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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
NVIDIA logo
NVIDIA
Medium
Software Engineer Locked

Explain Amdahl’s law and GPU matmul optimization

This question evaluates understanding of systems and performance fundamentals including parallel speedup (Amdahl’s law), GPU memory hierarchy and thre...

Software Engineering FundamentalsGPU InfrastructureProgramming Languages
7
0
94 people solved
Jan 14, 2026
DoorDash logo
DoorDash
Medium
Data Scientist Locked

Should DoorDash add bicycle dashers?

This question evaluates a data scientist's skills in experimental design, causal inference, marketplace analytics, metrics engineering, and business-i...

Analytics & Experimentation
6
0
64 people solved
Jan 12, 2026
Shopify logo
Shopify
Hard
Data Scientist

Present Piracy Trends to a PM

You ran the analyses above and got two preliminary findings: - the monthly pirated-theme usage rate appears to rise from 0% to 100% over the observed ...

Analytics & Experimentation
9
0
67 people solved
Jan 12, 2026
UiPath logo
UiPath
Easy
Machine Learning Engineer Locked

Analyze Complexity and Probability Basics

This question evaluates understanding of data structures and algorithmic time complexity for hash map operations, the computational complexity of dens...

Software Engineering Fundamentals
2
0
53 people solved
Jan 10, 2026
R
Reinforce Labs
Medium
Software Engineer Locked

Compute minimum added stones to balance a tree

This question evaluates competency in tree algorithms, subtree aggregation, and integer resource balancing by requiring reasoning about hierarchical s...

Coding & Algorithms
2
0
42 people solved
Jan 8, 2026
R
Reinforce Labs
Medium
Software Engineer Locked

Write SQL to compute current product stock

This question evaluates SQL competence in aggregations and relational joins, including handling baselines, nullable data, temporal filtering, and accu...

Software Engineering Fundamentals
3
0
28 people solved
Jan 8, 2026
Meta logo
Meta
Medium
Software Engineer Locked

Design a ranking and recommendation system

This question evaluates a candidate's competency in designing end-to-end ranking and recommendation systems, covering candidate generation, ranking, f...

System Design
10
0
69 people solved
Jan 6, 2026
Microsoft logo
Microsoft
Medium
Machine Learning EngineerSenior+ Locked

Infer user intent from typing in real time

This question evaluates machine learning system design competency in streaming, low-latency intent inference from typing and UI context, covering priv...

ML System Design
4
0
82 people solved
Jan 6, 2026
Microsoft logo
Microsoft
Medium
Machine Learning EngineerSenior+ Locked

Design email ranking and summarization in Outlook

This question evaluates proficiency in designing end-to-end machine learning systems for personalized email ranking and abstractive summarization, enc...

ML System Design
8
0
69 people solved
Jan 6, 2026
Bloomberg logo
Bloomberg
Medium
Software Engineer Locked

Validate whether brackets are properly nested

This question evaluates proficiency in sequence validation, paired-token matching, and the use of data structures to manage nested elements within str...

Coding & AlgorithmsStacks & Queues
14
0
109 people solved
Jan 6, 2026
Startups.Com logo
Startups.Com
Medium
Machine Learning Engineer Locked

Design NL-to-SQL performance optimization assistant

This question evaluates a candidate's ability to design a secure, reliable, and cost-conscious natural-language-to-SQL performance diagnostic system t...

System Design
4
0
39 people solved
Jan 6, 2026
Amazon logo
Amazon
Medium
Applied Scientist Locked

Design a search relevance prediction approach

This question evaluates competency in machine learning for search relevance, including relevance modeling, feature engineering across lexical, semanti...

Machine Learning
6
0
61 people solved
Jan 6, 2026
Amazon logo
Amazon
Medium
Applied Scientist Locked

Explain why CTR rises but CVR unchanged

This question evaluates a candidate's competency in experimental design and statistical analysis, specifically interpreting divergent engagement and o...

Analytics & Experimentation
4
0
69 people solved
Jan 6, 2026
TikTok logo
TikTok
Medium
Software Engineer Locked

Answer core Python, CS, DB, and testing questions

This multi-part prompt evaluates core software engineering competencies including Python fundamentals (OOP, object/model behavior, iterators/generator...

Software Engineering Fundamentals
3
0
48 people solved
Jan 6, 2026
Meta logo
Meta
Medium
Software Engineer Locked

Find shortest path in an OOP maze

This question evaluates graph traversal and shortest-path reasoning within an object-oriented codebase, focusing on state representation, neighbor exp...

Coding & Algorithms
2
0
45 people solved
Jan 5, 2026
PayPal logo
PayPal
Hard
Data Scientist

Interpret p-values and common pitfalls

In a Fraud Data Science interview, you are asked “some p-value questions.” Answer the following in a fraud/experimentation context: 1) Define a p-valu...

Statistics & Math
7
0
67 people solved
Jan 2, 2026
Snapchat logo
Snapchat
Hard
Software Engineer Locked

Design a Story feature with offline support

This question evaluates proficiency in large-scale system design, including distributed storage, cache and CDN strategies, API and data model design, ...

System DesignSystem Design FundamentalsFile & Media Storage
11
0
81 people solved
Jan 2, 2026
Meta logo
Meta
Medium
Software Engineer Locked

Design ad click tracking and dashboard at scale

This question evaluates a candidate's skills in designing large-scale distributed systems including real-time data ingestion and aggregation, storage ...

System Design
4
0
51 people solved
Jan 1, 2026
Lyft logo
Lyft
Hard
Data Scientist

How to Target Coupon Users

A ride-sharing company such as Lyft wants to launch a coupon campaign to increase commuter rides, but the coupon budget is limited. How would you anal...

Analytics & ExperimentationPersonalizationCausal Inference
12
0
155 people solved
Dec 16, 2025
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
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