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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
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
Meta logo
Meta
Medium
Data Scientist

Analyze ad targeting expectations and distributions

Ads Profit, Variance Decomposition, and Exponential Timing Context: You run an ad slot with two user segments. On each eligible page view (impression ...

Statistics & Math
16
0
118 people solved
Oct 13, 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
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
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
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
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
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
Scale AI logo
Scale AI
Medium
Software Engineer

Design a large-scale ticketing system

Design an online ticketing system similar to Ticketmaster that supports very high concurrency for popular events where many users try to purchase tick...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
59
0
468 people solved
Dec 8, 2025
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
Nuro logo
Nuro
Hard
Software EngineerIntern

Check Vertical Reflection Symmetry with Duplicate Points

Determine whether a multiset of two-dimensional points is symmetric about some vertical line. Every occurrence of a point must have a reflected occurr...

Coding & AlgorithmsArrays & Strings
8
0
55 people solved
Feb 15, 2026
Vanta logo
Vanta
Medium
Software EngineerSenior+ Locked

Explain Team Impact and Executive Collaboration

Explain how you improved team effectiveness beyond assigned work and collaborated with a senior leader on a consequential decision. Show influence wit...

Behavioral & Leadership
12
0
94 people solved
Jul 13, 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
Capital One logo
Capital One
Hard
Product Analyst

Evaluate food-court profitability and membership strategy

Analyze a product and business case for ValueInc, a membership-based warehouse retailer with an on-site food court that is open to both members and no...

Analytics & ExperimentationBusiness Case AnalysisGrowth & Monetization
20
0
233 people solved
Apr 21, 2025
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
Google logo
Google
Medium
Data Scientist

Implement longest subarray summing to k

Given an integer array nums (length ≤ 200,000; values may be negative) and integer k, return the maximum length and the [l, r] indices of a contiguous...

Coding & AlgorithmsArrays & Strings
16
0
136 people solved
Oct 13, 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
Snapchat logo
Snapchat
Medium
Software EngineerSenior+

Architecture Deep Dive on a System You Built: Decisions, Trade-offs and Lessons

You are interviewing for an engineering manager role, and this system design round is about your own work rather than a new problem. Pick a project th...

System DesignProject Deep DiveSystem Design Fundamentals
1
0
19 people solved
Jan 20, 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
Apple logo
Apple
Hard
Software EngineerNew Grad Locked

Design a smartwatch sensor subsystem

This question evaluates system-level engineering skills for designing a smartwatch sensing subsystem, including sensor selection, trade-offs among acc...

System DesignDebugging
27
1
236 people solved
Feb 25, 2026
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