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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
Microsoft logo
MicrosoftGoogleAmazon

Also asked at Amazon, Meta, Bloomberg

Easy
Software Engineer

Match the Diabetes Prefix at a Space-Delimited Condition Boundary

Problem Return patient_id, patient_name and conditions for patients with a condition code beginning DIAB1. Conditions contains zero or more codes sepa...

Data Manipulation (SQL/Python)SQL
0
0
6 people solved
Datadog logo
Datadog
Easy
Software EngineerSenior+ Locked

Engineering Manager Interview: Your Technical Contribution and an Annoying Teammate

A hiring manager conversation for an engineering manager role: introduce yourself, explain your own technical contribution to a project you led, and d...

Behavioral & LeadershipLeadership & InfluenceConflict & Collaboration
6
0
66 people solved
Sep 5, 2026
Close logo
Close
Medium
Software EngineerSenior+

Rate Your Own Python Skills on a 1-10 Scale and Justify the Number

A recruiter screen for a senior or staff software engineering role opens with introductions to the company and the position. The recruiter then asks y...

Behavioral & LeadershipMotivation & FitProgramming Languages
0
0
7 people solved
Oct 16, 2026
ByteDance logo
ByteDance
Hard
Machine Learning EngineerNew Grad

Minimum Number of Rooms to Host a Set of Possibly Overlapping Meetings

You are given the start and end times of a set of meetings. Every meeting must be held in a room, and a room can host only one meeting at a time. Retu...

Coding & AlgorithmsIntervals & SchedulingHeaps & Priority Queues
3
0
29 people solved
Aug 20, 2026
Atlassian logo
Atlassian
Medium
Software Engineer Locked

Diagnose why a scaled system became slow

This question evaluates proficiency in diagnosing performance regressions in scaled production services, emphasizing observability, bottleneck identif...

System DesignReliability & SREObservability
70
0
573 people solved
Jan 22, 2026
Amazon logo
Amazon
Medium
Software EngineerNew Grad Locked

Recover from a Missed Deadline

Develop an honest missed-deadline story that traces the original commitment, early warning signs, stakeholder communication, and recovery choices. Com...

Behavioral & LeadershipFailure & LearningOwnership & Execution
38
0
614 people solved
Jul 15, 2026
Zoox logo
Zoox
Medium
Software Engineer Locked

Lane-Change Safety and Longitudinal Motion Simulation

This question tests practical application of kinematics, feedback control, and object-oriented design in a real-time simulation context. It evaluates ...

Coding & Algorithms
10
0
148 people solved
Jun 5, 2026
Roblox logo
Roblox
Medium
Software EngineerSenior+ Locked

Driving a Project Forward Despite Internal Opposition

This question evaluates a candidate's ability to drive initiatives and influence others without formal authority, a core competency in behavioral and ...

Behavioral & Leadership
8
0
95 people solved
Jun 10, 2026
Citadel logo
Citadel
Hard
Software Engineer

Compute Statistics from a Frequency Array

Compute Statistics from a Frequency Array You receive an array freq of length 256. freq[v] is the number of times integer value v occurs in an implici...

Statistics & MathProbability
24
0
241 people solved
Mar 29, 2026
Optiver logo
Optiver
Hard
Software Engineer Locked

Analyze an Unfair-Coin Bankroll Game

A player starts with a bankroll of 10. Explain the assumptions and derivation clearly, check edge cases, and show how the result changes when those as...

Statistics & MathProbabilityPuzzles & Brainteasers
28
0
222 people solved
May 24, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Easy
Data Scientist Locked

Compute Conditional Age Probability Among Cyclists

Compute a conditional probability from a complete age-by-exercise contingency table. The answer selects the biking row as the conditioned population, ...

Statistics & Math
3
0
24 people solved
Aug 16, 2026
DoorDash logo
DoorDash
Medium
Product Manager

DoorDash Rewards Program That Keeps Delivery Customers Coming Back

You are interviewing for a product manager role at DoorDash. Design a loyalty program for DoorDash customers whose purpose is better retention: keepin...

Product Design & StrategyGrowth & MonetizationMetrics & KPIs
0
0
9 people solved
Sep 20, 2026
Google logo
GoogleMetaMicrosoft

Also asked at Microsoft, Oracle, SoFi

Hard
Software Engineer

Select the Most Disjoint Palindromic Substrings of Sufficient Length

Problem Choose non-overlapping contiguous substrings of lowercase s. Every selected substring must be a palindrome and have length at least k. Return ...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
0
0
9 people solved
Google logo
GoogleMetaBloomberg

Also asked at Bloomberg, Amazon, TCS, Microsoft, Zoho

Easy
Software Engineer

Find the Repeated and Missing Values in a Square Grid

Find the Repeated and Missing Values in a Square Grid You are given a 0-indexed n * n integer grid whose values lie in [1,n^2]. Exactly one value a ap...

Coding & AlgorithmsArrays & Strings
0
0
9 people solved
Amazon logo
AmazonBloombergMicrosoft

Also asked at Microsoft, Google, Meta, Wayfair

Medium
Software Engineer

Find the Final Boarding Person before the Bus Limit Is Exceeded

Problem Return person_name for the last person who boards in turn order without exceeding the bus capacity of 1000 kilograms. Boarding follows the que...

Data Manipulation (SQL/Python)SQL
0
0
7 people solved
Decagon logo
Decagon
Medium
Software Engineer Locked

Design an AI gateway

This question evaluates a candidate's competence in designing service-oriented architectures for integrating multiple external large language model pr...

System DesignFault Tolerance & FailoverLLM Applications
42
0
469 people solved
Jan 11, 2026
xAI logo
xAI
Hard
Software Engineer

Design a follower push-notification system

Design a notification system for a social product: - When a user publishes a new post, the system should send push notifications to that user’s follow...

System DesignReal-Time SystemsMessaging & Event-Driven
33
0
276 people solved
Feb 7, 2026
Attentive logo
Attentive
Medium
Software Engineer Locked

Evaluate a Scoped Lisp Expression

Implement an evaluator for a small Lisp-like language with addition, multiplication, sequential let bindings, nested scopes, and variable shadowing. T...

Coding & Algorithms
6
0
64 people solved
Sep 2, 2026
DoorDash logo
DoorDash
Medium
Product Manager

Choose the Product Bet That Cuts DoorDash's Late-Delivery Rate

You are a product manager at DoorDash, the marketplace that connects customers with restaurants and other merchants and with the couriers (Dashers) wh...

Product Design & StrategyPrioritization & TradeoffsExperiment Design (A/B Testing)
0
0
8 people solved
Sep 15, 2026
Qualified Health logo
Qualified Health
Hard
Software Engineer

Ingest and Serve RAG Sessions with Up to 200 Documents

Design ingestion and serving for an enterprise Agent/RAG conversation system. A session can upload up to 200 documents, including PDF, DOCX, TXT, and ...

System DesignRetrieval-Augmented GenerationCaching
2
0
20 people solved
Sep 8, 2026
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