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

Databricks

Medium

Software Engineer Locked

Design a dependency-aware job scheduler

This question evaluates understanding of designing scalable, dependency-aware job schedulers and related competencies in distributed systems, includin...

System DesignJob Scheduling & WorkflowsFault Tolerance & Failover

Evaluate word-guess feedback with repeats

You are implementing feedback for a Wordle-like guessing game. Part 1 — Produce feedback for one guess You are given two strings of equal length guess...

Coding & AlgorithmsArrays & StringsSimulation & State Machines

Count Five-Position Palindromes in a Digit String

Problem Count subsequences of digit string s with exactly five characters that form a palindrome. Different increasing choices of indices count separa...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings

13 people solved

xAI

Hard

Software Engineer Locked

Find kth element and sliding-window kth in stream

This question evaluates understanding of order statistics and selection in arrays as well as sliding-window stream processing, including maintaining k...

Coding & AlgorithmsSortingData Structure Design

Design a single- and multi-threaded web crawler

Web Crawler (single-threaded, then multi-threaded) You are given: - A starting URL startUrl (e.g., "http://news.example.com/a/index.html"). - An inter...

Coding & AlgorithmsGraphsConcurrency

Software Engineer Locked

Design a KV store with QPS API

This question evaluates a candidate's ability to design scalable, highly available key-value storage systems and to integrate real-time metrics report...

System DesignKey-Value Stores

731 people solved

Feb 4, 2026

Goldman SachsMicrosoftJPMorgan Chase

Medium

Software Engineer

First Champion to Win k Consecutive Array Comparisons

Problem The array has distinct values. Each round compares its first two entries; the larger stays first and the smaller moves to the end. Stop when o...

Coding & AlgorithmsSimulation & State MachinesArrays & Strings

Find minimum subarray length with k distinct integers

Given an integer array arr and an integer k, find the minimum length of a contiguous subarray that contains exactly k distinct integer values. Return ...

Coding & AlgorithmsTwo Pointers & Sliding Window

Machine Learning Engineer Locked

Explain LLM post-training methods and tradeoffs

This question evaluates a practitioner's knowledge of LLM post-training methods—including supervised fine-tuning, preference optimization approaches (...

Machine LearningFine-Tuning & Alignment TechniquesAI Safety & Alignment

Data ScientistIntern Locked

Adapting a Research Approach Midstream

Adapt when a research lead asks for a change to an approach that is already underway.

Behavioral & Leadership

Design Calendar Event Conflict Handling

Design the event settings and conflict-handling system for a large-scale calendar product similar to Google Calendar. Users can create, update, and de...

System DesignSystem Design FundamentalsIntervals & Scheduling

Software Engineer Locked

Describe a Deep Debugging Investigation

Describe a deep debugging investigation through competing hypotheses, decisive evidence, causal reproduction, and a regression test for the real failu...

Behavioral & LeadershipDebuggingTesting & Quality

Hiring Manager Behavioral Round: Project Impact, Influence, Communication, and Setbacks

Question This is the hiring-manager round for a data engineering role: a roughly 30-45 minute conversation, not a peer coding interview. The interview...

Behavioral & Leadership

Software Engineer Locked

Find Conflicting Events

This question evaluates algorithmic problem-solving in coding and algorithms, focusing on grouping, sorting, and sliding-window techniques applied to ...

Estimate Page-Visit Duration from the Next User Event

Estimate page-visit duration with each user’s next event, deterministic timestamp ties, and null durations for final events.

Data Manipulation (SQL/Python)SQL

Planning a Low-Disruption Over-the-Air Release for Tesla's Vehicle Fleet

Tesla cars depend on over-the-air software updates for new features and fixes. You are the product manager responsible for a major update. How would y...

Product Design & StrategyRequirements & Launch ExecutionCI/CD & Deployment

Software Engineer Locked

Interleave Three Equal-Length Strings

Interleave three equal-length strings by taking the character at each index from the first, second, and third string in order. Preserve arbitrary Unic...

Coding & Algorithms

56 people solved

Jul 5, 2026

AmazonBloombergGoogle

Easy

Software Engineer

Count Visits with No Transactions for Each Customer

Problem Find each customer with at least one Visits row having no matching transaction, and report customer_id and count_no_trans, the number of such ...

Data Manipulation (SQL/Python)SQL

7 people solved

Onepay

Easy

Software Engineer Locked

Count Complete Highway Journeys from Toll Logs

Count completed highway journeys from unsorted entry, main-road, and exit toll records grouped by vehicle and direction. Handle replacement entries, m...

Invent a New Product That Builds on Strava's Athlete Community and Activity Data

Propose a new product built around Strava, the app where runners, cyclists and other athletes record their activities and follow each other's training...

Product Design & StrategyProduct SenseGrowth & Monetization

14 people solved

Aug 9, 2026

Visa Tools

Visa Sponsors

H-1B Odds Calculator

Visa Bulletin

Tech Interview Questions

Design a dependency-aware job scheduler

Evaluate word-guess feedback with repeats

Count Five-Position Palindromes in a Digit String

Find kth element and sliding-window kth in stream

Design a single- and multi-threaded web crawler

Design a KV store with QPS API

First Champion to Win k Consecutive Array Comparisons

Find minimum subarray length with k distinct integers

Explain LLM post-training methods and tradeoffs

Adapting a Research Approach Midstream

Design Calendar Event Conflict Handling

Describe a Deep Debugging Investigation

Hiring Manager Behavioral Round: Project Impact, Influence, Communication, and Setbacks

Find Conflicting Events

Estimate Page-Visit Duration from the Next User Event

Planning a Low-Disruption Over-the-Air Release for Tesla's Vehicle Fleet

Interleave Three Equal-Length Strings

Count Visits with No Transactions for Each Customer

Count Complete Highway Journeys from Toll Logs

Invent a New Product That Builds on Strava's Athlete Community and Activity Data

Choose your next challenge

Blind 75

ML System Design

System Design Interview