-Driven
54
0
476 people solved
May 14, 2026
Oracle logo
Oracle
Medium
Software Engineer Locked

Move Forward When Requirements Are Ambiguous

Explain how you advanced an engineering task with ambiguous requirements by identifying the unresolved decision, finding its owner, continuing reversi...

Behavioral & Leadership
0
0
16 people solved
Aug 7, 2026
OpenAI logo
OpenAI
Medium
Machine Learning Engineer

Implement vectorized NumPy ops and explain broadcasting

Implement vectorized NumPy code for: (a) computing pairwise cosine similarity between two real-valued matrices X (shape n×d) and Y (shape m×d) without...

Data Manipulation (SQL/Python)ML Coding
29
0
413 people solved
Aug 11, 2025
Datadog logo
Datadog
Medium
Software Engineer

Design log queries and a buffered writer

Part A — Log store with time-range queries: Implement a data structure that ingests log entries with ISO-8601 timestamps (e.g., YYYY-MM-DD HH:MM:SS) a...

Coding & AlgorithmsData Structure Design
67
0
455 people solved
Sep 6, 2025
OpenAI logo
OpenAI
Medium
Data Scientist Locked

Implement NumPy neural-network layers

This question evaluates competency in implementing neural-network layers and array algebra in NumPy, including matrix multiplication, broadcasting rul...

Machine LearningML CodingDebugging
52
0
433 people solved
Feb 18, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

Design an in-memory database

Design an in-memory database System Design: In-Memory Database Engine (Single-Node Core, Scale-Out Aware) Context Design the core of an in-memory, sin...

System DesignDatabase InternalsTransactions & Isolation
41
0
508 people solved
Aug 4, 2025
BlackRock logo
BlackRock
Easy
Software Engineer Locked

Design a parking lot system

This question evaluates system design competencies such as scalable distributed architecture, real-time state management, data modeling, API design, c...

System DesignSystem Design FundamentalsAPI Design
7
0
123 people solved
Jan 22, 2026
ZipHQ logo
ZipHQ
Hard
Software Engineer

Find shortest path on infinite grid

You are given an infinite 2D grid with integer coordinates. From a cell (x, y) you may move in 4 directions (North/South/East/West) by 1 cell per move...

Coding & AlgorithmsGraphs
64
0
515 people solved
Mar 11, 2026
OpenAI logo
OpenAI
Hard
Data ScientistSenior+

Design and analyze a free-trial A/B test

A/B Test Design: 1‑Month Free Trial Impact on Paid Subscription Conversion You are evaluating whether offering a 1‑month free trial increases paid sub...

Analytics & ExperimentationExperiment Design (A/B Testing)
39
0
292 people solved
Oct 13, 2025
LinkedIn logo
LinkedIn
Medium
Software Engineer Locked

Design a Calendar System

This question evaluates a candidate's ability to design a large-scale calendar backend, covering data modeling for events, recurrence, invitations, an...

System DesignSystem Design FundamentalsIntervals & Scheduling
15
0
132 people solved
Jun 23, 2026
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