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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

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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

Count Employees With Unbroken Renewable Access at the Last Timestamp

An access system grants employees time-limited access. Employee i has a fixed access duration limits[i]. The system receives a log of access settings,...

Coding & AlgorithmsSimulation & State Machines
2
0
28 people solved
Sep 30, 2026
Cohere logo
Cohere
Medium
Software Engineer

Design an Enterprise AI Research Agent With Internal and Web Retrieval and Citations

Design an enterprise-grade AI research agent, similar in spirit to Glean-style workplace search assistants. An employee asks a complex research questi...

System DesignSystem Design FundamentalsAI Agents
4
0
47 people solved
Sep 22, 2026
Waymo logo
Waymo
Medium
Data Scientist

Compare Two Rare-Event Rates with Different Exposure

Compare Two Rare-Event Rates with Different Exposure Two versions were observed over different amounts of mileage, and each produced only a small numb...

Statistics & MathHypothesis TestingProbability
2
0
33 people solved
Sep 28, 2026
Cursor logo
Cursor
Medium
Software Engineer

Build a Merkle Tree over a Directory with Hash Lookup and Tree Diff

Build a Merkle tree that represents a directory on the local file system, so that two snapshots of a directory can be compared quickly. Every file is ...

Software Engineering FundamentalsTrees
8
0
63 people solved
Sep 16, 2026
Rippling logo
Rippling
Hard
Software Engineer

Extend an Expense Rules Engine with Nested Boolean Conditions

Extend an expense rules engine to support nested AND, OR, and NOT conditions. Explain how you would represent, validate, and evaluate expressions such...

Software Engineering FundamentalsParsing & InterpretersLow-Level Design (OOP)
8
0
88 people solved
Sep 11, 2026
Google logo
Google
Medium
Software Engineer

Sliding-Window Mean After Removing the Largest K Values

For every contiguous window of a fixed size, remove the largest k values by multiplicity and compute the mean of the remaining values. Process sliding...

Coding & AlgorithmsTwo Pointers & Sliding WindowData Structure Design
9
0
139 people solved
Sep 1, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Find Tree Height After Deleting Nodes and Promoting Children

Delete selected nodes from a rooted multiway tree. Deleting a node promotes all of its children to its parent; it does not delete the descendants. Ret...

Coding & AlgorithmsTrees
7
0
49 people solved
Sep 20, 2026
Citadel Securities logo
Citadel Securities
Medium
Software Engineer

Design a Top-Ten Trade Query with Exact Amounts

Design a library that parses trade data and returns the top ten buys and sells. Explain the ranking contract, exact amount handling, object responsibi...

Software Engineering FundamentalsLow-Level Design (OOP)Heaps & Priority Queues
4
0
56 people solved
Sep 18, 2026
Capital One logo
Capital One
Medium
Software EngineerSenior+

Analyze and Debug Virtual-Card Payment Rules

Analyze a virtual-card-number feature and explain how you would evaluate and debug its payment-validation rules. Part 1 — Benefits and challenges Disc...

Software Engineering FundamentalsPayments & LedgersDebugging
22
0
228 people solved
Aug 23, 2026
Mercor logo
Mercor
Medium
Software Engineer

Currency Exchange Rate Between Two Currencies via Chained Conversions

You are given a table of currency exchange rates. Each entry [from, to, rate] means that 1 unit of currency from is worth rate units of currency to. F...

Coding & AlgorithmsGraphs
5
0
71 people solved
Sep 13, 2026
Anthropic logo
Anthropic
Hard
Software Engineer

Design a Batched LLM Inference Service Assuming Each Batch Takes 100 ms

Design a service that serves inference requests for a large language model. Each client sends one request containing a prompt and waits for the model'...

System DesignSystem Design FundamentalsLLM Inference & Serving
2
0
24 people solved
Oct 1, 2026
Apple logo
Apple
Medium
Software Engineer

Merge Two Strings Using the Longest Edge Overlap

Merge two ASCII strings by combining an overlapping suffix of the first string with an equal prefix of the second. Try both possible concatenation ord...

Coding & AlgorithmsString Algorithms
6
0
98 people solved
Sep 10, 2026
Cresta logo
Cresta
Medium
Software Engineer

Build a Tool-Calling Chat Agent That Searches and Books Flights via a REST API

In an AI-assisted coding round, you are given an API document (api.md) and a starter script (agent_starter.py). Using AI assistance, implement an AI a...

Software Engineering FundamentalsAPI Integration & HTTP ClientsAI Agents
2
0
41 people solved
Sep 23, 2026
Robinhood logo
Robinhood
Easy
Software Engineer

Find the Top Ten Words When a Book Exceeds Memory

How would you find the ten most frequent words in a book that is too large to load into memory? Explain what changes when even the distinct-word frequ...

System DesignBatch & Stream Processing
6
0
70 people solved
Sep 17, 2026
Pinterest logo
Pinterest
Medium
Software Engineer

Answer Policy Violation Log Queries

Answer Policy Violation Log Queries Implement answer_violation_queries(logs, queries). Each log record is [post_id, policy, timestamp], with all three...

Coding & Algorithms
25
0
182 people solved
Sep 4, 2026
Harvey logo
Harvey
Medium
Software Engineer

Eager Spreadsheet Formulas with Constant-Time Reads

Implement a spreadsheet with set_cell, get_cell, arithmetic formulas, dependency updates, and circular-reference rejection. Each successful write must...

Coding & AlgorithmsData Structure DesignGraphs
7
0
118 people solved
Sep 1, 2026
ZipHQ logo
ZipHQ
Hard
Software Engineer

Find the Guaranteed Capture Time in a Turn-Based Graph Game

Tom and Jerry move on a finite undirected graph. Their starting vertices are given and both always know the current positions. Each second, Jerry move...

Coding & AlgorithmsGraphsDynamic Programming
7
0
67 people solved
Sep 17, 2026
Citadel Securities logo
Citadel Securities
Medium
Software Engineer

Define a Reliable Trade-Reconciliation Library Contract

Design the parsing and domain boundaries of a trade-reconciliation library that identifies unmatched buy/sell records. Explain how timestamp tolerance...

Software Engineering FundamentalsLow-Level Design (OOP)Parsing & Interpreters
3
0
50 people solved
Sep 18, 2026
Optiver logo
Optiver
Hard
Software EngineerIntern

Design an Event-Driven CPU Overheat Controller

Design an Event-Driven CPU Overheat Controller Design an OverheatPreventionController that simulates multiple processor cores without physical sensors...

Software Engineering FundamentalsSimulation & State Machines
468
2
4386 people solved
Jul 2, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Delete the Fewest Tree Nodes to Meet a Height Limit

Given a rooted multiway tree and a maximum allowed height N, return a deletion set with the fewest nodes such that the final height is at most N. Dele...

Coding & AlgorithmsDynamic ProgrammingTrees
7
0
58 people solved
Sep 20, 2026
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