Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

12.2k

Companies

569

Updated

10.14.2026

12.2k Questions 569 Companies10.14.2026

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

Figma

Medium

Software Engineer

Design document editor with undo/redo and batching

Design a document-editing layer that supports applying edits and undo. Implement an API with apply(Operation op), undo(), and getText(). Then add tran...

Coding & AlgorithmsData Structure Design

Machine Learning EngineerSenior+ Locked

Explain LLM training, RL, and evaluation

This question evaluates understanding of the full large language model lifecycle and associated competencies, including pre-training, supervised fine-...

Machine LearningFine-Tuning & Alignment TechniquesReinforcement Learning

Design a crash-resilient file system

Prompt Design a resilient file system that can recover file contents correctly after a system crash (e.g., power loss / kernel panic). The interviewer...

System DesignOperating Systems

All Subsequences After Deleting One Character

You are given a string s of length n consisting of lowercase English letters. Consider every string that can be obtained by deleting exactly one chara...

Implement a Radix Cache for Integer Sequences

Implement a RadixCache — a radix tree (prefix-compressed trie) that stores sequences of integers. In a plain trie, every node holds exactly one elemen...

Compute currency conversions with graph algorithms

Question You are given a set of pairwise currency exchange relations such as A:B = 1:1.5 and B:C = 1:1.5, meaning 1 A = 1.5 B and 1 B = 1.5 C. Design ...

Minimize Points Used Across Multiple Reward Programs

Problem A customer has several reward programs. Program i has at most balance[i] points, and each point is worth value[i] integer microdollars. Given ...

Software Engineer Locked

Format Bytes as a Hex and ASCII Dump

Format bytes into fixed-width lowercase hex and printable ASCII dump lines with exact offsets, padding, field separators, and final-line behavior.

Recommend Build vs Buy for Restaurants

You are the Product Manager for a low-code or no-code website builder for restaurants. The product helps restaurant owners create websites quickly and...

Product / Decision MakingProduct StrategyBusiness Case Analysis

Solve 12 coding interview problems

Below are multiple independent coding problems. --- Problem 1: Reduce an integer to 0 with $\pm 2^i$ You are given a positive integer $n$. In one ...

Coding & AlgorithmsDynamic ProgrammingBinary Search

Create OHLC Aggregates from Tick Data in Python

price_stream +-----------+-------+ | timestamp | price | +-----------+-------+ | 0 | 3 | | 1 | 2 | | 2 | 4 | | 3 ...

Data Manipulation (SQL/Python)

Software Engineer Locked

Solve cache, grid path, and substring problems

This multipart question evaluates algorithmic problem-solving and data structure design skills, covering a capacity-bounded cache with eviction behavi...

Quantitative TraderIntern

Analyze Optimal Funding Allocations Across Election Districts

Prompt Two players allocate nonnegative integer funding units across labeled election districts. In each district, the player with more funding wins t...

Identify Transactions During 'Golden' Membership Period

Data Manipulation (SQL/Python)

Machine Learning Engineer Locked

Design a news feed ranking system

This question evaluates a candidate's ability to architect a scalable, low-latency personalized news feed recommendation system, assessing competencie...

ML System DesignRecommendation SystemsEmbeddings & Vector Search

Machine Learning Engineer

Choose Labels and Losses for Multiple Engagement Outcomes

How would you represent labels and choose a loss when a model predicts several engagement outcomes or engagement levels? Explain the difference betwee...

Machine LearningSupervised LearningModel Evaluation

Software Engineer Locked

Design a payment system with holds and batching

This question evaluates a candidate's competency in designing reliable, auditable payment workflows, covering authorization holds, batch settlement, i...

System DesignPayments & LedgersDistributed Transactions & Idempotency

Estimate impact of global launch without holdout

Causal Lift Plan After a Global Launch Without a Holdout Background A new product feature was launched globally on 2025-05-10, with no control or hold...

Analytics & ExperimentationCausal InferenceLaunch Evaluation

Implement an LRU cache

Problem: LRU Cache Design and implement a data structure that supports an LRU (Least Recently Used) cache with a fixed capacity. Requirements Implemen...

Coding & AlgorithmsData Structure Design

Implement a Reusable Cyclic Barrier from a Mutex and Condition Variables

Implement a cyclic barrier. The barrier is created for a fixed number of threads, called parties. Each thread calls wait() when it reaches a synchroni...

Software Engineering FundamentalsConcurrency

3 people solved

Aug 28, 2026

Tech Interview Questions

Design document editor with undo/redo and batching

Explain LLM training, RL, and evaluation

Design a crash-resilient file system

All Subsequences After Deleting One Character

Implement a Radix Cache for Integer Sequences

Compute currency conversions with graph algorithms

Minimize Points Used Across Multiple Reward Programs

Format Bytes as a Hex and ASCII Dump

Recommend Build vs Buy for Restaurants

Solve 12 coding interview problems

Create OHLC Aggregates from Tick Data in Python

Solve cache, grid path, and substring problems

Analyze Optimal Funding Allocations Across Election Districts

Identify Transactions During 'Golden' Membership Period

Design a news feed ranking system

Choose Labels and Losses for Multiple Engagement Outcomes

Design a payment system with holds and batching

Estimate impact of global launch without holdout

Implement an LRU cache

Implement a Reusable Cyclic Barrier from a Mutex and Condition Variables

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ML System Design

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