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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
Atlassian logo
Atlassian
Medium
Data Scientist

Diagnose Checkout Rate Drop: Steps and Analyses

Diagnose Checkout Rate Drop: Steps and Analyses Scenario A core product metric (checkout-completion rate) shows an unexpected change. Leadership needs...

Analytics & Experimentation
54
0
200 people solved
Aug 4, 2025
Uber logo
Uber
Hard
Data Scientist

Design a robust email A/B test

A/B Test Design: New Email Subject Line for Weekly Campaign You manage a weekly email campaign to 10 million users. Baseline unique click-through rate...

Analytics & Experimentation
10
0
83 people solved
Oct 13, 2025
Google logo
Google
Medium
Product Manager

PM Behavioral: A Failure You Owned, How You Responded and What Changed After

Tell me about a failure you were responsible for, and walk me through how you handled it. `hint Pick a failure with real stakes Choose a miss where yo...

Behavioral & LeadershipFailure & Learning
0
0
4 people solved
Jun 19, 2026
Capital One logo
Capital One
Medium
Data Scientist

Analyze ad watch-time with Excel pivots

You are given a flat file with these columns: Date (Excel date, no time zone), UserID, AdID, WatchSeconds (integer ≥ 0), Clicks (integer ≥ 0). Using o...

Analytics & ExperimentationBI & Reporting SystemsMetrics & KPIs
7
0
127 people solved
Oct 13, 2025
Jump Trading logo
Jump Trading
Medium
Software Engineer

Explain C++ vector, unordered_map, and virtual functions

Explain C++ vector, unordered_map, and virtual functions In C++, explain: - The amortized and worst-case time complexity of vector::push_back, and how...

Coding & AlgorithmsProgramming Languages
38
0
279 people solved
Jul 16, 2025
Spotify logo
Spotify
Medium
Product Manager

Spotify Product Strategy: Deciding Whether to Back Listener Interaction in Podcasts

You are a product manager at Spotify. The company is weighing whether to put resources into interactive podcasts: shows that listeners can take part i...

Product Design & StrategyProduct StrategyMarket & Competitive Analysis
1
0
10 people solved
Sep 13, 2026
Apple logo
Apple
Medium
Machine Learning Engineer

Compare audio preprocessing and training

Suppose you are building an audio model for a voice assistant. Compare common audio data preprocessing approaches and explain their trade-offs. For ex...

Machine LearningFeature EngineeringNeural Networks & Training
16
0
142 people solved
Feb 15, 2026
Databricks logo
Databricks
Medium
Machine Learning EngineerSenior+ Locked

Resolve a Design Conflict

This question evaluates conflict resolution, stakeholder management, technical decision-making, and collaborative leadership skills within a Machine L...

Behavioral & Leadership
11
0
79 people solved
Feb 7, 2026
Datadog logo
Datadog
Medium
Software Engineer

Deep-dive a recent project

Project Deep-Dive (Technical Screen: Behavioral & Leadership) Context You will be asked to walk through a recent project you owned end-to-end. Assume ...

Behavioral & LeadershipProject Deep DiveMetrics & KPIs
24
0
184 people solved
Sep 6, 2025
Capital One logo
Capital One
Medium
Data Scientist

Audit flight data quality from metadata

You’re given an airline on‑time dataset and a one‑page “Metadata” slide that claims: flight_date (string, local time), dep_time/arr_time (HHMM local),...

Data Manipulation (SQL/Python)
4
0
40 people solved
Oct 13, 2025
Apple logo
Apple
Medium
Data Scientist

Build leak-safe sklearn model with calibration

You must build an end‑to‑end scikit‑learn pipeline to predict churn_28d at decision time t0 using only features available at or before t0 (no leakage)...

Machine LearningSupervised LearningFeature Engineering
11
0
145 people solved
Oct 13, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Peer-to-Peer File Distribution: Discovery, Chunked Transfer and Integrity Checks

You are asked to design a peer-to-peer file sharing system. Users publish files they hold, and other users download those files directly from the peer...

System DesignFile & Media StorageNetworking
0
0
8 people solved
Jan 8, 2026
Google logo
Google
Medium
Data Scientist

Estimate b when features exceed samples

Consider the linear model y = Xb + ε with X ∈ R^{n×(m+1)} including an intercept. a) Derive the OLS estimator b̂ = (XᵀX)^{-1}Xᵀy, stating the rank con...

Machine LearningRegression & Statistical ModelingML Fundamentals
17
0
123 people solved
Oct 13, 2025
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
8
0
108 people solved
Aug 4, 2025
Qube Research & Technologies logo
Qube Research & Technologies
Hard
Software Engineer Locked

Explain left-skewed returns and Black–Scholes terms

This question evaluates understanding of quantitative finance and statistical concepts—specifically interpretation of left-skewed return distributions...

Software Engineering Fundamentals
3
0
53 people solved
Jan 15, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Medium
Data Scientist Locked

Compute bus-on-time and dice-sum probabilities

This question evaluates understanding of probability concepts including a continuous uniform waiting-time model for bus arrivals and discrete outcome ...

Coding & Algorithms
12
0
95 people solved
Jan 22, 2026
Capital One logo
Capital One
Medium
Business AnalystSenior+

Optimize invites under capacity constraints

You have n donors (n up to 100,000). For each donor i you know: p_online[i] (probability of donating if emailed), a_online[i] (expected donation condi...

Coding & AlgorithmsBusiness Case AnalysisDynamic Programming
16
0
134 people solved
Oct 13, 2025
Qube Research & Technologies logo
Qube Research & Technologies
Medium
Software Engineer

Implement a type-erased function wrapper

Implement a minimal std::function-like callable wrapper in C++ using type erasure via inheritance and a virtual call. Define a template Function<R(Arg...

Coding & AlgorithmsProgramming LanguagesMemory Management
14
0
158 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Software Engineer

Maintain real-time top-K products from events

Design a data structure/class that ingests a stream of product events and returns the current top‑K products at any time. Events include {timestamp, p...

Coding & Algorithms
6
1
95 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Software Engineer

Find Kth Largest and Tree Ancestors

In a technical phone interview, the candidate was asked two coding problems in the same round: 1. K-th largest element in an array Given an unsorte...

Coding & Algorithms
4
0
69 people solved
Feb 22, 2026
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