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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
Disney logo
Disney
Medium
Data Engineer

Hiring Manager Behavioral Round: Project Impact, Influence, Communication, and Setbacks

Question This is the hiring-manager round for a data engineering role: a roughly 30-45 minute conversation, not a peer coding interview. The interview...

Behavioral & Leadership
2
0
59 people solved
Mar 27, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Support a Struggling Teammate Without Sacrificing Team Health

You lead a team with an important but challenging delivery. Use a concrete situation, your decisions and trade-offs, how you influenced others, and ev...

Behavioral & LeadershipMentoring & Team GrowthOwnership & Execution
15
0
148 people solved
Aug 6, 2026
DoorDash logo
DoorDash
Hard
Software Engineer

Design a notification system

System Design: Multi-Channel Notification Platform Context Design a multi-tenant notification platform that delivers messages across email, SMS, and m...

System DesignReal-Time SystemsMessaging & Event-Driven
41
0
332 people solved
Sep 6, 2025
Databricks logo
Databricks
Hard
Data Scientist

Explain ROC-AUC vs PR-AUC tradeoffs

Question You trained a binary classifier that outputs predicted probabilities. Compare ROC-AUC and PR-AUC (the latter usually reported as Average Prec...

Machine LearningModel Evaluation
12
0
166 people solved
Dec 12, 2025
Virtu Financial logo
Virtu Financial
Medium
Data Scientist

Implement Connect Four Winner Detection

Implement a Connect Four-style game engine. The board has 6 rows and 7 columns. Two players alternate turns. On each turn, the current player chooses ...

Coding & Algorithms
14
0
97 people solved
Jan 22, 2026
Jane Street logo
Jane Street
Hard
Software Engineer

Decode an Encrypted Paragraph Tree

Decode an Encrypted Paragraph Tree A document is stored as a tree of paragraphs. Each node holds a paragraph text — a string of lowercase English lett...

Coding & AlgorithmsTreesParsing & Interpreters
18
0
368 people solved
Sep 14, 2022
Zoox logo
Zoox
Medium
Data EngineerSenior+

Write Transaction Analytics SQL Queries

You are given a credit-card transaction dataset with the following tables. transactions | column | type | description | |---|---|---| | transaction_id...

Coding & Algorithms
5
0
65 people solved
Apr 11, 2026
Bloomberg logo
Bloomberg
Easy
Software Engineer

Check connectivity between two subway stations

You are given a description of subway stations A, B, C, D, E, ... as a graph. For each station, you are told which other stations it directly connects...

Coding & AlgorithmsGraphs
18
1
175 people solved
Mar 11, 2026
TikTok logo
TikTok
Medium
Backend Software Engineer

Explain a Difficult Project and Its Scaling Decisions

Explain a Difficult Project and Its Scaling Decisions Choose a technically difficult project you worked on recently. Describe the problem, your respon...

Behavioral & Leadership
2
0
17 people solved
Apr 12, 2026
OpenAI logo
OpenAI
Medium
Data Scientist

Design Schema and Logic for Subscription Event Tracking

user_subscription_events +----------+-------------+---------------------+-----------+---------+ | user_id | event_type | event_time | plan_...

Data Manipulation (SQL/Python)
78
0
209 people solved
Jul 12, 2025
Pinduoduo logo
Pinduoduo
Hard
Software EngineerSenior+

Explain Team Services and Data-Ownership Boundaries

An interviewer asks what your team does, which services it owns, which technologies it uses, and how its upstream and downstream dependencies fit into...

Behavioral & LeadershipCommunication & StakeholdersMicroservices & Service Architecture
1
0
17 people solved
Aug 22, 2026
Affirm logo
Affirm
Medium
Data Scientist

Analyze Loan Payments Using Pandas for Key Insights

loan_payments +------------+------------+-------------+-----------+---------+ | loan_id | payment_id | payment_date | amount | status | +------...

Data Manipulation (SQL/Python)
6
0
52 people solved
Aug 4, 2025
Salesforce logo
Salesforce
Medium
Software Engineer

Design a Multi-Vendor Integration Platform

Design a Multi-Vendor Integration Platform Prompt Design a platform that connects a product to many third-party vendors such as email and team-messagi...

System Design
4
0
51 people solved
Jan 18, 2026
Apple logo
Apple
Medium
Software Engineer

How to debug a Python loop-condition bug

You are given a Python script that appears to hang or produce incorrect results because of a bug in a loop condition (e.g., while/for termination logi...

Software Engineering FundamentalsDebugging
35
0
281 people solved
Mar 6, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Design an LLM-based binary classifier

Design a Binary Text Classifier Using Only a Log-Probability Scoring Helper Context You are building a binary text classifier without fine-tuning. You...

ML System DesignLLM ApplicationsPrompt Engineering
38
0
710 people solved
Sep 6, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Return a Binary Tree in Zigzag Level Order

Implement zigzag_level_order(values) for a binary tree serialized as a zero-based heap array. For an existing node at index i, its children are at 2 ...

Coding & Algorithms
1
0
21 people solved
Apr 11, 2026
TikTok logo
TikTok
Medium
Data Scientist

SQL Queries and Analysis on Bad Advertisers

Scenario You are on the analytics team at TikTok and need to analyze the presence of bad content in ads and identify problematic advertisers. Question...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
14
0
106 people solved
Jun 29, 2025
Amazon logo
Amazon
Easy
Data ScientistIntern

Answer Amazon Leadership Principle Scenarios

In an Amazon Data Scientist intern virtual interview, answer behavioral questions using the STAR method and tie each story to Amazon Leadership Princi...

Behavioral & LeadershipLeadership & InfluenceAmbiguity & Decision Making
37
0
256 people solved
Apr 3, 2026
Google logo
Google
Hard
Data Scientist

Estimate Population Mean and Conversion Rate Accurately

Estimate Population Mean and Conversion Rate Accurately You are asked a series of statistical inference questions covering hypothesis testing, confide...

Statistics & MathHypothesis TestingSampling & Estimation
82
0
323 people solved
Jul 12, 2025
Moment logo
Moment
Medium
Frontend Engineer

Build a Race-Free Memory Card Game in React

Build a Race-Free Memory Card Game in React Implement the interaction logic for a React memory-card game. Every card has a stable ID and a match value...

Software Engineering Fundamentals
2
0
26 people solved
Apr 9, 2026
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