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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
Nextdoor logo
Nextdoor
Medium
Software Engineer Locked

Design a Neighborhood Newsfeed System

This question evaluates a candidate's ability to design a scalable, privacy-preserving neighborhood social feed system, testing competencies in distri...

System DesignSystem Design FundamentalsSearch & Feed Systems
6
0
122 people solved
May 31, 2026
Oracle logo
Oracle
Medium
Backend EngineerSenior+ Locked

Design a Distributed Rate Limiter

Design a distributed per-tenant rate limiter that supports bursts, policy changes, and multiple regions while comparing common algorithms and defining...

System Design
4
0
34 people solved
Aug 10, 2026
Optiver logo
Optiver
Medium
Software Engineer Locked

Design a Multi-Level Expiring Item Store

Design a class with initialization, store, and retrieve operations for items placed into ordered storage levels. Make the API or object boundaries exp...

Software Engineering FundamentalsData Structure Design
38
0
415 people solved
Jul 23, 2026
Anthropic logo
Anthropic
Hard
Software Engineer

Design distributed median and mode

Design a Distributed System for Global Median and Global Mode at Massive Scale Context You are designing a distributed analytics system that computes ...

System DesignPartitioning & Consistent HashingBatch & Stream Processing
212
0
1889 people solved
Sep 6, 2025
eBay logo
eBay
Medium
Software Engineer Locked

Search a Rotated Sorted Array in One Binary-Search Pass

Search for a target in a rotated strictly increasing array using one binary-search pass. The exercise focuses on interval invariants, identifying an o...

Coding & Algorithms
3
0
35 people solved
Jul 26, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Implement Social Follow Recommendations

This question evaluates graph data structure design and traversal, set-based aggregation and ranking logic, and the ability to justify data structure ...

Coding & Algorithms
15
0
113 people solved
May 9, 2026
Optiver logo
Optiver
Hard
Software EngineerSenior+ Locked

Design a News Subscription Processing Engine

Design a news subscription engine that receives items, manages subscriptions, and publishes each item to matching subscribers. Clarify predicate and d...

Software Engineering FundamentalsMessaging & Event-DrivenDistributed Transactions & Idempotency
22
0
356 people solved
Jul 19, 2026
Ramp logo
Ramp
Hard
Software Engineer

Track Users From Flight History

You are given an unsorted list of flight records. Each record contains departure_airport, departure_time, arrival_airport, arrival_time, and user_id. ...

Coding & AlgorithmsArrays & StringsSorting
15
0
227 people solved
Jan 17, 2026
Apple logo
Apple
Medium
Software Engineer Locked

Minimal Unique Word Abbreviations

This question evaluates a candidate's ability to design a string-processing algorithm involving iterative refinement and conflict resolution among gro...

Coding & Algorithms
8
1
112 people solved
Jun 30, 2026
Wells Fargo logo
Wells Fargo
Hard
Data ScientistIntern

Using, Evaluating and Adapting a Pretrained Large Language Model

You are given a pretrained large language model. How would you use it, how would you evaluate it, and how would you adapt it to your needs? The interv...

Machine LearningLLM ApplicationsFine-Tuning & Alignment Techniques
0
0
1 people solved
Oct 6, 2026
J.P. Morgan logo
J.P. Morgan
Medium
Software Engineer Locked

Java Core Deep Dive: Concurrent Collections and Java 8 Features

This question evaluates a candidate's depth of knowledge of the Java standard library, covering thread-safety mechanics in concurrent collections and ...

Software Engineering Fundamentals
3
0
69 people solved
Jun 9, 2026
Amazon logo
Amazon
Medium
Software Engineer

Compute minimum delivery days

Question Given N distribution centers numbered 1..N and an orderCityList of length M where orderCityList[i] denotes the city that the i-th order must ...

Coding & Algorithms
17
1
165 people solved
Aug 4, 2025
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Implement a Consistent Hash Ring

Design a consistent hash ring with virtual nodes for stable key-to-backend routing and limited remapping after membership changes. Specify sorted toke...

Software Engineering FundamentalsPartitioning & Consistent HashingBinary Search
18
0
132 people solved
Jul 10, 2026
Snapchat logo
Snapchat
Medium
Data Scientist Locked

Count Users Whose First Daily Event Is App Launch

Write PostgreSQL to count users whose first event of each day is an app launch, grouped by operating system and device. Practice deterministic window ...

Data Manipulation (SQL/Python)
2
0
29 people solved
Aug 13, 2026
Amazon logo
Amazon
Medium
Software EngineerNew Grad

Design a pizza ordering system

Design the core object-oriented model for a pizza ordering system used by a small restaurant. The system should allow customers to: - browse a menu of...

Software Engineering FundamentalsLow-Level Design (OOP)
16
1
272 people solved
Oct 24, 2025
Oracle logo
Oracle
Medium
Software Engineer

Contribute to a Complex Project

Contribute to a Complex Project Describe a complex project, your bounded responsibility within it, how dependencies were coordinated, and how your con...

Behavioral & Leadership
1
0
11 people solved
Aug 18, 2026
OpenAI logo
OpenAI
Medium
Machine Learning Engineer Locked

Design an OOD detection system

This question evaluates a candidate's competency in ML system design, specifically out-of-distribution detection, production monitoring, interpretabil...

ML System DesignModel Monitoring & DriftModel Evaluation
36
0
288 people solved
Dec 14, 2025
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design a Hosted Notebook Platform

This question evaluates system design skills around stateful compute orchestration, including control-plane versus data-plane separation, workspace li...

System DesignSystem Design FundamentalsSandboxing & Isolation
297
0
3198 people solved
Apr 12, 2026
Citadel logo
Citadel
Medium
Software Engineer

Design a Thread-Safe Shared Counter

Design and implement a per-key call counter: a component that tracks how many times each distinct key has been seen. The API is a single method, for e...

Software Engineering FundamentalsConcurrencyData Structure Design
31
1
481 people solved
Mar 7, 2026
Databricks logo
Databricks
Medium
Software Engineer Locked

Partition a Target String by Source Substrings

This question evaluates understanding of string algorithms and optimal partitioning, specifically substring matching and minimizing the number of cont...

Coding & Algorithms
15
0
124 people solved
May 14, 2026
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