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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Pinterest logo
Pinterest
Hard
Software Engineer

Design a high-throughput distributed rate limiter

Question Design a high-throughput, distributed rate-limiting service that runs across multiple regions with low latency and burst tolerance. The servi...

System DesignRate LimitingPartitioning & Consistent Hashing
19
0
336 people solved
Sep 6, 2025
DoorDash logo
DoorDash
Medium
Machine Learning Engineer Locked

Design personalized restaurant search and recommendations

This question evaluates a candidate's expertise in designing scalable, personalized restaurant search and recommendation systems, including system arc...

System DesignRecommendation SystemsRetrieval & Candidate Generation
41
0
341 people solved
Feb 3, 2026
Anthropic logo
Anthropic
Hard
Machine Learning Engineer

Design a scalable service and model performance

System Design: Multi-Region, 50k QPS, p95 < 100 ms Context Design an online, read-heavy key-value service (for example, a user profile or feature look...

System DesignKey-Value StoresConsistency & Availability
15
0
319 people solved
Aug 14, 2025
Capital One logo
Capital One
Medium
Software Engineer Locked

Design a mobile banking app backend

This question evaluates a candidate's competency in designing secure, highly available backend architecture for financial services, including API and ...

System DesignPayments & LedgersDistributed Transactions & Idempotency
28
0
353 people solved
Feb 12, 2026
Databricks logo
Databricks
Hard
Software Engineer Locked

Find Path Between Fibonacci Tree Nodes

This question evaluates a candidate's ability to reason about recursive tree structures, map preorder indices to positions in a recursively defined Fi...

Coding & AlgorithmsTreesDynamic Programming
16
0
127 people solved
Feb 13, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Implement a Snapshot Set Iterator

Implement a data structure SnapshotSet<T> with the following interface: `java interface SnapshotSet<T> { void add(T e); void remove(T e); ...

Coding & AlgorithmsData Structure Design
41
0
344 people solved
Mar 13, 2026
Whatnot logo
Whatnot
Medium
Machine Learning Engineer

Design trending livestream discovery

Design a system for a live-commerce platform that surfaces trending livestreams to users. Assume an ML model for scoring trendiness or relevance alrea...

ML System DesignRecommendation SystemsReal-Time Systems
10
0
162 people solved
Jan 17, 2026
Squarepoint logo
Squarepoint
Medium
Software Engineer

Evaluate Linear Regression Assumptions and Fit Three Points

Evaluate Linear Regression Assumptions and Fit Three Points Discuss the assumptions behind ordinary least squares, how multicollinearity affects a fit...

Machine Learning
4
0
55 people solved
Apr 22, 2026
Reddit logo
Reddit
Hard
Data Scientist

Design a causal evaluation without A/B testing

Non-Randomized Launch Decision via Synthetic Control: Complete Analysis Plan You need to make a go/no-go decision for a high-impact feature that canno...

Analytics & ExperimentationCausal InferenceHypothesis Testing
10
0
187 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist

Evaluate Groupon's Impact on Restaurant's Profitability and Strategy

Evaluating a Groupon-Style Deal for a Restaurant You own a restaurant, and a Groupon-style deals website proposes selling discount vouchers for your v...

Analytics & ExperimentationBusiness Case AnalysisGrowth & Monetization
115
0
359 people solved
Jul 12, 2025
Expedia logo
Expedia
Hard
Software Engineer

Solve three interview coding problems

This interview report described three coding tasks: 1. Generate a run-length spoken sequence Start with s1 = "1". To build the next term, read the ...

Coding & AlgorithmsArrays & StringsBacktracking & Recursion
9
0
127 people solved
Jan 6, 2026
Shopify logo
Shopify
Easy
Software Engineer

Simulate rover movement on a grid

You are building a rover navigation simulator. The exercise is incremental: you implement a single rover on a 2D grid, then extend the design to many ...

Coding & AlgorithmsSimulation & State MachinesLow-Level Design (OOP)
75
1
652 people solved
Jan 27, 2026
Apple logo
Apple
Medium
Software Engineer

Reduce False Failures and Classify QA Outcomes

As a Software QA Engineer, how would you reduce false failures in a regression suite whose correct executions may not produce identical outputs? Then ...

Software Engineering FundamentalsTesting & QualityDebugging
3
0
26 people solved
Mar 27, 2026
Tesla logo
Tesla
Medium
Software Engineer

Design a contiguous segment allocator

Design an in-memory contiguous segment allocator over an array of n cells (indexed 0..n- 1), all initially free. Support two operations: 1) allocate(l...

Coding & AlgorithmsData Structure DesignIntervals & Scheduling
16
0
147 people solved
Sep 6, 2025
ByteDance logo
ByteDance
Hard
Software Engineer Locked

Build the Largest Allowed Number Below a Limit

Construct the greatest canonical decimal number below a very large limit using only a reusable set of allowed digits. It calls for string-based numeri...

Coding & Algorithms
2
0
31 people solved
Jul 21, 2026
Apple logo
Apple
Medium
Data Scientist

Design Siri-vs-GPT query routing

You are a Data Scientist at Apple designing a feature that decides whether a user's natural-language query should be routed to Siri or to a GPT-based ...

Machine LearningML System DesignModel Evaluation
16
0
192 people solved
Jan 4, 2026
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
11
0
114 people solved
Jun 14, 2026
Box logo
Box
Medium
Software Engineer

Identify and fix deadlock in locked code

Identify and fix deadlock in locked code Multithreaded Deadlock: Diagnose and Fix Context You have concurrent code that acquires multiple locks and oc...

System DesignConcurrencyDebugging
22
0
214 people solved
Aug 1, 2025
Google logo
Google
Hard
Software Engineer

Design quota enforcement for high concurrency

System Design: Quota Enforcement Service at Very High QPS Context You are designing a multi-tenant quota and rate-limiting service used by many backen...

System DesignRate LimitingAPI Design
17
0
172 people solved
Sep 6, 2025
Glean logo
Glean
Easy
Data Scientist

Compute DAU and rolling MAU with zero days

You have two tables in PostgreSQL: Tables users - user_id (STRING / INT, PK) - signup_date (DATE) logins - user_id (STRING / INT, FK → users.user_id) ...

Data Manipulation (SQL/Python)Metrics & KPIsSQL
8
0
100 people solved
Nov 10, 2025
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