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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
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Debug a broken Transformer implementation

You are given a small Transformer model implementation (e.g., in PyTorch) plus a tiny training script. The code executes, but the model does not match...

Machine LearningML CodingTransformers & Attention
190
0
1353 people solved
Jan 21, 2026
Meta logo
Meta
Medium
Data Engineer Locked

Define metrics and data model for product features

This question evaluates a candidate's product sense and data engineering competency, including defining core success metrics, designing dashboard visu...

System DesignDimensional ModelingMetrics & KPIs
21
0
171 people solved
Mar 1, 2026
Scale AI logo
Scale AI
Medium
Software Engineer

Compute party time blocks per neighborhood

You are given two datasets: 1. Parties: - party_id (string or integer) - start_timestamp (e.g., UNIX timestamp or datetime) - end_timestamp (...

Coding & AlgorithmsIntervals & Scheduling
42
0
380 people solved
Dec 8, 2025
OpenAI logo
OpenAI
Hard
Software Engineer

Design an Online Development Box

Design an online development box: a remote workspace where a developer can edit files, run development tools, and reconnect to the same project from a...

System DesignSystem Design FundamentalsSandboxing & Isolation
0
0
7 people solved
Jul 16, 2026
Amazon logo
Amazon
Medium
Frontend EngineerNew Grad Locked

Drive an Improvement Beyond Your Formal Responsibilities

Describe a worthwhile improvement beyond your formal role, including evidence for its priority, influence without authority, a testable first step, me...

Behavioral & Leadership
1
0
20 people solved
Aug 22, 2026
Meta logo
Meta
Hard
Software EngineerNew Grad

Compute the Dot Product of Sparse Vectors

Problem Each sparse vector is represented as a list of [index, value] pairs sorted by strictly increasing index; omitted positions have value zero. Re...

Coding & Algorithms
2
0
40 people solved
Dec 21, 2025
MongoDB logo
MongoDB
Medium
Software Engineer Locked

Implement a thread-safe high-concurrency LRU cache

This question evaluates understanding of concurrent data structures, synchronization strategies, and LRU cache semantics within the Coding & Algorithm...

Coding & AlgorithmsData Structure DesignConcurrency
28
0
222 people solved
Jan 22, 2026
C3 AI logo
C3 AI
Hard
Data Scientist Locked

Give Evidence-Based Strengths, Weaknesses, and Feedback

Answer strengths, weaknesses, manager and peer feedback, and project-learning questions with one evidence-based narrative that shows self-awareness an...

Behavioral & Leadership
1
0
16 people solved
Aug 15, 2026
Google logo
Google
Medium
Software Engineer

Solve Quickselect, Tree Distance, and Prefix Substrings

You are given three independent coding tasks. 1. Implement Quickselect - Given an unsorted integer array nums and an integer k, return the k-th sma...

Coding & Algorithms
8
0
96 people solved
Apr 25, 2026
Netapp logo
Netapp
Medium
Software Engineer Locked

Merge Two Sorted Singly Linked Lists

Merge two nondecreasing singly linked lists by relinking existing nodes with constant auxiliary node storage, taking from the first list when current ...

Coding & Algorithms
3
0
26 people solved
Aug 9, 2026
eBay logo
eBay
Medium
Software EngineerSenior+

Assign Ads to Browser Positions

Implement a function that assigns ads to browser positions for a single user. You are given: - positions: a list of browser position identifiers, such...

Coding & Algorithms
2
0
46 people solved
Apr 13, 2026
Google logo
Google
Easy
Software Engineer

Find largest digit-sharing subset

You are given an array of N integers. Each integer has exactly two decimal digits (i.e., each element is between 10 and 99 inclusive). You want to cho...

Coding & AlgorithmsArrays & Strings
17
0
206 people solved
Dec 8, 2025
Intuit logo
Intuit
Medium
Data Scientist

Calculate Cohort Retention

You are given two tables: users - user_id BIGINT PRIMARY KEY - signup_ts TIMESTAMP user_events - user_id BIGINT - event_ts TIMESTAMP - event_name VARC...

Data Manipulation (SQL/Python)SQLSegmentation & Cohort Analysis
28
0
276 people solved
Feb 23, 2026
Pinduoduo logo
Pinduoduo
Hard
Software EngineerSenior+

Count Longest Substrings After Character Replacements

You are given an uppercase English string s and a nonnegative integer k. A nonempty contiguous substring is valid if you can make all of its character...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
1
0
14 people solved
Aug 22, 2026
Google logo
Google
Medium
Software Engineer Locked

Find Shortest Queue with Few Calls

This question evaluates algorithm design and analysis skills, focusing on working with restricted data structure APIs and minimizing total operations ...

Coding & AlgorithmsStacks & Queues
10
2
120 people solved
Apr 10, 2026
Optiver logo
Optiver
Hard
Data Scientist Locked

How to rank statements by likelihood

This question evaluates proficiency in data interpretation, probabilistic reasoning, and statistical literacy for ranking statement likelihoods from v...

Machine LearningProbabilityPuzzles & Brainteasers
27
0
294 people solved
Feb 3, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Refactor a Chatbot into Clean Object-Oriented Components

Prepare for a OpenAI software engineering interview question about refactor a chatbot into clean object-oriented components. The prompt highlights pra...

Software Engineering FundamentalsCode Quality & MaintainabilityLow-Level Design (OOP)
15
0
158 people solved
Jun 22, 2026
Anthropic logo
Anthropic
Hard
Software Engineer Locked

Debug Tokenization and Detokenization

Debug Python tokenization and detokenization functions while preserving their ID-only public interface. Repair iteration-order matching, reject unknow...

Software Engineering FundamentalsDebuggingParsing & Interpreters
59
0
397 people solved
Jul 8, 2026
Databricks logo
Databricks
Medium
Software Engineer Locked

Implement a Snapshot Set Iterator

This question evaluates data structure design, versioning, and iterator consistency concepts within the Coding & Algorithms domain, focusing on implem...

Coding & Algorithms
9
0
82 people solved
May 24, 2026
Optiver logo
Optiver
Medium
Software Engineer

Design a queue and analyze tradeoffs

Design a FIFO queue data structure that supports enqueue, dequeue, peek, and isEmpty. Compare implementations using a singly linked list, a dynamic ar...

Coding & AlgorithmsData Structure Design
55
0
462 people solved
Sep 6, 2025
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