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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Airbnb logo
Airbnb
Medium
Data Scientist

Aggregate User Activity, Fit Regression, Interpret Coefficients

user_metrics +----------+------------+---------+--------+-----------+ | user_id | activity_dt| variant | clicks | purchases | +----------+-----------...

Data Manipulation (SQL/Python)Regression & Statistical ModelingSQL
115
0
365 people solved
Jul 12, 2025
NVIDIA logo
NVIDIA
Hard
Machine Learning Engineer

Discuss Transformer LLM Design

Discuss Transformer LLM Design System-Design-Oriented LLM Question Context: You are designing, fine-tuning, and operating a Transformer-based large la...

ML System DesignTransformers & AttentionFine-Tuning & Alignment Techniques
45
0
205 people solved
Jul 29, 2025
Fanatics logo
Fanatics
Medium
Software Engineer

Clarify employment type at Microsoft

Behavioral Question: Contractor vs Full‑Time Experience at Microsoft Context You are in a Software Engineer onsite behavioral round. The interviewer w...

Behavioral & LeadershipOwnership & ExecutionProject Deep Dive
11
0
146 people solved
Sep 6, 2025
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
46
0
423 people solved
Sep 6, 2025
Airbnb logo
Airbnb
Medium
Data Scientist

Define Success Metrics and Experiment Plan for Product Development

Define Success Metrics and Experiment Plan for Product Development You are in a product-planning session for a new change to the core booking funnel i...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
40
0
150 people solved
Jul 12, 2025
NVIDIA logo
NVIDIA
Hard
Software Engineer

Design a distributed multi-user counter

Design a Horizontally Scalable Distributed Counter Service Context You are designing a distributed counter service used concurrently by many clients. ...

System DesignDistributed CoordinationConsistency & Availability
9
0
139 people solved
Sep 6, 2025
ByteDance logo
ByteDance
Medium
Data Scientist Locked

Choose Ranking Functions, Customer Value Metrics, and Predictive Models

A machine-learning and analytics fundamentals interview covering SQL ranking functions, defensible high-value-customer definitions, and model selectio...

Machine LearningSQLMetrics & KPIs
7
0
110 people solved
Aug 3, 2026
xAI logo
xAI
Medium
Software Engineer

Explain strings, moves, and concurrency

Question What is a string in programming languages? What fields are stored in a typical struct string and how would you implement one yourself? What i...

Coding & Algorithms
27
0
94 people solved
Jul 29, 2025
Amazon logo
Amazon
Medium
Software Engineer Locked

Dive Deep to Find the Root Cause of a Problem

Describe a technical investigation in which the first plausible explanation was incomplete or wrong. Trace the symptoms, competing hypotheses, evidenc...

Behavioral & Leadership
0
0
14 people solved
Jul 31, 2026
Intuit logo
Intuit
Medium
Software Engineer

Solve word segmentation and React palindrome validation

Part A — String segmentation: Given a non-empty string s and a dictionary of valid words, design an algorithm to determine whether s can be segmented ...

Coding & AlgorithmsDynamic ProgrammingBacktracking & Recursion
12
0
109 people solved
Sep 6, 2025
Citadel logo
Citadel
Medium
Software EngineerIntern

Design alerting for application-to-exchange mappings

Problem: Alerting design for application→exchange mappings You are building a service that receives an ordered stream of mapping events: - register(ap...

System DesignObservabilityBatch & Stream Processing
38
0
684 people solved
Feb 11, 2026
Apple logo
Apple
Medium
Machine Learning Engineer

Design CI/CD for AI Services

Design a CI/CD platform for a large AI product organization. The platform must support backend services, model-serving APIs, data and feature pipeline...

System DesignCI/CD & DeploymentContainers & Orchestration
11
0
146 people solved
Feb 13, 2026
LinkedIn logo
LinkedIn
Medium
DevOps EngineerSenior+ Locked

Explore an Unknown Grid and Return a Robot Path

Design a robot algorithm that explores an initially unknown finite grid and returns a shortest traversable path from the start to a known target, or r...

Software Engineering Fundamentals
4
0
33 people solved
Aug 1, 2026
Citadel logo
Citadel
Medium
Data Scientist

Derive lower bound for equicorrelation rho

Equicorrelation Matrix PSD Condition Setup Consider zero-mean, unit-variance random variables whose pairwise correlations are all equal to a common va...

Statistics & MathProbability
18
0
148 people solved
Oct 13, 2025
MathWorks logo
MathWorks
Hard
Software Engineer

Deduce position from logic clues

Constraint-Satisfaction on a 2D Grid with Relational Clues Context You are given a rectangular grid with R rows and C columns. A set of named entities...

Statistics & Math
10
0
100 people solved
Sep 6, 2025
Tesla logo
Tesla
Medium
Data Engineer Locked

Write SQL Data Transformation Queries

This question evaluates proficiency in SQL data transformation and aggregation, testing competencies such as monthly-reset running totals, hierarchica...

Coding & Algorithms
11
0
84 people solved
May 4, 2026
Amazon logo
Amazon
Medium
Data Scientist

Profile and visualize an unfamiliar dataset

Task: Quickly Understand an Undocumented Events+Purchases CSV and Produce Executive-Ready Visuals Context You are handed a single CSV that mixes user ...

Analytics & Experimentation
11
0
89 people solved
Oct 13, 2025
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Design short-video retrieval with sparse text

You are designing the candidate-generation (retrieval) and recommendation system for a short-video app. Constraints and setting: - Users can search wi...

ML System Design
14
0
102 people solved
Feb 3, 2026
Scale AI logo
Scale AI
Easy
Machine Learning Engineer Locked

Explain LLM post-training methods and tradeoffs

This question evaluates a practitioner's knowledge of LLM post-training methods—including supervised fine-tuning, preference optimization approaches (...

Machine LearningFine-Tuning & Alignment TechniquesAI Safety & Alignment
42
0
405 people solved
Feb 12, 2026
Google logo
Google
Medium
Software EngineerNew Grad

Explain Changing Priorities and Your Role on a Team

Explain Changing Priorities and Your Role on a Team Describe how you respond when project priorities change and how you characterize the role you usua...

Behavioral & Leadership
3
0
33 people solved
Dec 8, 2025
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