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

Amazon

Hard

Software Engineer

Design an extensible ticketing system

System Design: Extensible EventTicketSystem Context Design a ticketing platform that sells tickets for concerts, movies, and sports. The system must s...

Software Engineer Locked

Manage Prompt and Model Behavior in Production

Design production controls for prompts, models, retrieval policy, tools, and decoding settings in an AI application. Use immutable configuration versi...

Machine Learning Engineer

Implement automatic braking logic in Python

Using Python, implement a simple automatic braking function. Given current speed v (m/s), distance to obstacle d (m), maximum deceleration a_max (m/s^...

Explain C++ memory, types, and concurrency fundamentals

Explain C++ memory, types, and concurrency fundamentals Answer the following C++ / systems fundamentals questions: 1) C++ class vs struct - What are t...

Software Engineering Fundamentals

Retrieve First Active and Last Inactive Dates per User

Given a table activity that tracks user activities, write a SQL query to retrieve the first active date and last inactive date for each user. Table Sc...

Data Manipulation (SQL/Python)SQL

Answer Dive Deep and Ownership in LP interview

Behavioral (Amazon LP): Dive Deep & Ownership The interviewer will probe your prior work and may connect follow-ups to the technical discussion. Promp...

Behavioral & LeadershipDebuggingOwnership & Execution

121 people solved

Jan 22, 2026

Determine Old vs. New Users' Shop Visibility Changes

SHOP_VISIBILITY_HISTORY +----------+----------------+---------------------+-------------------+---------+ | user_id | user_signup_dt | action_timesta...

Data Manipulation (SQL/Python)

Pivot order-status counts

Pivot order-status counts Given an orders table (order_id, shopper_id, order_date, status, …), pivot the data so that each row is one shopper and each...

Coding & AlgorithmsArrays & Strings

Implement a sliding-window hit counter

Implement a hit counter that supports recordHit(timestamp) and getHits(pastSeconds). Use a fixed-size array to maintain a sliding time window (e.g., l...

Coding & AlgorithmsData Structure DesignArrays & Strings

Find top countries by population per continent

Table world_population - continent VARCHAR - country VARCHAR - population BIGINT Assume each row is a country’s latest population and (continent, coun...

Data Manipulation (SQL/Python)SQL

Compute grid shortest path with obstacles

You are given an m x n grid of integers where cells with value -1 represent obstacles and all other cells are traversable. Starting at (0, 0) and targ...

Describe CAP, distributed systems, multithreading experience

CAP Theorem, Distributed Systems Design Decisions, and Multithreading Context Provide a structured answer that both explains the concepts and shows ho...

System DesignConsistency & AvailabilityConcurrency

Design a Collaborative Todo List

Design a collaborative todo-list service — think shared lists where teammates add, edit, assign, reorder, and complete items, and see each other's cha...

System DesignReal-Time SystemsConsistency & Availability

Implement distinct islands and sliding maxima

Implement distinct islands and sliding maxima 1) Given a binary grid where 1 represents land and 0 represents water, count how many distinct island sh...

Learning from Wrong Data

Behavioral Prompt: Decision-Making With Bad or Misleading Data Tell me about a time you made a significant decision based on incorrect or misleading d...

Behavioral & LeadershipFailure & LearningAmbiguity & Decision Making

Explain and Implement Strings

Question What is a string in programming languages? Inside a struct string{} in Rust, what fields are stored and how would you design and implement on...

Maximize block fee with transaction selection

You are given N transactions. Each transaction has: - id (unique identifier) - size (positive integer) - fee (positive integer) You are building a blo...

Coding & AlgorithmsGreedy

Optimize password transform and discount scheduling

Optimize password transform and discount scheduling Part 1 — Transform to palindromic k-periodic string: Input: a lowercase string currentPassword and...

Coding & AlgorithmsArrays & StringsIntervals & Scheduling

Machine Learning Engineer

Implement an interactive CLI class with tests

Design and implement a command-line interactive application as a single class using OOP principles. The program should support commands: add <key> <va...

Coding & AlgorithmsLow-Level Design (OOP)Testing & Quality

269 people solved

Aug 13, 2025

Return top-3 content per category

Given a collection of items with fields (content_id, category, rating), implement top_k_by_category(items, k= 3) that returns, for each category, the ...

Data Manipulation (SQL/Python)

26 people solved

Aug 1, 2025

Tech Interview Questions

Design an extensible ticketing system

Manage Prompt and Model Behavior in Production

Implement automatic braking logic in Python

Explain C++ memory, types, and concurrency fundamentals

Retrieve First Active and Last Inactive Dates per User

Answer Dive Deep and Ownership in LP interview

Determine Old vs. New Users' Shop Visibility Changes

Pivot order-status counts

Implement a sliding-window hit counter

Find top countries by population per continent

Compute grid shortest path with obstacles

Describe CAP, distributed systems, multithreading experience

Design a Collaborative Todo List

Implement distinct islands and sliding maxima

Learning from Wrong Data

Explain and Implement Strings

Maximize block fee with transaction selection

Optimize password transform and discount scheduling

Implement an interactive CLI class with tests

Return top-3 content per category

Choose your next challenge

Blind 75

ML System Design

System Design Interview