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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
Lyft logo
Lyft
Medium
Machine Learning Engineer

Implement K-Means Clustering from Scratch in Plain Python or NumPy

Implement k-means clustering from scratch. The interviewer allows NumPy but not a ready-made clustering library, and plain Python is acceptable too. Y...

Machine LearningML CodingUnsupervised Learning
2
0
38 people solved
Jul 6, 2026
Anduril logo
Anduril
Medium
Software Engineer Locked

Design a Small-Scale URL Shortener with Collision Handling

Design an in-memory URL shortener that returns stable codes for repeated URLs and preserves every mapping through collisions. Work through open addres...

System Design
8
0
93 people solved
Aug 2, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

Design GPU credit allocator

Design a GPU Credit Allocation System Design a GPU credit allocation system for a multi-tenant compute platform (for example, OpenAI's GPU infrastruct...

System DesignGPU InfrastructurePayments & Ledgers
435
0
3306 people solved
Aug 4, 2025
Google logo
Google
Medium
Software EngineerSenior+

Design a System to Distribute Large ML Model Files Across a Serving Fleet

Design a system that distributes large model files, such as the trained weights of machine-learning models, to the machines that serve them. A trainin...

System DesignFile & Media StorageCI/CD & Deployment
4
0
34 people solved
May 8, 2026
Google logo
GoogleAtlassianMeta

Also asked at Meta, Amazon, MongoDB

Medium
Software Engineer

Correct and Query Timestamped Prices

Problem Implement a StockPrice object that records a stock price for each timestamp. update(timestamp, price) adds a record or corrects the price alre...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues
1
0
23 people solved
Snapchat logo
Snapchat
Hard
Machine Learning Engineer Locked

Choose Labels and Losses for Multiple Engagement Outcomes

Choose multi-label and multi-task losses using outcome semantics, conditional engagement funnels, missing-label masks, sampling, and calibration.

Machine LearningSupervised LearningModel Evaluation
4
0
32 people solved
Sep 9, 2026
ByteDance logo
ByteDance
Medium
Data Engineer Locked

Model Data for Analytics, Reporting, and Applications

Learn to model shared facts, dimensions, history, and metrics for analytics, reproducible reporting, and low-latency data applications.

Data Manipulation (SQL/Python)
9
0
78 people solved
Aug 28, 2026
Amazon logo
AmazonTCSGoogle

Also asked at Google, Meta, Infosys, Bloomberg, Microsoft, Qualcomm

Medium
Software Engineer

Locate a Guaranteed Mountain Peak Logarithmically

Problem arr is guaranteed to rise strictly to one interior peak and then fall strictly. Return the peak's zero-based index using O(log n) time. `cpp c...

Coding & AlgorithmsBinary Search
1
0
10 people solved
Amazon logo
Amazon
Medium
Software Engineer Locked

Simplify an Arithmetic Expression Tree with Constant Folding and Identities

Given the abstract syntax tree of an arithmetic expression as a binary tree, write a traversal that returns an equivalent simplified tree using consta...

Software Engineering FundamentalsTreesParsing & Interpreters
3
0
45 people solved
Sep 5, 2026
Close logo
Close
Medium
Software EngineerSenior+

Rate Your Own Python Skills on a 1-10 Scale and Justify the Number

A recruiter screen for a senior or staff software engineering role opens with introductions to the company and the position. The recruiter then asks y...

Behavioral & LeadershipMotivation & FitProgramming Languages
0
0
7 people solved
Oct 16, 2026
Vanta logo
Vanta
Medium
Software Engineer

Implement a uniq-like function

Implement a function similar to the Unix uniq utility. You are given a sequence of strings representing lines of text in the order they appear in a fi...

Coding & AlgorithmsTwo Pointers & Sliding Window
60
1
408 people solved
Feb 23, 2026
Virtu Financial logo
Virtu Financial
Hard
Quantitative Researcher Locked

Maximum Edges in a Triangle-Free Graph

Find the maximum number of edges possible in a triangle-free graph on n vertices. Practice extremal graph reasoning, a tight bipartite construction, a...

Coding & Algorithms
3
0
41 people solved
Aug 21, 2026
Cohere logo
Cohere
Medium
Frontend Engineer Locked

Build a Credit Card Form With Validation and Linked Input Fields

A front-end UI coding question: build a credit card form with card number, name, expiry and security code, where every field is validated and the fiel...

Software Engineering FundamentalsUI Components & AccessibilityState Management
3
0
54 people solved
Sep 22, 2026
Anthropic logo
Anthropic
Hard
Software Engineer

Design a Crash-Resilient LRU Cache

You have an in-memory LRU cache with fixed capacity $N$ and the standard get(key) / put(key, value) operations, both $O(1)$ (a hash map plus a doubly ...

System DesignDatabase InternalsCaching
135
0
1548 people solved
Jan 6, 2026
Snowflake logo
Snowflake
Medium
Machine Learning Engineer Locked

Core Components of LLM Agent Memory: What Each Stores and How It Is Written and Read

Explain the common components of an LLM agent's memory, from the context window to session, episodic, semantic and procedural memory, and how each is ...

Machine LearningAI AgentsLLM Applications
3
0
42 people solved
Sep 7, 2026
Datadog logo
Datadog
Medium
Software Engineer Locked

Match Registered Word Queries Against a Log Stream

Process an ordered stream that registers word queries and reports which prior queries fully match each log message. The specification fixes query IDs,...

Coding & Algorithms
7
0
150 people solved
Jun 30, 2026
Reddit logo
Reddit
Medium
Machine Learning EngineerSenior+ Locked

Design Comment Prediction Ranking System

This question evaluates proficiency in end-to-end machine learning system design for predicting user engagement, specifically the probability of a use...

ML System DesignRanking Models
22
0
265 people solved
Jun 4, 2026
Google logo
Google
Medium
Software Engineer Locked

Design Extensible Spreadsheet Aggregation APIs

Design reusable spreadsheet sum, minimum, and maximum APIs with operator state, shared cell evaluation, error policies, and extensible aggregation.

Software Engineering FundamentalsLow-Level Design (OOP)Code Quality & Maintainability
3
0
69 people solved
Sep 18, 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
11
0
108 people solved
Apr 9, 2026
AMD logo
AMD
Medium
Software Engineer Locked

Explain the ReAct Agent Loop

Explain a ReAct tool loop through state, action selection, observations, recovery, stopping criteria, and validation of task completion.

Machine LearningAI AgentsPrompt Engineering
1
0
23 people solved
Sep 14, 2026
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