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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
LinkedIn logo
LinkedIn
Medium
Software Engineer

Find lowest common ancestor

Question LeetCode 236. Lowest Common Ancestor of a Binary Tree — Given a binary tree, find the lowest common ancestor (LCA) of two given nodes. Follow...

Coding & Algorithms
20
0
121 people solved
Jul 29, 2025
DoorDash logo
DoorDash
Medium
Product Manager

DoorDash Rewards Program That Keeps Delivery Customers Coming Back

You are interviewing for a product manager role at DoorDash. Design a loyalty program for DoorDash customers whose purpose is better retention: keepin...

Product Design & StrategyGrowth & MonetizationMetrics & KPIs
0
0
9 people solved
Sep 20, 2026
Meta logo
Meta
Medium
Backend Engineer Locked

Design an Instagram-like platform

This question evaluates proficiency in scalable backend architecture, distributed systems, data modeling, media storage and processing, API design, fe...

System Design
7
0
94 people solved
Apr 8, 2026
Amazon logo
Amazon
Medium
Data Scientist

Describe Your Most Challenging Project and Its Outcome

Describe Your Most Challenging Project and Its Outcome Tell me about the most challenging project, situation, or thing you have worked on as a data sc...

Behavioral & Leadership
27
0
139 people solved
Aug 4, 2025
Pinterest logo
Pinterest
Easy
Machine Learning Engineer

Explain learning-rate fluctuation and vanishing gradients

ML Fundamentals Answer the following conceptual questions: 1. Learning rate vs. training stability: Why can training metrics (loss/accuracy) fluctuate...

Machine LearningNeural Networks & Training
14
1
152 people solved
Dec 15, 2025
Capital One logo
Capital One
Medium
Data Scientist

Describe handling an urgent ad-hoc request

Behavioral Prompt: Urgent, Unscheduled Analytics Request (STAR) You are interviewing for a Data Scientist role and are asked to provide a STAR-formatt...

Behavioral & LeadershipOwnership & ExecutionAmbiguity & Decision Making
10
0
127 people solved
Oct 13, 2025
Microsoft logo
Microsoft
Medium
Machine Learning EngineerIntern

Return the k most frequent values in an array with a deterministic tie rule

Given an integer array nums and an integer k, return the k values that occur most often in nums. Rank the distinct values of nums by frequency (number...

Coding & AlgorithmsHeaps & Priority QueuesSorting
2
0
24 people solved
Feb 5, 2026
Bloomberg logo
Bloomberg
Medium
Software Engineer

Answer core behavioral questions using STAR

Behavioral Questions Answer the following questions. Use concrete examples from your experience. 1. Tell me about a proud project. 2. How did you hand...

Behavioral & Leadership
7
0
81 people solved
Dec 15, 2025
Google logo
Google
Easy
Data Scientist Locked

Build next-word predictor with O(1) lookup

This question evaluates skills in language modeling, data structures, algorithmic optimization, and probabilistic sampling, within the Coding & Algori...

Coding & AlgorithmsData Structure DesignArrays & Strings
12
1
125 people solved
Feb 2, 2026
Reddit logo
Reddit
Easy
Machine Learning Engineer

Design a Comment Ranking System for Threaded Post Discussions

Design the system that ranks the comments under a post on a large online discussion platform. Assume users write comments on posts, reply to each othe...

ML System DesignRanking ModelsModel Evaluation
0
0
2 people solved
Aug 13, 2026
Docker logo
Docker
Medium
Software Engineer Locked

Evaluate an arithmetic expression

This question evaluates parsing and expression-evaluation skills, specifically handling operator precedence, integer division truncation, multi-digit ...

Coding & Algorithms
8
0
73 people solved
Feb 14, 2026
Upstart logo
Upstart
Medium
Data Scientist

Design a Regression Model for Robust Extrapolation Performance

Design a Regression Model for Robust Extrapolation Performance Scenario Onsite machine-learning exercise: your task is to build a regression model usi...

Machine LearningRegression & Statistical ModelingModel Evaluation
72
0
202 people solved
Aug 4, 2025
DRW logo
DRW
Medium
Data Scientist

Compute Markov steady state and expectations

Compute Markov steady state and expectations Probability and Game Theory: Three Sub-questions Context: The exact transition matrix P (for Q1) and the ...

Statistics & MathProbabilityPuzzles & Brainteasers
12
0
120 people solved
Jul 28, 2025
Microsoft logo
Microsoft
Easy
Machine Learning Engineer Locked

Find Top K Largest Numbers

This question evaluates proficiency with heap/priority-queue data structures, selection algorithms, and the ability to analyze time and space complexi...

Coding & Algorithms
3
0
47 people solved
Apr 1, 2026
Amazon logo
Amazon
Medium
Software Engineer

Implement two array-cost minimization algorithms

Implement two array-cost minimization algorithms that appeared back-to-back in an AWS SDE online assessment. Each can be solved independently. Part 1 ...

Coding & Algorithms
16
0
120 people solved
Aug 7, 2025
Coinbase logo
Coinbase
Medium
Software Engineer

Discuss your proudest project

Discuss your proudest project Behavioral prompt — Your most impactful project Context You are in a behavioral/leadership interview for a Software Engi...

Behavioral & Leadership
5
0
106 people solved
Aug 8, 2025
Amazon logo
Amazon
Medium
Software Engineer

Maximum Gap Between Consecutive Workers' Stations

Maximum Gap Between Consecutive Workers' Stations You are given strings skill and station. Worker i requires the skill skill[i], and station j support...

Coding & AlgorithmsGreedyTwo Pointers & Sliding Window
0
0
6 people solved
Amazon logo
Amazon
Hard
Data Scientist

Evaluate Ensemble Models for Bias-Variance, Speed, and Interpretability

Evaluate Ensemble Models for Bias-Variance, Speed, and Interpretability Large-Scale Recommendation System: Ensembles, Overfitting, Metrics, Architectu...

Machine Learning
90
0
359 people solved
Aug 4, 2025
CVS Health logo
CVS Health
Medium
Data Scientist

Use pandas to aggregate, pivot, and label

Given two pandas DataFrames, write code to: (1) merge and aggregate revenue; (2) produce a 2x2 pivot; (3) compute per-state counts with value_counts, ...

Data Manipulation (SQL/Python)Pandas & Python Data
14
0
250 people solved
Oct 13, 2025
Uber logo
Uber
Medium
Product Manager

Uber Product Design: Taking a Gift Card Holder from Code to First Trip or Order

You are a PM at Uber. Someone has just been given an Uber gift card. Design the experience that takes them from holding the card to actually spending ...

Product Design & StrategyProduct Design & ImprovementTrust & Safety
1
0
10 people solved
Jun 26, 2026
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