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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
Amazon logo
Amazon
Medium
Data Scientist

Design an Automated Home-Price Valuation Model

Design an Automated Home-Price Valuation Model Scenario You are building an automated house-price valuation service for a real-estate platform. Questi...

Machine Learning
65
0
229 people solved
Aug 4, 2025
Citadel logo
Citadel
Medium
Data Scientist

Implement max profit with K transactions (DP)

Given an array prices[0..n-1] of daily stock prices and an integer k, implement a bottom-up dynamic program to compute the maximum achievable profit w...

Coding & Algorithms
6
0
54 people solved
Oct 13, 2025
Airbnb logo
Airbnb
Hard
Software Engineer

Design a scalable consumer feature

System Design: Scalable, Privacy-Conscious Recommendations Service for a Consumer App Context You are designing a real-time recommendations service fo...

System DesignRecommendation SystemsRanking Models
14
0
211 people solved
Sep 6, 2025
MathWorks logo
MathWorks
Medium
Software Engineer

Decide transform via one-to-one mapping

You are given two strings s and t of equal length over the lowercase English alphabet. In one step, you may pick any character x and replace all its o...

Coding & AlgorithmsGraphsArrays & Strings
16
0
109 people solved
Sep 6, 2025
Google logo
Google
Medium
Software Engineer

How would you answer these behavioral prompts?

You are in a behavioral interview. Prepare structured answers (with concrete examples) for the following prompts. Expect follow-ups such as: Why was y...

Behavioral & Leadership
7
0
73 people solved
Jan 6, 2026
Uber logo
Uber
Medium
Machine Learning Engineer

Explain XGBoost depth, regularization, and dropout

ML Conceptual Questions (Onsite) Answer the following: (a) Gradient-boosted decision trees: How does maximum tree depth affect bias/variance, overfitt...

Machine LearningML FundamentalsNeural Networks & Training
11
0
159 people solved
Sep 6, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Design Experiments to Measure Promotion Scheduling Impact

Design Experiments to Measure Promotion Scheduling Impact Scenario A food delivery marketplace is releasing flexible promotion scheduling (e.g., time-...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
13
0
159 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Data Scientist

Identify Algorithms for Detecting Malicious Duplicated Content

Identify Algorithms for Detecting Malicious Duplicated Content Detecting Malicious Duplicated Text (DOT) Scenario You are selecting technical approach...

Machine Learning
8
0
67 people solved
Aug 4, 2025
Uber logo
Uber
Medium
Software Engineer

Simulate views on an n-ary tree

Given a rooted, ordered n-ary tree (each node has a value and an ordered list of children), simulate an observer who starts at the bottom-left, moves ...

Coding & AlgorithmsTrees
6
0
93 people solved
Sep 6, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Determine dictionary-based string segmentation

You are given a string s and a set of tokens dict. Determine whether s can be segmented into a sequence of one or more tokens from dict. If segmentati...

Coding & Algorithms
5
0
87 people solved
Aug 14, 2025
Meta logo
Meta
Medium
Data Scientist

Calculate Weekly CTR and Campaign-Specific CTR in SQL

AdEvents ad_id | campaign_id | event | view_id | event_date 1 | 10 | impression | 123 | 2023-11-07 1 | 10 | cli...

Data Manipulation (SQL/Python)
69
2
287 people solved
Jul 12, 2025
Databricks logo
Databricks
Medium
Data Scientist

Explain Linear Regression Feature Transformation Equivalence

Explain Linear Regression Feature Transformation Equivalence Linear Regression Feature Representations and High-Dimensional Modelling Context You are ...

Machine LearningRegression & Statistical Modeling
11
0
104 people solved
Aug 4, 2025
Salesforce logo
Salesforce
Medium
Software Engineer

Design O(nm) grouping of rearranged strings

Given an array of strings, group together words that are permutations of the same characters. Provide a baseline solution that sorts each word (O(n · ...

Coding & AlgorithmsArrays & StringsSorting
13
0
115 people solved
Aug 1, 2025
Pinterest logo
Pinterest
Medium
Machine Learning Engineer Locked

First Word Matching Each Prefix Query

This question evaluates a candidate's grasp of string data structures and efficient prefix-matching techniques, core competencies in coding and algori...

Coding & Algorithms
7
0
44 people solved
Jun 3, 2026
Upstart logo
Upstart
Hard
Data Scientist

Implement PAVA spend-smoothing under no-borrowing constraint

Monotone Spending Plan via Isotonic L2 Regression (No-Borrowing) Context: You observe yearly discretionary income profit[1..65] (nonnegative reals) an...

Statistics & MathRegression & Statistical ModelingML Coding
12
0
116 people solved
Oct 13, 2025
Instacart logo
Instacart
Hard
Data Scientist

Compute duration and stopping rules correctly

Experiment Runtime Planning: Same‑Day Delivery Attach Rate You are planning an A/B test on the same‑day delivery attach rate (the proportion of eligib...

Analytics & ExperimentationExperiment Design (A/B Testing)Sequential & Adaptive Testing
14
0
141 people solved
Oct 13, 2025
Instacart logo
Instacart
Hard
Software Engineer Locked

Evaluate query ratios from equations

This question evaluates a candidate's skill in modeling variable ratios as relational structures, reasoning about transitive numeric relationships, an...

Coding & AlgorithmsGraphs
12
0
135 people solved
Jan 22, 2026
Snapchat logo
Snapchat
Hard
Software Engineer

Parallelize the lock BFS safely

Parallelize the lock BFS safely Parallelizing BFS for the Rotating-Lock Problem Context You are given the classic rotating-lock problem (e.g., a 4-whe...

System Design
8
0
63 people solved
Jul 31, 2025
TikTok logo
TikTok
Medium
Machine Learning Engineer

Fix a BST with two misplaced keys

Fix a BST with two misplaced keys You are given the root of a binary search tree in which exactly two nodes’ keys were accidentally swapped. Restore t...

Coding & Algorithms
6
0
43 people solved
Aug 8, 2025
Meta logo
Meta
Medium
Data Scientist

Demonstrate Culture Fit and Motivation in Meta Interview

Demonstrate Culture Fit and Motivation in Meta Interview Behavioral Interview: Culture Fit and Motivation (Meta — Data Scientist, Onsite) Prompt Answe...

Behavioral & Leadership
6
0
44 people solved
Aug 4, 2025
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