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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
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
Anthropic logo
Anthropic
Medium
Software EngineerSenior+

Give a Credible Why-This-Organization Answer

Give a Credible Why-This-Organization Answer Answer a recruiter who asks why you want to join their mission-driven AI organization. Your response shou...

Behavioral & Leadership
5
0
41 people solved
Apr 24, 2026
Easy
Software EngineerNew Grad

Validate Nested Parentheses, Brackets, and Braces

Given a string s containing only (, ), [, ], {, and }, determine whether all brackets are correctly matched and nested. Return a Boolean. A closing br...

Coding & AlgorithmsStacks & QueuesArrays & Strings
1
0
13 people solved
Aug 31, 2026
Netflix logo
Netflix
Hard
Software Engineer

Design a File Backup System

Design a scalable file backup system. You are given access to basic file-system primitives such as listing directories, reading file metadata, reading...

System DesignFile & Media StorageSystem Design Fundamentals
29
0
251 people solved
Apr 11, 2026
Airwallex logo
Airwallex
Medium
Frontend Engineer

Name-Keyed Async Task Scheduler with Sequential Lanes, Cancel and Clear by Name

Create a task scheduler for asynchronous functions, built in the style of an event emitter. Each task is submitted under a name together with an async...

Software Engineering FundamentalsJavaScript & TypeScriptConcurrency
0
0
4 people solved
Aug 31, 2026
Waymo logo
Waymo
Easy
Data Scientist

Determine earliest collision among moving cars

You are given n cars moving over time. Each car has known initial state at time \(t=0\): - 1D case (straight road): - initial position \(x_i\) (mete...

Coding & AlgorithmsMath & Number Theory
48
0
365 people solved
Jan 17, 2026
Meta logo
Meta
Hard
Software Engineer Locked

Respond to Critical Feedback and Show the Change

Prepare a behavioral interview story about receiving critical feedback, evaluating the underlying concern, and making a concrete change. Show how late...

Behavioral & Leadership
2
0
53 people solved
Aug 3, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design an SSH-Based Cloud Development Environment

Design an SSH-accessed cloud development platform with persistent workspaces and scheduled build, test, and run tasks. Work through identity, host pla...

System Design
9
0
67 people solved
Jun 25, 2026
Stripe logo
Stripe
Medium
Software Engineer

Implement multi-part cost calculator

You are given a price catalog and a list of orders. Implement the following in any language (Python examples acceptable): Inputs - price_catalog: mapp...

Coding & Algorithms
23
0
173 people solved
Sep 6, 2025
Netflix logo
Netflix
Medium
Machine Learning Engineer

Implement Streaming Word Counter

Implement a class that records word frequencies from a stream of text. The class should support the following operations: 1. add_text(text: str) -> No...

Coding & Algorithms
5
0
61 people solved
Apr 22, 2026
Capital One logo
Capital One
Medium
Software Engineer Locked

Sort Matrix Diagonals By Their Values

Practice a matrix diagonal sorting problem that scans bottom-left to top-right diagonals and returns indexes ordered by their diagonal strings. The pr...

Coding & Algorithms
13
1
95 people solved
Jul 7, 2026
Oracle logo
Oracle
Medium
Software Engineer Locked

Design a Sliding-Hour Top-100 User Event Pipeline

Design a scalable event-time pipeline for the top 100 users in a trailing one-hour window. The answer compares batch and streaming choices, derives bu...

System Design
2
0
24 people solved
Sep 5, 2026
Tekion logo
Tekion
Medium
Software EngineerSenior+ Locked

Maximize Profit with at Most K Transactions

Practice maximizing stock-trading profit under a transaction cap, one-position rule, and exact chronological semantics.

Coding & Algorithms
2
0
22 people solved
Aug 13, 2026
Databricks logo
Databricks
Hard
Software Engineer

Design concurrent range-aware file caching client

Design concurrent range-aware file caching client System Design: High-throughput Client-side Ranged-read File Cache You are asked to design and specif...

System DesignCachingConcurrency
45
0
750 people solved
Aug 9, 2025
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design a Distributed Crossword Solver

This question evaluates competency in distributed systems design, scalable indexing and storage, parallel search and constraint-satisfaction reasoning...

System DesignSystem Design FundamentalsBacktracking & Recursion
37
0
689 people solved
May 9, 2026
Google logo
Google
Medium
Software Engineer

Maximize coins collected by tokens jumping +3

You are given a single-player board game represented by a string board of length N (1 ≤ N ≤ 100). Each character is one of: - '.': empty cell - 'T': a...

Coding & AlgorithmsGreedyArrays & Strings
14
0
139 people solved
Feb 13, 2026
Furtherai logo
Furtherai
Medium
Machine Learning EngineerSenior+

Build a Create/Execute Workflow Service With an AI Assistant: Plan, Implement, Verify

In a 45-minute coding session you are expected to use an AI coding assistant. With it, build a small service that creates and executes workflows. The ...

Software Engineering FundamentalsJob Scheduling & WorkflowsGraphs
0
0
5 people solved
Aug 30, 2026
Decagon logo
Decagon
Medium
Software Engineer Locked

Design Sliding-Window Average Tracker

This question evaluates design and implementation of a time-windowed tracking data structure, focusing on streaming aggregation, handling monotonic ti...

Coding & AlgorithmsData Structure DesignStacks & Queues
19
0
213 people solved
Jan 31, 2026
Amazon logo
Amazon
Medium
Applied Scientist Locked

Implement Stable Sigmoid, Softmax, and Scaled Dot-Product Attention

Implement numerically stable sigmoid, softmax, and single-head scaled dot-product attention using elementary arithmetic and loops. The discussion cove...

Machine LearningTransformers & AttentionML Coding
12
0
179 people solved
Jul 2, 2026
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