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

Nuro

Medium

Software Engineer

Design a Scheduler for Weekly Self-Driving Simulation Jobs with Dependent Phases

Design a job scheduler for a self-driving car simulation platform. Every week the platform runs about 10,000 simulation cases. Each case is a job made...

System DesignJob Scheduling & WorkflowsFault Tolerance & Failover

Software Engineer Locked

Diagnose Slow Network Throughput Including Containers

Investigate slow network throughput across application, transport, host, and container layers using controlled comparisons, retransmissions, limits, a...

Software Engineering FundamentalsDebuggingContainers & Orchestration

Expected Total Backward Steps When Called Guests Move to the Front of a Random Line

One hundred guests, numbered 1 to 100, stand in a single line to enter a party, in a uniformly random order. The host calls the numbers one at a time....

Statistics & MathProbabilityPuzzles & Brainteasers

Probability Limited Stock Covers Every Customer in a Queue

A queue of $N$ customers is waiting in a store. Each customer will buy exactly one item: product A with probability $p$, or product B with probability...

Statistics & MathProbability

Design a Logger That Runs Each Message Through an Ordered List of Handlers

Design a small logging library in an object-oriented way. A Logger is created with a list of handlers, and every message passed to log must go through...

Software Engineering FundamentalsLow-Level Design (OOP)Testing & Quality

Software Engineer Locked

Design a Hotel Search and Reservation System

Create a hotel search and reservation architecture spanning discovery, date-range availability, quotes, booking, cancellation, and lookup. The design ...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency

Simulate a fixed-capacity least-recently-used cache over get and put operations

Design a cache with a fixed capacity that evicts the least recently used key when it is full. To make it testable as one function, you receive the cap...

Coding & AlgorithmsData Structure DesignLinked Lists

48 people solved

Oct 4, 2026

BloombergGoogleAmazon

Easy

Software Engineer

Reverse All Bits of an Even Signed Integer

Problem Reverse the order of all 32 bits in the given signed-integer input and return the signed integer representing that reversed pattern. Leading z...

Coding & AlgorithmsBit Manipulation

Design automatic travel insurance enrollment triggered by customer location

Design the backend for a mobile banking app feature that enrolls customers in travel insurance automatically, based on where they are. A customer opts...

System DesignMessaging & Event-DrivenDistributed Transactions & Idempotency

Design a Product Catalog Ingested From Full Retailer Snapshots With Admin Overrides

Design a product catalog system. Retailers send their catalogs to the platform as snapshot files, users browse the resulting catalog, and platform adm...

System DesignSystem Design FundamentalsETL & Data Pipelines

50 people solved

Sep 24, 2026

Medium

Software Engineer Locked

Generate All Distinct Permutations of a List with Duplicate Values

Given a list of up to eight integers that may contain duplicates, return every distinct permutation exactly once, sorted in lexicographic order. It te...

Coding & AlgorithmsBacktracking & Recursion

Design an Order Fulfillment System

Design an Order Fulfillment System Design the backend flow that takes an accepted customer order through inventory reservation, payment, warehouse pro...

System Design

125 people solved

Aug 24, 2026

GoogleMicrosoftAmazon

Easy

Software Engineer

List Email Spellings That Occur More Than Once

Problem List every duplicate email from Person once, under the output label Email. The email field is guaranteed non-NULL and contains no uppercase le...

Data Manipulation (SQL/Python)SQLData Cleaning & Wrangling

Design a Spam Review Workflow with Classifiers, AI Agents, and Human Labelers

Design a Spam Review Workflow with Classifiers, AI Agents, and Human Labelers Design a spam detection system that combines a classifier, an AI agent, ...

ML System DesignAI AgentsAnnotation & Label Quality

Maximize Nonoverlapping Trades under a Transaction Cap

Problem Given chronological prices and an integer k, return the maximum profit from at most k buy/sell transactions. Hold at most one share at a time:...

Coding & AlgorithmsDynamic Programming

Explain a Project with a System Diagram and Technical Tradeoffs

Walk through a project you worked on, draw its system diagram, and explain an important tradeoff and technical challenge. Make your ownership and the ...

Behavioral & LeadershipProject Deep DiveSystem Design Fundamentals

11 people solved

Oct 16, 2026

Design a Notification System That Delivers Events to Users at Scale

Design the notification system for a large social platform. Many product services, such as comments, reactions, friend requests, messages, and event r...

System DesignReal-Time SystemsMessaging & Event-Driven

Software Engineer Locked

Merge Two Strings Using the Longest Edge Overlap

Compare both suffix-to-prefix concatenation orders, merge the longest edge overlap, and favor the original string order when overlap lengths tie.

Coding & AlgorithmsString Algorithms

Define the Role Capital One's Banking App Plays in the Bank's Growth and Profit

You are interviewing for a product manager role at Capital One. The interviewer asks you to lay out the business strategy for the company's mobile ban...

Product Design & StrategyProduct StrategyGrowth & Monetization

Bar-Raiser Project Deep Dive: Defending Decisions, Trade-offs, Impact and Lessons

In the final round of a backend software engineering loop, a bar raiser combines behavioral questions with a deep dive into your past work. The core o...

Behavioral & LeadershipProject Deep Dive

36 people solved

Sep 16, 2026

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Tech Interview Questions

Design a Scheduler for Weekly Self-Driving Simulation Jobs with Dependent Phases

Diagnose Slow Network Throughput Including Containers

Expected Total Backward Steps When Called Guests Move to the Front of a Random Line

Probability Limited Stock Covers Every Customer in a Queue

Design a Logger That Runs Each Message Through an Ordered List of Handlers

Design a Hotel Search and Reservation System

Simulate a fixed-capacity least-recently-used cache over get and put operations

Reverse All Bits of an Even Signed Integer

Design automatic travel insurance enrollment triggered by customer location

Design a Product Catalog Ingested From Full Retailer Snapshots With Admin Overrides

Generate All Distinct Permutations of a List with Duplicate Values

Design an Order Fulfillment System

List Email Spellings That Occur More Than Once

Design a Spam Review Workflow with Classifiers, AI Agents, and Human Labelers

Maximize Nonoverlapping Trades under a Transaction Cap

Explain a Project with a System Diagram and Technical Tradeoffs

Design a Notification System That Delivers Events to Users at Scale

Merge Two Strings Using the Longest Edge Overlap

Define the Role Capital One's Banking App Plays in the Bank's Growth and Profit

Bar-Raiser Project Deep Dive: Defending Decisions, Trade-offs, Impact and Lessons

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