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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Roblox logo
Roblox
Medium
Data Scientist

How to estimate a feature’s causal impact on time spent

You work on a Roblox-like game platform. A new product change ("feature") is rolled out and you want to estimate its causal impact on user engagement,...

Analytics & ExperimentationCausal InferenceRegression & Statistical Modeling
13
0
237 people solved
Jan 13, 2026
Zoox logo
Zoox
Medium
Data Scientist

Compute posterior for biased coin after 3H1T

You are given a coin known to be biased: one face lands with probability 2/3 and the other with probability 1/3, but you do not know whether Heads is ...

Statistics & MathBayesian Statistics
20
0
395 people solved
Oct 13, 2025
Citadel logo
Citadel
Easy
Software Engineer Locked

Implement LRU/LFU cache with custom eviction

This question evaluates proficiency in cache design and data-structure implementation, focusing on eviction policies (LRU, LFU), metadata tracking for...

Coding & AlgorithmsData Structure Design
30
0
289 people solved
Feb 11, 2026
Upstart logo
Upstart
Easy
Data Scientist Locked

Identify binomial model and compute moments

This question evaluates understanding of probability distributions and independence by identifying the binomial model and computing its probability ma...

Statistics & MathProbability
13
0
147 people solved
Oct 13, 2025
Salesforce logo
Salesforce
Medium
Software Engineer

Take Ownership Beyond Your Assigned Responsibilities

Prompt Describe a time you voluntarily took responsibility beyond your original assignment because an important project outcome was at risk. Explain w...

Behavioral & Leadership
2
0
29 people solved
Apr 11, 2026
Airbnb logo
Airbnb
Medium
Software Engineer

Check inorder subsequence and edit tree minimally

Given a binary tree whose nodes store integers and an array target, determine whether target is a subsequence of the tree's inorder traversal (element...

Coding & AlgorithmsTreesDynamic Programming
26
1
241 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Software EngineerIntern

Describe Deadline, Mistake, Problem-Solving, and AI Experiences

You are interviewing for a Software Engineer (Intern) role at Amazon, in an on-site loop of two back-to-back 60-minute rounds. Each round mixes a beha...

Behavioral & LeadershipOwnership & ExecutionAI-Assisted Development
30
0
477 people solved
Apr 20, 2026
Ge logo
Ge
Medium
Software Engineer

Count visible people to the right

Problem You are given an array heights of length n, where heights[i] is the height of the i-th person standing in a line from left to right. For each ...

Coding & Algorithms
6
0
50 people solved
Feb 11, 2026
Google logo
Google
Hard
Software Engineer Locked

Design street-view image ingestion and storage system

This question evaluates understanding of large-scale system design for media ingestion, covering distributed ingestion pipelines, durable storage and ...

System DesignFile & Media StorageAuthentication & Authorization
28
0
310 people solved
Jan 22, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Describe your most impactful recent project

Question Walk me through your most impactful (or proudest) recent project. Be ready to go deep on the technical details and the decisions you made. 1....

Behavioral & Leadership
5
0
88 people solved
Sep 6, 2025
DoorDash logo
DoorDash
Medium
Software Engineer

Debug round-robin request router

Debug round-robin request router Round-Robin Request Router with Health and Dynamic Membership You are given a list of backend servers and an incoming...

System DesignDebuggingData Structure Design
42
1
512 people solved
Aug 9, 2025
Anthropic logo
Anthropic
Hard
Software Engineer Locked

Design a high-concurrency LLM inference service

This question evaluates a candidate's ability to design a high-concurrency LLM inference platform, assessing competencies in GPU utilization and memor...

ML System DesignLLM Inference & Serving
66
0
539 people solved
Feb 11, 2026
Meta logo
Meta
Medium
Software EngineerSenior+ Locked

Design Search And Web Crawling Systems

This question evaluates system-design and distributed-systems competencies including large-scale indexing and query-serving, relevance ranking and per...

System Design
8
0
84 people solved
May 21, 2026
LinkedIn logo
LinkedIn
Medium
Machine Learning Engineer

Answer practical ML foundations questions

In an ML interview, you are asked a series of practical ML foundation questions: 1) Model outputs probabilities. When do you need probability calibrat...

Machine LearningModel EvaluationFeature Engineering
34
0
246 people solved
Feb 18, 2026
Snowflake logo
Snowflake
Hard
Software Engineer

Find Every Three-Card Set Among Cards With Four Attributes

A card game uses cards that each have four attributes: color, shape, number and shading. As in the standard version of the game, each attribute takes ...

Coding & AlgorithmsArrays & StringsMath & Number Theory
0
0
6 people solved
Jul 4, 2026
HubSpot logo
HubSpot
Hard
Software Engineer

Design a Netflix-like streaming platform

Question Design a Netflix-like video streaming platform. Viewers must be able to browse and search a catalog, stream titles with adaptive bitrate (ABR...

System DesignFile & Media StorageCaching
25
0
254 people solved
Jul 31, 2025
Microsoft logo
Microsoft
Medium
Machine Learning EngineerIntern

Return the k most frequent values in an array with a deterministic tie rule

Given an integer array nums and an integer k, return the k values that occur most often in nums. Rank the distinct values of nums by frequency (number...

Coding & AlgorithmsHeaps & Priority QueuesSorting
1
0
12 people solved
Feb 5, 2026
Meta logo
Meta
Medium
Software Engineer

Find Any Local Minimum with Iterative Binary Search

Find Any Local Minimum with Iterative Binary Search Given a nonempty integer array numbers, return the index of any local minimum. An index i is a loc...

Coding & Algorithms
1
0
24 people solved
Mar 2, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Apply bitwise tricks for performance

For an integer-heavy inner loop, propose bit-level optimizations that reduce branches and memory traffic: e.g., population count usage, fast modulo by...

Coding & AlgorithmsBit Manipulation
30
0
225 people solved
Sep 6, 2025
Google logo
Google
Hard
Machine Learning Engineer

Design a real-time recommendation system

You are asked to design a real-time recommendation system for a large-scale consumer product (for example, recommending items or content to users in a...

ML System DesignRecommendation SystemsRetrieval & Candidate Generation
30
0
287 people solved
Dec 8, 2025
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