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

"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_

"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"

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

"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."

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

"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."

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

_The_TaNk_

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

"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."

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

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

Upstart

Easy

Software Engineer Locked

Compute a Point Set's Bounding Rectangle

Compute the smallest axis-aligned bounding rectangle for a nonempty set of two-dimensional integer points. Track minimum and maximum coordinates in on...

Software Engineer Locked

Design a Cache with Hit Counts

This question evaluates a candidate's competence in system design, data structures, concurrency, and observability by requiring a key-value cache that...

Software Engineering FundamentalsData Structure Design

Write left-join queries with tricky filters

Assume 'today' = '2025-09-01'. Do NOT use window functions (e.g., RANK). Use LEFT JOIN, COUNT(DISTINCT), GROUP BY, HAVING as appropriate. Schema: - us...

Data Manipulation (SQL/Python)SQL

Software EngineerSenior+ Locked

Implement a Lazy Tee Iterator in Python

Implement Python tee behavior as independent lazy iterators that read each source item once while handling uneven consumers, end-of-stream propagation...

Software Engineering Fundamentals

77 people solved

Aug 2, 2026

Query carpool ride metrics

Question For a ride-sharing product with carpool capability, answer a series of SQL questions (e.g., daily completed pooled rides, average seats utili...

Data Manipulation (SQL/Python)

Software EngineerSenior+ Locked

Connect Monitoring, Circuit Breakers, Rollback, and CI/CD

Design a backend reliability workflow using actionable monitoring, bounded dependency calls, compatible rollback, and verified staged deployments.

Software Engineering FundamentalsReliability & SRECI/CD & Deployment

Describe a Time You Simplified a System

Tell me about a time you simplified a system by removing redundant components or reducing architectural complexity. What a Strong Answer Covers A spec...

Behavioral & LeadershipInnovation & SimplificationSystem Design Fundamentals

Machine Learning EngineerIntern

Board Simulation: Bottom-Insert Pieces with Uniform Row and Column Detection

Board Simulation: Bottom-Insert Pieces with Uniform Row and Column Detection You must simulate a 2-D game board with R rows and C columns. Each cell i...

Named entity recognition: framing, algorithm choice, data processing, and metrics

Named entity recognition (NER) comes up in an ML design discussion. For concreteness, assume the text is short e-commerce text, such as product listin...

Machine LearningNatural Language ProcessingModel Evaluation

21 people solved

Sep 24, 2026

AmazonBloombergYandex

Medium

Software Engineer

Longest Run of Ones After One Required Deletion

Problem Delete exactly one element of the binary array nums. Return the longest all-one contiguous subarray length in the resulting array,or 0 if ther...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

Design BFS to detect forced win in Tic-Tac-Toe

You are given an n×n Tic-Tac-Toe–like board and a target k (1 ≤ k ≤ n). From the current board state and the player to move, design an algorithm to de...

Coding & AlgorithmsGraphs

Software Engineer I Locked

Design E-Commerce Tables and Indexes for Recent-Spend Queries

Design normalized users, products, orders, and order-line tables for an e-commerce system, preserving historical charged prices and enforcing useful i...

System Design

30 people solved

Aug 8, 2026

Design a Ranked Home News Feed for a Large Social Network

Design the home news feed for a large social network. When users open the app, they see a ranked, infinitely scrollable list of recent posts from the ...

System DesignSearch & Feed SystemsCaching

Choosing Success Metrics for a Personalized Recommendation Row on Netflix

Netflix is introducing "Top Picks," a new feature that uses machine learning to recommend titles to each member. What metrics would you track to decid...

Analytics & ExperimentationMetrics & KPIsExperiment Design (A/B Testing)

Design expense rules engine and return type

Design a Rules Engine for Corporate Card Expenses Context We offer a corporate credit card that employees use for business expenses. Managers set poli...

System DesignLow-Level Design (OOP)API Design

Data ScientistIntern Locked

Infer BA When AB Is the Identity

Analyze what AB = I implies about BA for both same-size square matrices and compatible rectangular matrices, including the projection case.

Machine Learning EngineerSenior+ Locked

Build an LLM-driven text-game agent

This question evaluates a candidate's understanding of integrating large language models into interactive agents, including prompt design, game-state ...

Software Engineering FundamentalsAI AgentsLLM Applications

Behavioral: An AI Initiative You Drove and the Change It Produced

Give an example of how you have applied AI to drive innovation or change, whether inside your organization or for customers. `hint Start from the prob...

Behavioral & LeadershipInnovation & SimplificationAI Product Management

Applied ScientistSenior+ Locked

Merge Overlapping Time Ranges

This question evaluates a candidate's ability to work with interval merging, a core array and sorting problem in technical interviews. It tests unders...

Assign Tasks to the Minimum Number of Workers

Assign Tasks to the Minimum Number of Workers Problem Implement assignMinimumWorkers(tasks) -> workerIds. Each task is [startMinute, durationMinutes]....

Coding & Algorithms

149 people solved

May 1, 2026

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Tech Interview Questions

Compute a Point Set's Bounding Rectangle

Design a Cache with Hit Counts

Write left-join queries with tricky filters

Implement a Lazy Tee Iterator in Python

Query carpool ride metrics

Connect Monitoring, Circuit Breakers, Rollback, and CI/CD

Describe a Time You Simplified a System

Board Simulation: Bottom-Insert Pieces with Uniform Row and Column Detection

Named entity recognition: framing, algorithm choice, data processing, and metrics

Longest Run of Ones After One Required Deletion

Design BFS to detect forced win in Tic-Tac-Toe

Design E-Commerce Tables and Indexes for Recent-Spend Queries

Design a Ranked Home News Feed for a Large Social Network

Choosing Success Metrics for a Personalized Recommendation Row on Netflix

Design expense rules engine and return type

Infer BA When AB Is the Identity

Build an LLM-driven text-game agent

Behavioral: An AI Initiative You Drove and the Change It Produced

Merge Overlapping Time Ranges

Assign Tasks to the Minimum Number of Workers

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