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

"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_

"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"

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

"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."

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

"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."

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

_The_TaNk_

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

"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."

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

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

Medium

Software Engineer

Solve grid compromise spread with BFS

You are given an m×n grid representing a data center: 0 = empty rack, 1 = secure server, 2 = compromised server. Each minute, any secure server that i...

Coding & AlgorithmsGrids & MatricesGraphs

Choose Between Precision and Recall for a Classification Decision

A binary classifier will support a real decision, and the model produces a probability score for each observation. Explain precision and recall, how t...

Software Engineer Locked

Explain your database experience and debugging approach

This question evaluates a candidate's practical database engineering knowledge, concurrency debugging skills, and ability to integrate and verify AI-a...

Software Engineering FundamentalsConcurrencyAI-Assisted Development

Handle highly imbalanced classification data

You must build a binary classifier for fraud with a 0.2% positive rate and 10M rows × 500 features. Propose an end-to-end plan that covers: 1) data sp...

Machine LearningSupervised LearningModel Evaluation

Design ML ranking for query suggestions

Re-rank Query Suggestions for Autocomplete Context You are building a re-ranking system for search autocomplete. For each keystroke, a candidate gener...

Implement top-K over a stream

Given a high-volume stream of events (e.g., account IDs from new account openings), design and implement a data structure that supports: ( 1) insertin...

Coding & AlgorithmsHeaps & Priority QueuesBatch & Stream Processing

Analyze shopping funnel with joins and windows

Write SQL (PostgreSQL) to analyze a 4-step shopping funnel: view_product → add_to_cart → checkout_start → purchase. Use the schema and sample data bel...

Data Manipulation (SQL/Python)SQLUser Behavior & Funnels

Design multi-core service startup scheduler

Service Startup Scheduler on a Host with M CPU Cores Context You are given a directed acyclic graph (DAG) of services where an edge u → v means servic...

System DesignJob Scheduling & WorkflowsGraphs

Generate All Valid Combinations of Balanced Parentheses

Generate All Valid Combinations of Balanced Parentheses Given an integer n representing the number of pairs of parentheses, generate all distinct stri...

Determine Probability of Both Children Being Boys

Conditional Probability: Two Children A family has two children. You learn that at least one of them is a boy. Answer the questions below and state yo...

Analyze Posting Behavior by Cohort and Date

creator_post +------------+---------+------+ | post_date | user_id | post | +------------+---------+------+ | 2023-01-01 | 111 | 1 | | 2023-01...

Data Manipulation (SQL/Python)

23 people solved

Aug 4, 2025

Find buildings with rightward view

Find buildings with rightward view You are given an array of building heights aligned along a street that faces the ocean to the right. Return the ind...

Median, Variance, and Linear Trend of a Daily Temperature Dataset

Median, Variance, and Linear Trend of a Daily Temperature Dataset You are given n daily temperature readings collected in New York City. The data is a...

Frontend Engineer Locked

Simulate a Rank-Based Tournament

This question evaluates ability to simulate tournament pairing and single-elimination progression using array manipulation and data structures while p...

Calculate Break-even for New Credit Card Product Launch

Calculate Break-even for New Credit Card Product Launch Break-Even for a Credit Card with Annual Fee, Interchange, and Cashback Context You are evalua...

Analytics & ExperimentationBusiness Case AnalysisMath & Number Theory

Generate split-stay pairs efficiently

Given N Airbnb listings, each with available days as integers, and an inclusive requested date range [L, R], return all ordered pairs (X, Y) of distin...

Coding & AlgorithmsIntervals & Scheduling

Applied ScientistSenior+

Find shortest transformation steps in a word graph

You are given two strings begin and end of the same length, and a list words of distinct strings (also same length). You can transform one string into...

Coding & AlgorithmsGraphsString Algorithms

Design a scalable video platform database

Design the relational database for a YouTube-like video company. Deliverables: 1) list the core tables with key columns, types, and constraints (users...

Data Manipulation (SQL/Python)Dimensional ModelingSystem Design Fundamentals

121 people solved

Oct 13, 2025

Medium

Machine Learning Engineer Locked

Explain bias–variance, overfitting, and vanishing gradients

This question evaluates understanding of core machine learning fundamentals—specifically the bias–variance tradeoff, overfitting detection and mitigat...

Machine LearningML FundamentalsNeural Networks & Training

Address Overfitting with L1 Regularization in Regression

Linear Regression with Many Predictors and Few Observations You fit an ordinary least squares linear regression with 500 predictors and 600 observatio...

Machine Learning

89 people solved

Jul 12, 2025

Tech Interview Questions

Solve grid compromise spread with BFS

Choose Between Precision and Recall for a Classification Decision

Explain your database experience and debugging approach

Handle highly imbalanced classification data

Design ML ranking for query suggestions

Implement top-K over a stream

Analyze shopping funnel with joins and windows

Design multi-core service startup scheduler

Generate All Valid Combinations of Balanced Parentheses

Determine Probability of Both Children Being Boys

Analyze Posting Behavior by Cohort and Date

Find buildings with rightward view

Median, Variance, and Linear Trend of a Daily Temperature Dataset

Simulate a Rank-Based Tournament

Calculate Break-even for New Credit Card Product Launch

Generate split-stay pairs efficiently

Find shortest transformation steps in a word graph

Design a scalable video platform database

Explain bias–variance, overfitting, and vanishing gradients

Address Overfitting with L1 Regularization in Regression

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