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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 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
Swiggy logo
Swiggy
Medium
Product Manager

Picking a Delivery Platform for a New Restaurant: Zomato vs. Swiggy

You are opening a new restaurant in India and need to decide whether to list it on Zomato or on Swiggy, the country's two largest food-delivery apps. ...

Product / Decision MakingMarket & Competitive AnalysisBusiness Case Analysis
0
0
11 people solved
May 20, 2026
Google logo
Google
Hard
Machine Learning Engineer

List regularization methods and trade-offs

Question: Compare Regularization Techniques and When to Use Them Context: You are interviewing for a machine learning engineering role and are asked t...

Machine LearningML FundamentalsNeural Networks & Training
23
0
205 people solved
Sep 6, 2025
DoorDash logo
DoorDash
Medium
Software Engineer

Debug a Random Dasher Registry

Debug a Random Dasher Registry A registry supports adding dashers and randomly selecting and removing one. It uses a dense array of dasher IDs plus a ...

Software Engineering Fundamentals
10
0
115 people solved
Apr 3, 2026
Anthropic logo
Anthropic
Hard
Software Engineer Locked

Design a batched inference API

This question evaluates competency in designing scalable, low-latency ML inference systems with dynamic batching, covering system architecture, reques...

ML System DesignMLOps & Model ServingAPI Design
11
0
127 people solved
Feb 8, 2026
Pinterest logo
Pinterest
Medium
Data Scientist

Design and Evaluate a Home Carousel

Pinterest is considering adding a horizontally scrollable carousel at the top of the Home feed, similar to Instagram Stories. The carousel may surface...

Analytics & ExperimentationMetrics & KPIsExperiment Design (A/B Testing)
11
0
175 people solved
Jan 14, 2026
Meta logo
Meta
Medium
Software Engineer

Design an ad click aggregation service

Design a backend service that ingests ad impression and click events and provides aggregated metrics. Requirements: - Ingest a high-volume stream of e...

System Design
6
0
89 people solved
Feb 25, 2026
Amazon logo
Amazon
Medium
Frontend EngineerNew Grad Locked

Predict JavaScript let and var Behavior

Predict exact JavaScript behavior for let and var by reasoning about block versus function scope, hoisting, temporal dead zones, redeclaration, and pe...

Software Engineering Fundamentals
3
0
66 people solved
Aug 22, 2026
Roblox logo
Roblox
Medium
Data Scientist

Implement streaming CTR with deduplication

Implement a Python function to compute streaming, per-campaign CTR over a sliding 24-hour window with click de-duplication and late-arriving events. R...

Coding & AlgorithmsBatch & Stream ProcessingArrays & Strings
14
0
144 people solved
Oct 13, 2025
xAI logo
xAI
Medium
Software Engineer

Design a Durable Key-Value Cache with File-System Persistence

Design and implement (at a discussion + light-code level — you will sketch the key functions but not run them) a durable in-memory key-value cache. Th...

System Design
12
0
127 people solved
Sep 21, 2025
OpenAI logo
OpenAI
Hard
Software Engineer Locked

A Project You Decided Not to Ship

This question evaluates judgment and ownership by asking about a project abandoned before release rather than one that shipped. It tests decision-maki...

Behavioral & LeadershipOwnership & ExecutionAmbiguity & Decision Making
12
0
121 people solved
Jun 14, 2026
Grammarly logo
Grammarly
Medium
Software Engineer Locked

Reverse a Singly Linked List

Reverse a finite singly linked list represented by nested two-item Python lists. Reuse the existing node objects without allocating replacements, and ...

Coding & Algorithms
7
0
47 people solved
Jun 19, 2026
Confluent logo
Confluent
Medium
Software EngineerSenior+

Solve Signature, File, and Queue Problems

Solve the following interview-style problems: 1. Function signature matching You are given a registry of function definitions. Each function has an...

Coding & AlgorithmsData Structure DesignOperating Systems
30
0
273 people solved
Feb 22, 2026
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Explain Overfitting and Transformer Attention

You are interviewing for a machine learning engineering role. Answer the following ML fundamentals questions clearly and compare different modeling se...

Machine LearningML FundamentalsTransformers & Attention
9
0
121 people solved
Apr 29, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Design an ML search system

Design an ML‑Powered Enterprise Document Search System Context You are designing a multi‑tenant enterprise search system that indexes documents from m...

ML System DesignSearch RelevanceEmbeddings & Vector Search
18
0
241 people solved
Sep 6, 2025
Rippling logo
Rippling
Medium
Software EngineerSenior+ Locked

Staff Engineer Hiring-Manager Round: Platform Ownership, AI Adoption, and Cross-Team Influence

This question evaluates a candidate's ability to narrate scope, ownership, and cross-team influence at the senior or staff engineering level, using a ...

Behavioral & LeadershipProject Deep DiveLeadership & Influence
20
0
180 people solved
Jun 13, 2026
Discord logo
Discord
Hard
Software EngineerSenior+

Implement User Sessionization From Event Stream

You are building a backend data-processing component that consumes a stream of newline-delimited JSON events. Each event represents a user sending a m...

Coding & Algorithms
19
0
207 people solved
Dec 16, 2025
Tubi logo
Tubi
Medium
Machine Learning Engineer

Implement K-Means and compare with GMM

Implement K-Means clustering from scratch for a dataset X of shape (n_samples, n_features) and a target number of clusters k. Your implementation shou...

Coding & Algorithms
7
1
117 people solved
Jan 28, 2026
ByteDance logo
ByteDance
Hard
Site Reliability Engineer

Determine whether squares can fit

You are given an m x n rectangular grid and an array squares, where each value represents the side length of a square that must be cut from the origin...

Coding & Algorithms
5
0
93 people solved
Jan 27, 2026
Okta logo
Okta
Medium
Software Engineer

Build an Auth0-protected MCP server

Hands-on OA: Build an MCP server secured by Auth0 JWTs You are asked to build a local HTTP service that implements a minimal MCP (Model Context Protoc...

Software Engineering FundamentalsAuthentication & Authorization
36
0
275 people solved
Dec 15, 2025
Optiver logo
Optiver
Hard
Software Engineer

Design a subscription push service

Design a subscription push service Object-Oriented Design: Publish/Subscribe Notification Service Design an object-oriented publish/subscribe notifica...

System DesignMessaging & Event-DrivenLow-Level Design (OOP)
118
0
853 people solved
Jul 17, 2025
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