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

"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

Atlassian

Medium

Machine Learning Engineer

Compute moving average over last N stream

You are given an integer N and an unbounded stream of integers arriving one by one. After each new integer arrives, output the average of the last N i...

Design an inventory management system

Design an inventory management system for an e-commerce business. The system must support: - Updating stock when inventory is received, adjusted, or s...

System DesignDistributed Transactions & IdempotencyConsistency & Availability

Design a Cloud IDE With SSH Access Where One or More Users Share a Host

Design a cloud IDE: a service that gives developers a development environment on remote machines instead of their own computers. Developers connect to...

System DesignSystem Design FundamentalsAuthentication & Authorization

Select next Hangman letter

Given the current state of a Hangman game, implement a function that selects the next letter with the highest likelihood of appearing in the secret wo...

Coding & AlgorithmsString AlgorithmsArrays & Strings

Find the Most Frequent IP Addresses in a File Too Large for Memory

Interview Prompt A file contains IP headers, one record at a time. Return the ten most frequent IP addresses with cutoff ties preserved. If there are ...

Software Engineering Fundamentals

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

Implement topological sort and tree boundary traversal

You are given two separate coding tasks. Problem A — Order courses with prerequisites You have n courses labeled 0..n-1 and a list of prerequisite pai...

Coding & AlgorithmsGraphsTrees

600 people solved

Feb 12, 2026

Solve coding and AI-assisted tasks

This set evaluates algorithmic problem-solving across arrays, immutable linked-list interfaces, parent-pointer tree traversal, string validity via min...

Coding & AlgorithmsGrids & MatricesLinked Lists

Software Engineer Locked

Solve Matrix and Array Distance Problems

This question evaluates competency in graph traversal and shortest-path reasoning for grid-based problems as well as array-based distance computation ...

Find the Kth Smallest Value in a Binary Search Tree

Problem Given a binary search tree with distinct integer values, return its kth smallest value, using one-based k. The tree is represented by parallel...

Software Engineer Locked

Design a rate limiter

This question evaluates a candidate's competency in designing distributed rate limiting systems, covering rate-limiting algorithms, scalability and fa...

System DesignRate Limiting

Implement Hook and Modify UI Interactions

Task: Implement a custom React hook and wire UI interactions Context You are working in a React app that already includes a basic API module and a sim...

Software Engineering FundamentalsReact & UI Frameworks

Parse CSV and format transactions

Given a CSV file containing many transactional records with columns Merchant, Amount, Date (YYYY-MM-DD), and Status, write a script to parse the file ...

Data Manipulation (SQL/Python)

Find degrees of connection in a LinkedIn graph

You are given an undirected graph representing professional connections: - n people labeled 0..n-1 - a list of undirected edges connections, where (a,...

Software EngineerSenior+ Locked

Design O(1) Randomized Multiset

This question evaluates data-structure design skills, understanding of hashing and randomization for uniform sampling, handling of duplicate elements,...

Coding & AlgorithmsData Structure DesignArrays & Strings

Differentiate fixed and variable costs with examples

Unit Economics: Fixed vs. Variable Costs in a Subscription Streaming Business Task - Define fixed cost vs. variable cost for a subscription streaming ...

Machine Learning Engineer

Explain Transformers, attention, decoding, RL, and evaluation

Technical Screen: Transformers, Attention, Decoding, RLHF, Evaluation, and Optimization Context: Assume a modern decoder-only LLM unless stated otherw...

Machine LearningTransformers & AttentionLLM Evaluation

Machine Learning EngineerSenior+ Locked

Design a Drop-off Spot Selector

This question evaluates expertise in ML-driven system design for safety-critical autonomous vehicle decisions, covering real-time decision-making, geo...

Streaming Median Tracker

Streaming Median Tracker Design a data structure that ingests integers one at a time from a stream and can report the median of every integer inserted...

Implement a per-user API rate limiter

You are building an API gateway that must enforce per-user rate limits. Task Implement a rate limiter with the following API: - RateLimiter(int maxReq...

Coding & AlgorithmsRate Limiting

113 people solved

Nov 3, 2025

Tech Interview Questions

Compute moving average over last N stream

Design an inventory management system

Design a Cloud IDE With SSH Access Where One or More Users Share a Host

Select next Hangman letter

Find the Most Frequent IP Addresses in a File Too Large for Memory

Design a Cache with Hit Counts

Implement topological sort and tree boundary traversal

Solve coding and AI-assisted tasks

Solve Matrix and Array Distance Problems

Find the Kth Smallest Value in a Binary Search Tree

Design a rate limiter

Implement Hook and Modify UI Interactions

Parse CSV and format transactions

Find degrees of connection in a LinkedIn graph

Design O(1) Randomized Multiset

Differentiate fixed and variable costs with examples

Explain Transformers, attention, decoding, RL, and evaluation

Design a Drop-off Spot Selector

Streaming Median Tracker

Implement a per-user API rate limiter

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ML System Design

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