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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
Salesforce logo
Salesforce
Hard
Software Engineer Locked

Design an async job system and cache layer

This question evaluates system design competencies including asynchronous job orchestration, reliable background processing (state transitions, retrie...

System DesignSystem Design FundamentalsCaching
17
0
173 people solved
Jan 22, 2026
Google logo
Google
Medium
Product Manager

Product Sense Case: Fixing the Biggest Pain Points in a Flyer's Journey

Propose how you would improve the experience of people who travel by air. Decide which travelers and which part of the trip to focus on, identify the ...

Product Design & StrategyProduct SenseMetrics & KPIs
0
0
10 people solved
Dec 19, 2025
Reddit logo
Reddit
Easy
Machine Learning Engineer

Design a Comment Ranking System for Threaded Post Discussions

Design the system that ranks the comments under a post on a large online discussion platform. Assume users write comments on posts, reply to each othe...

ML System DesignRanking ModelsModel Evaluation
0
0
1 people solved
Aug 13, 2026
Uber logo
Uber
Medium
Software Engineer Locked

Maximize Throughput and Count Trigger Components

This question evaluates proficiency in algorithmic optimization under resource constraints (maximizing pipeline throughput within a budget) and in mod...

Coding & Algorithms
3
0
26 people solved
May 28, 2026
DoorDash logo
DoorDash
Medium
Data Scientist

Measure Late Deliveries and Identify Top Delayed Restaurants

orders +----------+---------+--------------+---------------------+-------------------------+-----------------------+ | order_id | user_id | restaurant...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
10
1
85 people solved
Aug 4, 2025
Lead Bank logo
Lead Bank
Medium
Software Engineer Locked

Explain PM collaboration and AI code quality

This question evaluates collaboration and leadership competencies in partnering with Product Managers and in managing code quality risks introduced by...

Behavioral & LeadershipAI-Assisted DevelopmentConflict & Collaboration
3
0
31 people solved
May 26, 2026
LinkedIn logo
LinkedIn
Medium
Data Scientist

Resolve Conflicting A/B Test Results in Cities

A/B Test Paradox Across Two Cities You ran an A/B test in two geographies, City X and City Y. Within each city, variant A outperforms variant B. Howev...

Analytics & Experimentation
28
0
91 people solved
Jul 12, 2025
TikTok logo
TikTok
Easy
Data Scientist

Implement stacks, streaming median, and upward path sum

Complete the following coding problems. State the time/space complexity and key edge cases for each. 1) MinStack Design a stack that supports: - push(...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues
16
0
191 people solved
Feb 17, 2026
Google logo
Google
Medium
Product Manager

Defend a mobile OS preference and design a product that exploits that platform

An interviewer asks whether you prefer iOS or Android, then asks you to design a product of your own choosing for the platform you picked. Answer both...

Product Design & StrategyProduct SensePrioritization & Tradeoffs
0
0
6 people solved
Aug 11, 2026
Stripe logo
Stripe
Medium
Product Manager

Diagnosing a Decline in Stripe Checkout Payment Conversion

You are a product manager at Stripe, and the dashboard shows that the conversion rate of the checkout page has fallen by 10%. What would you do? Expla...

Analytics & ExperimentationMetric DiagnosticsUser Behavior & Funnels
1
0
11 people solved
Aug 13, 2025
Meta logo
Meta
Medium
Machine Learning Engineer Locked

Implement exponentiation and fill grid distances

This question evaluates algorithmic problem-solving skills in the Coding & Algorithms domain, specifically numeric algorithms for fast exponentiation ...

Coding & AlgorithmsMath & Number TheoryGrids & Matrices
5
0
108 people solved
Jan 8, 2026
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Reverse Linked List Groups

This question evaluates linked list manipulation, pointer/reference management, in-place iterative algorithms, and the ability to enforce O(1) extra s...

Coding & Algorithms
3
0
24 people solved
May 28, 2026
Snapchat logo
Snapchat
Medium
Software Engineer Locked

Design an Instagram Stories feature

This question evaluates backend system design competencies including distributed systems, scalability, data modeling, API design, media storage/transc...

System DesignSystem Design FundamentalsFile & Media Storage
7
0
98 people solved
Feb 8, 2026
Capital One logo
Capital One
Easy
Data Scientist

Calculate Incremental Customers for Marketing Spend Justification

Incremental Customers Needed for Marketing Spend You previously computed the per-customer annual profit for a new cardholder, excluding partnership ma...

Statistics & MathBusiness Case Analysis
61
1
110 people solved
Jul 12, 2025
Notion logo
Notion
Medium
Data Scientist

Analyze document collaboration patterns

You are given two CSV files and asked to analyze collaboration behavior on documents. File 1: document_activity.csv Each row is a document view event....

Data Manipulation (SQL/Python)SQLSegmentation & Cohort Analysis
19
0
144 people solved
Aug 10, 2025
Goldman Sachs logo
Goldman Sachs
Medium
Software Engineer

Solve string and hashmap interview tasks

Coding questions (solve both) 1) First non-repeating character Given a string s, return the first character that appears exactly once in the string. -...

Coding & AlgorithmsArrays & Strings
25
0
176 people solved
Dec 9, 2025
Meta logo
Meta
Medium
Machine Learning Engineer

Compute binary tree left-side view

Given a binary tree, return the values visible from the left side when looking from top to bottom. If multiple nodes exist at the same depth, the left...

Coding & Algorithms
6
0
74 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Data Scientist

Explore Behavioral Growth and Adaptability in Data Science.

Behavioral Deep-Dive: Growth, Agility, Cross-Team Support, and Inclusion You are in a behavioral and leadership round for a Data Scientist role. The i...

Behavioral & LeadershipFailure & LearningAmbiguity & Decision Making
118
0
425 people solved
Jul 12, 2025
Goldman Sachs logo
Goldman Sachs
Medium
Software Engineer Locked

Solve string and hashmap coding tasks

This multi-part prompt evaluates string manipulation, hash map usage for grouping and lookup, and simulation of sequential commands, along with robust...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
14
0
171 people solved
Feb 11, 2026
Snapchat logo
Snapchat
Medium
Software Engineer

Implement XML tokenizer and parser with operations

Implement XML tokenizer and parser with operations You are given either (a) a raw XML-like string such as <catalog><book><author>Gambardella, Matthew<...

Coding & AlgorithmsParsing & InterpretersTrees
6
0
115 people solved
Aug 10, 2025
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