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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
Google logo
GoogleMetaMicrosoftAmazon

Also asked at Microsoft, Amazon

Easy
Software Engineer

Return Indices of Words Containing a Given Character

Return Indices of Words Containing a Given Character You are given a 0-indexed array of strings words and a character x. Return an array containing th...

Coding & AlgorithmsArrays & Strings
0
0
7 people solved
Apple logo
Apple
Easy
Software EngineerSenior+

Design APIs for a Voting System

Design APIs for a Voting System Design the APIs and core data model for a voting system. Begin by clarifying the type of vote: identified or anonymous...

System Design
11
0
134 people solved
May 3, 2026
Amazon logo
Amazon
Easy
Data Engineer

Solve Two String Problems

You are asked to solve the following two coding problems: 1. Unique Morse Code Transformations You are given an array of lowercase English words, word...

Coding & AlgorithmsString AlgorithmsArrays & Strings
39
0
300 people solved
Feb 23, 2026
Robinhood logo
Robinhood
Medium
Software Engineer

Design a Task Scheduler and Executor

Design a Task Scheduler and Executor Design a service that accepts tasks for future or recurring execution and dispatches them to workers. Constraints...

System DesignJob Scheduling & WorkflowsDistributed Transactions & Idempotency
19
1
157 people solved
Apr 21, 2026
Google logo
Google
Medium
Software EngineerSenior+ Locked

Design a large-scale distributed rate limiter

This question evaluates system design competency in distributed systems, focusing on scalability, multi-tenant isolation, rate-limiting algorithms, co...

System DesignRate LimitingPartitioning & Consistent Hashing
21
0
223 people solved
Jan 12, 2026
Intuit logo
Intuit
Medium
Software EngineerSenior+

Add an LLM-backed recommendation API to an existing service with RAG and prompting

In a 30-minute round late in the onsite, you add an AI feature to the service you built earlier in the loop. The service can already call an open-sour...

ML System DesignPrompt EngineeringLLM Applications
2
0
27 people solved
Dec 31, 2025
Anthropic logo
Anthropic
Hard
Software EngineerSenior+

Lead a Project Retrospective Discussion

Lead a Project Retrospective Discussion Walk through a significant past project as a retrospective. Explain the hardest part, how the team addressed i...

Behavioral & Leadership
5
0
105 people solved
Apr 16, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Implement topological sort and tree boundary traversal

You are given two separate coding tasks. Problem A — Order courses with prerequisites You have n courses labeled 0..n-1 and a list of prerequisite pai...

Coding & AlgorithmsGraphsTrees
36
0
634 people solved
Feb 12, 2026
Fetch Rewards logo
Fetch Rewards
Medium
Data Scientist

Design analysis to validate reported decline

A beverage company claims 'Q2 sales dropped' but gives you only one dataset (the transactions table described above) and 45 minutes. Design the analys...

Analytics & ExperimentationMetric DiagnosticsMetrics & KPIs
20
0
155 people solved
Oct 13, 2025
Citadel logo
Citadel
Medium
Data Scientist

Update No-Intercept Regression Slopes Across Batches

Data arrives in M batches. Each x_batches[b] and y_batches[b] is a matrix with the same number N of columns and the same number of rows within batch b...

Coding & Algorithms
6
0
68 people solved
Apr 15, 2026
Meta logo
MetaInfosysBloomberg

Also asked at Bloomberg, Google, Microsoft, Amazon

Hard
Software Engineer

Count Disjoint Subsequence Pairs with Equal GCD

Count Disjoint Subsequence Pairs with Equal GCD Problem Given a positive integer array nums, count ordered pairs of nonempty subsequences (seq1, seq2)...

Coding & AlgorithmsDynamic ProgrammingMath & Number Theory
1
0
13 people solved
Netflix logo
Netflix
Medium
Data Scientist

Aggregate D1 retention cohorts in SQL

Today is 2025-09-01. Using SQL (optionally outline a pandas approach too), compute daily engagement and D1 retention for the last 7 days (2025-08-26 t...

Data Manipulation (SQL/Python)SQLSegmentation & Cohort Analysis
16
0
202 people solved
Oct 13, 2025
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Why Work on AI Safety

Build a mission-driven AI-safety answer that connects concrete risks, engineering controls, personal contribution, and honest uncertainty.

Behavioral & Leadership
8
0
119 people solved
Aug 28, 2026
Amazon logo
Amazon
Easy
Data Scientist

Answer Amazon-style behavioral questions

You are interviewing for a role at Amazon and are asked the following behavioral questions. Answer each using the STAR method (Situation, Task, Action...

Behavioral & LeadershipMotivation & FitLeadership & Influence
122
0
850 people solved
Feb 13, 2026
Meta logo
MetaGoogle
Hard
Software Engineer

Kth Distinct Palindromic Rearrangement

Problem You are given a lowercase English palindrome s and a positive integer k. Consider all distinct palindromic strings formed by rearranging exact...

Coding & AlgorithmsArrays & StringsMath & Number Theory
0
0
6 people solved
Mistral AI logo
Mistral AI
Hard
Software Engineer

Design a PDF-to-Markdown Inference API

Problem Statement Design an inference service that converts PDF files into Markdown. Assume the following building blocks already exist and you do not...

ML System DesignGPU InfrastructureMessaging & Event-Driven
72
0
1189 people solved
Apr 16, 2026
Pinduoduo logo
Pinduoduo
Medium
Software Engineer

Longest Single-Letter Substring After at Most k Character Changes

You are given a string s of uppercase English letters and an integer k. You may perform at most k operations; each operation changes one character of ...

Coding & AlgorithmsTwo Pointers & Sliding Window
1
0
19 people solved
Jul 17, 2026
Snapchat logo
Snapchat
Hard
Software Engineer

Solve Three Algorithmic Tasks

You were asked three coding problems: 1. Count events inside a time window - You are given an initial collection of event timestamps in HH:MM:SS fo...

Coding & Algorithms
10
0
82 people solved
Mar 18, 2026
NVIDIA logo
NVIDIA
Medium
Product Manager

Walk through the loss, offline and online metrics behind an ML model you worked on

Pick a model from a product you worked on. Which metrics did you use to train it, and which did you use to evaluate it? `hint Count the layers Ask wha...

Machine LearningMetrics & KPIsModel Evaluation
0
0
12 people solved
Jun 2, 2026
Datadog logo
Datadog
Hard
Machine Learning Engineer Locked

Implement Grouped-Query Attention (GQA)

This question evaluates a candidate's understanding of transformer attention mechanisms, specifically how grouped-query attention balances the memory ...

Machine LearningTransformers & AttentionML Coding
18
0
131 people solved
Jun 25, 2026
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