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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
TikTok logo
TikTok
Hard
Data Scientist

Explain SHAP vs VIF under collinearity

High Collinearity in Binary Classification: VIF, SHAP, and Interpretation Strategy You are modeling a binary outcome Y. Two numeric features A and B a...

Machine LearningModel InterpretabilityRegression & Statistical Modeling
8
0
170 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist

Compute credit-card portfolio profit and breakeven

A bank is evaluating a new credit card. Segments: A: 30,000 customers, capture rate 20%, avg annual spend per captured customer = $100,000. B: any pop...

Statistics & MathBusiness Case Analysis
19
0
232 people solved
Oct 13, 2025
Medium
Software Engineer

Reverse a Singly Linked List In Place

Reverse a singly linked list and return its new head. Constraints and Clarifications For the standard practice contract, the list is finite and acycli...

Coding & AlgorithmsLinked Lists
0
0
7 people solved
Jan 14, 2026
Snowflake logo
Snowflake
Medium
Data Scientist

Design an analytic warehouse for event data

Design a warehouse-ready analytics data model and ingestion plan to support cohort retention, ARPU, and product-case analyses at scale (50M events/day...

Data Manipulation (SQL/Python)
2
0
29 people solved
Oct 13, 2025
Scribd logo
Scribd
Medium
Software Engineer Locked

Product Event Tracking and Analytics Pipeline With Flexible Schema and Retention

A system design question about building event tracking and analytics for web product features that emit JSON events with a source, a type, and feature...

System DesignSystem Design FundamentalsData Ingestion & CDC
1
0
18 people solved
Sep 4, 2026
Anthropic logo
Anthropic
Medium
Product Manager

Go-to-Market Plan for Releasing a New Anthropic Product to Current Customers

You are a PM at Anthropic, and the company is about to release a new product. How would you launch it to the people who already use Anthropic's produc...

Product Design & StrategyRequirements & Launch Execution
2
0
17 people solved
Aug 27, 2024
DoorDash logo
DoorDash
Hard
Data Scientist

Diagnose and experiment to reduce late deliveries

Two-Sided Delivery Platform: Rising Late Deliveries You are the first analyst on a two‑sided delivery platform that handles both food and parcel order...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
31
0
246 people solved
Oct 13, 2025
Target logo
Target
Medium
Backend Engineer Locked

Find the Closest Candidate String by Edit Distance

For each query string, select the indexed candidate with the smallest exact edit distance under a deterministic tie-break. The problem assesses dynami...

Coding & Algorithms
3
0
32 people solved
Jul 15, 2026
PhonePe logo
PhonePe
Medium
Product Manager

Launch strategy for a new Google programming language: target developers and adoption

Google wants to bring a new programming language to market. As the product manager, how should Google approach it? `hint Start from the switching cost...

Product Design & StrategyProduct StrategyPlatform & API Products
0
0
6 people solved
Jan 7, 2026
Amazon logo
Amazon
Hard
Applied Scientist Locked

Design systems for global request detection and labeling

This question evaluates the ability to design scalable, low-latency ML systems for global streaming event detection and rapid labeling under extreme c...

ML System Design
10
0
86 people solved
Feb 9, 2026
Apple logo
Apple
Medium
Software Engineer Locked

Explain Runnable vs Callable and thread-safe Singleton

This question evaluates a candidate's knowledge of Java concurrency and design patterns, specifically distinctions between Runnable and Callable, mech...

Software Engineering FundamentalsConcurrencyProgramming Languages
18
0
153 people solved
Jan 17, 2026
Dropbox logo
Dropbox
Medium
Product Manager

How Much Did Airbnb Earn in 2021? A Market-Sizing Estimate for Its Core Business

In a product manager interview, you are asked to estimate Airbnb's annual revenue for 2021. Count only Airbnb's core business and leave out revenue fr...

Product / Decision MakingEstimation & Market Sizing
1
0
10 people solved
Oct 28, 2025
Coinbase logo
Coinbase
Hard
Software Engineer

Design account opening workflow

System Design: Online Bank Account Opening Workflow Context You are designing a high-scale online bank account opening workflow for web and mobile cli...

System DesignSystem Design FundamentalsAPI Design
10
1
155 people solved
Sep 6, 2025
Optiver logo
Optiver
Medium
Software Engineer

Compute negative-price probability after n steps

Random-Walk Price Crossing Probability Setup - Initial price: S₀ = s (real number). - Step size: x > 0. - Number of days: n (integer ≥ 0). - Each day ...

Statistics & MathProbability
7
0
112 people solved
Aug 13, 2025
OpenAI logo
OpenAI
Hard
Software Engineer

Design a minimal ChatGPT with presets

System Design: Minimal ChatGPT-like Service With Reusable Presets Context Design a multi-tenant conversational AI service that supports reusable prese...

System DesignSystem Design FundamentalsAPI Design
27
0
223 people solved
Sep 6, 2025
Pinterest logo
Pinterest
Medium
Data Scientist

Decode and Explain Ambiguity in Compression Strings

Scenario Compression library that encodes an array as count-value pairs where value is one digit but count may be many digits. Question Implement deco...

Coding & Algorithms
19
0
77 people solved
Jul 12, 2025
Expedia logo
Expedia
Hard
Software Engineer

Describe when you distrusted a colleague

Tell me about a time when you did not fully trust a colleague. What caused the concern, how did you validate your assumptions, how did you handle the ...

Behavioral & Leadership
10
0
88 people solved
Jan 6, 2026
Google logo
Google
Medium
Software Engineer Locked

Find cheapest common ancestor in a tree

This question evaluates understanding of tree data structures and ancestor concepts (such as lowest common ancestor) along with algorithmic skills for...

Coding & AlgorithmsTrees
26
1
198 people solved
Feb 12, 2026
IBM logo
IBM
Easy
Data ScientistIntern

How do you detect and fix multicollinearity?

In a regression-style model (e.g., linear regression or logistic regression) you suspect multicollinearity among features. 1) What is multicollinearit...

Statistics & Math
6
0
93 people solved
Nov 9, 2025
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Design a simple API rate limiter

This question evaluates competency in designing scalable, low-latency API rate limiting, covering distributed-systems reasoning, storage and caching t...

System DesignRate LimitingSystem Design Fundamentals
12
0
127 people solved
Feb 11, 2026
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