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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
Netflix logo
Netflix
Medium
Software Engineer Locked

Return the longest contiguous subarray with all distinct values

This question evaluates a candidate's understanding of array-processing algorithms, duplicate detection, and maintaining state to identify the longest...

Coding & AlgorithmsTwo Pointers & Sliding Window
17
0
317 people solved
Jan 22, 2026
Pinterest logo
Pinterest
Medium
Data Scientist

Design Data Structure for Sparse Matrices Operations

Scenario Analytics engine stores extremely sparse numeric matrices. Question Design a data structure to store two sparse matrices and implement print(...

Coding & Algorithms
17
0
73 people solved
Jul 12, 2025
Coinbase logo
Coinbase
Hard
Machine Learning Engineer Locked

Implement local maxima, bagging, and k-means

This set of tasks evaluates algorithmic problem-solving and implementation skills across array processing (local maxima), ensemble methods (bagging cl...

Coding & AlgorithmsML CodingSupervised Learning
23
0
159 people solved
Feb 1, 2026
LinkedIn logo
LinkedIn
Medium
Software Engineer

Find the k-th largest element in an array

Given an integer array nums and an integer k, return the k-th largest element in the array. Notes: - The k-th largest element is the element that woul...

Coding & AlgorithmsHeaps & Priority QueuesSorting
15
0
122 people solved
Nov 21, 2025
C3 AI logo
C3 AI
Hard
Data Scientist Locked

Find the Intersection of Two Linked Chains

Find the first shared node of two acyclic linked chains using node identity and constant extra space. Practice the pointer-switching technique for une...

Coding & Algorithms
1
0
19 people solved
Aug 15, 2026
Amazon logo
Amazon
Medium
Data ScientistSenior+

Implement list overlap and dense-ranked word frequencies

Part A — Multiset overlap count Implement count_overlap(a: List[int], b: List[int]) -> int that returns the size of the multiset intersection of a and...

Coding & Algorithms
8
0
75 people solved
Oct 13, 2025
Envoy logo
Envoy
Easy
Software Engineer

Design a shopping cart with coupons and tax

Design an object-oriented shopping cart module for an e-commerce system. Requirements: - A cart can add items and update item quantities. - The cart s...

Software Engineering FundamentalsLow-Level Design (OOP)
13
0
125 people solved
Mar 11, 2026
Boston Consulting Group logo
Boston Consulting Group
Medium
Data Scientist

Manipulate and merge DataFrames correctly

Given three pandas DataFrames: customers customer_id, join_date, tier 101, 2025-01-02, gold 102, 2025-02-10, silver 103, 2025-03-05, gold products mod...

Data Manipulation (SQL/Python)
2
0
40 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist

Optimize invites under capacity constraints

You have n donors (n up to 100,000). For each donor i you know: p_online[i] (probability of donating if emailed), a_online[i] (expected donation condi...

Coding & AlgorithmsBusiness Case AnalysisDynamic Programming
15
0
125 people solved
Oct 13, 2025
EliseAI logo
EliseAI
Medium
Software Engineer

Explain prompt engineering strategies for chatbots

Prompt Engineering for Reliable, Steerable, and Safe Chatbots Context You are designing a production-grade chatbot that must be reliable (consistent, ...

Machine LearningPrompt EngineeringLLM Applications
22
0
165 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Software EngineerNew Grad Locked

Stand by a Disputed Technical Judgment

Prepare an example of defending a disputed technical judgment with evidence while actively testing your own assumptions. Explain respectful dissent, d...

Behavioral & LeadershipLeadership & InfluenceAmbiguity & Decision Making
9
0
116 people solved
Jul 15, 2026
Databricks logo
Databricks
Medium
Machine Learning EngineerSenior+ Locked

Resolve a Design Conflict

This question evaluates conflict resolution, stakeholder management, technical decision-making, and collaborative leadership skills within a Machine L...

Behavioral & Leadership
10
0
71 people solved
Feb 7, 2026
Airbnb logo
Airbnb
Hard
Software Engineer

Design scalable notification system

Question Design a scalable notification system for a marketplace at Airbnb scale. It must deliver messages to millions of users across email, SMS, and...

System DesignReal-Time SystemsMessaging & Event-Driven
34
0
220 people solved
Jul 29, 2025
SIG (Susquehanna) logo
SIG (Susquehanna)
Easy
Data Scientist

Determine knights and knaves roles

Determine knights and knaves roles Knights and Knaves Logic Puzzle Context On an island, each person is either: - Knight: always tells the truth. - Kn...

Statistics & Math
17
0
120 people solved
Aug 4, 2025
Salesforce logo
Salesforce
Medium
Software Engineer Locked

Write SQL for top spender and non-spenders

This question evaluates SQL querying skills including aggregation and grouping, date/time windowing for previous-calendar-month calculations, joins an...

Software Engineering FundamentalsSQL
9
0
81 people solved
Jan 22, 2026
Ramp logo
Ramp
Hard
Software EngineerSenior+ Locked

Present a System You Designed

Present a system you personally designed, moving from the problem and constraints through architecture, ownership, and key trade-offs. A strong explan...

Behavioral & Leadership
5
0
72 people solved
May 25, 2026
Discord logo
Discord
Medium
Data Scientist

Design Product Notification and Autocomplete Experiments

You are interviewing for a Product Data Scientist role at Discord. Answer both product experimentation case studies below. Case 1: Subscription notifi...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
8
0
129 people solved
Jan 16, 2026
Netflix logo
Netflix
Hard
Data Scientist

Design A/B Test for Streaming Feature Network Effects

Design A/B Test for Streaming Feature Network Effects A/B Test Design With Potential Social-Network Spillovers (Streaming Platform) Context You are de...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
16
0
136 people solved
Aug 4, 2025
Google logo
Google
Hard
Software Engineer

Find secret word with match-count feedback

Problem You are given a list of unique lowercase words, all of the same length (e.g., length = 6). One of these words is a secret word. You can intera...

Coding & Algorithms
22
0
228 people solved
Feb 11, 2026
Citadel logo
Citadel
Hard
Data Scientist

Diagnose outliers and influence in linear regression

OLS Diagnostics: Outliers, Leverage, Influence, and Cook's Distance Context You are fitting an ordinary least squares (OLS) linear regression with an ...

Machine LearningRegression & Statistical ModelingModel Evaluation
10
0
172 people solved
Oct 13, 2025
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