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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
Citadel logo
Citadel
Medium
Software Engineer

Explain JS types, Promises, Maps, WebSockets

Explain JS types, Promises, Maps, WebSockets JavaScript Types, Promises, Collections, and WebSocket Ordering You are interviewing for a software engin...

Software Engineering FundamentalsJavaScript & TypeScriptReal-Time Systems
19
0
137 people solved
Jul 26, 2025
Roblox logo
Roblox
Hard
Data Scientist

Apply Bayes' rule to compute posterior

A binary event \(A\) (e.g., “user is a payer” or “patient has a disease”) has prior probability \(P(A)\). You observe evidence \(B\) (e.g., a model pr...

Statistics & MathProbabilityBayesian Statistics
8
0
113 people solved
Nov 24, 2025
Meta logo
Meta
Medium
Software Engineer

Describe teamwork and stress handling

Describe teamwork and stress handling This Meta Software Engineer behavioral question asks you to demonstrate, with concrete examples, how you collabo...

Behavioral & LeadershipConflict & CollaborationOwnership & Execution
12
0
124 people solved
Aug 7, 2025
CVS Health logo
CVS Health
Medium
Data Scientist

Calculate Medical Claims by Age and Gender in 2024

MEMBERSHIP +----+----------+--------+---------+ | id | age_band | gender | zipcode | +----+----------+--------+---------+ | 1 | 18-25 | F | 9...

Data Manipulation (SQL/Python)
78
0
299 people solved
Aug 4, 2025
Google logo
Google
Medium
Data Scientist

Generate binomial matrix and column-normalize

Using Python with NumPy, generate a 100×100 matrix of Binomial(n = 10, p = 0.3) draws with a fixed random seed, then normalize each column so it sums ...

Data Manipulation (SQL/Python)
2
0
40 people solved
Oct 13, 2025
Atlassian logo
Atlassian
Medium
Data Scientist

Implement Real-Time Rate Limiting for Web Service Requests

Scenario A web service must throttle traffic from clients; you need to decide in real-time whether each incoming request should be served or rejected ...

Coding & Algorithms
23
0
107 people solved
Jul 12, 2025
Applied Intuition logo
Applied Intuition
Medium
Software Engineer

Design event timeout detector

Design and implement an event-timeout detector for a job scheduler. Inputs: a global timeout T and a stream of events; each event has {event_id, type ...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues
13
1
187 people solved
Jul 17, 2025
DoorDash logo
DoorDash
Medium
Software Engineer

Discuss integrity vs efficiency trade-offs

Discuss integrity vs efficiency trade-offs Behavioral: Balancing Integrity vs Speed Under Pressure (Software Engineer Onsite) Context You’re asked to ...

Behavioral & Leadership
7
0
98 people solved
Jul 15, 2025
Pinterest logo
Pinterest
Medium
Data Scientist

Implement DelayQueue with Idempotent Task Execution

Scenario Message broker offers DelayQueue where tasks execute at future timestamps, ensuring idempotency on duplicate IDs. Question Implement a delay ...

Coding & Algorithms
35
0
117 people solved
Jul 12, 2025
Netflix logo
Netflix
Easy
Data ScientistIntern Locked

Solve core probability and statistics questions

This question evaluates proficiency in core probability and statistical inference—covering Bayes' rule, causal controls in regression, the Central Lim...

Statistics & MathProbabilityHypothesis Testing
23
0
219 people solved
Jan 17, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Debug and harden a driver-selection component

This question evaluates debugging skills and data-structure implementation competency, focusing on heap/priority-queue behavior, constructor initializ...

Software Engineering FundamentalsDebuggingTesting & Quality
21
0
267 people solved
Jan 2, 2026
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Compute product of array except self

This question evaluates understanding of array manipulation, modular arithmetic, and algorithmic optimization by requiring computation of per-element ...

Coding & Algorithms
3
0
60 people solved
Feb 11, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Implement dasher active-time calculator

Implement a function that, given a dasherId, a local pay-period interval [startLocalDateTime, endLocalDateTime), and a list of order events of the for...

Coding & Algorithms
41
0
401 people solved
Sep 6, 2025
Capital One logo
Capital One
Medium
Data Scientist

How would you choose between shows?

You are a data scientist at a streaming company similar to Netflix or Hulu. Leadership wants a recommendation on whether to renew an existing series o...

Analytics & ExperimentationBusiness Case AnalysisCausal Inference
22
0
150 people solved
Jan 9, 2026
Microsoft logo
Microsoft
Medium
Data ScientistSenior+ Locked

Analyze an AI Product Pilot and Recommend Whether to Expand It

Analyze an AI product pilot and decide whether access should expand despite self-selection and a small sample. Build a metric tree for adoption, task ...

Analytics & Experimentation
3
0
54 people solved
Jun 29, 2026
Meta logo
Meta
Medium
Data Scientist

Calculate Distinct High-View Posts and Spam View-Prevalence

content_views | user_id | post_id | view_count | view_date | | 101 | 572 | 3 | 2021-11-01 | | 102 | 732 | 5 | 2021-1...

Data Manipulation (SQL/Python)
3
1
33 people solved
Aug 4, 2025
xAI logo
xAI
Hard
Machine Learning Engineer

Greedy Longest-Match Tokenizer for an LLM Data Pipeline

You are building a text pre-processing step for a large-language-model training pipeline. Before raw text can be fed into the model, it must be split ...

Coding & Algorithms
4
0
41 people solved
May 30, 2025
Netflix logo
Netflix
Hard
Software Engineer

Design viewport dedup for Netflix home page

Design viewport dedup for Netflix home page Design the Above-the-Fold Deduplicated Home Page Rendering Context You are designing the initial viewport ...

System DesignSearch & Feed SystemsPersonalization
39
0
395 people solved
Aug 1, 2025
Pinterest logo
Pinterest
Hard
Data Scientist

Demonstrate leadership with concrete STAR examples

Behavioral & Leadership (Onsite) — STAR Examples With Metrics Provide succinct STAR-format examples (Situation, Task, Action, Result), with specific m...

Behavioral & LeadershipLeadership & InfluenceAmbiguity & Decision Making
19
0
152 people solved
Oct 13, 2025
Citadel logo
Citadel
Hard
Software Engineer

Build models for housing and wind power prediction

Two-Part Machine Learning Take-Home Part 1 — Binary Classification: "Can Buy" vs "Cannot Buy" Given applicant and market data, design a binary classif...

ML System DesignSupervised LearningFeature Engineering
12
0
138 people solved
Sep 6, 2025
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