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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
Anthropic logo
Anthropic
Medium
Software Engineer Locked

In-Memory Key-Value Database with Nested Transactions

This question evaluates a candidate's ability to design a data structure that layers transactional state over a committed base, testing skills in nest...

Coding & Algorithms
24
0
156 people solved
Jun 23, 2026
Lyft logo
Lyft
Medium
Software EngineerSenior+

Minimum Window Substring with Repeated Required Characters

Implement minimum_window(s, t) to return the shortest contiguous substring of s containing every character in t with at least its required multiplicit...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
3
0
36 people solved
Sep 8, 2026
Tesla logo
Tesla
Easy
Software Engineer

Handle API Errors with Python Requests

Use Python's requests library to call API endpoints and handle failures. Show how your client would handle HTTP 4xx and 5xx responses, retry a 429 res...

Software Engineering FundamentalsAPI Integration & HTTP ClientsDistributed Transactions & Idempotency
3
0
28 people solved
Sep 4, 2026
Cresta logo
Cresta
Easy
Software Engineer

Productionize a Successful Proof of Concept

Productionize a Successful Proof of Concept Explain how you would take a successful proof of concept into production. The prototype demonstrates feasi...

System Design
4
0
45 people solved
Aug 20, 2026
Snapchat logo
Snapchat
Hard
Machine Learning Engineer

Explain Vanishing Gradients in Neural-Network Training

Explain Vanishing Gradients in Neural-Network Training What is the vanishing-gradient problem, why can it occur when training a neural network, and wh...

Machine LearningNeural Networks & Training
1
0
14 people solved
Sep 12, 2026
Google logo
Google
Medium
Software Engineer Locked

Design a Billing-Token Rate Limiter for AI Agents

Design a rate limiter that controls the number of billing tokens consumed by AI-agent requests. Connect requirements and APIs to data modeling, consis...

System DesignRate LimitingDistributed Transactions & Idempotency
27
0
404 people solved
Aug 1, 2026
Sierra logo
Sierra
Hard
Software Engineer

Split Markdown Into Header-Aware Chunks

Implement a function that splits a Markdown document into ordered chunks, where each chunk must not exceed a given size limit. A Markdown header is a ...

Coding & AlgorithmsParsing & InterpretersArrays & Strings
24
0
352 people solved
Apr 3, 2026
Datadog logo
Datadog
Easy
Software EngineerSenior+

Engineering Manager Interview: Your Technical Contribution and an Annoying Teammate

You are interviewing for an engineering manager role. After the recruiter call, the next step is a one-hour conversation with the hiring manager, and ...

Behavioral & LeadershipLeadership & InfluenceConflict & Collaboration
2
0
22 people solved
Sep 5, 2026
OpenAI logo
OpenAI
Medium
Machine Learning Engineer

Compute entropy and implement 1-NN

You are given two short ML coding problems from a machine-learning engineer screen. Both are implementation-focused but probe whether you understand t...

Machine LearningML Coding
173
2
1645 people solved
Apr 24, 2026
Uber Freight logo
Uber Freight
Medium
Software Engineer

Low-Level Design of an In-Memory File System with mkdir and ls

Design a basic file system that supports two operations, mkdir and ls. The interviewer cares about the design and the approach rather than complete ru...

Software Engineering FundamentalsLow-Level Design (OOP)Trees
0
0
6 people solved
Sep 25, 2026
Google logo
Google
Hard
Data Analyst

Investigate a Decrease in Webpage Warnings

Investigate a Decrease in Webpage Warnings A system that warns users about malicious webpages shows a decrease in the number of warnings displayed. Ho...

Analytics & ExperimentationMetric DiagnosticsData Quality & Validation
0
0
14 people solved
Sep 9, 2026
Scale AI logo
Scale AI
Easy
Software Engineer AI

Design a Streaming Job Scheduler

Design and incrementally build a streaming job scheduler: a service (and supporting class) that continuously ingests tasks and dispatches them to work...

System DesignJob Scheduling & WorkflowsGraphs
255
1
2233 people solved
Apr 9, 2026
Chime logo
Chime
Medium
Data Scientist

Define and Analyze Early Engagement

Define and Analyze Early Engagement A product team has a users dataset and a transactions dataset. The team asks how to define early engagement, compu...

Data Manipulation (SQL/Python)Metrics & KPIsSegmentation & Cohort Analysis
6
0
90 people solved
Aug 17, 2026
Databricks logo
Databricks
Hard
Software EngineerSenior+ Locked

Design a Write-Ahead Log Writer with Batch Writes

Design a concurrent write-ahead-log writer that assigns ordered positions, groups records into bounded batches, and states exactly when durability is ...

Software Engineering FundamentalsDatabase InternalsConcurrency
22
0
171 people solved
May 10, 2026
NVIDIA logo
NVIDIA
Medium
Applied ScientistIntern

How AI Agents Fit Into Your Research Workflow: Ideas, Experiments, and Paper Writing

In a research internship interview, you are asked how AI agents have changed your research. Describe your current day-to-day research workflow across ...

Behavioral & LeadershipEthics & ResponsibilityAI Agents
0
0
11 people solved
Sep 17, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Implement the Linux cp Command, Then Explain Its OS and C++ Internals

How would you implement the Linux cp command? Write it, then be ready for the discussion to go deep into the operating-system and C++ concepts underne...

Software Engineering FundamentalsOperating SystemsProgramming Languages
2
0
16 people solved
Sep 6, 2026
Amazon logo
Amazon
Hard
Software Engineer Locked

Responding to a Difficult Engineering Challenge

Build a concrete behavioral answer about diagnosing and resolving a difficult engineering challenge under uncertainty. The prompt probes personal cont...

Behavioral & Leadership
13
0
95 people solved
Aug 30, 2026
Scale AI logo
Scale AI
Easy
Backend Engineer Locked

Design a Durable Task Scheduling Service

Design a durable distributed scheduler for one-time and recurring tasks while keeping scheduling separate from execution. Define lifecycle and time se...

System DesignJob Scheduling & WorkflowsDistributed Coordination
29
1
237 people solved
Jul 27, 2026
Google logo
Google
Medium
Software EngineerNew Grad

Solve Two Coding Interview Problems

You are asked to solve two independent coding problems. Problem 1: Evaluate Nested Math Expressions Implement a function that evaluates a string expre...

Coding & Algorithms
12
0
140 people solved
Apr 8, 2026
Siemens logo
Siemens
Medium
Machine Learning EngineerSenior+

Discuss Post-Training Ownership, Failure, and Disagreement

Discuss your experience with language-model post-training through three concrete work examples: a project you owned end to end, a failure, and a disag...

Behavioral & LeadershipProject Deep DiveConflict & Collaboration
2
0
19 people solved
Sep 4, 2026
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