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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."

Blind 75Free
Showing 20 results
Millennium logo
Millennium
Medium
Software EngineerIntern

How a C++ Mutex Protects Shared State

How does a mutex work in C++, and what must an application do for it to protect shared state correctly? Explain the language-level guarantee, a possib...

Software Engineering FundamentalsConcurrencyProgramming Languages
2
0
31 people solved
Apr 26, 2026
Citadel logo
Citadel
Medium
Software Engineer

Compute max team size with a core interval

You are given n employees’ working-time intervals, where employee i works during the inclusive interval [startTime[i], endTime[i]]. You want to form a...

Coding & AlgorithmsIntervals & SchedulingMath & Number Theory
22
0
283 people solved
Dec 25, 2025
Agoda logo
Agoda
Easy
Data EngineerSenior+

Sum Employee Working Time from Ordered Check-In and Check-Out Events

Compute each employee's total working duration by pairing every check-out event with that employee's immediately preceding check-in event. Input Table...

Data Manipulation (SQL/Python)SQL
2
0
15 people solved
Sep 11, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Design an object store with deduplication

System Design Prompt Design a simplified cloud object storage service (similar to an object store) that allows users to upload and download files. The...

System DesignFile & Media Storage
59
1
476 people solved
Dec 15, 2025
OpenAI logo
OpenAI
Medium
Machine Learning Engineer Locked

Simulate Turn-Based Monster Battles

This question evaluates the ability to implement a turn-based battle simulation with correct state management, turn semantics, knockout handling, dama...

Coding & AlgorithmsSimulation & State MachinesData Structure Design
24
0
199 people solved
Mar 9, 2026
Harvey logo
Harvey
Medium
Software Engineer Locked

Implement retrieval and evaluation for a simple RAG

This question evaluates understanding of embedding-based retrieval, cosine similarity ranking, and retrieval evaluation metrics (Recall@10 and MRR@10)...

Coding & AlgorithmsRetrieval-Augmented GenerationEmbeddings & Vector Search
17
0
226 people solved
Mar 1, 2026
ZipHQ logo
ZipHQ
Medium
Software Engineer

Implement a Vending Machine

Design and implement the core logic for a vending machine using object-oriented principles. The machine stores products, accepts bills, tracks the cur...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines
45
0
400 people solved
Jan 28, 2026
Google logo
Google
Hard
Software EngineerNew Grad Locked

Compute Turnstile Crossing Times

This question evaluates proficiency in queue simulation, event-driven scheduling, and handling priority and tie-breaking rules while achieving linear ...

Coding & AlgorithmsSimulation & State MachinesStacks & Queues
9
1
102 people solved
May 4, 2026
Voleon logo
Voleon
Medium
Software Engineer

Count queen attacks on points with blockers

You are given positions on an (unbounded) 2D integer grid. - queens: coordinates of queens - points: query coordinates A queen attacks along 8 directi...

Coding & AlgorithmsBinary Search
68
0
509 people solved
Dec 9, 2025
Squarepoint logo
Squarepoint
Medium
Risk Technology Software EngineerSenior+ Locked

Concatenate Two C++ Index Sequences at Compile Time

Create a compile-time C++ utility that concatenates two index-sequence packs unchanged through variadic-template specialization, a convenient alias, a...

Software Engineering Fundamentals
1
0
21 people solved
Aug 16, 2026
Amazon logo
Amazon
Medium
Software EngineerNew Grad Locked

Minimum Drone Delivery Time on a Ring of Hubs

This question tests a candidate's grasp of circular graph traversal and greedy distance minimization on ring-structured topologies. It evaluates algor...

Coding & Algorithms
5
0
46 people solved
Jun 15, 2026
Waymo logo
Waymo
Easy
Data Scientist

Compare two rare-event detection models statistically

You are evaluating two models (Model A and Model B) for rare-event detection (e.g., fraud, abuse, medical adverse event). Positives are extremely rare...

Machine LearningHypothesis TestingModel Evaluation
77
1
690 people solved
Jan 17, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+ Locked

Resolve a Conflict Between Metrics and Customer Feedback

Analyze a decision where quantitative metrics and direct customer feedback appeared to disagree. Check instrumentation, segmentation, timing, and samp...

Analytics & Experimentation
3
0
48 people solved
Aug 22, 2026
Visa logo
Visa
Medium
Software EngineerNew Grad

Solve Three Array Coding Problems

An online assessment contains the following three independent coding problems. For each problem, write a function that returns the requested value. Us...

Coding & AlgorithmsArrays & StringsDynamic Programming
13
0
162 people solved
Apr 5, 2026
Langchain logo
Langchain
Medium
Software EngineerSenior+ Locked

Optimize Object-Backed APIs and Design an LLM Observability Platform

A two-part system-design interview about reducing latency in object-backed JSON APIs and building an LLM observability platform. It emphasizes measure...

System Design
4
0
71 people solved
Jun 12, 2026
Garner Health logo
Garner Health
Medium
Software Engineer

Design a Doctor Appointment Booking System for Sudden Demand

Design a Doctor Appointment Booking System for Sudden Demand Design a system where patients search for doctors, view available time slots, book appoin...

System Design
4
0
42 people solved
Apr 9, 2026
Atlassian logo
Atlassian
Medium
Software Engineer

Design a trie-based URL router with wildcards

Design a trie-based URL router with wildcards Implement a URL routing matcher that supports adding route patterns and matching request paths, using a ...

Coding & AlgorithmsData Structure DesignTrees
56
1
398 people solved
Jul 31, 2025
Google logo
Google
Medium
Software Engineer Locked

Solve Flower Placement and Directory Deletion

This question evaluates combinatorial constraint-satisfaction and permutation/matching skills for the flower-placement grid alongside filesystem trave...

Coding & AlgorithmsGrids & MatricesBacktracking & Recursion
8
0
115 people solved
May 8, 2026
Google logo
Google
Medium
Software Engineer Locked

Find the Longest Path of Equal-Valued Tree Nodes

Find the longest path of equal-valued nodes in a binary tree encoded as a breadth-first list. Clarify the ambiguity with strict BST terminology, then ...

Coding & Algorithms
7
0
69 people solved
Jun 11, 2026
Lyft logo
Lyft
Medium
Software Engineer

Design a Distributed Web Crawler

Question Design a distributed web crawler. Starting from one or more seed URLs, it fetches the pages it is permitted to fetch, stores a snapshot and m...

System Design
14
0
116 people solved
May 1, 2026
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