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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
Hard
Software Engineer

Design a scalable banking system

System Design: Core Banking Platform Problem Design a banking system that supports: - Account creation - Balance inquiry - Deposit and withdrawal - At...

System Design
6
0
70 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Software Engineer

Find LCA in a BST

Find LCA in a BST Given the root of a binary search tree and two keys p and q, return the value of their lowest common ancestor (the deepest node whos...

Coding & Algorithms
3
0
54 people solved
Aug 10, 2025
Xometry logo
Xometry
Medium
Machine Learning EngineerSenior+

Explain an End-to-End ML Project

In a first-round interview for a lead machine learning role, walk through your background and one machine learning project you led in detail. Your ans...

Machine Learning
3
0
37 people solved
Mar 7, 2026
DoorDash logo
DoorDash
Hard
Data Scientist Locked

Compute power and interpret guardrails

This question evaluates competency in experimental design and applied statistics for cluster-randomized A/B tests, covering cluster-robust inference, ...

Statistics & MathExperiment Analysis & ReadoutRegression & Statistical Modeling
4
0
86 people solved
Oct 13, 2025
NVIDIA logo
NVIDIA
Medium
Software Engineer

Define developer-centric usability metrics

Usability and Product Metrics Beyond Latency and Accuracy Context: In a technical screen focused on analytics and experimentation, propose how you wou...

Analytics & Experimentation
9
0
62 people solved
Sep 6, 2025
Airwallex logo
Airwallex
Medium
Data ScientistSenior+ Locked

Implement bootstrap mean and variance

This question evaluates the ability to implement bootstrap resampling and compute descriptive statistics, testing competency in statistical estimation...

Coding & Algorithms
5
0
48 people solved
Oct 24, 2025
Uber logo
Uber
Medium
Software Engineer Locked

Design a Stock Trading Platform

This question evaluates a candidate's ability to design a robust, scalable brokerage platform covering distributed systems architecture, transactional...

System DesignTrading SystemsDistributed Transactions & Idempotency
11
0
143 people solved
May 11, 2026
Uber logo
Uber
Medium
Software EngineerIntern Locked

Minimum Delivery Cost Between Cities

This coding interview question evaluates cost optimization and routing over a city network with value-based moves and conditional directed discounts. ...

Coding & AlgorithmsGraphs
17
1
138 people solved
Jul 3, 2026
Uber logo
Uber
Hard
Data Scientist Locked

Build and deploy an uplift targeting model

This question evaluates a candidate's ability to design and deploy uplift/causal targeting models, covering causal inference, uplift estimation, pre-t...

Machine Learning
5
0
76 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist

Present Analytical Process and Recommendations for Credit-Card Profitability.

Presenting Credit-card Profitability Analysis to a Manager You need to brief your manager on an analysis of credit-card profitability and partnership ...

Behavioral & Leadership
27
0
122 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Measuring and mitigating fake news on Facebook

Measuring and Mitigating Fake News Under Reviewer Constraints Policy teams need an overnight view of fake-news prevalence on the platform, but only a ...

Analytics & Experimentation
75
0
161 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Data Scientist

Demonstrate Leadership and Ownership in Energy Analytics Role

Behavioral Interview: Ownership, Resume Walkthrough, and Energy Analytics Motivation You are interviewing for a Data Scientist role on an Amazon-style...

Behavioral & Leadership
23
0
98 people solved
Jul 12, 2025
Amazon logo
Amazon
Hard
Software Engineer Locked

Design a cloud database write path and recovery

This question evaluates expertise in designing transactional write paths and crash recovery for cloud-native relational databases that separate comput...

System DesignDatabase InternalsConsensus & Replication
21
0
181 people solved
Jan 22, 2026
Meta logo
Meta
Medium
Data Scientist

Define Metrics and Account for Network and Novelty Effects

Metrics for Notification-Triggered In-App Surveys Meta's notification system triggers optional in-app surveys to measure user sentiment after notifica...

Analytics & ExperimentationMetrics & KPIsExperiment Design (A/B Testing)
67
0
102 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Data Scientist Locked

Contrast OLS, DiD, and PSM assumptions

Contrast three ways to estimate whether a free employee shuttle raised participation at sites the business chose to equip: OLS, difference-in-differen...

Statistics & Math
6
0
59 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Software EngineerNew Grad

Determine Whether a String Can Be Segmented into Dictionary Words

Problem Given a string and a set of words, return whether the entire string can be formed by concatenating dictionary words. A dictionary word may be ...

Coding & Algorithms
2
0
26 people solved
Dec 21, 2025
TikTok logo
TikTok
Medium
Software Engineer

Design system to detect privacy-leak records

You are given a very large database that contains user data (both structured fields and unstructured text such as logs, messages, and documents). The ...

ML System Design
5
0
58 people solved
Dec 8, 2025
Coinbase logo
Coinbase
Easy
Data Scientist

Evaluate campaign success and decide new trading pair

Context You are a Data Scientist at a crypto exchange. You work with Growth Marketing and Product to evaluate marketing spend and to make listing/laun...

Analytics & Experimentation
8
0
60 people solved
Sep 20, 2025
Atlassian logo
Atlassian
Medium
Data Scientist

Minimize L1 Distance with k Cluster Centers in Array

One-Dimensional k-Center Clustering With L1 Distance You are given an array of n integers on a number line and an integer k, where 1 <= k <= n. Place ...

Machine Learning
18
0
94 people solved
Jul 12, 2025
NVIDIA logo
NVIDIA
Hard
Software Engineer

Design an artifact store on K8s and Cassandra

System Design: Exactly-Once Creation by Name on Cassandra, Deletes, and Read API Design Context You run a Java web API on Kubernetes backed by a Cassa...

System Design
6
0
83 people solved
Sep 6, 2025
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