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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
Glean logo
Glean
Medium
Data Scientist

Product Case: Define Success Metrics for a Product, Using Enterprise Search as Example

In a hiring-manager interview for a data scientist role, one question was a product case: how would you measure the success of a product? The report d...

Analytics & ExperimentationMetrics & KPIsExperiment Design (A/B Testing)
1
0
37 people solved
Sep 30, 2026
Google logo
GoogleMicrosoftAmazon

Also asked at Amazon, Box, Meta, Bloomberg, Oracle

Medium
Software Engineer

Remove the Last Input Edge on the Unique Cycle

Problem edges describes a connected undirected graph formed by adding one previously absent edge to a tree on vertices 1..n. Return an edge whose remo...

Coding & AlgorithmsGraphs
2
0
23 people solved
Google logo
Google
Medium
Software Engineer

Sliding-Window Mean After Removing the Largest K Values

For every contiguous window of a fixed size, remove the largest k values by multiplicity and compute the mean of the remaining values. Process sliding...

Coding & AlgorithmsTwo Pointers & Sliding WindowData Structure Design
17
0
282 people solved
Sep 1, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+

Behavioral: a task outside your responsibilities and a very tight timeline

A technical phone screen began with a short behavioral segment. The interviewer asked two standard questions, one after the other, and expected a spec...

Behavioral & LeadershipOwnership & ExecutionAmbiguity & Decision Making
5
0
52 people solved
Sep 30, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Design and Implement a Shopping Cart Object Model for an Online Store

An object-oriented design exercise that asks you to model and implement a shopping cart for an online store, covering adding, updating and removing pr...

Software Engineering FundamentalsLow-Level Design (OOP)
14
0
115 people solved
Sep 5, 2026
Akuna Capital logo
Akuna Capital
Medium
Quantitative Researcher

Minimum-Electricity Grid Path Moving Only Right or Down

Each cell of a rectangular grid holds the amount of electricity, a non-negative integer, that is used when a path passes through that cell. A path sta...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices
0
0
14 people solved
Sep 28, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Count Events in a Trailing 15-Minute Window with a Fixed-Size Ring Buffer

Implement an event counter that returns how many events occurred in the trailing 15 minutes, using a fixed-size ring buffer of per-second buckets so m...

Software Engineering FundamentalsData Structure Design
6
0
124 people solved
Sep 20, 2026
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Resume ML Project Deep Dive: Loss, Training Data, Features, Architecture, Cold Start

Choose a machine learning project from your resume. The interviewer drills into it in detail and asks, in turn, about the loss function, how the train...

Machine LearningProject Deep DiveFeature Engineering
4
0
47 people solved
Sep 12, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Medium
Quantitative Trader

Probability You Picked the Strongest Cat Given Your Cat Lost the Race

Three cats run a race, and exactly one of them wins. Their probabilities of winning are $x$, $y$ and $z$, with $x + y + z = 1$. Before the race you pi...

Statistics & MathProbability
1
0
27 people solved
Sep 19, 2026
Harvey logo
Harvey
Hard
Software Engineer Locked

Merge Exact-Word Highlights and Rank Their Citations

Highlight exact whole-word source phrases in text, merge overlapping regions, and attach distinct citations in the required global ranking order. Hand...

Coding & AlgorithmsIntervals & Scheduling
118
5
975 people solved
Jul 27, 2026
Snowflake logo
Snowflake
Medium
Software Engineer Locked

Find the Minimum Bus Fleet with Station Constraints

Minimize a bus fleet when trips have origin and destination stations, tracking when buses become available at the correct departure station.

Coding & AlgorithmsIntervals & SchedulingHeaps & Priority Queues
13
0
164 people solved
Sep 5, 2026
Airbnb logo
Airbnb
Hard
Software Engineer Locked

Design a Stateful Working Hours Register

Design a stateful employee working-hours register that handles badge events, completed time, position rankings, delayed promotions, historical pay, an...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines
68
0
521 people solved
Jul 20, 2026
Virtu Financial logo
Virtu Financial
Medium
Quantitative TraderNew Grad

Why Quant Trading, Why Virtu, and How You Would Choose Between Competing Offers

In a 30-minute recruiter screen for a graduate quantitative trader role at Virtu Financial, the recruiter asked three motivation questions before a br...

Behavioral & LeadershipMotivation & Fit
0
0
5 people solved
Oct 21, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Build an Order-Exception Microservice with Explicit Refund Policies

Design and demonstrate a local service for missing or delayed orders, with explicit refund rules, duplicate handling, and auditable decisions.

Software Engineering FundamentalsPayments & LedgersAI-Assisted Development
8
0
158 people solved
Sep 10, 2026
Remitly logo
Remitly
Medium
Software Engineer Locked

Top Up Accounts Below a Threshold from Surplus Accounts and Log Each Transfer

Given a mapping of account IDs to balances and a threshold, move money from accounts above the threshold into accounts below it until every account re...

Software Engineering FundamentalsGreedyPayments & Ledgers
5
0
93 people solved
Sep 7, 2026
Spotify logo
Spotify
Hard
Software Engineer

Shortest Path Through an Obstacle Grid

Given an m by n grid of zeros and ones, a start cell, and a target cell, return the length of a shortest path that never enters a cell containing one....

Coding & AlgorithmsGrids & Matrices
0
0
9 people solved
Oct 18, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Implement follow graph with snapshots and recommendations

Design and implement an in-memory “social network” component that supports following/unfollowing, point-in-time (snapshot) queries, and a simple recom...

Coding & AlgorithmsData Structure DesignGraphs
117
0
1723 people solved
Feb 2, 2026
ByteDance logo
ByteDance
Medium
Software Engineer

Select the K-th Largest Value from an Unsorted Array Without a Heap

Given an unsorted array of integers and an integer k, return the k-th largest value in the array. Duplicates count separately: the answer is the value...

Coding & AlgorithmsSorting
5
0
77 people solved
Oct 10, 2026
Databricks logo
Databricks
Hard
Software Engineer Locked

Design a Music Playlist Service

Design a playlist service for creating lists, adding or removing tracks, reordering items, and reading deterministic playback order. Examine retry-saf...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
51
0
463 people solved
Jul 25, 2026
xAI logo
xAI
Medium
Machine Learning EngineerNew Grad Locked

Find All Faulty GPU Nodes with Parallel Group Tests That Cannot Share Nodes

An algorithm design question about finding every faulty GPU node when the only tool is a group test that fails if any node in the set is bad. Tests ne...

Software Engineering FundamentalsMath & Number Theory
4
0
78 people solved
Sep 5, 2026
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