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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
Databricks logo
Databricks
Medium
Software Engineer Locked

Tic-Tac-Toe Against a Deterministic Automatic Opponent

Build an automated Tic-Tac-Toe opponent with perfect-play minimax, deterministic move ties, board events, invalid attempts, and terminal-state handlin...

Coding & AlgorithmsBacktracking & RecursionSimulation & State Machines
26
0
267 people solved
Sep 6, 2026
Microsoft logo
MicrosoftGoogleAmazon

Also asked at Amazon, Meta, Goldman Sachs, Zomato, Siemens, Bloomberg, Apple

Hard
Software Engineer

Construct Canonical Skyline Height-Change Points

Problem Return the skyline formed by rectangular buildings resting at height zero. A building is [left,right,height]. Represent the upper contour as k...

Coding & AlgorithmsIntervals & SchedulingHeaps & Priority Queues
3
0
34 people solved
Oracle logo
Oracle
Medium
Software Engineer

Object-Oriented Design of a Chess Game with Full Move Legality

Design a chess game. The report gives only this one-line prompt, so settle the scope with the interviewer first. In its usual object-oriented form: mo...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines
3
0
26 people solved
Oct 10, 2026
Reddit logo
Reddit
Medium
Machine Learning Engineer

Exclude Cat- or Dog-Related Comments and All Their Replies by Reader Mode

You are given the comments of a discussion thread. Every comment either replies to another comment, its parent, or is top-level, so the comments form ...

Coding & AlgorithmsTrees
5
0
96 people solved
Sep 7, 2026
OpenAI logo
OpenAI
Hard
Data Scientist

Evaluating a Frontier AI Model's Safety for a Government in a 30-Day Pre-Launch Window

You work for a government agency. An AI developer gives your agency access to each new model 30 days before the model's public launch. How would you e...

Machine LearningAI Safety & AlignmentLLM Evaluation
0
0
5 people solved
Nov 6, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Medium
Quantitative Trader

Bayesian Posterior That k Red Parts Came From Factory A

Two factories make the same part in two colors. Factory A's output is $a\%$ red and $(100-a)\%$ black. Factory B's output is $b\%$ red and $(100-b)\%$...

Statistics & MathProbabilityBayesian Statistics
3
0
75 people solved
Sep 19, 2026
Visa logo
Visa
Medium
Software EngineerNew Grad Locked

Fewest Terms to Write an Integer as 1, 2 or 3 Plus Even Powers of Two

For every integer in an array, find the fewest terms that sum to it when exactly one term is 1, 2 or 3 and every other term is a power of two with an ...

Coding & AlgorithmsMath & Number Theory
15
0
152 people solved
Sep 19, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Propagate Permission Letters Through a DAG Using Each Node's Final State

A permission system is modeled as a directed acyclic graph with n nodes, numbered 0 to n - 1. Permissions are single lowercase letters. An edge [u, v]...

Coding & AlgorithmsGraphs
10
0
141 people solved
Sep 15, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Debug a round-robin load balancer, then extend it to consistent hashing

In a debugging round you receive a small round-robin load balancer, which hands out the servers of a pool in turn, together with test cases that it cu...

Software Engineering FundamentalsDebuggingPartitioning & Consistent Hashing
0
0
7 people solved
Oct 28, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Banking System Simulation

Banking System Simulation You are building an in-memory banking system that is driven by a time-ordered stream of operations. Implement the system so ...

Coding & AlgorithmsData Structure DesignSimulation & State Machines
90
1
816 people solved
Jun 23, 2026
Stripe logo
Stripe
Medium
Software Engineer Locked

Parse and Format Arbitrarily Nested Tasks from CSV

Parse valid CSV records into an arbitrarily nested task forest and render deterministic tree lines while preserving quoted names, root order, sibling ...

Coding & AlgorithmsParsing & InterpretersTrees
142
2
1647 people solved
Aug 25, 2026
Uber logo
Uber
Hard
Software Engineer

Design the Data Flow Behind a Food Delivery App's Restaurant List

Design the data flow behind the restaurant list in a food delivery app such as Uber Eats. When a customer opens the app with a delivery address, the h...

System DesignGeo & Delivery SystemsCaching
4
0
70 people solved
Sep 29, 2026
NVIDIA logo
NVIDIA
Medium
Software EngineerSenior+

Design Scheduler Claims, Execution Guarantees, and Recovery

Design the reliability mechanisms for a distributed job scheduler with multiple executors. Address three questions: how to ensure a scheduled work ite...

System DesignJob Scheduling & WorkflowsDistributed Coordination
1
0
19 people solved
Oct 15, 2026
Cursor logo
Cursor
Medium
Software Engineer Locked

Design a CI/CD Job Scheduler

Design a multi-tenant CI/CD scheduler with dependency-aware jobs, fair resource placement, durable state, retries, and worker-loss recovery.

System Design
25
0
365 people solved
Aug 21, 2026
Abridge logo
Abridge
Hard
Software Engineer

Sum of Integers Up to n Divisible by 3, 5, or 7

Given a positive integer n, return the sum of every integer in the range [1, n] that is divisible by at least one of 3, 5 or 7. Function Signature `py...

Coding & AlgorithmsMath & Number Theory
13
0
92 people solved
Sep 24, 2026
xAI logo
xAI
Medium
Software Engineer Locked

Per-Key Fixed-Window Cost Limiter with ALLOW and RESET Commands

A coding problem about a cost-based rate limiter that processes ALLOW and RESET commands for many keys. Each key may spend a fixed budget per aligned ...

Coding & AlgorithmsData Structure DesignRate Limiting
29
2
208 people solved
Sep 5, 2026
NVIDIA logo
NVIDIA
Medium
Software EngineerSenior+

Hash-Partition an Array on the GPU in C++ and Return Partition Offsets

Implement hash partitioning on a GPU in C++. You are given an array of n keys and a number of partitions P; each key belongs to partition hash(key) % ...

Software Engineering FundamentalsGPU Programming
4
0
34 people solved
Oct 5, 2026
Amazon logo
AmazonTCSGoogle

Also asked at Google, Microsoft, Bloomberg, Meta, Oracle, ServiceNow, Goldman Sachs, Walmart Labs, EPAM Systems, Cognizant, Salesforce, Infosys, Zoho

Hard
Software Engineer

Find the First Absent Positive Integer

Problem The integer array values is unsorted and may include repeated values, zeroes, and negative numbers. Return the first absent positive integer: ...

Coding & AlgorithmsArrays & Strings
2
0
30 people solved
Databricks logo
Databricks
Medium
Software Engineer

Forward Deployed Engineer Screen: Role Fit, Client Work and Databricks Projects

This is a short recruiter screen, about 15 minutes by phone, for a Forward Deployed Engineer (FDE) role at Databricks, a data and AI platform company....

Behavioral & LeadershipMotivation & Fit
12
0
107 people solved
Sep 12, 2026
Databricks logo
Databricks
Medium
Frontend Engineer Locked

Design a Typeahead Search System

Design typeahead across client state and backend retrieval, including matching, ranking, cache keys, stale-response protection, permissions, and laten...

System DesignState ManagementRetrieval & Candidate Generation
5
0
100 people solved
Sep 15, 2026
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