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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
Pinterest logo
Pinterest
Medium
Machine Learning Engineer Locked

Design notification and feed recommenders

This question evaluates an engineer's ability to design scalable, production-ready recommendation systems for notifications and home feeds, encompassi...

ML System DesignRecommendation SystemsRanking Models
20
0
181 people solved
Mar 8, 2026
Meta logo
Meta
Hard
Machine Learning EngineerSenior+

Design image and multimodal generation systems

System Design: Image Generation and Multimodal Generation Part 1 — End-to-End Image Generation System Design an end-to-end image generation system. Co...

ML System DesignGenerative ModelsNeural Networks & Training
17
0
188 people solved
Aug 11, 2025
Meta logo
Meta
Medium
Data Engineer

Write SQL for active follow connections

Table: follow_events(requester_id INT, target_id INT, event STRING CHECK (event IN ('request_follow','follow_success','follow_reject','unfollow')), ev...

Data Manipulation (SQL/Python)
5
2
54 people solved
Aug 1, 2025
Amazon logo
AmazonGoogleMetaMicrosoft

Also asked at Meta, Microsoft

Easy
Software Engineer

Determine the Winner of Repeated Proper-Divisor Subtraction

Problem Two players alternate from positive integer n, with the first player moving first. A legal move chooses a positive proper divisor x of the cur...

Coding & AlgorithmsMath & Number Theory
1
0
10 people solved
Riotgames logo
Riotgames
Easy
Software Engineer Locked

Trace a Web Page Load Through the Browser

Explain what happens when a browser opens a web address, from networking through HTML/CSS parsing, DOM and CSSOM construction, JavaScript compilation,...

Software Engineering Fundamentals
2
0
30 people solved
Aug 26, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Clarify and Solve a Rotate-or-Flip Array Puzzle

Turn an underspecified rotate-or-flip array puzzle into a precise interview problem before solving it. Learn how operation scope, direction, distance,...

Software Engineering Fundamentals
7
0
64 people solved
May 25, 2026
Wells Fargo logo
Wells Fargo
Medium
Software EngineerSenior+ Locked

Choose LLMs for Software Engineering Tasks

Describe how to choose and verify LLMs for engineering work using task-specific evidence, minimal context, privacy controls, tests, and measured cost.

Software Engineering FundamentalsAI-Assisted Development
2
0
26 people solved
Aug 19, 2026
Meta logo
Meta
Easy
Data Scientist

How would you define and use retention metrics?

Scenario You are a Data Scientist supporting a consumer product (app or website). A PM asks you to “dive deep” on user retention and recommends tracki...

Analytics & ExperimentationSegmentation & Cohort AnalysisMetrics & KPIs
15
0
202 people solved
Feb 18, 2026
Pinterest logo
Pinterest
Medium
Data Scientist Locked

How would you evaluate a carousel launch?

This question evaluates a data scientist's skills in experimental design, product-metric specification, causal inference, and diagnostic analysis for ...

Analytics & ExperimentationLaunch EvaluationMetric Diagnostics
60
0
376 people solved
Mar 10, 2026
OpenAI logo
OpenAI
Medium
Machine Learning Engineer

Find earliest supporting version under constraints

You are given version strings formatted as {major}.{minor}.{patch}, e.g., "103.003.03". Each version either supports a feature or not. You may call is...

Coding & AlgorithmsBinary Search
34
0
562 people solved
Sep 6, 2025
Roblox logo
Roblox
Medium
Data Scientist

Defend a metric choice under scrutiny

Describe a time you chose a non-obvious primary metric (e.g., time-per-session over total time) and were challenged by a senior stakeholder. 1) How di...

Behavioral & LeadershipMetrics & KPIsCommunication & Stakeholders
7
0
107 people solved
Oct 13, 2025
Pinterest logo
Pinterest
Medium
Software Engineer

Decide target via subsequence plus/multiply expression

Question Given a sequence of positive 32-bit integers A and an integer target, determine whether there exists a subsequence of A (preserving order, us...

Coding & AlgorithmsBacktracking & Recursion
21
0
309 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Product Manager

Launch Decision for Facebook Reactions: Metrics, Experiment Design and Trade-offs

You are a product manager at Meta. Assume "Reactions" means extending the Like button on Facebook posts: instead of only liking a post, people can cho...

Product / Decision MakingLaunch EvaluationExperiment Design (A/B Testing)
1
0
11 people solved
Mar 1, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Design and implement a Python solution

Design and implement a solution in Python for a problem specified by the interviewer. Outline your approach and chosen data structures, justify key de...

Coding & Algorithms
33
0
310 people solved
Sep 6, 2025
Cresta logo
Cresta
Medium
Software Engineer

Design sequence decoding with greedy and beam search

Design sequence decoding with greedy and beam search Next-Token Decoding: Greedy and Beam Search Context You are given a probabilistic next-token dict...

Machine LearningGreedyHeaps & Priority Queues
106
0
899 people solved
Aug 8, 2025
Google logo
Google
Hard
Machine Learning Engineer

Design data structure similar to LRU cache

You are asked to design and implement a data structure that behaves similarly to an LRU (Least Recently Used) cache, but with a small variation: - The...

Coding & AlgorithmsData Structure DesignLinked Lists
13
1
154 people solved
Dec 8, 2025
Capital One logo
Capital One
Medium
Business AnalystSenior+

Compute gala vs online break-even donors

A nonprofit must choose one of two fundraising options. Option A (Gala): capacity 100 attendees; fixed cost $20,000; variable cost $100 per attendee. ...

Statistics & Math
12
0
100 people solved
Oct 13, 2025
Rippling logo
Rippling
Medium
Software Engineer Locked

Design Extensible Interview Coding Systems

Review a broad software engineering interview loop covering object-oriented delivery APIs, rule engines, article voting systems, and a news aggregator...

Software Engineering FundamentalsLow-Level Design (OOP)Search & Feed Systems
30
0
265 people solved
Jun 11, 2026
Amazon logo
Amazon
Medium
Software Engineer

Finding the Root Cause of an Intermittent Failure When the Obvious Metrics Look Healthy

Tell me about a time when a system was failing intermittently, and the very obvious metrics were all looking good. How did you find the root cause, an...

Behavioral & LeadershipDebuggingObservability
4
0
33 people solved
Sep 10, 2026
OneMain Financial logo
OneMain Financial
Medium
Data Scientist

Count, Return, Find, and Select in SQL Queries

orders +----------+--------------+------------+--------+ | order_id | customer_id | order_date | amount | +----------+--------------+------------+---...

Data Manipulation (SQL/Python)
81
0
246 people solved
Jul 12, 2025
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