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

MicrosoftGoogleAmazon

Medium

Software Engineer

Maximize the Sum of a Nonempty Circular Array Segment

Problem Treat the end of nums as adjacent to its beginning. Return the largest sum of a nonempty contiguous circular segment, using each array positio...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings

Calculate Tax in a Progressive Marginal Tax System

Implement a progressive marginal tax calculator. Brackets are sorted (lower_cutoff, rate) pairs. Each portion of income is taxed at the rate for its b...

Machine Learning Engineer Locked

Implement a simplified memcached server

This question evaluates a candidate's ability to implement a TCP-based in-memory key-value store, exercising skills in network I/O, protocol parsing, ...

Coding & Algorithms

97 people solved

May 31, 2026

Self-Attention: Implementation, Complexity, and Efficient Variants

This question evaluates a machine learning candidate's understanding of the self-attention mechanism, including its implementation, computational comp...

Machine LearningTransformers & AttentionML Coding

Choose container set to minimize waste

Question A pharmaceutical company is packaging liquid medicine for shipment. Each customer order has a required volume. The company can choose exactly...

Coding & AlgorithmsBinary SearchSorting

Software Engineer Locked

Implement a hierarchical file store

This question evaluates proficiency in modeling hierarchical file systems, path parsing and manipulation, managing mutable file contents, and analyzin...

Machine Learning Engineer

Implement K-Means Clustering from Scratch in Plain Python or NumPy

Implement k-means clustering from scratch. The interviewer allows NumPy but not a ready-made clustering library, and plain Python is acceptable too. Y...

Machine LearningML CodingUnsupervised Learning

Model Data for Analytics, Reporting, and Applications

Learn to model shared facts, dimensions, history, and metrics for analytics, reproducible reporting, and low-latency data applications.

Data Manipulation (SQL/Python)

Software Engineer Locked

Reason About a Movie Billboard Rotation Component

Recover the missing contract for a movie billboard rotation component before designing its behavior around two ordered maps rather than a heap. Explai...

Software Engineering Fundamentals

Software Engineer Locked

Simplify an Arithmetic Expression Tree with Constant Folding and Identities

Given the abstract syntax tree of an arithmetic expression as a binary tree, write a traversal that returns an equivalent simplified tree using consta...

Software Engineering FundamentalsTreesParsing & Interpreters

Correct and Query Timestamped Prices

Problem Implement a StockPrice object that records a stock price for each timestamp. update(timestamp, price) adds a record or corrects the price alre...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues

23 people solved

Snapchat

Hard

Machine Learning Engineer Locked

Choose Labels and Losses for Multiple Engagement Outcomes

Choose multi-label and multi-task losses using outcome semantics, conditional engagement funnels, missing-label masks, sampling, and calibration.

Machine LearningSupervised LearningModel Evaluation

Choose a Parameter to Reduce Underfitting in Gradient-Boosted Trees

Choose a Parameter to Reduce Underfitting in Gradient-Boosted Trees A gradient-boosted tree model is underfitting. Which parameter could you decrease ...

Machine LearningSupervised LearningML Fundamentals

Implement a uniq-like function

Implement a function similar to the Unix uniq utility. You are given a sequence of strings representing lines of text in the order they appear in a fi...

Coding & AlgorithmsTwo Pointers & Sliding Window

Software Engineer Locked

Design a stock order manager

This question evaluates a candidate's ability to model and manage order lifecycle and state reconciliation, along with understanding of distributed-sy...

System DesignDistributed Transactions & IdempotencyAPI Integration & HTTP Clients

Machine Learning Engineer

Pizza Price Function, Then a Shop Pricing Screen and the Pricing Microservice Question

Write a function that prices a pizza, then discuss how you would turn it into something a real pizza shop could use. The function is short; most of th...

Software Engineering FundamentalsMicroservices & Service ArchitectureCode Quality & Maintainability

Design a Doctor Appointment Booking System for Sudden Demand

Design a Doctor Appointment Booking System for Sudden Demand Design a system where patients search for doctors, view available time slots, book appoin...

Design a Crash-Resilient LRU Cache

You have an in-memory LRU cache with fixed capacity $N$ and the standard get(key) / put(key, value) operations, both $O(1)$ (a hash map plus a doubly ...

System DesignDatabase InternalsCaching

Software Engineer Locked

Design a Refund Workflow as a Directed Acyclic Graph

Design a durable refund workflow as a directed acyclic graph with safe retries and concurrent steps. Handle idempotent side effects, partial-refund li...

Quantitative Researcher Locked

Maximum Edges in a Triangle-Free Graph

Find the maximum number of edges possible in a triangle-free graph on n vertices. Practice extremal graph reasoning, a tight bipartite construction, a...

Coding & Algorithms

41 people solved

Aug 21, 2026

Visa Tools

Visa Sponsors

H-1B Odds Calculator

Visa Bulletin

Tech Interview Questions

Maximize the Sum of a Nonempty Circular Array Segment

Calculate Tax in a Progressive Marginal Tax System

Implement a simplified memcached server

Self-Attention: Implementation, Complexity, and Efficient Variants

Choose container set to minimize waste

Implement a hierarchical file store

Implement K-Means Clustering from Scratch in Plain Python or NumPy

Model Data for Analytics, Reporting, and Applications

Reason About a Movie Billboard Rotation Component

Simplify an Arithmetic Expression Tree with Constant Folding and Identities

Correct and Query Timestamped Prices

Choose Labels and Losses for Multiple Engagement Outcomes

Choose a Parameter to Reduce Underfitting in Gradient-Boosted Trees

Implement a uniq-like function

Design a stock order manager

Pizza Price Function, Then a Shop Pricing Screen and the Pricing Microservice Question

Design a Doctor Appointment Booking System for Sudden Demand

Design a Crash-Resilient LRU Cache

Design a Refund Workflow as a Directed Acyclic Graph

Maximum Edges in a Triangle-Free Graph

Choose your next challenge

Blind 75

ML System Design

System Design Interview