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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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

Write and explain gradient descent pseudocode

Task: Batch Gradient Descent for Linear Regression (with Intercept) You are interviewing for a Data Scientist role and are asked to implement batch gr...

Machine Learning
10
0
84 people solved
Oct 13, 2025
J.P. Morgan logo
J.P. Morgan
Easy
Software Engineer

Design a URL shortener

Design a URL shortening service similar to Bitly. The service should accept a long URL and return a short alias, and visiting the short URL should red...

System DesignSystem Design FundamentalsAPI Design
25
0
171 people solved
Mar 10, 2026
Autodesk logo
Autodesk
Medium
Machine Learning Engineer

Explain 3D geometry data

Explain 3D geometry data 3D Geometry Data: Representations, Preprocessing, Modeling, and Serving Prompt You are working with 3D geometry data in ML pi...

Machine Learning
15
0
107 people solved
Jul 17, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Count Recent High-Volume Call Users

This question evaluates SQL data manipulation and analytical querying skills, including time-window filtering, joins between user and call tables, rol...

Data Manipulation (SQL/Python)SQL
25
1
163 people solved
Mar 14, 2026
Meta logo
Meta
Medium
Data Scientist

Compute cohort GMV and payer rate with edge cases

You are given the following schema (timestamps are UTC): users(user_id INT, country STRING, created_at TIMESTAMP) events(user_id INT, event_ts TIMESTA...

Data Manipulation (SQL/Python)SQLSegmentation & Cohort Analysis
12
0
102 people solved
Oct 13, 2025
Salesforce logo
Salesforce
Medium
Software Engineer

Deduplicate a Linked List

Given a singly linked list, remove duplicate values in-place. Variant A (sorted list): delete repeated nodes so each value appears once using O( 1) ex...

Coding & Algorithms
6
0
73 people solved
Jul 28, 2025
NVIDIA logo
NVIDIA
Medium
Software Engineer

Optimize a small-string C++ class

You are implementing a high-performance C/C++ string type that uses a small-string optimization: short strings are stored inline in a fixed buffer, an...

Software Engineering FundamentalsProgramming LanguagesMemory Management
16
0
156 people solved
Dec 18, 2025
LinkedIn logo
LinkedIn
Medium
Machine Learning Engineer

Design LinkedIn Learning course recommendations

Design a mini ML system to recommend LinkedIn Learning courses to a user. Product goal: - Recommend courses that help the user succeed in their job se...

ML System Design
11
0
105 people solved
Feb 18, 2026
Amazon logo
Amazon
Hard
Software Engineer Locked

Prepare Leadership Principle Stories

This question evaluates leadership, ownership, decision-making, communication, and problem-solving competencies through concrete first-person project ...

Behavioral & LeadershipOwnership & ExecutionAmbiguity & Decision Making
17
0
321 people solved
May 11, 2026
Optiver logo
Optiver
Hard
Data Scientist

Find next terms in sequences

Pattern Recognition: Find the Rule and Next Term You are given 8 number sequences. For each sequence: - Identify a clear rule that generates the terms...

Statistics & MathPuzzles & Brainteasers
35
0
238 people solved
Sep 6, 2025
MathWorks logo
MathWorks
Easy
Software Engineer

Minimize shortest path by adding weight-1 edges

You are given a weighted directed graph with nodes labeled 1..n. The existing edges are described by three arrays of equal length m: - from[i]: start ...

Coding & Algorithms
4
0
65 people solved
Mar 1, 2026
Amazon logo
Amazon
Hard
Software Engineer

Maximize total bandwidth of data channel pairs

You are optimizing how information flows through a network of processing nodes. There are n processing nodes. The bandwidth capability of the i-th nod...

Coding & Algorithms
6
0
68 people solved
Oct 1, 2025
Confluent logo
Confluent
Medium
Software EngineerSenior+

Design a Podcast Publishing System That Delivers New Episodes to Followers

Design a podcast publishing system. Creators publish episodes of their shows; listeners follow shows and expect to see new episodes from the shows the...

System DesignSearch & Feed SystemsDistributed Transactions & Idempotency
0
0
1 people solved
Aug 29, 2026
Google logo
Google
Medium
Software Engineer

Design Interval Membership Queries with Linear, Logarithmic, and Constant-Time Options

Interview Prompt Design a class with addNonOverlappingInterval(start, end) and contains(x). Compare a straightforward O(n) query, an O(log n) query, a...

Software Engineering Fundamentals
2
0
26 people solved
Feb 20, 2026
LinkedIn logo
LinkedIn
Hard
Data Scientist

Measure Causal Impact of Self-Selected App Redesign

Measure Causal Impact of a Self-Selected App Redesign A mobile app ships a redesigned UI as a new version. Users opt in by upgrading, so a standard ra...

Statistics & Math
76
0
267 people solved
Jul 12, 2025
Google logo
Google
Medium
Data Scientist

Build and evaluate a full ML pipeline

You must predict both (1) probability that a user will spend >$0 in the next 7 days (classification) and (2) expected spend in the next 7 days (regres...

Machine LearningML System DesignFeature Engineering
15
0
158 people solved
Oct 13, 2025
eBay logo
eBay
Medium
Software Engineer Locked

Implement list and grid transformation tasks

This question evaluates skills in character classification, array and list manipulation, greedy repartitioning logic, and iterative grid simulation wi...

Coding & Algorithms
6
0
69 people solved
Jan 6, 2026
Databricks logo
Databricks
Hard
Data ScientistIntern

Diagnose and fix multicollinearity in income regression

You want to estimate the relationship between gender and income using a regression model, while controlling for other covariates such as: - age - educ...

Statistics & MathRegression & Statistical Modeling
6
0
102 people solved
Oct 14, 2025
OneMain Financial logo
OneMain Financial
Medium
Data Scientist

Transform clickstream with pandas sessionization

Given a pandas DataFrame events with columns [user_id:int, ts:str ISO8601 or NaT, url:str, server_log_ts:datetime], build 30-minute inactivity session...

Data Manipulation (SQL/Python)Pandas & Python DataMemory Management
8
0
89 people solved
Oct 13, 2025
DRW logo
DRW
Easy
Data EngineerIntern Locked

Compute a Year-End Balance with Monthly Card Fees

Compute a 2020 bank account's year-end balance after all transactions and twelve monthly card-fee decisions, applying the waiver only when both paymen...

Coding & Algorithms
4
0
48 people solved
May 22, 2026
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