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

Google

Medium

Data Scientist

Implement Sampling and Minimize Loss in Numerical Coding

Scenario Numerical coding challenges on sampling and loss minimization. Question a) Implement functions to sample from truncated normal distributions ...

Implement Bootstrap-like responsive utility classes

Build a Bootstrap-like Utility System and Accessible Responsive Form (No External CSS) Context You are asked to create a minimal, reusable CSS utility...

Software Engineering Fundamentals

Retrieve First Active and Last Inactive Dates per User

Given a table activity that tracks user activities, write a SQL query to retrieve the first active date and last inactive date for each user. Table Sc...

Data Manipulation (SQL/Python)SQL

Machine Learning Engineer

Compute Conv2D parameter counts

Parameter Count for a 2D Convolution Layer You are given a standard 2D convolution layer with: - Input channels: C_in - Output channels: C_out - Kerne...

Machine LearningComputer Vision

Software Engineer Locked

Implement a custom list with iterator and map

This question evaluates proficiency in data structures and generic collection implementation, specifically list operations, iterator semantics, and hi...

Coding & AlgorithmsData Structure DesignProgramming Languages

Generate Weighted Random NFTs with Updates

You manage k NFT types, each with a positive integer rarity weight w[i]. Implement a minter: constructor(w) builds any needed structures in O(k); mint...

Coding & AlgorithmsMath & Number TheoryTrees

Machine Learning Engineer

Collect labels without existing data

Modeling Without Labels: End-to-End Plan You are tasked with shipping an ML model but have no labeled data. Outline a rigorous approach to: 1) Define ...

Analytics & ExperimentationAnnotation & Label QualityML Data Pipelines & Feature Stores

138 people solved

Sep 6, 2025

Optimize a Fifteen-Sum Card Strategy

This question evaluates algorithmic problem-solving, debugging, simulation-based testing, and strategy optimization using techniques such as search, m...

Clarify ambiguous requirements under pressure

Behavioral & Leadership Prompt — Problem Understanding and Clarification (Data Scientist, Technical Screen) Part 1 — Past Experience Describe a time y...

Behavioral & LeadershipCommunication & StakeholdersAmbiguity & Decision Making

Compute task order with prerequisites

Given an integer n representing tasks labeled 0..n-1 and a list of prerequisite pairs (a, b) meaning b must be completed before a, return any valid or...

Coding & AlgorithmsGraphs

Diagnose a Sudden Revenue Decline: Analyses, Metrics, and Root-Cause Tests

Diagnose a Sudden Revenue Decline: Analyses, Metrics, and Root-Cause Tests Scenario A key revenue metric on Coinbase's dashboard suddenly declines—for...

Analytics & Experimentation

Defend a Data Pipeline Architecture and Its Trade-offs

Prompt Choose one production data pipeline that you personally designed or substantially changed. Walk through its architecture, the requirements that...

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...

Software EngineerIntern

Compare JavaScript == and === operators

In JavaScript, what is the difference between the == and === operators? Explain: 1. How each operator compares two values. 2. What type coercion is an...

Software Engineering Fundamentals

Machine Learning Engineer

Implement automatic braking logic in Python

Using Python, implement a simple automatic braking function. Given current speed v (m/s), distance to obstacle d (m), maximum deceleration a_max (m/s^...

Enterprise Process Management Tool Design

Enterprise Business-Process Management Tool Design You are a Product Manager designing an end-to-end Business Process Management platform for large en...

Product / Decision Making

Calculate Annual Profit of Credit Card Portfolio

Credit Card Portfolio Annual Profit You manage a portfolio of 500,000 active credit-card accounts. Each active card generates multiple revenue streams...

Statistics & MathBusiness Case Analysis

Explain C++ memory, types, and concurrency fundamentals

Explain C++ memory, types, and concurrency fundamentals Answer the following C++ / systems fundamentals questions: 1) C++ class vs struct - What are t...

Software Engineering Fundamentals

Compute grid shortest path with obstacles

You are given an m x n grid of integers where cells with value -1 represent obstacles and all other cells are traversable. Starting at (0, 0) and targ...

Find expected tosses to see a coin pattern

A fair coin is tossed repeatedly until a target length-3 pattern appears as a consecutive substring (e.g., HHH, HTH, HTT, etc.). 1) Describe a general...

Software Engineering Fundamentals

41 people solved

Jan 5, 2026

Tech Interview Questions

Implement Sampling and Minimize Loss in Numerical Coding

Implement Bootstrap-like responsive utility classes

Retrieve First Active and Last Inactive Dates per User

Compute Conv2D parameter counts

Implement a custom list with iterator and map

Generate Weighted Random NFTs with Updates

Collect labels without existing data

Optimize a Fifteen-Sum Card Strategy

Clarify ambiguous requirements under pressure

Compute task order with prerequisites

Diagnose a Sudden Revenue Decline: Analyses, Metrics, and Root-Cause Tests

Defend a Data Pipeline Architecture and Its Trade-offs

Return a Binary Tree in Level Order

Compare JavaScript == and === operators

Implement automatic braking logic in Python

Enterprise Process Management Tool Design

Calculate Annual Profit of Credit Card Portfolio

Explain C++ memory, types, and concurrency fundamentals

Compute grid shortest path with obstacles

Find expected tosses to see a coin pattern

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ML System Design

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