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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.0k
Companies
570
Updated
10.05.2026
12.0k Questions 570 Companies10.05.2026
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
Medium
Software Engineer Locked

Break Adjacent Duplicate Characters

Practice counting the minimum replacements required to break adjacent duplicates across many lowercase words.

Coding & Algorithms
4
0
43 people solved
Aug 28, 2026
Walmart Labs logo
Walmart Labs
Medium
Software EngineerSenior+ Locked

Count Months Whose First Day Is Sunday

Count months beginning on Sunday across an inclusive Gregorian year range without a calendar library, using the 2000 weekday anchor and correct forwar...

Coding & Algorithms
9
0
83 people solved
Aug 15, 2026
Glean logo
Glean
Medium
Machine Learning Engineer

Find Earliest Train Route

You are given a discrete train timetable and need to find a valid route through the train network. Each train has an itinerary represented as a sequen...

Coding & Algorithms
19
0
189 people solved
Apr 23, 2026
Ramp logo
Ramp
Medium
Software Engineer

Implement a multi-level digital recipe manager

Implement a RecipeManager class for a digital recipe manager. The task is progressive (Levels 1–4). You can assume a single-process in-memory implemen...

Coding & AlgorithmsData Structure Design
56
0
578 people solved
Mar 4, 2026
Snapchat logo
Snapchat
Medium
Software Engineer

Remove the Maximum Number of Connected Stones

Remove the Maximum Number of Connected Stones Implement max_removed_stones(stones). Each stone occupies a unique integer coordinate [row, column] on a...

Coding & Algorithms
5
0
53 people solved
Aug 19, 2026
Meta logo
Meta
Medium
Software EngineerSenior+

Design a Reliable Notification System

Design a notification system. Explain the storage choices, recipient fanout strategy, behavior under high traffic, and reliability model. Include the ...

System DesignReal-Time SystemsDistributed Transactions & Idempotency
4
0
58 people solved
Aug 25, 2026
Robinhood logo
Robinhood
Medium
Software EngineerSenior+

Design Payment Processing with Idempotency and Reconciliation

Design a payment-processing service. It accepts payment requests from clients, sends them to an external payment provider, records each outcome durabl...

System DesignPayments & LedgersDistributed Transactions & Idempotency
2
0
25 people solved
Sep 4, 2026
Applied Intuition logo
Applied Intuition
Medium
Software Engineer Locked

Design Sensor Data Processing With AI-Assisted Implementation

Prepare for a sensor-data processing system design prompt where an AI-assisted coding exercise leads into storage and scaling questions. The interview...

System Design
14
0
101 people solved
Jul 5, 2026
Cisco logo
Cisco
Easy
Software Engineer

Python Multiple Inheritance: Which Parent Method Runs When Names Collide

Two classes each define a method with the same name. A third class inherits from both of them. When that method is called on an instance of the third ...

Software Engineering FundamentalsProgramming Languages
0
0
6 people solved
Sep 19, 2026
Amazon logo
Amazon
Medium
Software EngineerNew Grad Locked

Compute Edit Distance

Implement a function that returns the minimum insertions, deletions, and replacements needed to transform one lowercase string into another. Handle em...

Coding & AlgorithmsDynamic Programming
58
1
488 people solved
Jul 15, 2026
Amazon logo
Amazon
Medium
Software Engineer AI Locked

Fix the Password Reset Workflow

This question evaluates debugging and software engineering fundamentals around authentication flows, including verification code generation and expiry...

Software Engineering FundamentalsDebuggingAuthentication & Authorization
58
0
460 people solved
Apr 14, 2026
Oracle logo
Oracle
Medium
Software Engineer Locked

Design a Five-Minute Top-K Error Log Service

Design a fault-tolerant log service that ranks microservices by error count over a trailing five-minute window. The solution separates durable ingesti...

System Design
5
0
44 people solved
Sep 5, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Software Engineer Locked

Count Digit-Reversal Equivalent Pairs

This Hudson River Trading coding question tests hash-based counting for pairs that become equivalent after a digit-reversal transform. It is useful fo...

Coding & Algorithms
9
0
122 people solved
Jul 2, 2026
Salesforce logo
Salesforce
Medium
Software Engineer

Design a coffee ordering system

System Design: Coffee Ordering System Design a system for a coffee shop (and later a chain of stores) that lets customers order drinks for pickup or i...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
824
4
7649 people solved
Jan 22, 2026
Waymo logo
Waymo
Medium
Software Engineer

Describe a Complex Project You Worked On and Why It Was Challenging

In a hiring-manager round, the core behavioral question is: "Tell me about a complex project you worked on. Why was it challenging?" A closely related...

Behavioral & LeadershipProject Deep Dive
1
0
15 people solved
Sep 10, 2026
Retell AI logo
Retell AI
Medium
Software Engineer Locked

Query an Indexed In-Memory Numeric Table

Build reusable column indexes for an immutable numeric table, then answer range-filter queries that combine conditions with logical AND. The task test...

Coding & Algorithms
10
0
104 people solved
Jul 27, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Count Customers Who Visited on Multiple Dates

Count distinct customers who entered a store on at least two different dates, treating repeated logs for the same customer and date as one visit date.

Coding & AlgorithmsArrays & Strings
60
1
412 people solved
Aug 16, 2026
Coupang logo
Coupang
Easy
Software Engineer Locked

Find the Closest Value in a Binary Search Tree

Practice finding the unique closest value to a numeric target while exploiting binary-search-tree ordering.

Coding & Algorithms
4
1
38 people solved
Aug 25, 2026
Notion logo
Notion
Medium
Software Engineer Locked

Design a Todo List Object Model

This question evaluates object-oriented design and API modeling skills, focusing on domain modeling, class responsibilities, encapsulation, and design...

Software Engineering FundamentalsLow-Level Design (OOP)Code Quality & Maintainability
49
0
676 people solved
Jun 1, 2026
xAI logo
xAI
Medium
Frontend Engineer

Render Nested JSON in a Code-Style Viewer

Implement a React viewer that displays a supplied JSON object in a code-editor-like format. Show nested structure clearly without making the content e...

Software Engineering FundamentalsReact & UI FrameworksTrees
1
0
15 people solved
Sep 15, 2026
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