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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.0k
Companies
570
Updated
10.05.2026
12.0k Questions 570 Companies10.05.2026
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
Microsoft logo
Microsoft
Medium
Software EngineerSenior+

Convert a Hexadecimal Address to Dotted IPv4

Convert a 32-bit hexadecimal address to dotted-decimal IPv4 notation. Implement hex_to_ipv4(text: string) -> string. Constraints & Assumptions The sou...

Coding & AlgorithmsParsing & InterpretersMath & Number Theory
0
0
16 people solved
Aug 30, 2026
Hudson River Trading logo
Hudson River Trading
Hard
Software Engineer Locked

Design an Indexable Deque with O(1) Access

This Hudson River Trading software engineering question asks candidates to design an indexable deque with constant-time access expectations. It is use...

Software Engineering FundamentalsData Structure Design
38
0
383 people solved
Jul 2, 2026
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
xAI logo
xAI
Medium
Machine Learning EngineerNew Grad

Explain Data Collection Choices and Their Impact on Downstream Model Performance

In a short screening call for a machine learning engineering role, after brief introductions, the interviewer asks you to explain the data side of a p...

Machine LearningML Data Pipelines & Feature StoresML Fundamentals
1
0
13 people solved
Sep 5, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Site Reliability Engineer Locked

Compare Python Generators, Decorators, and Context Managers

Compare Python generators, decorators, and context managers through their protocols and execution timing, then combine them in a synchronous lazy file...

Software Engineering Fundamentals
8
0
129 people solved
Aug 16, 2026
J.P. Morgan logo
J.P. Morgan
Medium
Software Engineer Locked

Reason About Top K Frequent Values at Scale

Explain top-k frequency counting with a bounded heap and extend it to key-partitioned local counting and global aggregation without inventing tie or o...

Software Engineering Fundamentals
5
0
45 people solved
Aug 17, 2026
Google logo
Google
Medium
Software Engineer

Environment Variable Store with %KEY% Placeholder Substitution

Implement a small environment-variable store with template substitution. The setting is a shell startup file such as .zshrc, where a line like export ...

Software Engineering FundamentalsParsing & InterpretersTesting & Quality
1
0
16 people solved
Sep 6, 2026
Jane Street logo
Jane Street
Medium
Software EngineerIntern

Bottom-Insertion Connect Game: Detect the First k-in-a-Row Winner

Two players, B and R, take turns dropping pieces onto a board that covers the upper half-plane of an integer grid. Columns are indexed by arbitrary in...

Coding & AlgorithmsSimulation & State Machines
28
0
417 people solved
Nov 6, 2025
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Debug Round-Robin and Consistent-Hash Routing

Debug faulty round-robin and consistent-hash routers by defining invariants and deterministic tests. Cover membership changes, concurrency, ring wrapa...

Software Engineering Fundamentals
8
0
84 people solved
Aug 2, 2026
Distyl logo
Distyl
Hard
Software Engineer Locked

Design a Grounded LLM Assistant for Case Preparation

Design a grounded LLM assistant that organizes legal-dispute documents and drafts case-preparation material for human review. Address matter isolation...

ML System Design
13
0
90 people solved
Jul 23, 2026
Datadog logo
Datadog
Medium
Software Engineer Locked

Design an LLM Agent System That Automatically Resolves Jira Tickets and Opens Pull Requests

This ML system design question evaluates the ability to architect an autonomous LLM-agent pipeline spanning retrieval-augmented generation, tool integ...

ML System DesignAI AgentsRetrieval-Augmented Generation
58
0
387 people solved
Jun 4, 2026
Perplexity logo
Perplexity
Medium
Software Engineer Locked

Implement Dependency-Aware To-Do List

This question evaluates the ability to design in-memory data structures and algorithms for representing tasks with directed dependencies, manage state...

Coding & Algorithms
19
0
141 people solved
May 29, 2026
Airbnb logo
Airbnb
Medium
Machine Learning EngineerSenior+

Explain ML Project Milestones, Scope, and Conflict

Describe an ML project you worked on, focusing on how you defined its scope, chose milestones, and handled a disagreement that affected delivery. Expl...

Behavioral & LeadershipProject Deep DiveConflict & Collaboration
2
0
15 people solved
Sep 4, 2026
Google logo
Google
Medium
Software Engineer Locked

Solve Three Array and Matrix Path Problems

This set of three problems evaluates algorithm design, complexity analysis, and data-structure reasoning across matrix path traversal, interval covera...

Coding & AlgorithmsGrids & MatricesDynamic Programming
20
3
245 people solved
May 30, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+ Locked

Design a Scalable Metrics Monitoring System

Design a scalable monitoring platform for metric ingestion, time-series storage, dashboards, ad hoc queries, and alert evaluation. Explore series iden...

System DesignObservabilitySystem Design Fundamentals
13
0
205 people solved
Jul 23, 2026
Amazon logo
Amazon
Medium
Software Engineer

Explain Decoder-Only LLM Architecture and How vLLM Serves It Efficiently

This question comes from an AI-infrastructure-focused software engineering loop in which both the machine learning round and the system design round c...

Machine LearningLLM Inference & ServingTransformers & Attention
2
0
16 people solved
Sep 5, 2026
DoorDash logo
DoorDash
Easy
Data ScientistSenior+

Measure Customers Ordering from Bottom-Quartile Restaurants

Measure Customers Ordering from Bottom-Quartile Restaurants Write one PostgreSQL SELECT statement or CTE query. Do not create, alter, or modify tables...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
8
1
127 people solved
Jul 27, 2026
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Schedule One-GPU and Eight-GPU Model Jobs

Design a fair eight-GPU scheduler for one-GPU and gang-scheduled eight-GPU jobs, with drain reservations, atomic allocation, and starvation prevention...

ML System Design
11
0
136 people solved
Aug 12, 2026
Jane Street logo
Jane Street
Medium
Software EngineerIntern

Evaluate Expressions with Strictly Positive Integer Intermediate Results

Evaluate a string arithmetic expression whose literals are positive integers and whose binary operators are +, -, *, and /. Return its integer value i...

Coding & AlgorithmsParsing & InterpretersBacktracking & Recursion
1
0
10 people solved
Aug 22, 2026
Databricks logo
Databricks
Medium
Software EngineerSenior+ Locked

Design Chat Deletion Semantics Under Concurrent Sends

Design deletion semantics for a chat backend when message sends and thread deletion race across servers. Define the visible consistency contract, line...

System DesignConsistency & AvailabilityReal-Time Systems
51
1
468 people solved
Jul 14, 2026
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