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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
Perplexity logo
Perplexity
Hard
Software Engineer

Implement resilient LLM provider pool

System Design Task: Resilient Multi‑Provider LLM Client Library Context You are designing a client library used by backend services to call external L...

ML System DesignLLM ApplicationsAPI Integration & HTTP Clients
14
0
238 people solved
Aug 13, 2025
Netflix logo
Netflix
Medium
Machine Learning Engineer

Explain tokenization and Transformer variants

Tokenization and Transformer Architecture Deep Dive You are asked to explain common tokenization approaches and modern Transformer design choices used...

Machine LearningTransformers & AttentionNatural Language Processing
11
0
153 people solved
Aug 13, 2025
Coinbase logo
Coinbase
Medium
Software Engineer

Design account system with cashback

Design account system with cashback System Design: Account Management with Transfers, Payments, and Cashback You are to design and implement an in-mem...

System DesignData Structure DesignConcurrency
101
1
443 people solved
Jul 29, 2025
Meta logo
Meta
Medium
Software Engineer AI

Extend a Maze Solver

You are given an existing codebase for a maze game and solver. The maze is represented as a 2D grid containing: - S: start cell - T: target cell - .: ...

Coding & Algorithms
7
0
67 people solved
Jan 6, 2026
Akuna Capital logo
Akuna Capital
Hard
Data Scientist

Find minimum swaps to sort array with duplicates

Problem Given an integer array nums of length n that may contain duplicate values, you may perform swaps where you choose any two indices i and j and ...

Coding & AlgorithmsSortingGraphs
10
0
207 people solved
Dec 27, 2025
Tesla logo
Tesla
Medium
Machine Learning Engineer

Implement and vectorize NumPy Conv2D

Implement a 2D convolution operation from scratch using NumPy only (no TensorFlow or PyTorch). Assume NCHW input shape (N, C_in, H_in, W_in) and weigh...

Data Manipulation (SQL/Python)
5
0
59 people solved
Sep 6, 2025
Sigmacomputing logo
Sigmacomputing
Easy
Software Engineer

Implement a basic pivot table with totals

You are given a small in-memory table of data and are asked to implement a simplified pivot table operation and a printer for it. Assume the input dat...

Coding & AlgorithmsData Structure Design
9
0
139 people solved
Nov 20, 2025
Apple logo
Apple
Medium
Machine Learning Engineer Locked

Debug a PyTorch U-Net shape mismatch

This question evaluates proficiency in PyTorch model implementation, convolutional output shape arithmetic, channel configuration, and debugging of U-...

Coding & AlgorithmsML CodingComputer Vision
19
0
192 people solved
Mar 1, 2026
Databricks logo
Databricks
Hard
Software Engineer Locked

Design a multi-threaded synchronous log writer

This question evaluates a candidate's understanding of concurrent programming, durable I/O, synchronization primitives, ordering guarantees, and syste...

Software Engineering FundamentalsConcurrencyOperating Systems
33
0
600 people solved
Feb 12, 2026
Google logo
Google
Medium
Software EngineerSenior+ Locked

Discuss Challenges, Difficult Colleagues, and Multitasking

Prepare concrete behavioral stories about a major challenge, a difficult working relationship, and competing priorities. Show your decision process, r...

Behavioral & Leadership
9
0
72 people solved
Jul 17, 2026
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Restore Valid Addresses by Splitting a Digit String

Split a digit string into exactly k valid zero-to-255 segments, reject leading zeros, prune impossible branches, and return every dotted result in lex...

Coding & Algorithms
1
0
24 people solved
Aug 10, 2026
Plaid logo
Plaid
Medium
Software Engineer

Explain project scope, timeline, and delegation

10–15 Minute Project Deep Dive (Behavioral and Leadership in a Technical Screen) Context You are asked to present a concise, slide-driven deep dive on...

Behavioral & LeadershipProject Deep DiveOwnership & Execution
23
1
307 people solved
Sep 6, 2025
Lyft logo
Lyft
Medium
Software EngineerIntern

Implement Cache and Key-Value Store

The interview report mentions coding tasks similar to the following: 1. Bounded cache Implement a cache with a fixed capacity. Support: - get(ke...

Coding & Algorithms
5
1
112 people solved
Oct 5, 2025
Google logo
Google
Easy
Data Scientist Locked

Design an A/B test for search ranking

This question evaluates a data scientist's competency in online experimentation, causal inference, product analytics, and operational metrics engineer...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
60
0
503 people solved
Feb 7, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Design an LLM-based binary classifier

Design a Binary Text Classifier Using Only a Log-Probability Scoring Helper Context You are building a binary text classifier without fine-tuning. You...

ML System DesignLLM ApplicationsPrompt Engineering
38
0
711 people solved
Sep 6, 2025
Chicago Trading Company logo
Chicago Trading Company
Medium
Software Engineer Locked

Trace Virtual Address Translation Through TLBs, Page Tables, and Caches

Trace a memory load through virtual-address decomposition, a TLB hit, and a multi-level page-table walk after a miss. Distinguish translation caching ...

Software Engineering Fundamentals
3
0
39 people solved
Jul 1, 2026
PayPal logo
PayPal
Medium
Software Engineer

Minimize a String Using Allowed Swaps

You are given a string s of lowercase English letters and an array pairs, where each element pairs[i] = [a, b] means you may swap the characters at in...

Coding & Algorithms
9
0
62 people solved
Apr 14, 2026
Meta logo
Meta
Medium
Software Engineer

Solve Array Merge and Parentheses Cleanup

You are asked to solve two coding problems. Problem 1: Merge Three Sorted Arrays Given three integer arrays, each sorted in nondecreasing order, merge...

Coding & Algorithms
2
0
27 people solved
Apr 29, 2026
Oscar logo
Oscar
Medium
Software Engineer

Design Telehealth Consultation Queue

Design a web-based queuing application for a health-insurance company that offers free 24/7 telehealth access to its members through a website and mob...

System Design
5
0
71 people solved
Apr 15, 2026
Deshaw logo
Deshaw
Easy
Data Scientist

Variance of an Equal-Weight Portfolio with Uncorrelated and Equicorrelated Assets

A portfolio holds n assets. The return of every asset has variance 1, and the portfolio is equally weighted, with weight 1/n on each asset. Find the v...

Statistics & MathPortfolio Construction & Alpha ResearchProbability
0
0
4 people solved
Aug 6, 2026
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