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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.0k
Companies
570
Updated
10.05.2026
12.0k Questions 570 Companies10.05.2026
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
Hard
Data Scientist

Design causal study for reminder impact

Observational Causal Study: Reminder Program With Staggered Market × Channel Launch Context You are evaluating the causal impact of medication-subscri...

Analytics & Experimentation
7
0
67 people solved
Oct 13, 2025
NVIDIA logo
NVIDIA
Medium
Software Engineer

Parse a deeply nested JSON

Parse a deeply nested JSON Given a JSON document with approximately five levels of nesting, write code to traverse it and extract specified fields whi...

Data Manipulation (SQL/Python)Parsing & Interpreters
6
0
101 people solved
Aug 7, 2025
PayPal logo
PayPal
Medium
Data Scientist

Design and Analyze A/B Test for Cashback Program

Design and Analyze A/B Test for Cashback Program A/B Test Design: Checkout Cashback Program (PayPal) Scenario PayPal plans to launch a checkout cashba...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
5
0
93 people solved
Aug 4, 2025
Oracle logo
Oracle
Easy
Software Engineer Locked

Respond to a Material Scope Change Mid-Project

Describe a mid-project scope change by separating reusable work from obsolete assumptions and presenting revised options. The answer covers re-estimat...

Behavioral & Leadership
0
0
9 people solved
May 24, 2026
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Explain Python, Java, and Memory Management

This question evaluates understanding of programming language concepts and runtime behavior—covering typing disciplines, runtime models, performance a...

Software Engineering Fundamentals
5
0
43 people solved
Feb 22, 2026
Meta logo
Meta
Medium
Data Scientist

Design pre-launch plan and cluster A/B test

A Facebook feature ('More like this' button that surfaces similar products) is being considered for Instagram, but it has not launched on Instagram. Y...

Analytics & Experimentation
4
0
55 people solved
Oct 13, 2025
Fidelity logo
Fidelity
Medium
Software Engineer

Compare Spring and Spring Boot

Compare Spring and Spring Boot What are the differences between Spring Framework and Spring Boot? Compare configuration approaches, auto-configuration...

Coding & Algorithms
6
0
69 people solved
Jul 31, 2025
Capital One logo
Capital One
Medium
Data Scientist

Compute energy needed for 10% ROI

A proposed plant must deliver at least a 10% annual ROI on an initial investment of $400M. Annual economics (assume all numbers are annual unless note...

Statistics & Math
6
0
58 people solved
Oct 13, 2025
xAI logo
xAI
Medium
Software Engineer

Token Bucket Rate Limiter with Lazy Refill Backed by a Cache

Token Bucket Rate Limiter with Lazy Refill Backed by a Cache You are building the enforcement layer of a rate limiter. Every user has a token bucket s...

Coding & Algorithms
4
1
40 people solved
Sep 23, 2025
Netflix logo
Netflix
Medium
Data ScientistIntern

Compute ITT, TOT, and LATE with noncompliance

In the same personalization experiment, not everyone assigned to treatment actually receives personalization (noncompliance). You are given user-level...

Analytics & ExperimentationCausal Inference
25
0
188 people solved
Mar 5, 2026
Uber logo
Uber
Medium
Software Engineer Locked

Group strings that are anagrams

This question evaluates string-processing and data-structuring competency, focusing on identifying and grouping anagrams through comparison of unorder...

Coding & AlgorithmsArrays & Strings
14
0
209 people solved
Mar 1, 2026
Meta logo
Meta
Medium
Data Scientist Locked

Write SQL for CTR and Revenue

This question evaluates proficiency in SQL-based data manipulation and analytics, focusing on joins across event and reference tables, time-of-day buc...

Data Manipulation (SQL/Python)SQL
14
1
94 people solved
Mar 12, 2026
NewsBreak logo
NewsBreak
Medium
Machine Learning Engineer

Derive and implement calibration via temperature scaling

Derive and implement calibration via temperature scaling Temperature Scaling for Softmax Calibration Context You have a trained multi-class classifier...

Machine Learning
4
0
74 people solved
Aug 9, 2025
LinkedIn logo
LinkedIn
Medium
Software Engineer

Reverse a linked list

Question LeetCode 206. Reverse Linked List — Given the head of a singly linked list, reverse the list and return the reversed list. https://leetcode.c...

Coding & Algorithms
6
0
37 people solved
Jul 29, 2025
Lyft logo
Lyft
Medium
Data Scientist

Investigate Causes of Driver WOW Score Drop

Investigate Causes of Driver WOW Score Drop Investigating a 10% QoQ Drop in Driver WOW (Satisfaction) Context Assume WOW is a standardized driver sati...

Analytics & ExperimentationMetric DiagnosticsExperiment Design (A/B Testing)
36
0
126 people solved
Aug 4, 2025
Plymouth Rock Assurance Corporation logo
Plymouth Rock Assurance Corporation
Medium
Data ScientistIntern

Compute Fibonacci Numbers

Write a function that returns the nth Fibonacci number. Definitions and requirements: - Use zero-based indexing: fib(0) = 0, fib(1) = 1. - For n >= 2,...

Coding & Algorithms
1
0
32 people solved
Jan 3, 2026
Meta logo
Meta
Medium
Software Engineer

Implement string dedup and mirror tree traversal

- String cleanup with group deletions (LeetCode-inspired): Given a string s consisting of lowercase letters, repeatedly delete any maximal contiguous ...

Coding & Algorithms
2
0
37 people solved
Sep 6, 2025
Uber logo
Uber
Hard
Data Scientist

Apply instrumental variables under interference

IV estimation for a ride‑sharing feature when A/B testing is infeasible due to interference Context You need to estimate the causal effect of a new ri...

Statistics & MathCausal InferenceRegression & Statistical Modeling
11
0
111 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Software Engineer

Find first unique character

Find first unique character Given a lowercase/uppercase alphanumeric string s, return the index of the first character that appears exactly once; if n...

Coding & Algorithms
5
0
47 people solved
Jul 15, 2025
Amazon logo
Amazon
Medium
Software Engineer

Describe deadline pressure, challenges, and decision changes

Describe deadline pressure, challenges, and decision changes Behavioral and Leadership Prompts — Software Engineer (Technical Screen) Answer the follo...

Behavioral & Leadership
4
0
46 people solved
Jul 26, 2025
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