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

Google

Hard

Machine Learning Engineer

Group Consecutive Piano Notes into Hand Positions and Assign Fingers

A pianist plays a melody with one hand. Notes are integers, where consecutive integers are adjacent keys. The hand's five fingers cover five adjacent ...

Coding & AlgorithmsArrays & Strings

Software EngineerSenior+

Rotate a Matrix by Any Multiple of 90 Degrees, In Place Where the Shape Allows

Rotate a 2-D integer matrix by a given angle. The core case is a square n × n matrix turned 90 degrees clockwise in place: rearrange the values inside...

Coding & AlgorithmsGrids & Matrices

Design a Real-Time Multiplayer Typing Race with Typo Freezes and Fair Matchmaking

Design an online typing race game. A race has 2 to 8 players. When a race starts, the game generates a passage of text and every player types it; the ...

System DesignMultiplayer Game SystemsDistributed Coordination

Locate Vehicles through a Boolean Square-Occupancy Oracle

You can call ifVehicleInSquare(lat_min,lon_min,side_size), which returns whether at least one vehicle lies in that square. Design a way to find vehicl...

Software Engineering FundamentalsTreesBacktracking & Recursion

Parse Parent-Child Task Records and Render Them as a Connector Tree

You receive a list of task records and must rebuild the hierarchy of tasks and subtasks they describe, then print it as a text tree. The specification...

Software Engineering FundamentalsTrees

Software EngineerSenior+

Design Historical Driver Rates and Constant-Time Delivery Cost Totals

Design a Python model for a food-delivery company using Unix timestamps and dictionaries for driver rates and delivery records. Support rate updates w...

Software Engineering FundamentalsLow-Level Design (OOP)Data Structure Design

Software EngineerIntern

Count Tree Nodes Greater Than Every Cross-Subtree Pair Sum and Product

Given a binary tree of integers, count the nodes whose value is larger than every sum and every product that can be formed by taking one value from th...

Coding & AlgorithmsTrees

Software EngineerIntern

Count Failing, Passing, and Honor-Roll Scores

Given test scores, return three counts in this order: failing, passing without honor roll, and honor roll. A score below50 fails. A score above80 is h...

Coding & AlgorithmsArrays & Strings

Stack with Constant-Time Minimum over a Sequence of Operations

Design a stack that supports pushing an element, popping the top element, reading the top element, and reading the smallest element currently in the s...

Coding & AlgorithmsData Structure DesignStacks & Queues

Explain Why You Want to Work at Anthropic

Explain Why You Want to Work at Anthropic A recruiter asks, “Why Anthropic?” Give a concise answer that connects a current, publicly verifiable aspect...

Behavioral & Leadership

1190 people solved

Aug 29, 2026

Easy

Machine Learning EngineerIntern

Implement a Decision Tree Classifier and a Bagging Ensemble from Scratch

Implement a decision tree classifier from scratch, then use it to build a bagging ensemble. This was the second of two from-scratch ML algorithm imple...

Machine LearningML CodingSupervised Learning

Calculate the Percentage of Highly Active Users by Country

Calculate the Percentage of Highly Active Users by Country The impressions table has these columns: | Column | Meaning | |---|---| | impression_id | I...

Data Manipulation (SQL/Python)SQL

Six Timed Behavioral Prompts: AI Tools, Debugging, Teamwork, Explaining, Goals, Quality

This is a recorded (one-way) video interview with six behavioral questions. For each question you have 1 minute to prepare and 3 minutes to record you...

Behavioral & LeadershipOwnership & ExecutionAI-Assisted Development

Control Distributed Smart Devices and Display Live Power Usage

Design a system that receives instructions to reduce electricity usage and sends them to smart devices across different locations. Handle devices that...

System DesignSystem Design FundamentalsMessaging & Event-Driven

Software EngineerSenior+

Track Dish Ratings and Report the Top-Rated Dish in Each Cuisine

A rating tracker keeps a rating for every dish on a menu, and each dish belongs to exactly one cuisine. Ratings change over time, and at any moment th...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues

Extensible Logger with Pluggable Filter, Truncate, Uppercase and Array Handlers

Build a simple logging utility for an application. The core requirement is that the Logger supports several different log handlers, and that new handl...

Software Engineering FundamentalsLow-Level Design (OOP)

Look Up a Book Title Typed with Missing or Extra Spaces

A library holds a list of book titles. Given a title typed by a user, decide whether that title is in the library. The typed title may have extra spac...

Software Engineering FundamentalsString AlgorithmsDynamic Programming

Machine Learning Engineer Locked

Hand-Written Gradients: Prefix-Product Backward Pass and Stable Cross-Entropy

Write gradients by hand: the forward and backward pass of the prefix-product operation, in linear time and without division so inputs may contain zero...

Machine LearningML CodingArrays & Strings

Data Engineer Behavioral: Proud System, Scaling, Stack Choices, Stakeholders, Messy Data

A hiring-manager conversation of about 45 minutes for a machine learning data engineer role on a team that works heavily with image data. The manager ...

Behavioral & LeadershipProject Deep DiveCommunication & Stakeholders

Software EngineerNew Grad

Fix a Django Ticketing Order Confirmation Flow: Holds, Seat Counts and Redis

This task comes from the project-debugging section of an online assessment. You are given an existing Django ticketing project with documentation and ...

Software Engineering FundamentalsDebuggingTransactions & Isolation

100 people solved

Oct 14, 2026

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Tech Interview Questions

Group Consecutive Piano Notes into Hand Positions and Assign Fingers

Rotate a Matrix by Any Multiple of 90 Degrees, In Place Where the Shape Allows

Design a Real-Time Multiplayer Typing Race with Typo Freezes and Fair Matchmaking

Locate Vehicles through a Boolean Square-Occupancy Oracle

Parse Parent-Child Task Records and Render Them as a Connector Tree

Design Historical Driver Rates and Constant-Time Delivery Cost Totals

Count Tree Nodes Greater Than Every Cross-Subtree Pair Sum and Product

Count Failing, Passing, and Honor-Roll Scores

Stack with Constant-Time Minimum over a Sequence of Operations

Explain Why You Want to Work at Anthropic

Implement a Decision Tree Classifier and a Bagging Ensemble from Scratch

Calculate the Percentage of Highly Active Users by Country

Six Timed Behavioral Prompts: AI Tools, Debugging, Teamwork, Explaining, Goals, Quality

Control Distributed Smart Devices and Display Live Power Usage

Track Dish Ratings and Report the Top-Rated Dish in Each Cuisine

Extensible Logger with Pluggable Filter, Truncate, Uppercase and Array Handlers

Look Up a Book Title Typed with Missing or Extra Spaces

Hand-Written Gradients: Prefix-Product Backward Pass and Stable Cross-Entropy

Data Engineer Behavioral: Proud System, Scaling, Stack Choices, Stakeholders, Messy Data

Fix a Django Ticketing Order Confirmation Flow: Holds, Seat Counts and Redis

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