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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
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)
1
0
16 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Data Scientist

Explain Central Limit Theorem and Its Limitations

Explain Central Limit Theorem and Its Limitations Statistics Concepts and Disease-Test Evaluation Context You are assessing core statistical concepts ...

Statistics & Math
10
0
84 people solved
Aug 4, 2025
eBay logo
eBay
Medium
Software Engineer Locked

Implement list and grid transformation tasks

This question evaluates skills in character classification, array and list manipulation, greedy repartitioning logic, and iterative grid simulation wi...

Coding & Algorithms
5
0
63 people solved
Jan 6, 2026
TikTok logo
TikTok
Medium
Data Scientist

Align Conflicting Stakeholders for Successful Project Delivery

Behavioral Interview: Aligning Conflicting Stakeholders Cross-functional projects often require coordination between data scientists, engineers, produ...

Behavioral & Leadership
15
0
74 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Software Engineer

Answer four string/array/battery coding questions

You are given four independent coding questions. Problem A — Uppercase vs lowercase count difference Given a string s (ASCII), count how many characte...

Coding & Algorithms
6
0
63 people solved
Dec 16, 2025
Truefoundry logo
Truefoundry
Medium
Software Engineer Locked

Verify Ordering Under a Scrambled Alphabet

Given a sequence of words and an alphabet string that lists every allowed character from smallest to largest, determine whether the words are sorted i...

Coding & Algorithms
2
0
30 people solved
Aug 1, 2026
Uber logo
Uber
Hard
Software Engineer

Implement three interview-style coding tasks

You are given three separate coding tasks, all focused on algorithm and data-structure design. --- Task 1: Longest Bounded-Difference Subarray You are...

Coding & AlgorithmsTwo Pointers & Sliding WindowData Structure Design
17
0
146 people solved
Nov 11, 2025
Robinhood logo
Robinhood
Medium
Data Scientist

List Transactions During Active 'Gold' Membership Period

customer_profile +-------------+----------------+--------------------+-------------------+ | customer_id | membership_type| membership_start_date| mem...

Data Manipulation (SQL/Python)
72
0
206 people solved
Aug 4, 2025
Salesforce logo
Salesforce
Hard
Software Engineer

Architect serving and storage for recommender

Architect serving and storage for recommender System Design: Recommendation Service (Serving + Data Infrastructure) Context Design a production-ready ...

System DesignSystem Design FundamentalsCaching
8
0
100 people solved
Aug 1, 2025
Meta logo
Meta
Hard
Software EngineerSenior+ Locked

Design Top-K, Crawler, and Chess Systems

This question evaluates system-design competency across scalable distributed services, covering real-time streaming Top-K aggregation, large-scale dis...

System DesignSystem Design FundamentalsBatch & Stream Processing
11
0
123 people solved
Jun 2, 2026
NewsBreak logo
NewsBreak
Hard
Machine Learning Engineer

Design approach for class imbalance

Design approach for class imbalance Imbalanced Binary Classification: Learning, Evaluation, and Model Selection Context You are training a binary clas...

Machine Learning
3
0
64 people solved
Aug 9, 2025
Amazon logo
Amazon
Medium
Software Engineer

Compute optimal locker placement with obstacles

Compute optimal locker placement with obstacles Given house coordinates H = {(xi, yi)} and tree coordinates T = {(xj, yj)} on a 2D integer grid, choos...

Coding & Algorithms
7
0
59 people solved
Aug 7, 2025
Roblox logo
Roblox
Hard
Machine Learning Engineer

Design a real-time game recommendation system

Design a real-time game recommendation system System Design: Real‑Time Game Recommendation System (Architecture Focus) You are designing a real‑time r...

ML System DesignRecommendation SystemsReal-Time Systems
13
0
225 people solved
Jul 16, 2025
eBay logo
eBay
Medium
Software Engineer

Count Connected Land Regions

You are given an m x n 2D grid representing a map. Each cell is either land ('1') or water ('0'). A land region is formed by connecting adjacent land ...

Coding & Algorithms
4
0
28 people solved
Jan 27, 2026
Oracle logo
Oracle
Medium
Software Engineer Locked

Design an E-Commerce Recommendation System from Browsing History

Design a large-scale recommendation system that uses users' browsing histories to rank products. Connect data and model choices to serving architectur...

ML System Design
0
0
16 people solved
Jul 26, 2026
O
Others
Easy
Data Scientist

Answer ancestor-walk queries on a rooted tree

Problem (Tree / Parent Array Queries) You are given a rooted tree with n nodes labeled 1..n, represented by a parent array par[1..n]: - par[i] is the ...

Coding & Algorithms
2
0
42 people solved
Jan 17, 2026
Amazon logo
Amazon
Medium
Software Engineer

Justify choosing JavaScript for interviews

If given a choice of language, why would you choose JavaScript for front-end interview coding? Compare trade-offs versus TypeScript or Python regardin...

Coding & Algorithms
8
0
62 people solved
Sep 6, 2025
Oracle logo
Oracle
Medium
Software Engineer

Describe cross-team collaboration

Describe cross-team collaboration Behavioral & Leadership: Cross‑Team Collaboration (Onsite SWE) You are interviewing onsite for a Software Engineer r...

Behavioral & LeadershipConflict & Collaboration
10
0
104 people solved
Aug 7, 2025
Meta logo
Meta
Medium
Data Engineer

Write SQL and Python for data prep

Given clickstream events (user_id, event_type, ts, properties) and a users table (user_id, signup_ts, plan), write SQL to compute DAU/WAU/MAU, D1/W1 r...

Data Manipulation (SQL/Python)
3
1
27 people solved
Jul 15, 2025
Pinterest logo
Pinterest
Medium
Data Scientist

Maximize Non-Overlapping Task Scheduling Efficiency

Scenario Job scheduler on a single machine wants to maximise throughput. Question Given tasks with [start, end) times, return the maximum number of no...

Coding & Algorithms
15
0
46 people solved
Jul 12, 2025
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