Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

12.1k

Companies

579

Updated

10.10.2026

12.1k Questions 579 Companies10.10.2026

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

Design a Concurrent, Memory-Bounded Tally Service

Design a tally service that records timestamped events and answers inclusive range-count queries, beginning with an exact baseline and evolving toward...

Software Engineering FundamentalsData Structure DesignConcurrency

Solve graph path, interval deletion, and robbery

Solve graph path, interval deletion, and robbery Part A — Optimal path with transport modes: You are given a directed weighted graph of a city. Each e...

Coding & AlgorithmsGraphsDynamic Programming

Discuss logistics and compensation

Discuss logistics and compensation Behavioral Screen: Logistics and Preferences Context: You are interviewing for a Software Engineer role. The interv...

Behavioral & Leadership

Data Scientist Locked

How validate a driving simulation is realistic?

This question evaluates skills in statistical validation of simulations, distributional comparison between real and simulated driving data, scenario-s...

Analytics & ExperimentationHypothesis Testing

Machine Learning Engineer Locked

Explain LLM post-training methods and tradeoffs

This question evaluates a practitioner's knowledge of LLM post-training methods—including supervised fine-tuning, preference optimization approaches (...

Machine LearningFine-Tuning & Alignment TechniquesAI Safety & Alignment

Simulate stack traces from logs

Given a list of log entries describing function calls, each formatted as "<id> <event> <timestamp>" where event ∈ {START, END} and timestamps are inte...

Coding & AlgorithmsStacks & Queues

Debug and test a Python function in venv

Consider the Python snippet below. """ import math def accumulate(nums, start=0, cache={}): total = start for n in nums: if n % 2 == 0: nums.appen...

Coding & AlgorithmsDebuggingTesting & Quality

Software Engineer Locked

Design a concurrent latency percentile tracker

This question evaluates understanding of concurrent data structures, thread-safety, time-windowed metrics aggregation, and percentile computation for ...

Software Engineering FundamentalsData Structure DesignConcurrency

Implement an in-memory SQL-like table

Implement a simplified in-memory SQL-like database for a single table. You should support the following operations on a table with a fixed schema (a l...

Coding & AlgorithmsData Structure Design

Software Engineer Locked

Implement a Unique Lines Command

This question evaluates mastery of file I/O, streaming algorithms, stateful line processing, and memory-efficient handling of large inputs, situating ...

Implement A* Maze Search

Implement maze pathfinding in C++. You are given an m x n grid where '.' is an open cell, '#' is a wall, S is the start, and T is the target. You may ...

Coding & AlgorithmsGrids & MatricesGraphs

Software EngineerIntern Locked

Match people to questions using tags and priorities

This question evaluates competencies in bipartite matching and combinatorial optimization, along with practical data-structure design for scalable tag...

Coding & AlgorithmsGraphs

Explain ROC-AUC vs PR-AUC tradeoffs

Question You trained a binary classifier that outputs predicted probabilities. Compare ROC-AUC and PR-AUC (the latter usually reported as Average Prec...

Machine LearningModel Evaluation

Machine Learning Engineer Locked

Navigate Conflict, Compromise, and a Revealed Weakness

Build a coherent set of behavioral examples covering engineering conflict, disagreement with a manager, a weakness revealed at work, and when to pair ...

Behavioral & Leadership

Machine Learning EngineerSenior+ Locked

Design a Game Recommendation System

This question evaluates mastery of designing scalable end-to-end machine learning recommendation systems, including candidate generation, multi-stage ...

ML System DesignRecommendation SystemsRanking Models

Software EngineerSenior+

Design a Reliable URL Shortening Service

Design a Reliable URL Shortening Service Design a service that accepts a long URL and returns a short URL, then redirects short-code requests to the s...

Software Engineer Locked

Design CRUD APIs with async jobs

This question evaluates a candidate's ability to design backend services that combine CRUD operations with asynchronous background job processing, emp...

System DesignSystem Design FundamentalsAPI Design

Software EngineerSenior+

Return the Vertical Traversal of a Binary Tree

Return the Vertical Traversal of a Binary Tree Problem Implement verticalTraversal(nodeValues, left, right, root) -> columns. Node root is at row 0, c...

Site Reliability Engineer

Solve Five Core Python Data-Processing Exercises

Solve Five Core Python Data-Processing Exercises Implement and explain: repeat a message n times with blank lines; square a list then reverse it; Fizz...

Software Engineering Fundamentals

Count connected land components in a grid

You are given a 2D grid of characters where: - '1' represents land - '0' represents water A group of land cells forms an island if they are connected ...

Coding & AlgorithmsGrids & Matrices

116 people solved

Nov 21, 2025

Tech Interview Questions

Design a Concurrent, Memory-Bounded Tally Service

Solve graph path, interval deletion, and robbery

Discuss logistics and compensation

How validate a driving simulation is realistic?

Explain LLM post-training methods and tradeoffs

Simulate stack traces from logs

Debug and test a Python function in venv

Design a concurrent latency percentile tracker

Implement an in-memory SQL-like table

Implement a Unique Lines Command

Implement A* Maze Search

Match people to questions using tags and priorities

Explain ROC-AUC vs PR-AUC tradeoffs

Navigate Conflict, Compromise, and a Revealed Weakness

Design a Game Recommendation System

Design a Reliable URL Shortening Service

Design CRUD APIs with async jobs

Return the Vertical Traversal of a Binary Tree

Solve Five Core Python Data-Processing Exercises

Count connected land components in a grid

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