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

"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

GoogleMetaMicrosoft

Medium

Software Engineer

Count Substrings That Include a,b and c

Problem The string s uses only a,b,c. Return the number of contiguous substring occurrences containing at least one of each of these three letters. Eq...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

11 people solved

Apple

Medium

Machine Learning Engineer Locked

Find Minimum Processing Rate

This question evaluates algorithmic problem-solving skills, discrete mathematics involving integer division and ceiling operations, and complexity ana...

Software EngineerSenior+ Locked

Binary Tree Path Sum

Determine whether a level-order binary tree contains a root-to-leaf path whose node values sum to a target.

Longest Contiguous Stretch of Distinct Characters in a String

Given a string s, return the length of the longest substring of s in which every character differs from every other character. A substring is a contig...

Coding & AlgorithmsTwo Pointers & Sliding Window

Manage Pending Tasks with Global IDs and Due-Date Ordering

Problem Implement TodoList, initially with no tasks. - addTask(userId, taskDescription, dueDate, tags) adds a pending task and returns a global task I...

Coding & AlgorithmsData Structure DesignSorting

9 people solved

DoorDash

Medium

Software Engineer Locked

Handle Upstream Failures in a Payment-Calculation Service

Handle payment-calculation dependency failures with pending states, versioned inputs, bounded retries, idempotent effects, late-event adjustments, and...

Software Engineering FundamentalsFault Tolerance & FailoverDistributed Transactions & Idempotency

Fewest People Covering Every Required Skill

Problem Choose a smallest-size set of people whose combined skills cover every string in req_skills. Return their original zero-based indices in any o...

Coding & AlgorithmsDynamic ProgrammingBit Manipulation

12 people solved

Hard

Machine Learning Engineer

Insert parentheses to minimize expression value

You are given a string expression of the form A+B, where A and B are non-empty strings of digits (no digit is '0'). You must insert exactly one pair o...

Coding & AlgorithmsArrays & StringsMath & Number Theory

Explain a Project Whose Schedule Became Unusually Tight

Explain a project whose schedule became unusually tight, including the earliest warning and the decision you personally owned. Show how you changed sc...

Behavioral & Leadership

58 people solved

Aug 14, 2026

GoogleMicrosoftBloombergZoho

Easy

Software Engineer

Check Whether the Maximum Dominates Every Other Value

Problem The array has a unique largest value. Return its index if it is at least twice every other entry; otherwise return -1. `cpp class Solution { p...

Coding & AlgorithmsArrays & Strings

Find shortest path in a Fibonacci-ordered tree

You are given a recursively-defined binary tree T(order) whose shape depends only on order (not on node values). Nodes are labeled 0..N-1 using preord...

Coding & AlgorithmsTrees

350 people solved

Nov 6, 2025

Solve SQL and Python coding tasks

You are given a small library system with the following relational schema and several Python data-processing tasks. Answer the SQL questions and imple...

Coding & AlgorithmsSQLDynamic Programming

Return Every Row in a Long High-Attendance ID Run

Problem Report Stadium records belonging to a run of at least three consecutive ids, with people >= 100 on every row in the run. Consecutive ids matte...

Data Manipulation (SQL/Python)SQL

7 people solved

Waymo

Easy

Data Scientist Locked

Use Bayes to interpret a broken radar alarm

This question evaluates Bayesian probabilistic reasoning, understanding of base rates, sensitivity/specificity, decision-theoretic trade-offs between ...

Analytics & ExperimentationProbabilityHypothesis Testing

Behavioral: Clearing a Serious Project Blocker and Getting the Team Moving Again

Tell me about a time a project you worked on ran into a major obstacle. What did you do to get the team moving again? `hint Make your role visible Cho...

Behavioral & LeadershipOwnership & ExecutionLeadership & Influence

Implement four DS coding tasks

You are completing a CodeSignal-style assessment (Python or R). Implement solutions for the following four independent questions. 1) Two-sample z-test...

Coding & AlgorithmsCausal InferenceHypothesis Testing

Software EngineerIntern

Minutes Until Rot Spreads to Every Fresh Cell in a Grid

A rectangular grid shows the cells of a crate of fruit. Each cell is empty, holds a fresh piece of fruit, or holds a rotten piece. Rot spreads once pe...

Coding & AlgorithmsGrids & Matrices

Implement an Extensible Chatbot App

Implement a ChatApp class that processes user messages and routes them to bot responders. The system must support multiple bot types, and the design m...

Software Engineering FundamentalsLow-Level Design (OOP)

Design fulfillment truck routing and inventory system

Scenario You are designing the software platform for a large e-commerce fulfillment network that plans truck routes and manages container/inventory mo...

System DesignSystem Design FundamentalsGeo & Delivery Systems

Design a Payment System

Design a Payment System Design the backend payment system for an online platform that charges customers for goods and services (for example, a marketp...

System Design

123 people solved

Mar 16, 2026

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Tech Interview Questions

Count Substrings That Include a,b and c

Find Minimum Processing Rate

Binary Tree Path Sum

Longest Contiguous Stretch of Distinct Characters in a String

Manage Pending Tasks with Global IDs and Due-Date Ordering

Handle Upstream Failures in a Payment-Calculation Service

Fewest People Covering Every Required Skill

Insert parentheses to minimize expression value

Explain a Project Whose Schedule Became Unusually Tight

Check Whether the Maximum Dominates Every Other Value

Find shortest path in a Fibonacci-ordered tree

Solve SQL and Python coding tasks

Return Every Row in a Long High-Attendance ID Run

Use Bayes to interpret a broken radar alarm

Behavioral: Clearing a Serious Project Blocker and Getting the Team Moving Again

Implement four DS coding tasks

Minutes Until Rot Spreads to Every Fresh Cell in a Grid

Implement an Extensible Chatbot App

Design fulfillment truck routing and inventory system

Design a Payment System

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