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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
IBM logo
IBM
Easy
Data Scientist

Find minimum operations to make array sorted

Problem You are given an integer array a of length n. Define one operation as follows: 1. Remove the first element x = a[0]. 2. Append x to the end of...

Coding & AlgorithmsSimulation & State Machines
12
1
173 people solved
Oct 3, 2025
Decagon logo
Decagon
Easy
Software Engineer Locked

Design rolling-window conversation score tracker

This question evaluates a candidate's ability to design efficient data structures and algorithms for time-windowed streaming data, including maintaini...

Coding & AlgorithmsData Structure Design
25
0
298 people solved
Mar 1, 2026
Robinhood logo
Robinhood
Medium
Backend Engineer

Critique a Recent Engineering Project and Explain What You Would Redo

Critique a Recent Engineering Project and Explain What You Would Redo Choose a meaningful engineering project from roughly the last two years. Give a ...

Behavioral & Leadership
10
0
87 people solved
Jul 17, 2026
Robinhood logo
Robinhood
Easy
Software Engineer

Compute trigger counts in a DAG

You are given a directed acyclic graph (DAG) that represents trigger dependencies between tasks. - Each node represents a task. - There is exactly one...

Coding & AlgorithmsGraphsDynamic Programming
12
0
165 people solved
Dec 8, 2025
Deshaw logo
Deshaw
Hard
Software Engineer

Compare Fixed and Variable Train Gaps Without a Timetable

Compare Fixed and Variable Train Gaps Without a Timetable Compare two train services for a commuter who arrives without consulting a timetable. Servic...

Statistics & Math
3
0
40 people solved
Apr 20, 2026
Rippling logo
Rippling
Easy
Software EngineerIntern

Clarify and Find Common Ancestors in a Graph

Explain how you would find common ancestors in a graph. Begin by clarifying the edge direction, graph structure, queried vertices, and whether the res...

Software Engineering FundamentalsGraphs
5
0
57 people solved
Dec 12, 2025
Uber logo
Uber
Medium
Software Engineer Locked

Design a Food Delivery Cart

This question evaluates competency in designing stateful, user-facing subsystems including data modeling, API design, session persistence, caching, co...

System DesignSystem Design Fundamentals
201
1
1521 people solved
Apr 21, 2026
Ramp logo
Ramp
Hard
Software Engineer Locked

Traverse an HTTP Maze with Retry Handling

Traverse a simulated HTTP maze with breadth-first search to return the shortest route from a start URL to an exit. Handle links, malformed input, succ...

Coding & Algorithms
4
0
75 people solved
May 25, 2026
Databricks logo
Databricks
Medium
Software Engineer

Design an online bookstore: DB insert succeeds but SQS publish fails, and duplicate messages

Design the backend of an online bookstore where customers browse books and place orders. When an order request arrives, the service inserts the order ...

System DesignDistributed Transactions & IdempotencyMessaging & Event-Driven
0
0
3 people solved
Aug 9, 2026
Ramp logo
Ramp
Medium
Software Engineer

Implement multi-level task manager APIs

You are implementing an in-memory task management system with a set of APIs that evolve over 4 levels. All APIs receive a timestamp: int parameter. Un...

Coding & AlgorithmsLow-Level Design (OOP)Intervals & Scheduling
32
0
289 people solved
Jan 22, 2026
Riotgames logo
Riotgames
Easy
Software Engineer Locked

Explain JavaScript Numeric Edge Cases

Explain JavaScript numeric classification and parsing behavior, including integer checks, NaN, and Infinity edge cases.

Software Engineering Fundamentals
1
0
15 people solved
Aug 26, 2026
Roblox logo
Roblox
Easy
Software Engineer Locked

Design Multi-Dimensional Request Rate Limiting

This question evaluates proficiency in designing distributed rate limiting systems, including API and data model design, consistency and scalability t...

System DesignRate Limiting
211
0
2566 people solved
May 4, 2026
Apple logo
Apple
Hard
Machine Learning Engineer

Explain annotation agreement and LLM vs human judges

Annotation Agreement and LLM-vs-Human Judges Context You are on a model-evaluation team. Datasets are labeled, and model outputs are scored, by humans...

Machine LearningAnnotation & Label QualityLLM Evaluation
14
0
220 people solved
Aug 13, 2025
Optiver logo
Optiver
Medium
Software Engineer

Solve numeric sequence pattern puzzles

Sequence Pattern Puzzles This is a timed pattern-recognition section of the kind used on quantitative-trading aptitude tests. You are given five indep...

Statistics & MathPuzzles & Brainteasers
100
0
676 people solved
Aug 13, 2025
Airbnb logo
Airbnb
Hard
Software EngineerSenior+

How do you conduct a code review exercise?

In a live interview, you are shown a short code change — a diff, a pull request, or a standalone function — and asked to produce written code review c...

Software Engineering FundamentalsCode Quality & Maintainability
28
0
499 people solved
Jan 19, 2026
Capital One logo
Capital One
Medium
Data Scientist

Analyze Subscription, Insurance, App, and Card Cases

You are in a Data Scientist "power day" interview for a product analytics role. The interviewer gives you four independent business cases. For each on...

Analytics & ExperimentationBusiness Case Analysis
39
0
697 people solved
Apr 12, 2026
Sentry.Io logo
Sentry.Io
Medium
Software Engineer Locked

Design a Book Purchase Broker

Design a system for brokering book purchase requests across partner bookstores with target price constraints and expiration windows. The question eval...

System Design
1
0
21 people solved
Jun 12, 2026
Amazon logo
Amazon
Medium
Software EngineerNew Grad

Implement and Analyze an LRU Query Cache

Problem Implement a fixed-capacity least-recently-used cache for database query results. A successful get and every put make the key most recently use...

Coding & Algorithms
1
0
33 people solved
Mar 12, 2026
Retell AI logo
Retell AI
Hard
Software Engineer

Design and Implement a Mini SQL Query Engine

You're given a set of in-memory tables — each table is a collection of rows over a known, typed schema (e.g., a table is a list of row objects, and ea...

System Design
16
0
127 people solved
Jan 10, 2026
Patreon logo
Patreon
Easy
Software Engineer

Design org chart lookup with preprocessing

You are given an organization chart represented as a list of pairs [managerName, directReportName]. Names are unique strings. The data may form a fore...

Coding & Algorithms
10
0
93 people solved
Feb 28, 2026
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