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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
Software Engineer Locked

Support a Struggling Teammate Without Sacrificing Team Health

You lead a team with an important but challenging delivery. Use a concrete situation, your decisions and trade-offs, how you influenced others, and ev...

Behavioral & LeadershipMentoring & Team GrowthOwnership & Execution
15
0
148 people solved
Aug 6, 2026
Qube Research & Technologies logo
Qube Research & Technologies
Hard
Software Engineer Locked

Explain left-skewed returns and Black–Scholes terms

This question evaluates understanding of quantitative finance and statistical concepts—specifically interpretation of left-skewed return distributions...

Software Engineering Fundamentals
2
0
42 people solved
Jan 15, 2026
Optiver logo
Optiver
Medium
Software Engineer

Count nonnegative buy/sell sequences

You must perform exactly 2n unit trades starting with 0 shares and ending with 0 shares. Each trade is either a buy (+1 share) or a sell (−1 share), a...

Coding & AlgorithmsDynamic ProgrammingMath & Number Theory
26
0
187 people solved
Jul 16, 2025
Apple logo
Apple
Medium
Machine Learning Engineer Locked

Design a CPA system for ad bidding

This question evaluates a candidate's competency in ML system design for online advertising, covering modeling conversion probability and value (e.g.,...

ML System Design
6
0
96 people solved
Mar 1, 2026
Google logo
Google
Medium
Data Scientist

Design A/B Test for Google Maps UI Change

Design A/B Test for Google Maps UI Change A/B Test Design: Moving the Google Maps Search Bar to the Bottom Context Google Maps is considering a UI cha...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
13
0
102 people solved
Aug 4, 2025
Google logo
Google
Hard
Software Engineer

Find longest duplicated substring

You are given a string s consisting of lowercase English letters. A substring of s is any contiguous sequence of characters, i.e., s[i..j) for 0 ≤ i <...

Coding & AlgorithmsString AlgorithmsBinary Search
15
0
204 people solved
Dec 8, 2025
Uber logo
Uber
Medium
Software Engineer Locked

Design Nearby Restaurant Search

This question evaluates competency in large-scale system design for low-latency geospatial search, covering concepts such as geospatial indexing, cand...

System DesignGeo & Delivery SystemsRanking Models
19
0
167 people solved
May 1, 2026
Waymo logo
Waymo
Medium
Machine Learning Engineer

Design Large-Scale Inference Serving

Design a production inference serving system for a machine learning model used by 100 million daily active users. Your answer should cover: traffic as...

ML System DesignMLOps & Model ServingGPU Infrastructure
14
0
135 people solved
Nov 27, 2025
DRW logo
DRW
Medium
Data Scientist

Solve three algorithmic tasks in Python

You are given 120 minutes to implement three independent algorithmic tasks in Python. Each task specifies the required input/output behavior, the cons...

Coding & AlgorithmsDynamic ProgrammingBinary Search
24
0
204 people solved
Jul 28, 2025
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Solve power jumps and graph tour

This pair of problems evaluates algorithmic problem-solving in number representation and combinatorial graph optimization, focusing on competencies in...

Coding & AlgorithmsDynamic ProgrammingGraphs
10
0
93 people solved
Apr 8, 2026
Google logo
Google
Hard
Software Engineer Locked

Find best-matching binary pattern with wildcards

This question evaluates pattern-matching and string-algorithm skills, including handling wildcards and variable-length matches, priority-based rule se...

Coding & AlgorithmsString AlgorithmsDynamic Programming
14
1
164 people solved
Jan 15, 2026
Apple logo
Apple
Medium
Data Scientist

Compute and Rank Store Revenue by Region Using Pandas

Sales +------------+---------+------------+--------+---------+ | date | store_id| product_id | units | revenue | +------------+---------+------...

Data Manipulation (SQL/Python)
3
1
62 people solved
Aug 4, 2025
Robinhood logo
Robinhood
Medium
Backend Engineer Locked

Scale Word-Frequency Processing Beyond One Machine

Design a distributed word-frequency pipeline for inputs too large for one process while preserving exact tokenization and ranking. Cover immutable obj...

System Design
5
0
53 people solved
Jun 13, 2026
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Design a Distributed Rate Limiter

This question evaluates expertise in distributed systems and real-time rate-limiting, covering scalability, low-latency design, concurrency control, c...

System DesignRate LimitingPartitioning & Consistent Hashing
38
0
275 people solved
May 14, 2026
CVS Health logo
CVS Health
Easy
Data Scientist

Calculate CI and Test Correlation Under Normality

Inference on a Mean, Significance of a Correlation, and a Normal Quantile Assume standard parametric conditions (normality as stated). Show formulas, ...

Statistics & MathHypothesis TestingSampling & Estimation
16
0
142 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Software EngineerSenior+ AI

Solve Three Coding Interview Problems

The interview included three coding tasks: 1. Common ancestor in an N-ary tree You are given the root of an N-ary tree and two target nodes. Determ...

Coding & Algorithms
6
0
79 people solved
Feb 2, 2026
Confluent logo
Confluent
Medium
Software Engineer

Rank songs by pairwise user preferences

You are given preference rankings for n users over m songs. Each song is labeled from 0 to m - 1. For each user i (0-indexed), you are given an array ...

Coding & AlgorithmsSorting
35
0
244 people solved
Nov 30, 2025
Google logo
Google
Medium
Software EngineerNew Grad

Track the Running Median of an Integer Stream

Track the Running Median of an Integer Stream Problem Implement runningMedianTwice(values) -> mediansTwice. Process values from left to right. After e...

Coding & Algorithms
4
1
47 people solved
Dec 8, 2025
Rippling logo
Rippling
Medium
Software EngineerIntern Locked

Explain JS event loop and related concepts

This question evaluates understanding of core frontend JavaScript concepts including the event loop and task scheduling, differences in variable scopi...

Software Engineering FundamentalsJavaScript & TypeScriptBrowser Internals
8
0
121 people solved
Nov 20, 2025
Imc logo
Imc
Medium
Data ScientistIntern Locked

Handling Difficult Feedback

Respond constructively when a collaborator expresses an opinion that is difficult to hear.

Behavioral & Leadership
1
0
29 people solved
Aug 14, 2026
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