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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
xAI logo
xAI
Medium
Software Engineer

Versioned Key-Value Store with Nested Transactions (Begin, Commit, Rollback)

Implement an in-memory versioned key-value database that supports transactional writes with three transaction-control operations: begin (start a trans...

Coding & Algorithms
7
0
110 people solved
Aug 7, 2025
Google logo
Google
Medium
Software Engineer

Check if all substrings are dictionary words

You are given a string s (letters only) and access to an English dictionary dict (a set of valid words). Return true if every contiguous substring of ...

Coding & AlgorithmsString Algorithms
59
0
560 people solved
Mar 11, 2026
Capital One logo
Capital One
Hard
Data Scientist

Present and critique an airline delay analysis

Predicting Airline Departure Delays — Technical Screen Prompt Context You have 15 minutes to review a slide deck on predicting airline departure delay...

Analytics & ExperimentationFeature EngineeringRegression & Statistical Modeling
56
0
383 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Product Manager

Triage Framework for Prioritizing Bugs, Complaints and Incidents as a PM

Walk the interviewer through how you triage the issues that reach your team, such as bugs, customer-reported problems and production incidents: how yo...

Product / Decision MakingPrioritization & Tradeoffs
1
0
10 people solved
Aug 6, 2026
Affirm logo
Affirm
Hard
Software Engineer Locked

Compute Balances and Minimize Settlements

This question evaluates transactional data aggregation and net-balance computation skills alongside combinatorial optimization for minimizing settleme...

Coding & AlgorithmsBacktracking & RecursionArrays & Strings
22
0
183 people solved
Feb 27, 2026
Crowdstrike logo
Crowdstrike
Medium
Software EngineerSenior+

Implement an In-Memory Key-Value Cache with Expiry, Then Sketch a Redis-Like Server

Implement an in-memory key-value cache that behaves like a small subset of Redis, then spend a few minutes on how you would design a Redis-like system...

Software Engineering FundamentalsData Structure DesignCaching
1
0
25 people solved
Jan 23, 2026
Jump Trading logo
Jump Trading
Hard
Software Engineer Locked

Accelerate Tree-Model Inference

You must reduce inference latency and raise throughput for a deployed boosted-tree model without changing its predictions. Cover data and labels, leak...

Machine Learning
7
0
82 people solved
Aug 6, 2026
Snowflake logo
Snowflake
Hard
Software Engineer Locked

Discuss a Proud Project, Conflict, Challenge, and Team Advice

Develop concrete behavioral stories about a proud project, a substantive conflict, a major challenge, advice for the current team, and motivation for ...

Behavioral & Leadership
7
0
74 people solved
Jun 9, 2026
Lead Bank logo
Lead Bank
Medium
Software Engineer Locked

Design Room-Level Hotel Reservations Without Double Booking

Explore a room-level hotel reservation design where searches may be stale but overlapping stays can never both be confirmed. The discussion covers hal...

System Design
3
0
45 people solved
Jul 8, 2026
TCS logo
TCS
Medium
Software Engineer

Find the Period of a Perfect Interleaving

Problem Begin with the identity permutation of even length n. In each operation create a new array: at even index i take the previous entry at i/2; at...

Coding & AlgorithmsMath & Number TheorySimulation & State Machines
1
0
11 people solved
Confluent logo
Confluent
Medium
Software Engineer

Rank songs by pairwise user preferences

You are given preference rankings for n users over m songs. Each song is labeled from 0 to m - 1. For each user i (0-indexed), you are given an array ...

Coding & AlgorithmsSorting
42
0
291 people solved
Nov 30, 2025
Salesforce logo
Salesforce
Medium
Product Manager

Planning Data Integration and Governance After a Healthcare Acquisition

You lead product at a healthcare services provider that has just bought a startup. Lay out how you would build one data strategy for the combined orga...

Product Design & StrategyProduct StrategyPrivacy & Compliance
1
0
8 people solved
Jul 10, 2026
Meta logo
Meta
Medium
Software Engineer

Design a Real-Time Trending Hashtags System

Design the backend system that detects and serves trending hashtags from posts on a large social network (Facebook-scale). The service continuously in...

System Design
7
0
56 people solved
Mar 6, 2026
LinkedIn logo
LinkedIn
Medium
Data ScientistIntern

Explain Logistic Regression, Backprop, and Adam

Walk through the mathematical foundations that connect logistic regression to modern deep-learning training. The interviewer expects you to write the ...

Machine LearningNeural Networks & TrainingRegression & Statistical Modeling
173
0
1321 people solved
Apr 5, 2026
Ramp logo
Ramp
Medium
Software Engineer Locked

Design a banking system with payments and merging

This question evaluates competency in large-scale system design for financial backends, covering distributed transactions, consistency and idempotency...

System DesignPayments & LedgersDistributed Transactions & Idempotency
114
0
796 people solved
Jan 22, 2026
ZipHQ logo
ZipHQ
Hard
Software Engineer

Design in-memory DB with TTL and history

In-Memory Database: Progressive Design in 4 Levels You are designing a simplified in-memory database to be implemented in four progressive levels. Eac...

System DesignData Structure Design
87
0
644 people solved
Sep 6, 2025
eBay logo
eBay
Medium
Software Engineer

Rebuild a Binary Tree from Two Traversals and Serialize It Level by Level

You are given two integer arrays, preorder and inorder, that hold the preorder and inorder traversals of the same binary tree. Every node value in the...

Coding & AlgorithmsTrees
2
0
39 people solved
May 8, 2026
Oracle logo
Oracle
Medium
Software EngineerSenior+ Locked

Design an Internal Metrics Ingestion Service

Design an internal metrics-ingestion service, covering client agents, sharding, availability, and separation of write ingestion from query serving.

System Design
5
0
46 people solved
Aug 14, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+

Maximum Profit From a Single Buy Followed by a Later Sell

You are given the price of one stock on each of a sequence of days: prices[i] is the price on day i. You may buy one share on some day and sell it on ...

Coding & AlgorithmsArrays & Strings
1
2
16 people solved
Apr 6, 2026
Applied Intuition logo
Applied Intuition
Hard
Machine Learning Engineer

Validate Nested Configuration Objects

You are given a set of custom descriptor objects that define the expected schema of a configuration object. Implement a validator that checks whether ...

Coding & Algorithms
6
0
110 people solved
Jan 12, 2026
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