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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
Waymo logo
Waymo
Medium
Software Engineer Locked

Respond to On-Call Pressure, Feedback, and Team Conflict

Tell an on-call story in which incomplete information and team disagreement complicated mitigation. Present detection, containment, recovery, and foll...

Behavioral & Leadership
2
0
34 people solved
Aug 10, 2026
Easy
Software EngineerIntern Locked

Count Failing, Passing and Distinction Scores from Percentage Thresholds

Given an array of student exam scores as percentages, count how many students failed with under 50, passed with 50 to 80 inclusive, or passed with dis...

Coding & AlgorithmsArrays & Strings
8
0
65 people solved
Sep 6, 2026
Jump Trading logo
Jump Trading
Hard
Software Engineer Locked

Design a Compact Columnar File Format

Design a simplified Parquet-like file format and specify write and read operations. Make the API or object boundaries explicit, then cover invariants,...

Software Engineering FundamentalsStorage Formats & Partitioning
10
0
135 people solved
Aug 6, 2026
Google logo
Google
Medium
Product Manager

Average or Median? Choosing the Summary Statistic for Google Search Metrics

You are interviewing for a product manager role on Google Search. The interviewer asks: when you summarize the metrics you care about, should you focu...

Analytics & ExperimentationMetrics & KPIsExperiment Analysis & Readout
0
0
11 people solved
Sep 1, 2026
Roblox logo
Roblox
Hard
Software Engineer

Design game matchmaking and waiting queue

Design a scalable game matchmaking and waiting-queue system You are designing the matchmaking system for a large real-time multiplayer game (think of ...

System DesignMultiplayer Game SystemsDistributed Coordination
98
2
682 people solved
Jul 15, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Evaluate a New Ads-Ranking Algorithm

Design an experiment for a new ads-ranking algorithm, including the primary metric, randomization unit, advertiser budget interference, and launch gua...

Analytics & Experimentation
5
0
116 people solved
May 22, 2026
Uber logo
Uber
Medium
Software Engineer Locked

Design a Highly Available URL Shortener

Design a production URL shortener with exact mapping guarantees, scalable redirects, caching, expiration, partitioning, and recovery.

System Design
7
1
55 people solved
Aug 22, 2026
Google logo
GoogleAmazonMetaMicrosoft

Also asked at Meta, Microsoft

Medium
Software Engineer

Optimal First-Player Stones With a Growing Take Limit

Problem Positive stone piles are arranged in a row. Alice starts, then players alternate taking the first X remaining whole piles, with 1 <= X <= 2*M ...

Coding & AlgorithmsDynamic Programming
1
0
9 people solved
Glean logo
Glean
Medium
Machine Learning Engineer

Find Earliest Train Route

You are given a discrete train timetable and need to find a valid route through the train network. Each train has an itinerary represented as a sequen...

Coding & Algorithms
24
0
233 people solved
Apr 23, 2026
Verkada logo
Verkada
Medium
Software Engineer Locked

Distribute a Large Matrix Transpose

Design a fault-tolerant distributed matrix transpose using bounded tiles, idempotent placement, retries, and verifiable completion.

System Design
8
0
79 people solved
Aug 14, 2026
Bloomberg logo
Bloomberg
Medium
Software Engineer Locked

Design A Real-Time VWAP Analytics Provider

Study a real-time market data system design problem for computing VWAP from high-volume trade ticks across many exchanges. The prompt covers feed hand...

System DesignTrading SystemsBatch & Stream Processing
20
0
322 people solved
Jun 5, 2026
Amazon logo
Amazon
Hard
Applied ScientistNew Grad

Explain Core ML Interview Concepts

You are in a phone screen for an applied scientist / machine-learning engineer role and are asked to verbally explain a set of machine-learning fundam...

Machine LearningML FundamentalsNeural Networks & Training
260
0
2135 people solved
Apr 27, 2026
Decagon logo
Decagon
Medium
Software Engineer

Compute exclusive CPU time from nested logs

You are given logs from a single-threaded CPU that runs n functions (IDs 0 to n-1). Each log entry is a string in the format: - "functionId:start:time...

Coding & AlgorithmsStacks & Queues
23
0
391 people solved
Mar 1, 2026
Okta logo
OktaAmazon
Hard
Software Engineer

Maintain a Priced Movie Loan Catalog

Problem Implement the persistent MovieRentingSystem class for n shops. Each entries row is [shop,movie,price], with at most one copy of a movie at a s...

Coding & AlgorithmsData Structure DesignSorting
2
0
16 people solved
Meta logo
Meta
Medium
Product Manager

How a Photo Message Travels in WhatsApp or Messenger: Upload, Encryption, Delivery

In a product manager interview at Meta, the interviewer tests your technical fluency with a familiar scenario: someone shares a picture in a chat app ...

System DesignTechnical Tradeoffs for PMsCryptography
1
0
10 people solved
Aug 23, 2026
Stitch logo
Stitch
Medium
Product Manager

Adding Configurable Rules and AI Steps to a Hard-Coded Workflow Engine

Picture a workflow system whose steps are defined in code and always run the same fixed, deterministic way. As a product manager, how would you approa...

System DesignAI Product ManagementTechnical Tradeoffs for PMs
0
0
7 people solved
Aug 15, 2026
Google logo
GoogleLinkedInMeta

Also asked at Meta, Amazon, Bloomberg, TCS

Easy
Software Engineer

Find the Next Strictly Larger Letter with Wraparound

Problem letters is sorted in nondecreasing order. Return its smallest letter strictly after target alphabetically. If none is larger, wrap to letters[...

Coding & AlgorithmsBinary Search
1
0
14 people solved
StackAdapt logo
StackAdapt
Easy
Machine Learning Engineer Locked

Explain Why a Geometric Mean Can Exceed Its Median

Derive the mean and a discrete median of a geometric waiting-time distribution on trials 1, 2, 3, and onward. See how its right tail can pull the mean...

Statistics & Math
8
0
126 people solved
Aug 10, 2026
Anthropic logo
AnthropicOpenAIApplied Intuition

Also asked at Applied Intuition, Meta, Amazon, Google, Microsoft

Hard
Software Engineer

Find Duplicate Files by Content

Problem You are given a list of directory descriptions. Each description contains a directory path followed by one or more file records of the form fi...

Coding & AlgorithmsArrays & StringsParsing & Interpreters
5
0
85 people solved
Google logo
Google
Medium
Software Engineer Locked

Minimize Direction Violations in a Directed Road Network

Find a route through a directed road network that minimizes travel against the original edge directions. Model forward and reverse traversal costs cor...

Coding & AlgorithmsGraphs
71
5
510 people solved
Jul 5, 2026
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