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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
Anthropic logo
Anthropic
Hard
Software EngineerSenior+

Lead a Project Retrospective Discussion

Lead a Project Retrospective Discussion Walk through a significant past project as a retrospective. Explain the hardest part, how the team addressed i...

Behavioral & Leadership
4
0
81 people solved
Apr 16, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Implement greedy decoding and beam search

You are given access to an auto-regressive language model that can score the next token based on a prefix. Assume: - next_logprobs(prefix_tokens) -> M...

Coding & AlgorithmsML CodingNatural Language Processing
10
0
175 people solved
Feb 15, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer Locked

Select high-quality math documents from crawls

This ML System Design question evaluates the ability to design scalable, production-grade pipelines for extracting and quality-scoring mathematical co...

ML System DesignAnnotation & Label QualityData Ingestion & CDC
17
0
171 people solved
Dec 15, 2025
Chicago Trading Company logo
Chicago Trading Company
Medium
Software Engineer

Implement a Constant-Time Simple Moving Average

Implement a Constant-Time Simple Moving Average Implement a top-level operation runner for a simple moving average over a fixed-size window of the mos...

Coding & Algorithms
3
0
42 people solved
Apr 20, 2026
Meta logo
Meta
Hard
Machine Learning Engineer Locked

Find A Low-Quality Annotator From Label Data

Practice a pandas-style data analysis prompt for identifying a low-quality annotator from label data. The question emphasizes cleaning, agreement or g...

Data Manipulation (SQL/Python)Annotation & Label QualityPandas & Python Data
6
0
82 people solved
Jun 2, 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
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
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
Google logo
Google
Hard
Software Engineer

Design distributed message queue service

Design a Distributed Message Queue Service Problem Statement Design a distributed message queue system that supports very high throughput for both pro...

System DesignMessaging & Event-DrivenConsensus & Replication
43
0
332 people solved
Sep 6, 2025
Two Sigma logo
Two Sigma
Hard
Data Scientist Locked

Why Use a t-Statistic?

This question evaluates understanding of the t-statistic as a standardized measure for testing whether an estimated effect differs from zero, covering...

Statistics & MathHypothesis Testing
7
0
146 people solved
Mar 18, 2026
Airbnb logo
Airbnb
Medium
Software Engineer Locked

Construct smallest number from I/D pattern

This question evaluates a candidate's ability to reason about permutation constraints, sequence ordering, and combinatorial construction under digit-u...

Coding & AlgorithmsGreedy
42
2
304 people solved
Feb 11, 2026
Salesforce logo
Salesforce
Hard
Software Engineer

How do you perform a thorough code review?

You are given several Python backend files to review (treat this as an “OA in code-review format”). The code performs database operations such as SQL ...

Software Engineering FundamentalsCode Quality & MaintainabilityApplication Security
18
0
185 people solved
Feb 17, 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
412 people solved
Aug 13, 2025
Reddit logo
Reddit
Easy
Software Engineer Locked

Design a game leaderboard service

This question evaluates a candidate's ability to design scalable, low-latency backend systems and distributed data architectures, covering competencie...

System DesignSystem Design FundamentalsConsistency & Availability
17
0
207 people solved
Jan 22, 2026
Retell AI logo
Retell AI
Medium
Software Engineer

Design collaborative document editing backend

You are asked to design the backend for a real-time collaborative document editor similar to Google Docs. The interviewer is specifically interested i...

System DesignDistributed CoordinationConsistency & Availability
24
0
174 people solved
Nov 25, 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
Datadog logo
Datadog
Medium
Software Engineer

Deep-dive a recent project

Project Deep-Dive (Technical Screen: Behavioral & Leadership) Context You will be asked to walk through a recent project you owned end-to-end. Assume ...

Behavioral & LeadershipProject Deep DiveMetrics & KPIs
20
0
154 people solved
Sep 6, 2025
OpenAI logo
OpenAI
Medium
Machine Learning Engineer Locked

Design Real-Time Collaborative Editing

This question evaluates competence in distributed systems, real-time synchronization, concurrency control, data modeling, and automated conflict-resol...

System DesignReal-Time Systems
13
0
211 people solved
Mar 11, 2026
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Restore Valid Addresses by Splitting a Digit String

Split a digit string into exactly k valid zero-to-255 segments, reject leading zeros, prune impossible branches, and return every dotted result in lex...

Coding & Algorithms
1
0
24 people solved
Aug 10, 2026
xAI logo
xAI
Medium
Machine Learning Engineer

Design O(1) random-sampling set

Design a data structure that supports insert(x), remove(x), and get_random() that returns a uniformly random element among the present items, all in e...

Coding & AlgorithmsData Structure Design
26
0
209 people solved
Sep 6, 2025
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