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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
J.P. Morgan logo
J.P. Morgan
Easy
Software Engineer Locked

Design an Auditable Internal AI Chatbot

Design an auditable internal AI chatbot that retrieves only documents each user may access, limits retained context, resists prompt injection, and rec...

System Design
3
0
54 people solved
Aug 1, 2026
Okta logo
Okta
Medium
Backend EngineerSenior+

Build and Review a Configurable Node.js Token-Bucket Rate Limiter

Build a Node.js Express application that reads a configuration file and exposes an API governed by a token-bucket rate limiter. Then explain the imple...

Software Engineering FundamentalsRate LimitingCode Quality & Maintainability
0
0
3 people solved
Oct 5, 2026
Cursor logo
Cursor
Medium
Software Engineer Locked

Design an In-Memory Transactional Key-Value Store

This Cursor software engineering question evaluates how a candidate designs a transactional in-memory key-value store with clear API semantics. It is ...

Software Engineering FundamentalsTransactions & Isolation
92
0
789 people solved
Jul 2, 2026
ZipHQ logo
ZipHQ
Medium
Backend Engineer Locked

Find Bugs in an LRU Cache

Find the behavioral defects in a Java LRU cache built with LinkedHashMap and provide minimal failing tests. Correct access ordering, update recency, l...

Software Engineering FundamentalsDebuggingData Structure Design
19
1
158 people solved
Jul 4, 2026
Hudson River Trading logo
Hudson River Trading
Hard
Software EngineerNew Grad

Implement Order Modification Feature

You are given an existing C++ trading system with a client/server architecture. The current system already supports two request types: - AddOrder(orde...

Coding & AlgorithmsCode Quality & MaintainabilityAPI Design
27
0
225 people solved
Mar 13, 2026
Google logo
Google
Hard
Machine Learning Engineer

Explain Importance Sampling in LLM Training

Explain Importance Sampling in LLM Training Define importance sampling and explain how it supports estimation under one distribution using samples fro...

Machine Learning
3
0
55 people solved
Aug 14, 2026
Hudson River Trading logo
Hudson River Trading
Easy
Software EngineerIntern Locked

Check Root-To-Leaf Target Sums In A Binary Tree

Practice a binary tree path-sum interview problem that asks whether any root-to-leaf path reaches a target value, including empty trees, single-node t...

Coding & Algorithms
14
0
111 people solved
Jul 3, 2026
Anthropic logo
Anthropic
Hard
Software Engineer

Explain AI Safety and Weigh Advanced AI Benefits and Risks

Explain what AI safety means to you, what can happen when AI is used improperly, and what you consider the largest potential benefits and risks of adv...

Behavioral & LeadershipEthics & ResponsibilityAI Safety & Alignment
2
0
39 people solved
Aug 19, 2026
Voleon logo
Voleon
Easy
Data Scientist Locked

Analyze a Regression Dataset and Build a Safe File-Processing Utility

A combined data-analysis and Python engineering interview. Candidates must diagnose a regression dataset, choose suitable validation and metrics, then...

Data Manipulation (SQL/Python)Regression & Statistical ModelingFeature Engineering
6
1
132 people solved
Jun 1, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Software Engineer

Linux Host and Filesystem Fundamentals

Linux Host and Filesystem Fundamentals Clarifying Questions to Ask - Which Linux distribution and shell should be assumed? - Are privileged commands a...

Software Engineering Fundamentals
10
0
108 people solved
Apr 30, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Site Reliability Engineer Locked

Reason About Unix Signals, Zombies, and Process Reaping

Explain Unix signal delivery, the practical difference between SIGTERM and SIGKILL, how zombie processes arise, and how parents or PID 1 reap them dur...

Software Engineering Fundamentals
5
0
48 people solved
Aug 16, 2026
C3 AI logo
C3 AI
Medium
Data ScientistIntern

Explain the Margin View of Boosting Classification

Explain the Margin View of Boosting Classification A multiple-choice question offers these explanations for why boosting is used in classification: it...

Machine LearningSupervised LearningML Fundamentals
1
0
11 people solved
Sep 15, 2026
Amazon logo
Amazon
Medium
Applied ScientistSenior+

From Early NLP Embeddings to Modern LLM Embeddings

From Early NLP Embeddings to Modern LLM Embeddings Explain how natural-language processing moved from sparse lexical representations to learned embedd...

Machine Learning
3
0
54 people solved
Aug 15, 2026
Google logo
Google
Easy
Software Engineer Locked

Count Rectangle Coverage on a Grid

Apply many inclusive rectangular increments to a square grid and return the final coverage count for every cell. The exercise emphasizes upper-bound e...

Coding & AlgorithmsGrids & Matrices
70
3
564 people solved
Jul 21, 2026
Crusoe logo
Crusoe
Easy
Software Engineer Locked

Implement Interval Overrides and Top-K Strings

This question evaluates interval manipulation and merging for half-open time ranges with overrides, plus frequency-counting and top-k string selection...

Coding & Algorithms
27
0
188 people solved
May 2, 2026
Qualified Health logo
Qualified Health
Hard
Software Engineer

Stream LLM Output While Committing Reliable DAG Results

A workflow runs an LLM task whose output must appear incrementally in an interactive client. Downstream DAG nodes, however, require the complete struc...

System DesignReal-Time SystemsJob Scheduling & Workflows
0
0
5 people solved
Sep 30, 2026
Jump Trading logo
Jump Trading
Hard
Software Engineer Locked

Design a Compact Columnar File Format

Design a simplified Parquet-like file format and specify write and read operations. Make the API or object boundaries explicit, then cover invariants,...

Software Engineering FundamentalsStorage Formats & Partitioning
8
0
105 people solved
Aug 6, 2026
Siemens logo
Siemens
Medium
Machine Learning EngineerSenior+

Explain SFT, DPO, PPO, and the Role of KL Regularization

Explain the objectives and practical differences among supervised fine-tuning (SFT), Direct Preference Optimization (DPO), and PPO-based language-mode...

Machine LearningFine-Tuning & Alignment TechniquesReinforcement Learning
2
0
19 people solved
Sep 4, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer Locked

Simulate Infection Spread on a Grid

This question evaluates the ability to implement and reason about discrete-time, grid-based simulations with multi-state cells and neighbor-dependent ...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
19
0
213 people solved
May 11, 2026
Anthropic logo
Anthropic
Medium
Software Engineer AI Locked

Maximum-Length Unique-Character Subset

This question evaluates a candidate's ability to combine bitmasking with backtracking or subset enumeration to maximize a constraint over combinations...

Coding & Algorithms
12
0
119 people solved
Jun 23, 2026
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