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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
Google logo
Google
Medium
Product Manager

YouTube Growth Bet for India: Launch Plan, North Star and Low-Uptake Playbook

You are a product manager on YouTube. Decide what YouTube should do for India: pick the opportunity you would pursue in the Indian market and justify ...

Product Design & StrategyProduct StrategyMetrics & KPIs
1
0
13 people solved
Feb 10, 2026
Fannie Mae logo
Fannie Mae
Medium
Data Scientist

Design Test Cases for UI Change: Ensuring Quality and Functionality

Mission-Aware QA Collaboration: UI and Backend Testing You are interviewing for a Data Scientist role that collaborates closely with QA engineers and ...

Behavioral & Leadership
77
0
81 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Machine Learning Engineer Locked

Design a recommendation system from scratch

This question evaluates expertise in recommender systems and related competencies including machine learning-based candidate generation and ranking, d...

System DesignRecommendation SystemsRanking Models
10
0
128 people solved
Feb 12, 2026
Roku logo
Roku
Medium
Backend Engineer Locked

Explain concurrency and distributed fundamentals

This question evaluates understanding of concurrency and synchronization in multithreaded Java, Java hashing and equals/hashCode semantics, garbage co...

Software Engineering FundamentalsConcurrencyMemory Management
11
0
105 people solved
Feb 25, 2026
Boston Consulting Group logo
Boston Consulting Group
Medium
Data Scientist

Explain AUC, activations, ensembles, and imbalance

Machine Learning Metrics and Modeling Choices — Multi-part You are given model scores and binary labels for a small dataset and asked to compute ROC A...

Machine LearningModel EvaluationML Fundamentals
20
0
141 people solved
Oct 13, 2025
Tubi logo
Tubi
Medium
Data Scientist

Compute daily net users from event logs

Given an event log, write SQL to compute, for the target date 2025‑09‑01 ("today"), the counts of new users, retained users, churn users, and net user...

Data Manipulation (SQL/Python)
5
0
38 people solved
Oct 13, 2025
Uber logo
Uber
Medium
Software Engineer

Count paths with prime-ending jumps

You are given an integer n representing the top of a staircase, where you start at step 0 and want to land exactly on step n. In one move, you may jum...

Coding & Algorithms
5
0
64 people solved
Jan 15, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design an SSH-Based Cloud Development Environment

Design an SSH-accessed cloud development platform with persistent workspaces and scheduled build, test, and run tasks. Work through identity, host pla...

System Design
10
0
78 people solved
Jun 25, 2026
MongoDB logo
MongoDB
Hard
Software EngineerSenior+

Design a scalable resume search system

Design a scalable resume search system System Design: Resume Search Platform Context A recruiting company needs a platform where applicants can upload...

System DesignSearch & Feed SystemsSystem Design Fundamentals
14
0
279 people solved
Jul 15, 2025
Cognitiv logo
Cognitiv
Hard
Software Engineer Locked

Reason About Duplicate Data and Scaling in Spark

Explain how to define and remove duplicate data in Spark, then scale the pipeline as volume and traffic increase. Candidates must translate business i...

Software Engineering Fundamentals
4
0
54 people solved
Jul 28, 2026
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Design an Event Booking System

This question evaluates system architecture, distributed systems, data modeling, concurrency control for seat inventory, transactional integrity for b...

System Design
4
0
79 people solved
Feb 22, 2026
Grammarly logo
Grammarly
Easy
Software Engineer Locked

Recover a Rooted Tree from Depth-Annotated Preorder

Reconstruct an ordered rooted tree from preorder text in which hyphen count encodes depth and values may have multiple digits. Return a canonical nest...

Coding & Algorithms
14
0
94 people solved
Jul 6, 2026
Shopify logo
Shopify
Medium
Machine Learning Engineer

Explain motivations, resume, and logistics

HR Screen: Behavioral Overview for a Machine Learning Engineer Context: You are preparing for an HR screen for a Machine Learning Engineer role. The r...

Behavioral & LeadershipMotivation & Fit
8
0
100 people solved
Sep 6, 2025
Morgan Stanley logo
Morgan Stanley
Medium
Data Scientist

How do you escape the circle?

A dog runs continuously along the boundary of a circle of radius 1 at speed 4. You start at an arbitrary point strictly inside the circle and can run ...

Coding & Algorithms
6
0
82 people solved
Dec 8, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Find lowest common ancestor in tree

You are given the root of a binary search tree (BST) and two distinct nodes p and q that are guaranteed to exist in the tree. Task (BST case): - Find ...

Coding & Algorithms
8
0
78 people solved
Nov 19, 2025
Google logo
Google
Hard
Software Engineer Locked

Find minimum threshold enabling grid path

This question evaluates a candidate's understanding of grid pathfinding, reachability under constraints, and algorithmic optimization, focusing on ski...

Coding & AlgorithmsBinary SearchGrids & Matrices
15
1
215 people solved
Feb 11, 2026
TikTok logo
TikTok
Hard
Data Scientist

Design Real-Time Credit Card Fraud Detection System

Design a Real-Time Credit-Card Fraud Detection System You are designing a real-time fraud detection system for an online payments platform that proces...

Machine LearningML System DesignSupervised Learning
29
0
131 people solved
Jul 12, 2025
J.P. Morgan logo
J.P. Morgan
Medium
Data ScientistNew Grad Locked

Implement KNN from Scratch

This question evaluates a candidate's understanding and practical implementation skills for instance-based supervised learning, specifically the k-nea...

Coding & Algorithms
5
0
55 people solved
Apr 7, 2026
Pitchbook logo
Pitchbook
Easy
Software Engineer

Implement Euclidean distance and k-nearest neighbors

You are working with points in an n-dimensional Euclidean space, where each point is represented as a list (or array) of numeric coordinates. Assume: ...

Coding & Algorithms
9
0
104 people solved
Oct 29, 2025
Pinterest logo
Pinterest
Medium
Data Scientist

Implement LRUCache with O(1) Operations and Thread Safety

Scenario High-traffic API needs constant-time eviction cache. Question Implement an LRUCache supporting get(key) and put(key,val) in O( 1). Describe ...

Coding & Algorithms
20
0
102 people solved
Jul 12, 2025
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