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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
EliseAI logo
EliseAI
Medium
Software Engineer

Design an OpenAI chatbot in two hours

Design and Build a Minimal Conversational Chatbot (2-Hour Coding Exercise) You are given an OpenAI API key and two hours. Design and implement a minim...

ML System DesignAPI Integration & HTTP ClientsLLM Applications
40
0
578 people solved
Sep 6, 2025
Attentive logo
Attentive
Medium
Software Engineer Locked

Design Storage for a Flexible Metrics Monitoring System

Design persistence for a metrics monitoring system by working backward from concrete query patterns. Choose record identity, partitions, indexes, retr...

System Design
7
1
66 people solved
Jul 26, 2026
Meta logo
Meta
Medium
Backend Engineer AI Locked

Solve coding and AI-assisted tasks

This set evaluates algorithmic problem-solving across arrays, immutable linked-list interfaces, parent-pointer tree traversal, string validity via min...

Coding & AlgorithmsGrids & MatricesLinked Lists
18
0
138 people solved
Apr 8, 2026
Capital One logo
Capital One
Medium
Software Engineer Locked

Arrange Match Results in Repeating Win-Draw-Loss Order

Rearrange a multiset of win, draw, and loss markers into repeated W-D-L rounds, skipping any marker once its supply is exhausted. The problem tests ex...

Coding & Algorithms
10
0
84 people solved
Jul 21, 2026
Bobyard logo
Bobyard
Medium
Software Engineer Locked

Build Nested Comments from Parent References

Transform flat comments with parent IDs into a validated nested forest, even when children arrive before parents. Build an ID index, detect missing li...

Software Engineering Fundamentals
2
0
34 people solved
Aug 1, 2026
Amazon logo
Amazon
Easy
Software EngineerIntern Locked

Determine Whether One Person Can Attend Every Meeting

Determine whether one person can attend every meeting in a collection of half-open time intervals. This question checks overlap reasoning, endpoint se...

Coding & Algorithms
7
0
56 people solved
Aug 1, 2026
Optiver logo
Optiver
Easy
Quantitative Researcher

Stone Pile Doubling Game: Can One Pile Be Emptied?

You are given two piles of stones containing a and b stones respectively (both piles start non-empty). You repeatedly apply the following move: - Let ...

Coding & Algorithms
15
0
147 people solved
Jul 26, 2025
Oscar logo
Oscar
Easy
Software EngineerSenior+ Locked

Design a Stateful Outreach Campaign Engine

Design a per-client outreach campaign that sends email and timed text follow-ups, stops on response, and records terminal failure or unresponsiveness....

System Design
4
0
41 people solved
Jul 14, 2026
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Design a simple API rate limiter

This question evaluates competency in designing scalable, low-latency API rate limiting, covering distributed-systems reasoning, storage and caching t...

System DesignRate LimitingSystem Design Fundamentals
11
0
123 people solved
Feb 11, 2026
Nike logo
Nike
Medium
Software Engineer Locked

Choose a Sorting Algorithm from Workload Constraints

Choose sorting approaches for a worst-case-sensitive array, a stable linked list, an external data stream, and a nearly sorted UI array by connecting ...

Software Engineering Fundamentals
1
0
13 people solved
Aug 4, 2026
Roblox logo
Roblox
Medium
Data Scientist

Write SQL for ads metrics and variability

Write ANSI SQL to compute daily and campaign-level metrics, including averages and standard deviations of daily CTR and CPC, using the schema and samp...

Data Manipulation (SQL/Python)
5
0
42 people solved
Oct 13, 2025
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Design an RBAC Relational Schema

This question evaluates relational schema design and access-control modeling skills by testing understanding of RBAC concepts (users, roles, permissio...

System Design
8
0
69 people solved
May 27, 2026
Uber logo
Uber
Medium
Software EngineerSenior+

Find Any Available Meeting Room

You are given multiple meeting rooms. For each room, the existing bookings are represented as a list of non-overlapping time intervals sorted by start...

Coding & Algorithms
15
0
92 people solved
Apr 16, 2026
Omnissa logo
Omnissa
Medium
Software Engineer Locked

Check Whether a Singly Linked List Is a Palindrome

Construct a singly linked list and test whether its values form a palindrome. The exercise requires linear time and constant auxiliary space for the c...

Coding & Algorithms
3
0
29 people solved
Sep 4, 2026
Affirm logo
Affirm
Easy
Software Engineer Locked

Compute Available Offers per User

This question evaluates event-stream processing, stateful per-user counting, and time-window filtering competencies, requiring correctness with ordere...

Coding & AlgorithmsSimulation & State MachinesArrays & Strings
17
0
134 people solved
Mar 13, 2026
Point72 logo
Point72
Hard
Data Engineer

Design Data Quality and Observability Pipeline

Design a production data orchestration, data quality, and observability framework for batch and streaming data pipelines. Your design should address: ...

System DesignData Quality & ValidationWorkflow Orchestration
17
0
121 people solved
Apr 30, 2026
Meta logo
Meta
Hard
Data Scientist

Compute High-Call Usage Rates

You are given two tables for a voice-calling product: users - user_id BIGINT - country_code STRING calls - call_id BIGINT - caller_id BIGINT - recipie...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
6
0
52 people solved
Mar 4, 2026
Google logo
Google
Medium
Software EngineerIntern Locked

Find shortest subarray with at least k distinct

This question evaluates proficiency in array manipulation, frequency counting, and efficient tracking of distinct values within contiguous subarrays, ...

Coding & AlgorithmsTwo Pointers & Sliding Window
9
0
121 people solved
Jan 6, 2026
Microsoft logo
Microsoft
Medium
Software EngineerSenior+

Implement SQL Table and DNA Ordering

Two independent coding exercises were asked. Solve both. Problem A: CSV-backed in-memory table Build a tiny in-memory relational table initialized fro...

Coding & Algorithms
5
0
59 people solved
Apr 10, 2026
Amazon logo
Amazon
Medium
Applied Scientist

Design an S3-like object storage service

Design a cloud object storage service similar to Amazon S3. The service should allow clients to upload, store, and download large files reliably and e...

System DesignFile & Media StorageStorage & Sharding
49
0
462 people solved
Dec 8, 2025
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