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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
18.6k
Companies
980
Updated
11.12.2026
18.6k Questions 980 Companies11.12.2026
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
TikTok logo
TikTok
Medium
Machine Learning Engineer

Design a model to choose dynamic K

Problem You are building a recommender system with a two-stage ranking pipeline: 1. Candidate retrieval (recall): fetch top-K candidates for a request...

ML System Design
16
0
118 people solved
Feb 11, 2026
Zoox logo
Zoox
Easy
Data Scientist

Choose fastest way to transfer 2 TB

You need to transfer a 2 TB dataset to someone located in San Francisco as fast as possible. - What transfer method(s) would you choose and why? - Sta...

Coding & AlgorithmsNetworking
16
0
215 people solved
Nov 13, 2025
Lambda logo
Lambda
Hard
Software Engineer

Design and explain infra, K8s, routing, and fleet

System Design and Operations Deep-Dive Context: You are interviewing for a Software Engineer role with a focus on system design and engineering. Provi...

System DesignCI/CD & DeploymentContainers & Orchestration
30
0
205 people solved
Sep 6, 2025
Google logo
Google
Hard
Machine Learning Engineer

Respond to long-term concerns after A/B success

Your model performs well in an A/B test (statistically significant lift on the primary metric). However, your manager believes the model may harm long...

Behavioral & LeadershipExperiment Analysis & ReadoutCommunication & Stakeholders
19
1
133 people solved
Jan 6, 2026
Remitly logo
Remitly
Hard
Software Engineer

Whiteboard and Deep Dive a Past Project

System Design: End-to-End Architecture Walkthrough Prompt Whiteboard the end-to-end architecture of a complex, user-facing system you led. Cover: 1. M...

System DesignProject Deep DiveSystem Design Fundamentals
14
0
165 people solved
Aug 13, 2025
Waymo logo
Waymo
Medium
Software EngineerSenior+ Locked

Design an Online Experiment

This question evaluates experimental design and causal inference skills for production ML systems, including metric definition, randomization and trea...

Machine LearningExperiment Design (A/B Testing)Metrics & KPIs
14
0
120 people solved
Feb 6, 2026
Amazon logo
Amazon
Medium
Software Engineer

Implement a Single-Node Priority Pub/Sub

Implement a simplified in-memory publish-subscribe system that runs on a single machine. The system should support users subscribing to topics with a ...

Software Engineering FundamentalsMessaging & Event-DrivenConcurrency
4
0
93 people solved
Apr 9, 2026
Bloomberg logo
BloombergGoogle
Easy
Software Engineer

Test for Exactly Three Positive Divisors

Problem Return whether the positive integer n has exactly three distinct positive divisors. A divisor divides n without remainder; count both 1 and n ...

Coding & AlgorithmsMath & Number Theory
0
0
7 people solved
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
75
0
506 people solved
Sep 6, 2025
Apple logo
Apple
Hard
Data Scientist

Reading a Feature Rollout Report: Mix Shifts, Low-Rate Platforms and Small Samples

A new feature is rolling out on several platforms. A weekly report shows, for each platform, the feature's creation rate, the number of devices behind...

Statistics & MathMetric DiagnosticsSampling & Estimation
0
0
7 people solved
May 2, 2026
Sierra logo
Sierra
Medium
Product Manager

Technical Project Deep Dive: Explaining a Project You Built and Care About

Pick a technical project you worked on and genuinely care about, and walk the interviewer through it: what it was, what you contributed, how it worked...

Behavioral & LeadershipProject Deep DiveTechnical Tradeoffs for PMs
0
0
10 people solved
Apr 30, 2026
Databricks logo
Databricks
Medium
Software EngineerSenior+ Locked

Design bookstore and chat messaging systems

This question evaluates a candidate's competency in large-scale system design, including distributed systems architecture, data modeling, consistency ...

System DesignSystem Design FundamentalsReal-Time Systems
42
0
353 people solved
Oct 10, 2025
Google logo
GoogleAmazonMeta

Also asked at Meta, Microsoft, Bloomberg

Hard
Software Engineer

Count Arrays with Zigzag Comparisons

Problem Given integers n, l, and r, count arrays of length n satisfying all three conditions: - Every element is an integer in the inclusive range [l,...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
0
0
10 people solved
Netflix logo
Netflix
Easy
Machine Learning Engineer Locked

Implement rotating homepage title selector

This question evaluates understanding of data structures and algorithms for prioritized selection with stateful constraints, focusing on maintaining d...

Coding & Algorithms
4
0
85 people solved
Jan 6, 2026
Pinterest logo
Pinterest
Hard
Machine Learning EngineerSenior+ Locked

Design a real-time home feed ranker

This question evaluates an engineer's ability to design scalable, low-latency real-time recommendation and ranking systems that integrate personalizat...

ML System DesignRecommendation SystemsPersonalization
21
0
166 people solved
Jan 12, 2026
Applied Intuition logo
Applied Intuition
Medium
Software Engineer Locked

Parse a protobuf-like schema and answer queries

This question evaluates proficiency in parsing grammar-like schemas, scope-based name resolution for nested types, symbol-table construction, and desi...

Coding & Algorithms
12
0
101 people solved
Jan 8, 2026
Meta logo
Meta
Easy
Data Scientist

Describe a challenging project and work-style conflicts

Question This is the Meta Data Scientist onsite behavioral & leadership round. The anchor prompt is to describe your most challenging recent project e...

Behavioral & LeadershipProject Deep DiveCommunication & Stakeholders
25
0
161 people solved
Dec 6, 2025
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Compute infection spread time

This question evaluates understanding of grid-based graph traversal and propagation dynamics, testing competencies in breadth-first search concepts, s...

Coding & AlgorithmsGrids & MatricesStacks & Queues
13
0
200 people solved
Jan 9, 2026
Optiver logo
Optiver
Medium
Software Engineer Locked

Calculate Days Between Arbitrary Gregorian Dates

Calculate the absolute number of days between arbitrary valid Gregorian dates without enumerating each day or relying on a limited date library. Accou...

Coding & Algorithms
8
0
114 people solved
May 29, 2026
TikTok logo
TikTok
Medium
Product Manager

Is a Mostly Watch-Only Audience a Threat to TikTok's Creator Ecosystem?

You are a product manager at TikTok. You notice that 80% of TikTok's users only watch content and have never created any. Is this a problem? Explain h...

Product Design & StrategyGrowth & MonetizationMetrics & KPIs
1
0
10 people solved
Sep 23, 2026
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