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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
Meta logo
Meta
Hard
Machine Learning Engineer

Design Nearby and Notification Ranking

Two machine learning system design prompts were mentioned: 1. Nearby place recommendation for a mobile user Design a real-time recommendation syste...

ML System DesignRanking ModelsRecommendation Systems
12
0
177 people solved
Jan 30, 2026
Meta logo
Meta
Medium
Product Analyst Locked

Write Call Analytics SQL Queries

This question evaluates SQL data manipulation and analytical competencies, including aggregation, joins between user and event tables, time-window fil...

Data Manipulation (SQL/Python)
3
0
30 people solved
Jan 28, 2026
Snapchat logo
Snapchat
Medium
Backend Engineer

Count Cross-Group Employee Pairs

You are given n employees labeled from 0 to n - 1 and a list of relationships relations, where each pair [a, b] means employees a and b belong to the ...

Coding & Algorithms
7
0
67 people solved
Jan 28, 2026
Uber logo
Uber
Medium
Data ScientistSenior+ Locked

How would you build UberEats ranking?

This question evaluates machine learning and recommender-systems competencies for ranking in a food delivery marketplace, covering problem formulation...

Machine Learning
8
0
59 people solved
Jan 22, 2026
Meta logo
Meta
Medium
Machine Learning EngineerSenior+ Locked

Design a weapon-ad harmful content detection system

This question evaluates skills in end-to-end system design and applied machine learning for multi-modal harmful content detection, covering scalabilit...

System Design
6
0
70 people solved
Jan 22, 2026
Meta logo
Meta
Medium
Machine Learning EngineerSenior+ Locked

Deep copy a linked list with random pointers

This question evaluates understanding of linked-list structures, pointer/reference manipulation, deep versus shallow copying, and the ability to analy...

Coding & AlgorithmsLinked Lists
4
0
76 people solved
Jan 22, 2026
TikTok logo
TikTok
Medium
Software Engineer Locked

Design a content moderation system

This question evaluates a candidate's competency in designing large-scale content moderation systems, covering distributed architecture, scalability a...

System DesignSystem Design Fundamentals
7
0
125 people solved
Jan 22, 2026
Tesla logo
Tesla
Hard
Software Engineer Locked

Coordinate workers across two exclusive targets

This question evaluates proficiency in concurrent programming and synchronization, focusing on safe resource coordination, mutual exclusion, utilizati...

Coding & AlgorithmsConcurrencyFault Tolerance & Failover
10
0
130 people solved
Jan 22, 2026
Airtable logo
Airtable
Medium
Software Engineer Locked

Explain how to make robust HTTP API calls

This question evaluates understanding of robust HTTP API integration, covering reliability and resilience topics such as timeouts, retries and backoff...

Software Engineering FundamentalsAPI Integration & HTTP ClientsFault Tolerance & Failover
9
0
100 people solved
Jan 22, 2026
Coinbase logo
Coinbase
Medium
Data Scientist Locked

Increment Digit Array

This question evaluates a candidate's competency in array manipulation and elementary arithmetic on digit sequences, including carry propagation and h...

Coding & Algorithms
3
0
59 people solved
Jan 21, 2026
Coinbase logo
Coinbase
Medium
Data Scientist Locked

Design Identity & Trust Experiment

This question evaluates a data scientist's experimental design and causal inference skills, specifically A/B testing methodology, metric selection, po...

Analytics & Experimentation
4
0
51 people solved
Jan 21, 2026
Lyft logo
Lyft
Medium
Data Scientist Locked

Investigate MAU Drop and Test Coupons

This question evaluates a data scientist's competency in product analytics, causal inference, experimentation design, metric decomposition, user segme...

Analytics & ExperimentationMetric DiagnosticsExperiment Design (A/B Testing)
7
0
103 people solved
Jan 20, 2026
Oracle logo
Oracle
Medium
Data ScientistIntern Locked

Count Closed Islands

This question evaluates a candidate's understanding of grid-based connectivity and the ability to detect enclosed regions, testing skills in graph rep...

Coding & Algorithms
6
0
44 people solved
Jan 20, 2026
Gofundme logo
Gofundme
Easy
Software Engineer Locked

Explain CSS specificity and selector precedence

This question evaluates a candidate's understanding of CSS specificity and selector precedence, focusing on how the browser prioritizes competing styl...

Software Engineering Fundamentals
3
0
30 people solved
Jan 19, 2026
Gofundme logo
Gofundme
Easy
Software Engineer Locked

Explain React and Firebase data interaction

This question evaluates understanding of frontend-backend data flow and integration with cloud-hosted databases, specifically concepts like real-time ...

Software Engineering Fundamentals
1
0
34 people solved
Jan 19, 2026
Gofundme logo
Gofundme
Easy
Software Engineer Locked

Validate a bracket string

This question evaluates a candidate's ability to reason about paired-token matching and nested structure correctness in strings, measuring skills in p...

Coding & Algorithms
2
0
35 people solved
Jan 19, 2026
Natoora logo
Natoora
Medium
Data Analyst Locked

When use LLMs for reporting?

This question evaluates the candidate's ability to design and assess end-to-end reporting pipelines that integrate large language models with structur...

Machine Learning
3
0
28 people solved
Jan 18, 2026
Meta logo
Meta
Easy
Data Scientist Locked

Compute probability an account is fake

This question evaluates understanding of conditional probability and Bayesian reasoning, specifically interpreting base rates alongside true positive ...

Statistics & MathProbability
29
1
457 people solved
Jan 17, 2026
Shopify logo
Shopify
Easy
Data Scientist

Present pirated-usage findings to a PM

You computed (1) monthly % of shops using pirated themes and (2) monthly and cumulative estimated revenue loss from pirated themes. Explain how you wo...

Behavioral & LeadershipCommunication & Stakeholders
29
0
204 people solved
Jan 17, 2026
DoorDash logo
DoorDash
Medium
Data Scientist Locked

Investigate LA Completed Orders Decline

This question evaluates a data scientist's skills in product analytics, causal inference, metric decomposition, anomaly investigation, and experimenta...

Analytics & Experimentation
4
0
51 people solved
Jan 15, 2026
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