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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
Google logo
Google
Medium
Software Engineer

Validate course catalog dependencies

Design a function to validate an e-learning course catalog. You are given: ( 1) a set of course IDs, and ( 2) a list of prerequisite pairs (u, v) mean...

Coding & AlgorithmsGraphs
8
0
128 people solved
Aug 1, 2025
Snowflake logo
Snowflake
Hard
Software Engineer

Compute height of tree with deleted nodes; minimize deletions

You are given a rooted tree (not necessarily binary). Each node has a list of children. Some nodes are marked as deleted = true. Define the effective ...

Coding & AlgorithmsTreesDynamic Programming
13
0
222 people solved
Jan 16, 2026
Lyft logo
Lyft
Easy
Data Scientist

Determine Probability of Single Ride on Following Day

Determine Probability of a Single Ride on the Following Day A pricing experiment gives each new rider two ride opportunities on day 1. For each offere...

Statistics & MathProbability
44
0
183 people solved
Jul 12, 2025
Shopify logo
Shopify
Medium
Product Manager

Validate Possibly Biased Cancellation-Reason Data and Present It to Leadership

You are a product manager at an e-commerce platform, and the current cancellation rate is x%. Customers who cancel choose a reason from a list, and th...

Analytics & ExperimentationExperiment Design (A/B Testing)Communication & Stakeholders
1
0
14 people solved
Apr 21, 2026
Spotify logo
Spotify
Medium
Product Manager

Leading Spotify's Market Launch in South Africa from Scratch

Spotify entered South Africa in 2018. Suppose it had not, and you are the product manager asked to lead Spotify's launch in that country. How would yo...

Product Design & StrategyRequirements & Launch ExecutionGrowth & Monetization
1
0
18 people solved
Oct 1, 2024
Reddit logo
Reddit
Hard
Data Scientist

Justify synthetic control and handle inference

Synthetic Control: Assumptions, Estimation, Inference, and Diagnostics Context You are estimating the causal effect of an intervention on a single tre...

Statistics & MathCausal InferenceHypothesis Testing
14
0
205 people solved
Oct 13, 2025
PayPal logo
PayPal
Medium
Data Scientist

Optimize thresholds under fraud costs

Cost-sensitive Thresholding for Fraud (ATO) Classifier Context You are evaluating a binary classifier for account takeover (ATO) fraud on a large vali...

Statistics & Math
12
0
91 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist

Perform and justify t-tests

A/B Test: Compare Mean Watch Time Between Variants A and B Context: You ran an A/B test measuring per-user daily watch_time (in seconds). You obtained...

Statistics & Math
6
0
67 people solved
Oct 13, 2025
Google logo
Google
Hard
Data Scientist

Find companies similar to a given client

System Design: Retrieve Top-20 Most Similar Companies for Sales Prospecting You are given an anchor client (e.g., The Coca‑Cola Company). Design a sys...

Machine LearningRetrieval & Candidate GenerationEmbeddings & Vector Search
16
0
128 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Easy
Product Analyst Locked

Investigate LA successful orders drop

This question evaluates product and data analytics competencies including metric decomposition, causal inference, funnel analysis, and experimentation...

Analytics & ExperimentationMetric DiagnosticsExperiment Design (A/B Testing)
16
0
138 people solved
Feb 19, 2026
DoorDash logo
DoorDash
Medium
Machine Learning Engineer Locked

Minimize batches and allocate riders by time

This question set evaluates algorithmic problem-solving in scheduling and resource allocation, assessing understanding of batching under capacity and ...

Coding & AlgorithmsIntervals & SchedulingGreedy
21
0
300 people solved
Feb 3, 2026
Google logo
Google
Medium
Software EngineerNew Grad

Track Island Counts as Land Is Added

Track Island Counts as Land Is Added Problem Implement trackIslandCounts(grid, additions) -> counts. grid is a rectangular array containing 0 for wate...

Coding & Algorithms
8
0
67 people solved
Dec 8, 2025
Meta logo
Meta
Medium
Software Engineer

Reverse between equal-value nodes in list

Given the head of a singly linked list and a target value v, locate the first two nodes whose values equal v (call them A and B, with A before B) and ...

Coding & Algorithms
7
0
67 people solved
Sep 6, 2025
PayPal logo
PayPal
Medium
Data Scientist

Explain Window Functions and Joins in SQL and Python

TABLE transactions | transaction_id | user_id | merchant | amount | currency | transaction_ts | | 1001 | 17 | Walmart | 45.80...

Data Manipulation (SQL/Python)
3
0
34 people solved
Aug 4, 2025
Medium
Software Engineer

Distinguish Checked and Unchecked Exceptions in Java

What is the difference between checked and unchecked exceptions in Java? Give examples and explain what the distinction requires at a method boundary....

Software Engineering FundamentalsProgramming Languages
0
0
5 people solved
Jan 14, 2026
SoFi logo
SoFi
Easy
Software Engineer

Solve Time-Window and Binary Swap Problems

This online assessment contained two coding problems: 1. Maximum requests in a time window You are given a non-decreasing integer array requestTimes, ...

Coding & AlgorithmsArrays & StringsSimulation & State Machines
10
0
109 people solved
Jan 20, 2026
ByteDance logo
ByteDance
Medium
Software EngineerNew Grad

Evaluate a Migration from MySQL to MongoDB

A team proposes migrating an existing MySQL-backed service to MongoDB. Explain how you would decide whether the migration is justified, compare the da...

System Design
4
0
38 people solved
Aug 13, 2026
Apple logo
Apple
Hard
Data Engineer

Discuss Challenges and Career Goals

Answer the following behavioral interview questions: 1. What was the most difficult problem you have faced in your work, and how did you approach it? ...

Behavioral & LeadershipMotivation & FitProject Deep Dive
27
0
240 people solved
Apr 2, 2026
Google logo
Google
Medium
Product Manager

Apple Maps Share Growth Strategy and Go-to-Market Plan at Feature Parity

You are a product manager on Apple Maps. The interviewer asks two connected questions. Clarifying Questions - Is market share measured among iPhone ow...

Product Design & StrategyProduct StrategyMarket & Competitive Analysis
0
0
6 people solved
Jun 25, 2026
IBM logo
IBM
Easy
Data ScientistIntern

Describe building statistical vs ML models

You’re interviewing for a Data Scientist internship on a marketing analytics team. Tell a story about a project where you built (a) a statistical mode...

Behavioral & LeadershipProject Deep DiveFeature Engineering
18
0
138 people solved
Nov 9, 2025
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