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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
Verkada logo
Verkada
Medium
Software Engineer

Merge Sorted Arrays In Place

You are given two non-decreasing integer arrays. - A has length m + n. - The first m elements of A are valid sorted numbers. - The last n elements of ...

Coding & AlgorithmsSortingTwo Pointers & Sliding Window
17
0
162 people solved
Apr 2, 2026
Atlassian logo
Atlassian
Easy
Software Engineer Locked

Design a Data Stream Processor

This question evaluates the ability to design real-time data stream processing systems, testing competencies such as high-throughput ingestion, event ...

System Design
6
1
93 people solved
Feb 9, 2026
Databricks logo
Databricks
Hard
Software EngineerNew Grad

Implement firewall matching with CIDR rules

Implement a simple IPv4 firewall rule matcher. Problem You are given an ordered list of firewall rules. Each rule has: - an action: ALLOW or DENY - a ...

Coding & AlgorithmsBit ManipulationNetworking
21
2
336 people solved
Dec 10, 2025
Snapchat logo
Snapchat
Medium
Software Engineer

Design a Multi-Region CI/CD System with Separate Control and Data Planes

Design a CI/CD system in which the control plane is separated from the data plane. The system takes code changes through build and test, produces rele...

System DesignCI/CD & DeploymentFault Tolerance & Failover
1
0
9 people solved
Jul 1, 2026
Omnissa logo
Omnissa
Medium
Software Engineer Locked

Design an Extensible Multi-Channel Notification System

Design an extensible notification system with clean channel, template, policy, provider, and delivery-attempt abstractions. The solution shows how to ...

System Design
2
0
19 people solved
Sep 4, 2026
Snowflake logo
Snowflake
Hard
Software Engineer

Design a multi-tenant quota system

Design a Global Multi-Tenant Quota Service (Single Global Quota per User) Context Multiple upstream products (e.g., Drive, Photos) share a single glob...

System DesignRate LimitingDistributed Transactions & Idempotency
52
0
683 people solved
Sep 6, 2025
Chariot logo
Chariot
Medium
Software Engineer

Explore an HTTP Maze

You are given an HTTP API that represents a maze-like forest. The entrance is available at GET /mirkwood. Each location in the forest is identified by...

Coding & Algorithms
7
0
88 people solved
Apr 7, 2026
OpenAI logo
OpenAI
Hard
Software EngineerSenior+ Locked

Design a Slack-like real-time messaging system

This question evaluates a candidate's competency in designing scalable, fault-tolerant real-time messaging systems, including message persistence and ...

System DesignReal-Time Systems
64
0
447 people solved
Feb 12, 2026
Liftoff logo
Liftoff
Hard
Machine Learning Engineer

Key-Value Store with Checkpoint Rollback and Ambiguity-Aware Prefix Reads

Implement an in-memory key-value store with string keys and string values. Besides ordinary writes, it must support two features: - Checkpoints. The c...

Software Engineering FundamentalsData Structure DesignTrees
0
0
8 people solved
Jul 6, 2026
Optiver logo
Optiver
Medium
Software Engineer

Design a Balloon Festival Simulator

Implement a class BalloonFestival with the following API and rules. Goal Track hot air balloons (yours and competitors), evolving wind fields, and bal...

Coding & AlgorithmsData Structure DesignSimulation & State Machines
47
0
541 people solved
Jul 27, 2025
Pinterest logo
Pinterest
Medium
Machine Learning EngineerSenior+ Locked

Solve Expression and Tree-List Problems

This question evaluates competency in string expression generation under a custom left-to-right evaluation rule and in-place binary search tree manipu...

Coding & AlgorithmsBacktracking & RecursionTrees
23
0
167 people solved
Feb 21, 2026
Cockroach Labs logo
Cockroach Labs
Medium
Software Engineer

Present and Defend an End-to-End Project You Owned: Architecture, Choices, Challenges

This is a choose-your-own system design round: there is no assigned system. Pick a core project that you owned end to end at a previous job, present i...

System DesignProject Deep DiveSystem Design Fundamentals
0
0
8 people solved
Jul 7, 2026
Robinhood logo
Robinhood
Medium
Software EngineerSenior+ Locked

Design authorization and audit logging systems

This question evaluates competency in designing secure authorization and audit logging systems, including access-control models (RBAC/ABAC/hybrid), po...

System DesignAuthentication & AuthorizationObservability
27
0
243 people solved
Jan 22, 2026
Amazon logo
Amazon
Hard
Software Engineer AI

Diagnose Return Eligibility Scoring Bugs

You are working on an e-commerce return-eligibility service. For each return request, the service computes a risk score using signals such as: - how m...

Software Engineering FundamentalsDebugging
9
0
153 people solved
Jan 12, 2026
Amazon logo
Amazon
Medium
Software EngineerNew Grad

Create a Binary Tree from Parent-Child Descriptions

Problem Build a binary tree from parent-child descriptions. Each description is [parentValue, childValue, isLeft], where isLeft is 1 for a left child ...

Coding & Algorithms
4
0
41 people solved
Mar 12, 2026
Google logo
Google
Medium
Data Scientist

Analyze data duplication effects in linear regression

OLS With Duplicated Observations: Estimator, Variance, and Inference Pitfalls Context: You have the linear model y = Xβ + ε with full-rank X ∈ ℝ^{n×p}...

Statistics & MathRegression & Statistical ModelingHypothesis Testing
27
0
304 people solved
Oct 13, 2025
Confluent logo
Confluent
Medium
Software Engineer Locked

Design RSS Feed and Temporary Mail

This question evaluates skills in large-scale system design, covering API design, ingestion and normalization pipelines, caching and freshness trade-o...

System DesignSystem Design FundamentalsAPI Design
11
0
158 people solved
Jan 28, 2026
Stripe logo
Stripe
Medium
Software Engineer Locked

Process multi-currency payments with fees

This question evaluates a software engineer's competency in precise integer arithmetic and rounding semantics, multi-currency FX conversion with basis...

Coding & Algorithms
9
1
101 people solved
Nov 2, 2025
Atlassian logo
Atlassian
Medium
Software Engineer Locked

Design a simple greeting-card web app

This question evaluates a candidate's ability to design a minimal web application architecture for an MVP greeting-card service, covering frontend/bac...

System Design
8
0
107 people solved
Feb 11, 2026
Robinhood logo
Robinhood
Medium
Software Engineer

Design a Task Scheduler and Executor

Design a Task Scheduler and Executor Design a service that accepts tasks for future or recurring execution and dispatches them to workers. Constraints...

System DesignJob Scheduling & WorkflowsDistributed Transactions & Idempotency
16
1
132 people solved
Apr 21, 2026
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