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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
Oracle logo
Oracle
Medium
Software Engineer

Design a rate limiter

Design a rate limiting system for an API gateway. Your design should address: - Rate limits such as "N requests per second/minute" per key (e.g., per ...

System DesignRate LimitingAPI Design
14
0
116 people solved
Jan 26, 2026
Capital One logo
Capital One
Medium
Data Scientist

Automate Python Virtual Environment Setup on Linux Terminal

Scenario Shell script that automates Python virtual-environment setup on a Linux terminal during a tech interview Question Walk through the script lin...

Coding & Algorithms
117
0
422 people solved
Jul 12, 2025
Capital One logo
Capital One
Medium
Data Scientist

Assess card rewards profitability and break-even spend

Credit Card Unit Economics and Break-even Spend Context A bank is evaluating launching a credit card that pays 1% rewards on all purchases. Consider p...

Analytics & ExperimentationBusiness Case Analysis
8
0
110 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Write SQL for CTR and Revenue

This question evaluates proficiency in SQL-based data manipulation and analytics, focusing on joins across event and reference tables, time-of-day buc...

Data Manipulation (SQL/Python)SQL
16
1
113 people solved
Mar 12, 2026
Amazon logo
Amazon
Medium
Product Manager

Retuning Amazon's Recommendation Engine to Turn More Browsing into Purchases

Amazon shows product recommendations throughout its shopping experience. As the product manager for recommendations, how would you improve the recomme...

Product Design & StrategyProduct Design & ImprovementRecommendation Systems
0
0
8 people solved
Aug 17, 2026
Adobe logo
Adobe
Medium
Software Engineer

Return a Binary Tree in Level Order

Problem Given a binary tree, return its values in level order as a list of lists. Values at depth 0 appear in the first list, values at depth 1 in the...

Coding & Algorithms
7
0
50 people solved
Apr 19, 2026
Google logo
Google
Medium
Data EngineerIntern

Describe building and improving a dashboard

Describe a past project where you built a dashboard for business or product stakeholders. Explain the business goal, audience, metrics, data-quality w...

Behavioral & Leadership
5
0
94 people solved
Mar 9, 2025
Squarepoint logo
Squarepoint
Medium
Risk Technology Software EngineerSenior+ Locked

Design an Ordered Vector with Move Semantics and Analyze Its Memory Layout

Design a sorted C++ vector with move-only support, allocator-aware insertion, exception guarantees, and clear invalidation rules, then compare record ...

Software Engineering Fundamentals
2
0
25 people solved
Aug 16, 2026
Amazon logo
Amazon
Easy
Applied Scientist

Compare decision trees and random forests

Compare decision trees and random forests. In your answer, discuss: - How a single decision tree is built and its main advantages and disadvantages. -...

Machine Learning
10
0
94 people solved
Dec 8, 2025
Palo Alto Networks logo
Palo Alto Networks
Medium
Software Engineer

Find normalized list difference efficiently

Given two lists of strings, list1 and list2, return all elements that appear in list1 but not in list2 after applying a consistent normalization step ...

Coding & AlgorithmsArrays & Strings
8
0
125 people solved
Sep 6, 2025
WeRide logo
WeRide
Medium
Software Engineer Locked

Implement Several Core Algorithmic Components

This multi-part problem evaluates core competencies in data structures and algorithm design (LRU cache, grid pathfinding and earliest-feasible-time an...

Coding & Algorithms
2
0
32 people solved
May 4, 2026
Capital One logo
Capital One
Medium
Data ScientistIntern

Code review of a scikit-learn-style transformer, its tests and a shell test script

In a code-review and testing round for a data science role, the interviewer shows you data-preparation code written as scikit-learn-style classes with...

Software Engineering FundamentalsML CodingTesting & Quality
0
0
2 people solved
May 11, 2026
ByteDance logo
ByteDance
Medium
Data Engineer Locked

Choose Components for a Data Warehouse

Compare Hive, Spark, Hadoop components, and SQL Server by storage, compute, governance, latency, scale, and operational trade-offs.

Software Engineering Fundamentals
2
0
47 people solved
Aug 28, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Easy
Data Scientist Locked

Compute the Probability Two Bloom Intervals Overlap

Compute the overlap probability for two independently timed flower blooms with different durations. The geometric solution subtracts two nonoverlap tr...

Statistics & Math
4
0
42 people solved
Aug 16, 2026
American logo
American
Medium
Machine Learning Engineer

Design an enterprise RAG agent system

Design an enterprise AI assistant for internal company knowledge. The system should answer employee questions over documents such as policies, product...

ML System Design
6
0
102 people solved
Jan 20, 2026
DoorDash logo
DoorDash
Hard
Analytics Engineer

Walk Through an ETL Project

For an Analytics Engineer interview, walk through an ETL project you built end to end. Describe the business goal, source systems, ingestion pattern, ...

Behavioral & Leadership
12
0
127 people solved
Oct 12, 2025
Dropbox logo
Dropbox
Medium
Software Engineer

Implement feedback for word guessing game

You are implementing the core logic for a simple word-guessing game. There is: - A dictionary of valid words: a list of distinct lowercase strings, al...

Coding & AlgorithmsArrays & Strings
10
0
190 people solved
Nov 1, 2025
Meta logo
Meta
Hard
Software EngineerNew Grad

Compute the Dot Product of Sparse Vectors

Problem Each sparse vector is represented as a list of [index, value] pairs sorted by strictly increasing index; omitted positions have value zero. Re...

Coding & Algorithms
3
0
60 people solved
Dec 21, 2025
Airbnb logo
Airbnb
Medium
Software Engineer Locked

Design a Distributed Key-Value Store

This question evaluates expertise in distributed systems and large-scale storage design, covering API design, partitioning, replication, request routi...

System DesignKey-Value StoresConsistency & Availability
15
0
260 people solved
Jan 9, 2026
Boston Consulting Group logo
Boston Consulting Group
Medium
Product Manager

Walk through a lead-to-cash project you delivered and prove its business impact

Walk the interviewer through a lead-to-cash project in which you delivered a solution meant to produce specific business results. How did you decide w...

Behavioral & LeadershipProject Deep DiveLaunch Evaluation
0
0
7 people solved
Jul 30, 2026
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