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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
569
Updated
10.02.2026
11.9k Questions 569 Companies10.02.2026
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
Robinhood logo
Robinhood
Medium
Software EngineerSenior+

Design a Job Scheduler with Explicit Execution Guarantees

Design a job scheduler service. Clients submit jobs to run either now or at a later time. The scheduler must run each due job on a pool of workers, re...

System DesignJob Scheduling & Workflows
1
0
29 people solved
Sep 4, 2026
Anthropic logo
Anthropic
Medium
Software Engineer Locked

In-Memory Key-Value Database with Nested Transactions

This question evaluates a candidate's ability to design a data structure that layers transactional state over a committed base, testing skills in nest...

Coding & Algorithms
24
0
156 people solved
Jun 23, 2026
Rippling logo
Rippling
Medium
Software Engineer Locked

Design a News Aggregation System (Google News-style)

This question assesses a candidate's ability to design a large-scale news aggregation system, covering distributed crawling, article deduplication, ev...

System DesignSearch & Feed SystemsDistributed Coordination
303
3
3366 people solved
Jun 30, 2026
Siemens logo
Siemens
Medium
Machine Learning EngineerSenior+

Batch and Pad Variable-Length Vectors with Optional Final-Batch Dropping

Implement a deterministic data pipeline that groups variable-length integer vectors into batches, pads each retained batch, and optionally drops the f...

Coding & AlgorithmsArrays & Strings
2
0
23 people solved
Sep 4, 2026
Voleon logo
Voleon
Medium
Quantitative Researcher

Bound R-Squared for Individual and Combined OLS Regressions

What range can R-squared take in ordinary least squares, and why? On the same response and observations, suppose the regressions y ~ x1 and y ~ x2 hav...

Statistics & MathRegression & Statistical Modeling
4
0
53 people solved
Jun 27, 2026
Decagon logo
Decagon
Hard
Software Engineer Locked

Count Legal Tic-Tac-Toe Games from the Empty Board

Count every legal Tic-Tac-Toe game sequence from an empty board, treating different move orders as distinct and stopping immediately at the first win ...

Coding & AlgorithmsBacktracking & Recursion
46
0
354 people solved
Jul 17, 2026
eBay logo
eBay
Easy
Applied Scientist

Named entity recognition: framing, algorithm choice, data processing, and metrics

Named entity recognition (NER) comes up in an ML design discussion. For concreteness, assume the text is short e-commerce text, such as product listin...

Machine LearningNatural Language ProcessingModel Evaluation
2
0
10 people solved
Sep 24, 2026
ByteDance logo
ByteDance
Hard
Machine Learning Engineer

Combined Median of Two Sorted Integer Lists in Logarithmic Time

You are given two integer arrays, nums1 and nums2, each sorted in non-decreasing order. Return the median of all the values of both arrays taken toget...

Coding & AlgorithmsBinary Search
0
0
16 people solved
Sep 20, 2026
Squarepoint logo
Squarepoint
Medium
Quantitative Researcher Locked

Count Files Safely from Bash

Count regular files from Bash without breaking on hidden files, spaces, or newlines. Learn safe find usage, recursion and symlink semantics, and why p...

Software Engineering Fundamentals
3
0
37 people solved
Aug 29, 2026
Two Sigma logo
Two Sigma
Medium
Software Engineer Locked

Match Limit Orders with Price-Time Priority

Implement a limit-order matcher that honors crossing rules, price-time priority, partial fills, and resting-order prices. Produce trades and final boo...

Coding & AlgorithmsTrading SystemsData Structure Design
38
0
262 people solved
Jul 31, 2026
Microsoft logo
Microsoft
Medium
Software EngineerSenior+

Adapt When Project Requirements Change Midway

Describe a project whose requirements changed midway through implementation. Explain exactly what changed, how you learned about it, what you did in t...

Behavioral & LeadershipAmbiguity & Decision MakingOwnership & Execution
2
0
15 people solved
Sep 10, 2026
Waymo logo
Waymo
Medium
Software Engineer

Deduplicate a 256 GB File on a Machine With 128 MB of Memory

You have one file of 256 GB containing a large number of records, some of which are duplicates. The machine you run on has only 128 MB of memory. How ...

Software Engineering Fundamentals
2
0
18 people solved
Sep 10, 2026
Databricks logo
Databricks
Medium
Machine Learning Engineer

Retrieve and Rerank Tables and Notebooks for a Data-Aware Coding Agent

An internal coding agent helps employees write code and answer questions. When someone asks a data question, such as how a metric changed over some pe...

ML System DesignRetrieval-Augmented GenerationSearch Relevance
1
0
18 people solved
Sep 11, 2026
Amazon logo
Amazon
Medium
Software Engineer

Learn What You Need to Solve an Unfamiliar Problem

Describe a challenging problem you initially did not know how to solve and how you learned what was needed. Constraints & Assumptions Use a real examp...

Behavioral & Leadership
1
0
18 people solved
Sep 14, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a Dependency-Aware Concurrent Tool Scheduler

Design a dependency-aware concurrent tool scheduler with validated per-agent DAGs, a global execution limit, fair ready queues, atomic state transitio...

Software Engineering FundamentalsJob Scheduling & WorkflowsConcurrency
23
0
240 people solved
Aug 16, 2026
Google logo
Google
Medium
Software EngineerSenior+ Locked

Design a Large-Scale Polite Web Crawler

Design a polite distributed web crawler for roughly ten billion pages and periodic recrawls. Cover a host-aware frontier, robots enforcement, deduplic...

System DesignSystem Design FundamentalsJob Scheduling & Workflows
16
0
290 people solved
Aug 6, 2026
Stripe logo
Stripe
Medium
Software EngineerIntern

Match Payments to Invoices by ID, Exact Amount, then a Forgiveness Range

You are writing the reconciliation step of a billing system. The system holds a list of invoices, receives a list of payments, and must decide which i...

Software Engineering Fundamentals
19
0
262 people solved
Dec 19, 2025
Salesforce logo
Salesforce
Medium
Software EngineerSenior+

Design a Coffee-Shop Order-Management System

Design an order-management system for a coffee shop. Explain how an order is placed, priced, accepted, prepared, and marked ready, and how the design ...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
2
0
21 people solved
Sep 2, 2026
New Relic logo
New Relic
Medium
Backend Engineer

Compress a String by Run-Length Counts, Keeping the Original When Not Shorter

Implement basic string compression based on runs of repeated characters. Replace every maximal run of consecutive identical characters with that chara...

Coding & AlgorithmsArrays & Strings
0
0
6 people solved
Sep 23, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+ Locked

Design Faceted Product Search at Large Scale

Design large-scale product search with free-text relevance, price and taxonomy filters, facet counts, and deterministic pagination. Explain index stru...

System Design
8
0
140 people solved
Aug 22, 2026
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