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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 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
Alibaba logo
Alibaba
Medium
Site Reliability EngineerSenior+

Monitoring and Alerting for a Service You Operate as the Sole On-Call Engineer

You would be the only engineer in a US office who deploys and develops a cloud service and keeps it running. The service runs in the company's own US ...

Software Engineering FundamentalsObservabilityReliability & SRE
1
0
21 people solved
Oct 11, 2026
Anthropic logo
Anthropic
Hard
Software EngineerSenior+

Design an LLM Prompt Playground: Schema, Large Prompts, Sharing and Tiny Edits

Design a prompt playground: a web application where users write prompts for a large language model (LLM), run them against a model, and see the output...

System DesignSystem Design FundamentalsFile & Media Storage
19
0
140 people solved
Jul 26, 2026
Mercor logo
Mercor
Medium
Software Engineer

Probability That One Customer's Two Coffees Beat Another's Two

A coffee shop's drinks vary in quality from cup to cup. Customer A and customer B each buy two cups. What is the probability that A's two cups taste b...

Statistics & MathProbabilityPuzzles & Brainteasers
7
0
51 people solved
Oct 4, 2026
Pinterest logo
Pinterest
Hard
Software Engineer Locked

Count Distinct Active Pins per Time Segment from Overlapping Interaction Logs

Given pin interaction logs with start and end times, count how many distinct pins are active in each time segment when the same pin can have many over...

Coding & AlgorithmsIntervals & Scheduling
25
0
176 people solved
Sep 2, 2026
Rippling logo
Rippling
Hard
Software EngineerSenior+

Design a Package Tracking Widget for an Email Inbox

Design a package tracking widget for a Gmail-like consumer email product. When a shipping or order email arrives, the system extracts the carrier trac...

System DesignSystem Design FundamentalsAPI Integration & HTTP Clients
27
0
250 people solved
Aug 1, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Design a Donation System for a Three-Day Fundraising Campaign

Design a system that collects donations during a fundraising campaign that runs for three days. Donors pick a charity, choose an amount and pay. The s...

System DesignPayments & LedgersDistributed Transactions & Idempotency
13
0
121 people solved
Sep 16, 2026
Stripe logo
Stripe
Hard
Software Engineer Locked

Find Weekly Deployment Windows Across Time Zones

Find fixed-duration deployment windows on a repeating UTC week by translating local allow and freeze rules, respecting lead time, wraparound intervals...

Coding & AlgorithmsIntervals & Scheduling
157
0
2344 people solved
Aug 27, 2026
Abridge logo
Abridge
Hard
Software Engineer

Expand a Nested Repeat-Count Encoded String

You are given an encoded string s. The encoding rule is k[text]: the text inside the square brackets is repeated exactly k times, where k is a positiv...

Coding & AlgorithmsStacks & QueuesParsing & Interpreters
2
0
57 people solved
Sep 24, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Explain an AI-Assisted Workflow from Design to Code

How do you use AI assistance across design and implementation in your daily work? What a Strong Answer Covers Describe a concrete completed workflow, ...

Behavioral & LeadershipAI-Assisted Development
1
0
13 people solved
Oct 23, 2026
Rippling logo
Rippling
Medium
Software Engineer Locked

Design News Pull Scheduling, Article Storage, and Topic Reads

Design topic-based news aggregation with durable pull scheduling, retry-safe article storage, stable pagination, and a read path that controls latency...

System DesignSearch & Feed SystemsDistributed Transactions & Idempotency
23
0
280 people solved
Sep 10, 2026
Roblox logo
Roblox
Medium
Software Engineer

Implement Search Autocomplete with a Trie

Explain how to implement search autocomplete using a trie. Describe how stored strings are indexed, how a typed prefix finds candidates, and how you w...

Software Engineering FundamentalsTreesString Algorithms
1
0
16 people solved
Oct 16, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Demonstrate Ownership beyond Your Assigned Task

Tell me about a time you took ownership of a problem beyond the narrow task assigned to you. What a Strong Answer Covers Explain the gap you noticed, ...

Behavioral & LeadershipOwnership & Execution
1
0
12 people solved
Oct 23, 2026
Roblox logo
RobloxCapital OneMeta

Also asked at Meta, Bloomberg, Google, TikTok, Uber, Pinterest, Visa, Braze

Medium
Software Engineer

Stabilize a Board by Simultaneous Matches

Problem On a rectangular board, positive integers identify candy types and zero denotes an empty cell. Simultaneously remove every horizontal or verti...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
5
0
36 people solved
Capital One logo
Capital One
Hard
Software Engineer

Minutes Until the Next Bus From a Daily Departure Schedule

A bus stop publishes the departure time of every bus for one day. Given that schedule and the current time, return how many minutes you have to wait u...

Coding & AlgorithmsArrays & Strings
9
0
90 people solved
Sep 10, 2026
Harvey logo
Harvey
Medium
Software Engineer Locked

Design File Storage with Metadata, Access Control, and Chunked Uploads

Design drive-style file storage with metadata and blob separation, ACL checks, resumable chunk uploads, atomic publication, and version conflicts.

System DesignFile & Media StorageAuthentication & Authorization
24
0
160 people solved
Sep 1, 2026
Google logo
Google
Medium
Product Manager

Detecting and Containing LLM Hallucinations in a Customer-Facing AI Product

A generative AI system is live, and actual customers depend on its answers, but it sometimes produces confident statements that are false or that no s...

Machine LearningAI Product ManagementLLM Applications
3
0
29 people solved
Oct 6, 2026
Bnsf logo
Bnsf
Medium
Software Engineer

Tell Me About a Time You Had to Meet a Tight or At-Risk Deadline

Tell me about a time you had to meet a deadline that was tight or at risk. What was at stake, what did you do, and how did it turn out? The report nam...

Behavioral & LeadershipOwnership & Execution
0
0
7 people solved
Oct 30, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Connect Career Goals to the Work You Want to Own

What are your career goals, and how do they connect to the kind of engineering work you want to do next? What a Strong Answer Covers Describe concrete...

Behavioral & LeadershipMotivation & Fit
0
0
10 people solved
Oct 23, 2026
Uber logo
Uber
Hard
Software Engineer

Count Islands of Connected Land Cells in a Binary Grid

You are given an m x n grid where 1 is land and 0 is water. An island is a maximal group of land cells connected horizontally or vertically. Return th...

Coding & AlgorithmsGrids & Matrices
12
0
86 people solved
Sep 29, 2026
Meta logo
Meta
Medium
Software Engineer

Design a People-You-May-Know Friend Recommendation System

Design a friend recommendation feature ("people you may know") for a large social network. Each user sees a list of people they are not yet connected ...

System DesignRecommendation SystemsRetrieval & Candidate Generation
17
0
143 people solved
Sep 14, 2026
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