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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
Cisco logo
Cisco
Medium
Software Engineer

Solve max-subarray, min-unique, and grid-jump

1) Given an integer array nums, find a contiguous subarray with the maximum possible sum. Return (maxSum, startIndex, endIndex). If multiple subarrays...

Coding & Algorithms
5
0
89 people solved
Sep 6, 2025
Harvey logo
Harvey
Medium
Software Engineer

Design a constrained in-memory file system

Design an in-memory hierarchical file system. Implement: 1) addFile(String path): Given a UNIX-style absolute path like "/path/to/somewhere/file.txt",...

Coding & AlgorithmsData Structure DesignTrees
31
0
457 people solved
Jul 27, 2025
Microsoft logo
Microsoft
Hard
Software EngineerSenior+

Explain OOP design and API rollout

In one interview round, the discussion focused on practical backend engineering rather than pure algorithms. Discuss both of the following: 1. You are...

Software Engineering FundamentalsLow-Level Design (OOP)API Design
10
0
148 people solved
Apr 7, 2026
Shopify logo
Shopify
Medium
Machine Learning Engineer

Design and implement a word-guessing game

Word-Guessing Game (Wordle-like) — Design and Implement Context Build a small, standalone command-line application that lets a user guess a secret wor...

System DesignSimulation & State MachinesArrays & Strings
73
0
496 people solved
Aug 12, 2025
Stripe logo
Stripe
Medium
Software Engineer

Discuss challenging project examples

Discuss challenging project examples Behavioral and Leadership Interview Prompt — Software Engineer (Onsite) You will be assessed on problem-solving, ...

Behavioral & Leadership
17
0
112 people solved
Jul 29, 2025
DoorDash logo
DoorDash
Medium
Product Manager

OpenTable Product Design: Improving the Diner Journey After a Table Is Reserved

You are a product manager working on OpenTable, the online restaurant reservation service. Design a product that improves the diner's experience after...

Product Design & StrategyProduct Design & ImprovementMetrics & KPIs
1
0
15 people solved
Jan 25, 2026
Thumbtack logo
Thumbtack
Medium
Data Scientist

Implement TF–IDF with sparse matrices

Implement TF–IDF from Scratch (Python + NumPy/SciPy) You are given a list of documents (plain strings). Implement a TF–IDF vectorizer from scratch — n...

Coding & AlgorithmsML CodingFeature Engineering
23
0
190 people solved
Oct 13, 2025
Google logo
Google
Medium
Product Manager

Explaining AI's Role in Google's Revenue Engine, Defenses and Future Growth

In a Google product manager interview, you are asked why artificial intelligence matters so much to Google: how it serves the company's business strat...

Product Design & StrategyProduct StrategyAI Product Management
0
0
8 people solved
Jul 13, 2026
Disney logo
Disney
Medium
Data Scientist

Write complex SQL for streaming funnels

You are analyzing a Disney/Hulu product funnel with events captured in a single table. Write ANSI-SQL (Snowflake/BigQuery compatible) to answer the su...

Data Manipulation (SQL/Python)
2
0
44 people solved
Oct 13, 2025
Instacart logo
Instacart
Medium
Backend EngineerSenior+ AI

Clarify and Implement Search Filters for a Library Table

Clarify and Implement Search Filters for a Library Table An existing library-management application shows a book table that users find too long and di...

Software Engineering Fundamentals
9
0
81 people solved
May 2, 2026
CVS Health logo
CVS Health
Medium
Data Scientist

Create Views, Insert, and Update Correctly

Treat “today” as 2025-09-01. Use the schema and sample data below to write SQL for each part. Schema: customers(cust_id INT PRIMARY KEY, name TEXT, re...

Data Manipulation (SQL/Python)
4
0
35 people solved
Oct 13, 2025
Rippling logo
Rippling
Medium
Software Engineer

Extend rules for trip-level aggregates and outputs

Extend rules for trip-level aggregates and outputs Extend Rules Engine: Aggregate Trip-Level Policies Context You previously built an expense policy e...

System DesignLow-Level Design (OOP)
23
0
292 people solved
Aug 7, 2025
Pinterest logo
Pinterest
Hard
Machine Learning EngineerSenior+ Locked

Design a real-time home feed ranker

This question evaluates an engineer's ability to design scalable, low-latency real-time recommendation and ranking systems that integrate personalizat...

ML System DesignRecommendation SystemsPersonalization
21
0
166 people solved
Jan 12, 2026
Siemens logo
Siemens
Medium
Machine Learning EngineerSenior+ Locked

Discuss Post-Training Ownership, Failure, and Disagreement

Prepare post-training interview stories about end-to-end project ownership, a failed effort, and a substantive disagreement resolved through evidence.

Behavioral & LeadershipProject Deep DiveConflict & Collaboration
3
0
26 people solved
Sep 4, 2026
Google logo
Google
Medium
Software Engineer Locked

Design a rolling hit counter API

This question evaluates proficiency with data structures for time-window aggregation and understanding of time/space trade-offs when counting events w...

Coding & AlgorithmsData Structure DesignStacks & Queues
13
1
156 people solved
Jan 6, 2026
Google logo
Google
Easy
Data Scientist Locked

Design an A/B test for search ranking

This question evaluates a data scientist's competency in online experimentation, causal inference, product analytics, and operational metrics engineer...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
63
0
520 people solved
Feb 7, 2026
Amazon logo
Amazon
Hard
Software Engineer Locked

Explain the Most Complex Problem You Solved

Present the most complex problem you have solved by breaking down its dimensions, key technical decisions, failure and scale considerations, and evide...

Behavioral & Leadership
3
0
31 people solved
Aug 11, 2026
Apple logo
Apple
Hard
Software Engineer

Design video platform and catalog system

System Design: Two Independent Systems You are asked to design two large-scale systems. For each system, provide: - Scope and key requirements - Exter...

System DesignFile & Media StorageSearch & Feed Systems
14
0
183 people solved
Sep 6, 2025
DoorDash logo
DoorDash
Medium
Machine Learning Engineer

How would you target promotions to grow consumers?

ML / Growth Scenario You own a system that sends promotion offers (e.g., "$10 off", "free delivery") to consumers to increase growth. Prompt Design an...

Machine LearningPersonalizationCausal Inference
21
1
208 people solved
Oct 17, 2025
Liftoff logo
Liftoff
Medium
Software Engineer

Parse and expand an IPv6 address

Implement an IPv6 address parser/normalizer. You are given a string s that may represent an IPv6 address using standard notation: - Up to 8 groups (“h...

Coding & Algorithms
9
0
72 people solved
Feb 26, 2026
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