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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
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
Applied Intuition logo
Applied Intuition
Hard
Software Engineer

Track simulations and report timeouts

You are implementing a monitoring component for many concurrent simulations. Each simulation produces a stream of event objects of the form: - sim_id ...

Coding & Algorithms
5
0
69 people solved
Dec 8, 2025
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
Snapchat logo
Snapchat
Hard
Software Engineer

Count ways to decode digit string

You are given a string s consisting of digits '0' to '9'. The string encodes a message using the following mapping: - '1' → A, '2' → B, ..., '26' → Z....

Coding & AlgorithmsDynamic Programming
16
0
114 people solved
Dec 8, 2025
Vercel logo
Vercel
Medium
Software Engineer

Design hit counter for last 5 minutes

You are launching a new webpage and need a last-minute server-side metric to track popularity in real time. Implement a hit counter that supports the ...

Coding & AlgorithmsData Structure DesignStacks & Queues
28
0
195 people solved
Jan 1, 2026
Pinterest logo
Pinterest
Hard
Software EngineerSenior+

Scheduling Four Apps at Once on Kubernetes and a Node-Feedback Scheduler Plugin

You are in a technical-depth interview for a senior backend infrastructure role on a team that runs its workloads on Kubernetes. After some discussion...

System DesignContainers & OrchestrationJob Scheduling & Workflows
2
0
27 people solved
Feb 15, 2026
xAI logo
xAI
Hard
Software Engineer Locked

Find kth element and sliding-window kth in stream

This question evaluates understanding of order statistics and selection in arrays as well as sliding-window stream processing, including maintaining k...

Coding & AlgorithmsSortingData Structure Design
10
0
155 people solved
Jan 22, 2026
DoorDash logo
DoorDash
Hard
Software Engineer

Debug a cache incident end-to-end

Incident Scenario: Elevated Latency and Surge in Cache Misses You are paged for elevated tail latency and a spike in cache misses in a microservice th...

Software Engineering FundamentalsDebuggingCaching
32
0
296 people solved
Sep 6, 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
Axon logo
Axon
Medium
Software Engineer

How did you handle an ethical issue?

Describe a time when you encountered an ethical issue at work. What was the situation, why was it ethically sensitive, what options did you consider, ...

Behavioral & LeadershipEthics & Responsibility
25
0
190 people solved
Mar 16, 2026
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
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
Medium
Software EngineerSenior+

Answer AI Safety Behavioral Prompts

You are preparing for the final "culture" / hiring-manager rounds of a Software Engineer interview at an AI-focused company (the context here is Anthr...

Behavioral & LeadershipEthics & ResponsibilityMotivation & Fit
50
0
357 people solved
Mar 2, 2026
Figure logo
Figure
Easy
Software Engineer

Design a Multimodal Training Data Pipeline

Design a backend system for collecting, filtering, and storing training data sent by many clients. Clients upload records that may include large media...

ML System Design
4
0
53 people solved
Apr 2, 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
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
Stripe logo
Stripe
Medium
Software Engineer Locked

Design a Merchant Ledger Service

This question evaluates system design skills related to modeling monetary values, transactional integrity, idempotency, auditability, concurrency cont...

System DesignPayments & LedgersDistributed Transactions & Idempotency
20
1
247 people solved
Oct 7, 2025
Yelp logo
Yelp
Easy
Data Scientist Locked

Estimate Experiment Duration with Power Analysis

Estimate A/B test sample size and duration for a binary metric. Connect alpha, power, baseline rate, and minimum detectable effect to traffic, trigger...

Analytics & Experimentation
2
0
19 people solved
Aug 27, 2026
Uber logo
Uber
Hard
Software Engineer

Check if each prefix forms 1..k permutation

You are given an integer array arr of length n that is a permutation of the numbers 1..n (each number appears exactly once), but in arbitrary order. F...

Coding & AlgorithmsArrays & Strings
27
0
276 people solved
Feb 11, 2026
Apple logo
Apple
Medium
Software Engineer

Zero out duplicates and sort an array

Coding question You are given an integer array arr of length about 75. - The data is not sorted. - The array may contain duplicate values. - You must ...

Coding & AlgorithmsSorting
26
0
231 people solved
Feb 12, 2026
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