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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
Instacart logo
Instacart
Medium
Software Engineer

Parse a password from a matrix

Given an m x n matrix of characters, a starting coordinate (row, col), and a string of moves consisting of 'U', 'D', 'L', 'R', parse a password by vis...

Coding & AlgorithmsGrids & Matrices
10
0
110 people solved
Aug 1, 2025
Salesforce logo
Salesforce
Medium
Software Engineer Locked

Design a configurable monthly API rate limiter

This question evaluates system-design and distributed-systems skills, focusing on scalable API rate limiting, per-user monthly quota configuration and...

System DesignRate Limiting
55
0
464 people solved
Feb 12, 2026
StackAdapt logo
StackAdapt
Easy
Software Engineer

Design a time-windowed key-value store

Implement a time-windowed key-value store ("Windowed Map") that receives key/value updates at irregular times and only keeps entries from the most rec...

Coding & AlgorithmsData Structure DesignStacks & Queues
13
0
175 people solved
Mar 4, 2025
Oracle logo
Oracle
Medium
Software Engineer Locked

Compress Consecutive Characters with Run Lengths

Implement compress_runs(s) and return the compressed string. Work through the function contract, boundary cases, correctness argument, and time and sp...

Coding & Algorithms
0
0
11 people solved
Jul 26, 2026
OneMain Financial logo
OneMain Financial
Hard
Data Scientist

Handle missing data and outliers robustly

Customer Churn Modeling: Preprocessing, Missingness, Outliers, and Evaluation Context You are building a binary churn model for a consumer subscriptio...

Machine Learning
10
0
87 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Calculate Video Call Usage Metrics by Country and Date

video_calls +---------+-----------+------------+---------+----------+ | caller | recipient | ds | call_id | duration | +---------+-----------...

Data Manipulation (SQL/Python)
85
0
181 people solved
Jul 12, 2025
Airbnb logo
Airbnb
Medium
Product Manager

Airbnb Mission, Belonging & Hosting

Behavioral Interview Prompt: Airbnb Mission, Belonging, and Hosting You are interviewing for a Product Manager role. This prompt assesses mission alig...

Behavioral & LeadershipMotivation & FitProduct Sense
26
0
172 people solved
Jul 4, 2025
Circle logo
Circle
Hard
Software Engineer

Design banking payment scheduling system

Design banking payment scheduling system System Design: Banking Payment System Enhancements Context You are building a minimal bank-transfer payment o...

System DesignPayments & LedgersDistributed Transactions & Idempotency
18
0
229 people solved
Aug 4, 2025
Amazon logo
Amazon
Hard
Data Scientist

Diagnose and fix underperforming ML model

Rapidly Improving Recall Under Class Imbalance (One-Day Plan) Context You inherit a binary fraud detection model with severe class imbalance (positive...

Machine LearningModel EvaluationML Fundamentals
12
0
112 people solved
Oct 13, 2025
Google logo
Google
Medium
Software Engineer Locked

Explain LLM fine-tuning and generative models

This question evaluates understanding of LLM adaptation techniques and trade-offs (fine-tuning and parameter-efficient methods) alongside knowledge of...

Machine LearningFine-Tuning & Alignment TechniquesGenerative Models
24
0
197 people solved
Feb 12, 2026
Walmart Labs logo
Walmart Labs
Medium
Software Engineer Locked

Answer Spring Boot and Thymeleaf engineering questions

This question evaluates a developer's competency with Spring Boot and Thymeleaf, covering debugging memory and session issues, designing dependency st...

Software Engineering FundamentalsProgramming Languages
7
0
90 people solved
Jan 6, 2026
Meta logo
Meta
Medium
Software Engineer

Design a marketplace price tracking service

Design a large-scale product price tracking service similar to an e-commerce price monitor. Users can submit product links from a major online marketp...

System Design
2
0
52 people solved
Mar 4, 2026
Stripe logo
Stripe
Medium
Software Engineer

Discuss compensation expectations and flexibility

HR Screen — Compensation Expectations Context: Software Engineer, HR screen. For clarity, total compensation typically includes base salary, annual bo...

Behavioral & Leadership
8
0
70 people solved
Aug 14, 2025
Google logo
Google
Medium
Software Engineer Locked

Determine whether two nodes are related

This question evaluates understanding of graph representations, reachability and connectivity concepts for ancestry relationships, including handling ...

Coding & AlgorithmsGraphs
33
2
229 people solved
Jan 22, 2026
LinkedIn logo
LinkedIn
Medium
Data Scientist

[SQL] Job Ad Metrics with Applicant Filter

Job Ad Metrics Analysis Task Table Structure Table: job_activity job_id INT candidate_id INT activity_type VARCHAR -- can be 'view' or 'apply' Require...

Data Manipulation (SQL/Python)
13
0
88 people solved
Apr 23, 2025
Boston Consulting Group logo
Boston Consulting Group
Easy
Data Scientist

Train GradientBoostingClassifier with 5-Fold Cross-Validation

Train GradientBoostingClassifier with 5-Fold Cross-Validation Final Model Training: GradientBoostingClassifier with 5-Fold CV Context Assume the noteb...

Machine Learning
9
0
77 people solved
Aug 4, 2025
Microsoft logo
Microsoft
Medium
Software EngineerSenior+

Design a replicated key-value store with quorums

Design a distributed system that replicates key–value pairs across multiple replicas. The interviewer wants to focus on replication, quorums, and fail...

System DesignKey-Value StoresConsensus & Replication
11
0
104 people solved
Dec 17, 2025
Amazon logo
Amazon
Medium
Applied Scientist

Check if adding edge creates cycle in digraph

You work with a system that stores items and directed relationships between them (for example, item A points to item B). The relationships form a dire...

Coding & Algorithms
10
0
79 people solved
Oct 26, 2025
Retool logo
Retool
Medium
Software Engineer

Compute max profit with forced trades

Compute max profit with forced trades Given an array prices where prices[i] is the stock price on day i, solve two related tasks under a forced-trade ...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
19
0
130 people solved
Jul 26, 2025
Meta logo
Meta
Hard
Data Scientist

Design bot detection and evaluate trade-offs

Bot-Detection System Design for Comment Activity Context You are designing and evaluating a machine learning system to detect automated (bot) comment ...

Machine Learning
4
0
64 people solved
Oct 13, 2025
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