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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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 Locked

Design comment ranking for a news feed

This question evaluates a candidate's ability to design an ML-powered comment-ranking system, testing competencies in personalization, engagement and ...

ML System DesignRanking ModelsPersonalization
7
0
103 people solved
Dec 15, 2025
Meta logo
Meta
Medium
Machine Learning Engineer Locked

Design weapon-selling ad detection from posts

This question evaluates a candidate's ability to design a production-scale multimodal ML system for detecting weapon-selling ads, testing competencies...

ML System DesignModel EvaluationSupervised Learning
15
0
115 people solved
Dec 15, 2025
Meta logo
Meta
Medium
Software Engineer Locked

Design a Netflix-like video streaming service

This question evaluates competency in designing large-scale streaming platforms, focusing on distributed systems, content storage and encoding pipelin...

System Design
4
0
54 people solved
Dec 15, 2025
The Trade Desk logo
The Trade Desk
Hard
Data ScientistIntern

Evaluate and safely deploy a CVR model online

You have built a new CVR (conversion rate) prediction model for an RTB bidding system at a DSP. Offline metrics improved (e.g., lower log loss and hig...

Analytics & Experimentation
4
0
56 people solved
Dec 10, 2025
Amazon logo
Amazon
Easy
Applied Scientist Locked

Explain weight initialization methods and goals

This question evaluates a candidate's understanding of weight initialization in deep neural networks, assessing competencies in training dynamics such...

Machine Learning
7
0
78 people solved
Dec 8, 2025
Amazon logo
Amazon
Easy
Applied Scientist

Explain vanishing gradients and activations

Explain the vanishing gradient problem in deep neural networks. In your answer: - Describe how backpropagation works at a high level and why gradients...

Machine Learning
7
0
76 people solved
Dec 8, 2025
Walmart Labs logo
Walmart Labs
Easy
Machine Learning Engineer Locked

Design an LLM agent with RAG and tools

This question evaluates proficiency in designing LLM-based agents, covering retrieval-augmented generation, tool/API orchestration, safety and evaluat...

Machine Learning
8
0
66 people solved
Dec 7, 2025
Walmart Labs logo
Walmart Labs
Easy
Machine Learning Engineer Locked

Design an item category prediction system

This question evaluates a candidate's ability to design end-to-end machine learning systems for multi-class or hierarchical item categorization, encom...

ML System Design
6
0
54 people solved
Dec 7, 2025
OneMain Financial logo
OneMain Financial
Easy
Data Scientist Locked

Explain Type I vs Type II errors

This question evaluates understanding of hypothesis testing and statistical inference, focusing on definitions and implications of Type I and Type II ...

Statistics & Math
4
0
55 people solved
Dec 1, 2025
Meta logo
Meta
Medium
Machine Learning Engineer Locked

Design concurrent expiring job registry

This question evaluates understanding of concurrent data structures, synchronization primitives, time-based expiration semantics, and efficient cleanu...

Software Engineering Fundamentals
2
0
29 people solved
Nov 28, 2025
Meta logo
Meta
Easy
Data Scientist Locked

Define hand-waving accuracy and launch decision

This question evaluates a data scientist's ability to define and operationalize detection metrics, design instrumentation and diagnostics, connect mod...

Analytics & Experimentation
4
0
56 people solved
Nov 16, 2025
PayPal logo
PayPal
Easy
Data Scientist

Reduce airport ride cancellations under causal constraints

Question You are a Data Scientist supporting an airport rides / airport pickups team at a ride-hailing marketplace. Airport pickups are operationally ...

Analytics & Experimentation
4
0
60 people solved
Nov 3, 2025
TikTok logo
TikTok
Easy
Data Scientist Locked

Design and decompose Trust & Safety risk metrics

This question evaluates a data scientist's competency in Trust & Safety metric design, including defining primary and diagnostic metrics, decomposing ...

Analytics & ExperimentationMetrics & KPIsMetric Diagnostics
10
0
82 people solved
Nov 1, 2025
Meta logo
Meta
Easy
Data Scientist

How would you evaluate a new ads ranking algorithm?

Context You work at a social network company with an ads marketplace. The company has an existing ads ranking algorithm currently used to select and o...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
13
0
102 people solved
Oct 30, 2025
TikTok logo
TikTok
Easy
Data Scientist Locked

How would you manage precision/recall for fraud detection?

This question evaluates a candidate's competency in applied machine learning for fraud detection, covering model performance measurement, thresholding...

Machine Learning
4
0
53 people solved
Oct 26, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Diagnose Decline in Successful Orders

You are a Data Scientist at a food-delivery marketplace. In one geographic market, the number of successful orders has declined over the past 4 weeks....

Analytics & ExperimentationMetric DiagnosticsMetrics & KPIs
7
0
114 people solved
Oct 21, 2025
Illumio logo
Illumio
Medium
Software Engineer Locked

Count Regions in a Binary Grid

This question evaluates understanding of grid-as-graph representations, identification of connected components, and competency in algorithmic problem-...

Coding & Algorithms
1
0
30 people solved
Oct 20, 2025
Meta logo
Meta
Medium
Product Analyst Locked

How to evaluate emoji reactions?

This question evaluates product analytics and experimentation competencies for a Product Analyst role in the Analytics & Experimentation domain, focus...

Analytics & Experimentation
2
0
40 people solved
Oct 20, 2025
Meta logo
Meta
Medium
Software Engineer Locked

Design a flight search platform

This question evaluates understanding of distributed systems, API and data model design, large-scale data ingestion and indexing, search ranking and c...

System Design
1
0
30 people solved
Oct 17, 2025
Meta logo
Meta
Medium
Data Scientist

Compute posterior fake probability using Bayes' rule

A platform runs an automated detector to flag fake accounts. - Prior probability an account is fake: \(P(F)=0.02\). - True positive rate (sensitivity)...

Statistics & Math
11
0
78 people solved
Oct 14, 2025
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