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

ChimeGoogleAmazon

Medium

Software Engineer

Single-Tab Browser Navigation History

Problem Implement BrowserHistory with the native constructor and methods. Begin at homepage. visit(url) goes to a new page and clears every forward-hi...

Coding & AlgorithmsData Structure DesignStacks & Queues

29 people solved

Applied Intuition

Medium

Software Engineer Locked

Design a C++ Ring Buffer for Producer-Consumer Use

Design a fixed-capacity C++ ring buffer for producer-consumer use after making overflow, blocking, and concurrency semantics explicit. Explain FIFO wr...

Software Engineering Fundamentals

Setting Launch Criteria and a Rollout Plan for an AI Agent

Your team has built an AI agent and wants to launch it. As the product manager, how would you decide whether it is ready? `hint Good enough compared w...

Product / Decision MakingAI Product ManagementLLM Evaluation

16 people solved

Oct 1, 2026

Diagnose a Single-Server Crash with Concrete Linux Evidence

Walk through a single-server crash investigation using Linux service, kernel, memory, disk, and boot evidence while planning safe recovery.

Software Engineering FundamentalsDebuggingOperating Systems

Implement a multi-level digital recipe manager

Implement a RecipeManager class for a digital recipe manager. The task is progressive (Levels 1–4). You can assume a single-process in-memory implemen...

Coding & AlgorithmsData Structure Design

Software Engineer AI Locked

Courier Delivery Cost Tracker

This question evaluates a candidate's ability to design a stateful, multi-part class that combines interval tracking with incremental balance accounti...

Coding & AlgorithmsData Structure DesignIntervals & Scheduling

Design ledger and bikemap integration

System Design: Strongly Consistent Ledger + External Service Integration Design two loosely related components for a production-grade environment, and...

System DesignPayments & LedgersAPI Integration & HTTP Clients

Find the Production Bugs in a Dictionary Cache Around an Expensive Computation

The interviewer shows you a short piece of code that caches the results of an expensive function, and asks you to find the problems with it. The origi...

Software Engineering FundamentalsCachingConcurrency

Software EngineerIntern Locked

Project Deep Dive: Kafka Streaming, Redis Caching, and a Go Edge API Gateway

A resume deep dive from a software engineering intern screen: explain a Kafka streaming architecture and Redis caching from past backend work, then de...

Software Engineering FundamentalsProject Deep DiveCaching

Travel app product design: target traveler, trip journey, MVP, metrics and booking flow

You are asked to design an app for booking travel. How would you approach it? `hint Pick a wedge Travelers can already book through airlines, hotel si...

Product Design & StrategyProduct Sense

Software Engineer Locked

Design an Interactive Query Execution Notebook

Design an interactive SQL notebook or online-judge-like query execution service, emphasizing how users submit queries and how clients receive executio...

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

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

153 people solved

Sep 15, 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

Software EngineerNew Grad Locked

Shortest Prefix of a Digit String That Can Build Every Permutation of a Target

Given a digit string and a list of digit targets, return for each target the length of the shortest prefix whose characters could build every permutat...

Coding & AlgorithmsArrays & Strings

Reorder the Original Array into Strict Alternating Peaks

Problem Rearrange nums in place so nums[0]<nums[1]>nums[2]<nums[3] and so on. The source guarantees a valid rearrangement exists and accepts different...

Coding & AlgorithmsSortingArrays & Strings

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...

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

Design an Enterprise AI Research Agent With Internal and Web Retrieval and Citations

Design an enterprise-grade AI research agent, similar in spirit to Glean-style workplace search assistants. An employee asks a complex research questi...

System DesignSystem Design FundamentalsAI Agents

119 people solved

Sep 22, 2026

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Tech Interview Questions

Single-Tab Browser Navigation History

Design a C++ Ring Buffer for Producer-Consumer Use

Setting Launch Criteria and a Rollout Plan for an AI Agent

Diagnose a Single-Server Crash with Concrete Linux Evidence

Implement a multi-level digital recipe manager

Courier Delivery Cost Tracker

Design ledger and bikemap integration

Find the Production Bugs in a Dictionary Cache Around an Expensive Computation

Project Deep Dive: Kafka Streaming, Redis Caching, and a Go Edge API Gateway

Travel app product design: target traveler, trip journey, MVP, metrics and booking flow

Design an Interactive Query Execution Notebook

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

Design a Hotel Search and Reservation System

Diagnose Slow Network Throughput Including Containers

Generate All Distinct Permutations of a List with Duplicate Values

Shortest Prefix of a Digit String That Can Build Every Permutation of a Target

Reorder the Original Array into Strict Alternating Peaks

Design an Order Fulfillment System

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

Design an Enterprise AI Research Agent With Internal and Web Retrieval and Citations

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