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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
Meta logo
Meta
Medium
Machine Learning Engineer

Generate unique permutations with duplicates

Given an array of integers that may contain duplicates, generate all unique permutations. Ensure no duplicate permutations are returned even if some v...

Coding & Algorithms
10
0
76 people solved
Sep 6, 2025
Capital One logo
Capital One
Medium
Software Engineer

Solve powers, phases, grid pops, and swaps

Solve the following four problems: 1) Count powers of k in an array: Given an array of positive integers nums and an integer k >= 1, return how many e...

Coding & AlgorithmsMath & Number TheoryGrids & Matrices
18
0
196 people solved
Sep 6, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer Locked

Implement streaming enrichment aggregator

This question evaluates competency in stateful stream processing, event-driven aggregation, in-memory state management, time-based expiry, and produci...

Coding & AlgorithmsData Structure DesignBatch & Stream Processing
18
0
159 people solved
Jan 11, 2026
OpenAI logo
OpenAI
Hard
Data Scientist Locked

Measure free-month promotion impact

This question evaluates causal inference and experimentation skills, including randomized design and estimand framing, metric and ROI attribution, han...

Analytics & ExperimentationExperiment Design (A/B Testing)Business Case Analysis
21
0
186 people solved
Jan 15, 2026
Ambience Healthcare logo
Ambience Healthcare
Medium
Software Engineer

Design a least-recently-used cache

Design a least-recently-used cache Design and implement a least-recently-used (LRU) cache with a fixed capacity. Support get(key) -> value and put(key...

Coding & AlgorithmsData Structure DesignLinked Lists
15
0
132 people solved
Jul 31, 2025
Google logo
Google
Medium
Data Scientist

Establish causality: commute playlist and driving speed

A lawyer worries that listening to a "Commute" playlist in a mobile app makes users drive faster. As the DS: a) Define the population, unit of analysi...

Analytics & ExperimentationCausal InferenceExperiment Design (A/B Testing)
6
0
126 people solved
Oct 13, 2025
Agoda logo
Agoda
Medium
Software Engineer

Compute probability two arrivals meet within 15 minutes

Probability puzzle Two people plan to meet, but they arrive independently at a random time within the next 1 hour. - Person A’s arrival time is unifor...

Software Engineering FundamentalsProbabilityPuzzles & Brainteasers
13
0
150 people solved
Dec 14, 2025
Stripe logo
Stripe
Medium
Software Engineer Locked

Validate CSV rows under multiple verification rules

This question evaluates skills in CSV parsing, string normalization and multi-rule data validation, covering whitespace handling, length checks, case-...

Coding & Algorithms
20
0
149 people solved
Jan 6, 2026
xAI logo
xAI
Medium
Product Manager

xAI PM Behavioral: Running Contractor Programs That Improve Models After Training

Tell me about a time you led a large effort to make a model or algorithm better after its initial training, with much of the work done by contractors....

Behavioral & LeadershipLeadership & InfluenceAnnotation & Label Quality
0
0
7 people solved
Jun 27, 2026
TikTok logo
TikTok
Hard
Software Engineer

Design a high-concurrency ticketing system

Question Design a high-concurrency ticketing / flash-sale system for limited inventory (e.g. tickets to a popular concert with a fixed number of seats...

System DesignRate LimitingDistributed Transactions & Idempotency
20
0
265 people solved
Sep 6, 2025
Amazon logo
Amazon
Hard
Software EngineerIntern

Answer common internship behavioral questions

You have ~25–30 minutes for behavioral questions (with possible follow-ups). Prepare strong, concrete answers (internship-level scope is fine) for: 1....

Behavioral & LeadershipMotivation & FitAmbiguity & Decision Making
16
0
182 people solved
Feb 8, 2026
TikTok logo
TikTok
Medium
Software Engineer

Count islands on a torus grid

You are given an m x n binary grid representing water ( 0) and land ( 1) laid out on a torus: the top edge is adjacent to the bottom edge and the left...

Coding & Algorithms
10
0
76 people solved
Sep 6, 2025
Apple logo
Apple
Hard
Software EngineerNew Grad Locked

Explain thermal and signal fundamentals

This question evaluates understanding of hardware fundamentals including thermal-resistance modeling, digital signal biasing (pull-up resistor selecti...

Software Engineering Fundamentals
8
0
93 people solved
Feb 25, 2026
Safeway logo
Safeway
Medium
Product Manager

Supermarket Chain Product Design for an Underserved Niche Shopper Segment

You are a product manager at a large supermarket chain; use Safeway as the concrete example. Your task is to build a product that serves niche markets...

Product Design & StrategyProduct SenseMetrics & KPIs
0
0
7 people solved
Aug 12, 2026
Intuit logo
Intuit
Medium
Software Engineer

Implement LRU, Extend to LFU, Analyze Complexity

Implement an in-memory Least Recently Used (LRU) cache with capacity N that supports get(key) -> value and put(key, value). Achieve O( 1) average time...

Coding & Algorithms
6
0
123 people solved
Sep 6, 2025
P
Persistence
Medium
Software Engineer Locked

Reason About Indexes, Kafka, and Database Locking

Reason through practical database indexes, Kafka consumption, and transaction locking using concrete order and inventory workloads. The interview test...

Software Engineering Fundamentals
5
0
50 people solved
Jul 26, 2026
LinkedIn logo
LinkedIn
Medium
Software EngineerSenior+ Locked

Solve substring and top‑K pair problems

This multi-part question evaluates algorithm design and data-structure proficiency across string processing (minimum window substring), pair-selection...

Coding & AlgorithmsTwo Pointers & Sliding WindowData Structure Design
19
0
144 people solved
Oct 13, 2025
Meta logo
Meta
Easy
Data Scientist

Evaluate account re-ranking via logs and A/B test

A product has users with multiple accounts. In the UI, these accounts are shown as a list. - Current ranking: accounts are sorted by most recent visit...

Analytics & Experimentation
9
0
82 people solved
Feb 3, 2026
DoorDash logo
DoorDash
Medium
Data ScientistSenior+

How would you mentor junior teammates?

Question You are interviewing for a senior-level data science role at DoorDash. The interviewer asks: > As a senior, how would you mentor others (espe...

Behavioral & LeadershipMentoring & Team GrowthLeadership & Influence
21
0
163 people solved
Feb 28, 2026
Bloomberg logo
Bloomberg
Medium
Software EngineerSenior+ Locked

Minimize Travel Assignment Cost

This question evaluates algorithmic problem-solving in combinatorial optimization and dynamic programming, testing competency with cost-minimization, ...

Coding & Algorithms
7
0
74 people solved
Jun 1, 2026
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