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

Affirm

Medium

Software Engineer

Detect Fraud by Propagating Suspicious PII

Detect Fraud by Propagating Suspicious PII Process a stream of underwriting and fraud_flag events in order. Maintain a set of suspicious PII values dr...

Coding & Algorithms

216 people solved

Apr 19, 2026

GoDaddyDoorDashMicrosoft

Medium

Software Engineer

Count Deletions that Balance Index-Parity Sums

Problem Delete exactly one entry from nums and close the gap, giving the remaining entries new zero-based indices. Count the original indices whose de...

Coding & AlgorithmsArrays & Strings

18 people solved

AmazonMicrosoftGoogle

Easy

Software Engineer

Recolor the Connected Component of a Pixel

Problem Starting at image[sr][sc], recolor every pixel reachable through side-adjacent pixels of that starting pixel's original color. Diagonal contac...

Coding & AlgorithmsGrids & Matrices

12 people solved

Rippling

Medium

Software Engineer Locked

Implement A Prioritized Task Scheduler With Parent Dependencies

Review a task scheduler implementation prompt with filtering, due-date ordering, high-priority tie-breaks, create-time ordering, and parent dependenci...

Software Engineering FundamentalsSortingGraphs

Implement a CSAT Sliding Window Tracker

Design and implement a class that tracks customer satisfaction scores over a sliding time window. A customer support conversation has: - conversation_...

Coding & AlgorithmsData Structure DesignStacks & Queues

390 people solved

Apr 1, 2026

Medium

Software Engineer Locked

Block Malicious IPs at an API Gateway Across Data Centers

Design gateway IP-block enforcement with trusted client addresses, versioned rules, fast local checks, expiration, and multi-data-center propagation.

System DesignApplication SecurityCaching

Software EngineerSenior+ Locked

From a Monorepo Commit to an Over-the-Air Vehicle Update, and Choosing What to Build

Trace everything that happens between an engineer pushing a commit to a monorepo and the resulting software being installed on customers' cars, then e...

System DesignCI/CD & DeploymentGraphs

60 people solved

Sep 7, 2026

Design an LLM-Based Coding Assistant

This question evaluates a candidate's ability to design an end-to-end machine learning system, covering model architecture, training data pipelines, e...

ML System DesignLLM ApplicationsLLM Inference & Serving

Pushing Back on a Decision That Hurt Your Team: Process, Review and Delivery Impact

Tell me about a time when you pushed back against a decision that negatively impacted your team. What was the issue? How did it turn out? This was one...

Behavioral & LeadershipConflict & CollaborationLeadership & Influence

Implement a Mutual-Exclusion Lock Without Built-In Locks

Implement a lock: a mutual-exclusion primitive with lock() and unlock(). You may not call any existing lock, mutex, semaphore, monitor or condition va...

Software Engineering FundamentalsConcurrencyOperating Systems

Hardware Engineer Locked

Analyze an Instruction Trace with Latency, Throughput, Cache, and Roofline Constraints

Analyze a simulated instruction trace using dependency latency, issue throughput, cache behavior, arithmetic intensity, and roofline bounds. The solut...

Software Engineering Fundamentals

Design a single-node persistent in-memory cache

Scenario Design a single-machine in-memory cache used by a web service to serve concurrent read and write requests. This is a deliberately low-level s...

System DesignData Structure DesignConcurrency

Count Segments with a Small Product

Problem Count the contiguous nonempty subarrays of nums whose element product is strictly smaller than k. `cpp class Solution { public: int numSub...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings

What You Do When Two People Disagree: Approach and a Real Example

In a behavioral interview for a software engineer role at Google, you are asked: what do you do when two people disagree? Describe your approach and s...

Behavioral & LeadershipConflict & Collaboration

Solve 15 common Apple coding questions

The post summarizes high-frequency coding problems reported for Apple Software Engineer interviews. Practice the following algorithm and data-structur...

Coding & AlgorithmsTwo Pointers & Sliding Window

Software EngineerSenior+

Design a URL-Shortening Service

Design a URL-shortening service. Explain how a long URL receives a short identifier, how redirects are served, and how the service preserves correct m...

System DesignSystem Design FundamentalsAPI Design

Design a Loan System with Borrower Repayments and Periodic Investor Payouts

Design the backend of a loan system. Borrowers hold loans and make repayments on them, and the system periodically pays out to the investors who own t...

System DesignPayments & LedgersDistributed Transactions & Idempotency

Bank With the Largest Sum of Each User's Biggest Single Transfer

Users of a trading app move money between the app and bank accounts they have linked to it. Two tables record the linked accounts and the transfers. F...

Data Manipulation (SQL/Python)SQL

Software Engineer Locked

Implement a Set with Readable Snapshots

Implement a set that supports add(value), remove(value), contains(value), snapshot(), and containsAt(snapshot_id, value). Make the API or object bound...

Software Engineering FundamentalsData Structure Design

Site Reliability Engineer Locked

Compare Python Generators, Decorators, and Context Managers

Compare Python generators, decorators, and context managers through their protocols and execution timing, then combine them in a synchronous lazy file...

Software Engineering Fundamentals

192 people solved

Aug 16, 2026

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Tech Interview Questions

Detect Fraud by Propagating Suspicious PII

Count Deletions that Balance Index-Parity Sums

Recolor the Connected Component of a Pixel

Implement A Prioritized Task Scheduler With Parent Dependencies

Implement a CSAT Sliding Window Tracker

Block Malicious IPs at an API Gateway Across Data Centers

From a Monorepo Commit to an Over-the-Air Vehicle Update, and Choosing What to Build

Design an LLM-Based Coding Assistant

Pushing Back on a Decision That Hurt Your Team: Process, Review and Delivery Impact

Implement a Mutual-Exclusion Lock Without Built-In Locks

Analyze an Instruction Trace with Latency, Throughput, Cache, and Roofline Constraints

Design a single-node persistent in-memory cache

Count Segments with a Small Product

What You Do When Two People Disagree: Approach and a Real Example

Solve 15 common Apple coding questions

Design a URL-Shortening Service

Design a Loan System with Borrower Repayments and Periodic Investor Payouts

Bank With the Largest Sum of Each User's Biggest Single Transfer

Implement a Set with Readable Snapshots

Compare Python Generators, Decorators, and Context Managers

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