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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
Rippling logo
Rippling
Hard
Software Engineer

Design a real-time delivery dashboard

System Design: Real-Time Delivery Operations Dashboard Context Design a real-time operations dashboard for a two-sided delivery platform. The dashboar...

System DesignReal-Time SystemsGeo & Delivery Systems
50
0
459 people solved
Sep 6, 2025
Google logo
Google
Easy
Software Engineer Locked

LLM Foundations: Architecture, Adaptation, and Steering

This question evaluates a candidate's conceptual understanding of large language model architecture, adaptation, and inference-time control. It probes...

Machine LearningTransformers & AttentionFine-Tuning & Alignment Techniques
24
0
263 people solved
Jun 22, 2026
Salesforce logo
Salesforce
Medium
Member of Technical Staff Locked

Track Top-K Frequent Elements from an Unbounded Stream

Design continuous top-k frequency tracking for an unbounded stream with explicit snapshot, tie, replay, and window semantics. The solution compares ex...

System Design
4
0
52 people solved
Aug 31, 2026
Oracle logo
Oracle
Medium
Software Engineer

Compute letter frequencies from encoded string

Problem You are given an encoded string s representing a string of lowercase English letters (a–z). The encoding follows these rules: 1. Letters a to ...

Coding & AlgorithmsParsing & InterpretersArrays & Strings
8
1
146 people solved
Mar 1, 2026
Clickup logo
Clickup
Medium
Software Engineer

Design weekly comment digest

Design a service that sends a weekly email digest of the top comments on each post to the post owner. Requirements: - Posts receive comments throughou...

System Design
7
0
54 people solved
Dec 15, 2025
Apple logo
Apple
Hard
Software Engineer

Design video platform and catalog system

System Design: Two Independent Systems You are asked to design two large-scale systems. For each system, provide: - Scope and key requirements - Exter...

System DesignFile & Media StorageSearch & Feed Systems
14
0
183 people solved
Sep 6, 2025
Coinbase logo
Coinbase
Medium
Data Scientist

Write SQL: sum values ≤ each row’s value

Given table numbers(id INT PRIMARY KEY, val INT), return for every row the sum of all val across the entire table that are ≤ that row’s val (i.e., com...

Data Manipulation (SQL/Python)SQLIndexing & Query Performance
11
1
99 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Medium
Software Engineer

Select the best dasher for an order

You need to assign an order to a dasher. Input: - An order with a pickup location (x, y). - A list of dashers, each with: - id - current location ...

Coding & Algorithms
37
0
288 people solved
Jan 14, 2026
Apple logo
Apple
Medium
Software EngineerNew Grad

Explain Java Polymorphism, Overloading, and Overriding

Explain polymorphism in Java, then distinguish method overloading from method overriding. Use a small example to show how the declared reference type ...

Software Engineering FundamentalsProgramming Languages
0
0
11 people solved
Mar 14, 2026
Gusto logo
Gusto
Medium
Software EngineerSenior+ Locked

Design restaurant shift scheduling

This question evaluates skills in data modeling, backend system architecture, API design, scalability engineering, and consistency management for a mu...

System DesignSystem Design FundamentalsStorage & Sharding
13
0
156 people solved
Mar 3, 2026
Jane Street logo
Jane Street
Medium
Quantitative Trader

Two Opaque Boxes: Place or Take for Maximum Expected Payoff

You are playing a one-player game with two opaque boxes, both of which start empty. The game lasts exactly 100 turns, and on every turn you must choos...

Coding & Algorithms
9
0
127 people solved
Aug 3, 2025
Meta logo
Meta
Medium
Machine Learning Engineer Locked

Design an image copyright-violation detection system

This question evaluates competency in designing scalable machine learning systems for image copyright detection, testing knowledge across computer vis...

ML System DesignComputer VisionEmbeddings & Vector Search
17
0
174 people solved
Feb 12, 2026
Citadel logo
Citadel
Medium
Data Scientist

Analyze Correlations and Generate Gaussians

You are interviewing for a quantitative data science role. Answer the following probability and simulation questions: 1. Let \(X\), \(Y\), and \(Z\) b...

Machine LearningProbability
34
0
330 people solved
Feb 21, 2026
Uber logo
Uber
Medium
Software EngineerIntern Locked

Kth Employee Reached in an Ordered Hierarchy

This tree-algorithms interview question evaluates practical understanding of ordered hierarchy traversal and repeated subtree selection queries. It is...

Coding & AlgorithmsTrees
13
0
182 people solved
Jul 3, 2026
Thomson Reuters logo
Thomson Reuters
Easy
Machine Learning EngineerSenior+

Applied Machine Learning Assessment: Metrics, Evaluation, and NLP Fundamentals

Reason through an applied machine-learning assessment covering annotation agreement, model metrics, reproducibility, NLP basics, ranking metrics, and ...

Machine Learning
7
0
57 people solved
Apr 20, 2026
Amazon logo
Amazon
Hard
Software Engineer

Design a fraud detection system

Design a Real-Time Payment Fraud Detection System Design an ML-powered system that scores each online card-not-present (CNP) payment during authorizat...

ML System DesignAnnotation & Label QualityML Data Pipelines & Feature Stores
26
0
215 people solved
Aug 10, 2025
OpenAI logo
OpenAI
Medium
Machine Learning Engineer Locked

Design an OOD detection system

This question evaluates a candidate's competency in ML system design, specifically out-of-distribution detection, production monitoring, interpretabil...

ML System DesignModel Monitoring & DriftModel Evaluation
42
0
340 people solved
Dec 14, 2025
Lyft logo
Lyft
Hard
Software Engineer

Design a scalable news feed system

Design the backend for a social app's news feed You are designing the backend that powers a mobile social app's home feed (a Twitter/Instagram-style h...

System DesignSearch & Feed SystemsCaching
40
0
312 people solved
Jul 27, 2025
Lyft logo
Lyft
Medium
Product Manager

Lyft Product Improvement: Rider Journey From Ride Confirmation to Trip End

You are a product manager at Lyft and are asked to improve the experience after a ride has been booked. Define what that part of the experience includ...

Product Design & StrategyProduct Design & ImprovementMetrics & KPIs
1
0
13 people solved
Jun 29, 2026
xAI logo
xAI
Medium
Machine Learning Engineer

Describe your research and contributions

Describe your research and contributions 10–15 Minute Research Project Overview (Technical Screen) Context You are interviewing for a Machine Learning...

Behavioral & LeadershipProject Deep DiveModel Evaluation
27
0
215 people solved
Jul 17, 2025
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