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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
Meta logo
Meta
Medium
Software Engineer

Design LCA and find K closest points

Part A — LCA with parent pointers: You are given two nodes a and b in a rooted tree where each node has a parent pointer (you may or may not have dire...

Coding & Algorithms
3
0
36 people solved
Sep 6, 2025
ByteDance logo
ByteDance
Medium
Software Engineer

Solve interval merging and histogram area

The coding round included two algorithm problems: 1. Merge overlapping intervals: Given a list of closed intervals [[start1, end1], [start2, end2], .....

Coding & Algorithms
6
0
78 people solved
Feb 18, 2026
LinkedIn logo
LinkedIn
Medium
Data Scientist

Train with imbalanced sampled data

You are training a binary classifier on a very large dataset where the positive class is rare. Because the full dataset is too large to train on direc...

Machine Learning
9
0
76 people solved
Sep 5, 2025
Optiver logo
Optiver
Medium
Data Scientist

Expected Wait for a Bus That Runs Late Half the Time

Buses on a certain route are scheduled to arrive at your stop every $x$ minutes. Independently for each bus, the bus arrives exactly on schedule with ...

Machine Learning
4
0
43 people solved
Mar 21, 2025
Meta logo
Meta
Medium
Data Scientist

Evaluate the Success of Instagram Checkout

Evaluating Instagram Checkout Instagram Checkout allows users to discover products, add to cart, pay, and manage post-purchase flow without leaving In...

Analytics & ExperimentationLaunch EvaluationBusiness Case Analysis
91
0
114 people solved
Jul 12, 2025
Capital One logo
Capital One
Medium
Data Scientist

Quantify database bug cost/benefit

Bug Impact on Commission and Admin Costs (Jan–Mar) Context and Assumptions - The company earns commission revenue on user spend; an admin fee is a com...

Statistics & Math
8
0
65 people solved
Oct 13, 2025
Uber logo
Uber
Hard
Data Scientist

Improve Estimated Time of Arrival for Uber Riders

Improve Estimated Time of Arrival for Uber Riders Scenario Ride-hailing platform: understanding and improving the Estimated Time of Arrival (ETA) show...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
10
0
127 people solved
Aug 4, 2025
Uber logo
Uber
Hard
Software Engineer Locked

Determine Threshold-Constrained Connectivity

This question evaluates understanding of graph algorithms and constrained connectivity, testing skills in reasoning about weighted undirected graphs, ...

Coding & AlgorithmsGraphs
4
0
78 people solved
Jan 17, 2026
Amazon logo
Amazon
Hard
Data Scientist

Choose Between Fine-Tuning and RAG for Client Chatbot

Choose Between Fine-Tuning and RAG for Client Chatbot Scenario You are building a client-facing chatbot that must answer questions grounded in the cli...

Machine Learning
10
0
86 people solved
Aug 4, 2025
Capital One logo
Capital One
Medium
Data Scientist

Determine Weekly Break-Even Point for Diaper Service

Diaper Service Unit Economics and Inventory Flow A weekly subscription diaper-delivery and cleaning service operates with these parameters: - Customer...

Analytics & Experimentation
70
0
245 people solved
Jul 12, 2025
Capital One logo
Capital One
Medium
Data Scientist

Design cloud product packaging and pricing strategy

Cloud-Service Pricing and Packaging Case Context You are the first PM at a cloud-service startup that is functionally at parity with competitors but h...

Behavioral & Leadership
3
0
50 people solved
Oct 13, 2025
xAI logo
xAI
Medium
Software Engineer

Token Bucket Rate Limiter with Lazy Refill Backed by a Cache

Token Bucket Rate Limiter with Lazy Refill Backed by a Cache You are building the enforcement layer of a rate limiter. Every user has a token bucket s...

Coding & Algorithms
4
1
41 people solved
Sep 23, 2025
Google logo
Google
Hard
Product Manager

Why Would Users Care and Why Build It?

You are interviewing for a Google Product Manager role. Assume the product is a new Google AI productivity assistant integrated into Search, Gmail, Do...

Product Design & StrategyAI Product ManagementMetrics & KPIs
41
0
301 people solved
Jun 20, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer Locked

Count islands by requested sizes

This question evaluates a candidate's understanding of grid connectivity, identification of connected components, and the ability to aggregate compone...

Coding & AlgorithmsGrids & MatricesGraphs
24
0
171 people solved
Jan 22, 2026
Amazon logo
Amazon
Medium
Data Scientist

Design an A/B Test for Dashboard Engagement Impact

A/B Test for Energy Dashboard Engagement A product team is launching a redesigned energy-usage dashboard in a consumer app and wants to measure whethe...

Analytics & Experimentation
13
0
63 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Annotating and forecasting a long‑tail distribution

Annotating and Forecasting a Long-tail Distribution You are analyzing daily share counts across many pages on a social platform. The cross-sectional d...

Statistics & Math
24
0
64 people solved
Jul 12, 2025
Coinbase logo
Coinbase
Hard
Data Scientist

Design KYC experiment amid crypto volatility

A/B Test Design: Improve Mobile KYC Completion During High Market Volatility Context: You are analyzing a mobile onboarding funnel where the KYC (Know...

Analytics & Experimentation
5
0
55 people solved
Oct 13, 2025
Robinhood logo
Robinhood
Medium
Backend Engineer Locked

Deep-Dive a Distributed Service Project

Lead a technical deep dive into a distributed service project, connecting architecture and failure behavior to user goals, capacity, and measurable ou...

Behavioral & Leadership
3
0
37 people solved
Jun 13, 2026
Coursera logo
Coursera
Medium
Software Engineer

Implement plurality and majority voting

You are given an array votes of length n, where each element is a candidate identifier (string or integer). Implement two voting systems: 1) Plurality...

Coding & Algorithms
7
0
63 people solved
Dec 15, 2025
Meta logo
Meta
Medium
Data Scientist

Analyze DAU comments distribution and resampling

Consider the metric comments_per_DAU (number of comments a daily active user makes in a day). a) Shape: Describe and justify the expected distribution...

Statistics & Math
8
1
81 people solved
Oct 13, 2025
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