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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
ByteDance logo
ByteDance
Hard
Backend EngineerIntern Locked

Solve Bracket Matching and Tree Width

This composite question evaluates proficiency with core data structures and algorithmic reasoning, covering string-based bracket validation (sequence ...

Coding & Algorithms
3
0
27 people solved
May 31, 2026
DoorDash logo
DoorDash
Hard
Data Scientist

Determine Optimal Dasher Compensation Model and Diagnose Metric Drops

Determine Optimal Dasher Compensation Model and Diagnose Metric Drops Time-Based Dasher Pay Pilot and Marketplace Root-Cause Analysis Context DoorDash...

Analytics & ExperimentationExperiment Design (A/B Testing)Metric Diagnostics
10
0
142 people solved
Aug 4, 2025
Uber logo
Uber
Medium
Machine Learning Engineer

Design a feed ranking system

Design a machine-learning-based feed ranking system for a consumer product. The system should rank candidate posts or items for a user's home feed in ...

ML System DesignRecommendation SystemsRanking Models
12
0
235 people solved
Mar 1, 2026
Anthropic logo
Anthropic
Hard
Software EngineerSenior+

Design an LLM Prompt Playground: Schema, Large Prompts, Sharing and Tiny Edits

Design a prompt playground: a web application where users write prompts for a large language model (LLM), run them against a model, and see the output...

System DesignSystem Design FundamentalsFile & Media Storage
0
0
2 people solved
Jul 26, 2026
DRW logo
DRW
Medium
Data Scientist

Solve Markov and distribution expectation problems

Solve Markov and distribution expectation problems Statistics, Linear Algebra, and Game Theory Fundamentals 1) Stationary Distribution of a Finite Mar...

Statistics & Math
7
0
93 people solved
Aug 4, 2025
Rippling logo
Rippling
Medium
Software Engineer Locked

Design an extensible expense rule evaluator

This question evaluates system-design and API/interface skills for rule engines, focusing on data modeling, extensibility, maintainability, and rule/r...

Software Engineering FundamentalsLow-Level Design (OOP)
40
0
492 people solved
Feb 12, 2026
Stripe logo
Stripe
Medium
Software Engineer

Discuss challenging project examples

Discuss challenging project examples Behavioral and Leadership Interview Prompt — Software Engineer (Onsite) You will be assessed on problem-solving, ...

Behavioral & Leadership
15
0
87 people solved
Jul 29, 2025
Lyft logo
Lyft
Medium
Machine Learning EngineerIntern

Explain Python and Systems Fundamentals

Answer the following software engineering fundamentals questions: 1. A production system has become very slow. How would you detect the bottleneck, me...

Software Engineering FundamentalsDebuggingConcurrency
16
0
122 people solved
Mar 12, 2026
Meta logo
Meta
Easy
Data Scientist

Calculate Posterior Fraud Probability Using Bayes' Theorem

Calculate Posterior Fraud Probability Using Bayes' Theorem Posterior Fraud Probability After a Flag Context You operate a fraud detection system that ...

Statistics & MathProbability
23
0
119 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Data Engineer

Return top-3 content per category

Given a collection of items with fields (content_id, category, rating), implement top_k_by_category(items, k= 3) that returns, for each category, the ...

Data Manipulation (SQL/Python)
2
0
26 people solved
Aug 1, 2025
TikTok logo
TikTok
Hard
Machine Learning Engineer Locked

Answer ML fundamentals and diagnostics questions

This question evaluates proficiency with confusion-matrix metrics (recall and false positive rate), ensemble learning trade-offs, decision-tree split/...

Machine LearningML FundamentalsModel Evaluation
13
0
99 people solved
Jan 22, 2026
Carvana logo
Carvana
Easy
Software Engineer

Answer Cross-Functional Workplace Prompts

Prepare answers for the following behavioral and communication prompts for a software engineering interview: 1. Why are you interested in working for ...

Behavioral & LeadershipConflict & CollaborationCommunication & Stakeholders
1
0
19 people solved
Apr 26, 2026
Amazon logo
Amazon
Hard
Applied Scientist

Describe how you reduced measurable cost

Behavioral question (focus on ownership/delivery): > Tell me about a time you identified and solved a problem that caused measurable cost (e.g., cloud...

Behavioral & LeadershipOwnership & Execution
15
0
122 people solved
Feb 9, 2026
PayPal logo
PayPal
Hard
Data Scientist

Detect credit-card transaction fraud

Credit-Card Fraud Detection: Real-Time Decisioning and System Design You are designing a real-time decisioning system for card-payment authorizations ...

ML System DesignModel EvaluationUnsupervised Learning
20
0
228 people solved
Aug 4, 2025
Amazon logo
Amazon
Medium
Software EngineerNew Grad

Trade Short-Term Benefit for Long-Term Success

Question Tell me about a time you gave up a short-term benefit to improve the likelihood of long-term success. What did you sacrifice, how did you jus...

Behavioral & Leadership
1
0
22 people solved
Mar 12, 2026
Coinbase logo
Coinbase
Medium
Software Engineer

Generate constrained NFT metadata

Generate constrained NFT metadata Given a set of trait types (e.g., background, eyes, hat), each with a list of allowed values, and a target count N, ...

Coding & AlgorithmsBacktracking & Recursion
18
0
142 people solved
Jul 26, 2025
Instacart logo
Instacart
Medium
Data Scientist

Diagnose and fix low conversion rigorously

Diagnose a Checkout Conversion Drop After a Promo Banner Launch Scenario Week-over-week, checkout conversion fell from 42% to 35% after a new promo ba...

Analytics & Experimentation
6
0
66 people solved
Oct 13, 2025
LinkedIn logo
LinkedIn
Medium
Software Engineer

Count islands and distinct shapes

Question LeetCode 200. Number of Islands LeetCode 694. Number of Distinct Islands https://leetcode.com/problems/number-of-islands/description/ https:/...

Coding & Algorithms
6
0
47 people solved
Jul 29, 2025
TikTok logo
TikTok
Medium
Software Engineer

Explain DPO and construct its training data

You are working on a project to fine-tune a large language model (LLM) using Direct Preference Optimization (DPO). Answer the following: 1. Conceptual...

Machine Learning
5
0
64 people solved
Dec 8, 2025
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Explain how browser authentication works with JWTs

This question evaluates understanding of browser-based authentication with JWTs, covering token storage trade-offs, how tokens are sent with requests,...

Software Engineering Fundamentals
9
0
72 people solved
Feb 11, 2026
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