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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 testimonial
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_ testimonial
_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"

Chris testimonial
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 testimonial
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."

Jake testimonial
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 testimonial
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."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
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."

Andy testimonial
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 testimonial
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."

Shruti testimonial
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 testimonial
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."

Bianca testimonial
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 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
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 testimonial
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_ testimonial
_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"

Chris testimonial
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 testimonial
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."

Jake testimonial
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 testimonial
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."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
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."

Andy testimonial
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 testimonial
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."

Shruti testimonial
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 testimonial
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."

Bianca testimonial
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 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
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
Snowflake logo
Snowflake
Hard
Software Engineer

Sum of the Node Values on a Binary Tree's Boundary

Picture walking around the outside of a binary tree, starting at the root: you go down the left edge, along the leaves at the bottom from left to righ...

Coding & AlgorithmsTrees
0
0
6 people solved
Jul 4, 2026
Netflix logo
Netflix
Medium
Machine Learning Engineer

Explain tokenization and Transformer variants

Tokenization and Transformer Architecture Deep Dive You are asked to explain common tokenization approaches and modern Transformer design choices used...

Machine LearningTransformers & AttentionNatural Language Processing
11
0
153 people solved
Aug 13, 2025
Amazon logo
Amazon
Medium
Frontend Engineer Locked

Navigate a Tight Deadline and an Ambiguous Engineering Project

Prepare concrete engineering stories about delivering under a tight deadline and moving forward when key information was missing. The prompt focuses o...

Behavioral & Leadership
1
0
29 people solved
Jul 7, 2026
Databricks logo
Databricks
Medium
Software Engineer Locked

Design KV store with sliding-window QPS metrics

This question evaluates designing an in-memory key–value store with sliding-window throughput metrics, testing competencies in data structures, concur...

System DesignData Structure Design
25
0
315 people solved
Nov 8, 2025
Apple logo
Apple
Medium
Machine Learning Engineer Locked

Debug a PyTorch U-Net shape mismatch

This question evaluates proficiency in PyTorch model implementation, convolutional output shape arithmetic, channel configuration, and debugging of U-...

Coding & AlgorithmsML CodingComputer Vision
19
0
192 people solved
Mar 1, 2026
Perplexity logo
Perplexity
Hard
Software Engineer

Implement resilient LLM provider pool

System Design Task: Resilient Multi‑Provider LLM Client Library Context You are designing a client library used by backend services to call external L...

ML System DesignLLM ApplicationsAPI Integration & HTTP Clients
14
0
238 people solved
Aug 13, 2025
Pinterest logo
Pinterest
Easy
Data Scientist Locked

How to evaluate a new Carousel feature

This question evaluates a data scientist's competence in experimentation design, measurement framework formulation, metric definition, and diagnostic ...

Analytics & ExperimentationExperiment Design (A/B Testing)Metric Diagnostics
12
0
149 people solved
Feb 1, 2026
Tesla logo
Tesla
Medium
Machine Learning Engineer

Implement and vectorize NumPy Conv2D

Implement a 2D convolution operation from scratch using NumPy only (no TensorFlow or PyTorch). Assume NCHW input shape (N, C_in, H_in, W_in) and weigh...

Data Manipulation (SQL/Python)
5
0
59 people solved
Sep 6, 2025
Akuna Capital logo
Akuna Capital
Hard
Data Scientist

Find minimum swaps to sort array with duplicates

Problem Given an integer array nums of length n that may contain duplicate values, you may perform swaps where you choose any two indices i and j and ...

Coding & AlgorithmsSortingGraphs
10
0
207 people solved
Dec 27, 2025
Vercel logo
Vercel
Medium
Software Engineer

Design hit counter for last 5 minutes

You are launching a new webpage and need a last-minute server-side metric to track popularity in real time. Implement a hit counter that supports the ...

Coding & AlgorithmsData Structure DesignStacks & Queues
29
0
198 people solved
Jan 1, 2026
Expedia logo
Expedia
Hard
Software EngineerSenior+ Locked

Maximum Sum Skyline

This question tests algorithmic problem-solving with array optimization under a mountain (single-peak) shape constraint. It evaluates practical applic...

Coding & Algorithms
2
0
32 people solved
Jun 17, 2026
Coinbase logo
Coinbase
Medium
Software Engineer

Design account system with cashback

Design account system with cashback System Design: Account Management with Transfers, Payments, and Cashback You are to design and implement an in-mem...

System DesignData Structure DesignConcurrency
101
1
443 people solved
Jul 29, 2025
Databricks logo
Databricks
Hard
Software Engineer Locked

Design a multi-threaded synchronous log writer

This question evaluates a candidate's understanding of concurrent programming, durable I/O, synchronization primitives, ordering guarantees, and syste...

Software Engineering FundamentalsConcurrencyOperating Systems
33
0
600 people solved
Feb 12, 2026
Meta logo
Meta
Medium
Data Engineer

Design a scalable dimensional model

Design a Dimensional Model for Transactional Analytics (Concrete Example Included) You are building a star-schema in a cloud data warehouse for near r...

System DesignDimensional ModelingStorage & Sharding
18
0
132 people solved
Sep 6, 2025
Google logo
Google
Medium
Data ScientistSenior+

When do you use mixed-effects models

You are modeling a user outcome (e.g., watch time or retention) across many countries and many users. Observations are nested (multiple days per user;...

Machine LearningRegression & Statistical Modeling
23
0
241 people solved
Nov 24, 2025
Plaid logo
Plaid
Medium
Software Engineer

Explain project scope, timeline, and delegation

10–15 Minute Project Deep Dive (Behavioral and Leadership in a Technical Screen) Context You are asked to present a concise, slide-driven deep dive on...

Behavioral & LeadershipProject Deep DiveOwnership & Execution
23
1
307 people solved
Sep 6, 2025
xAI logo
xAI
Medium
Software Engineer

Fix race condition in concurrent deposit

Concurrent bank account debugging (thread safety) You are given a simple BankAccount object that is used concurrently from multiple threads. Two depos...

Software Engineering FundamentalsConcurrency
24
1
254 people solved
Dec 15, 2025
Anthropic logo
Anthropic
Medium
Software Engineer

Design an LLM-based binary classifier

Design a Binary Text Classifier Using Only a Log-Probability Scoring Helper Context You are building a binary text classifier without fine-tuning. You...

ML System DesignLLM ApplicationsPrompt Engineering
38
0
711 people solved
Sep 6, 2025
Asana logo
Asana
Medium
Software Engineer Locked

Design a Testable 2048 Game Engine

Design a testable 2048 game engine with correct movement, merging, restart, and game-over behavior. Explore clean object boundaries, injected tile gen...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines
15
0
135 people solved
Jul 2, 2026
Confluent logo
Confluent
Medium
Software Engineer

Solve constrained monster traversal

Solve constrained monster traversal You are given a directed graph with n rooms labeled 0..n-1; each room i contains a monster with health hp[i] ≥ 0. ...

Coding & AlgorithmsGraphsBacktracking & Recursion
11
0
184 people solved
Jul 27, 2025
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