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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
Axon logo
Axon
Medium
Software Engineer

Design analytical tracking database

Design analytical tracking database Design an Analytical Database for User Actions Context You are building an analytics data store to track user beha...

System DesignWarehouse & Lakehouse ArchitectureDimensional Modeling
30
0
242 people solved
Aug 4, 2025
Amazon logo
Amazon
Medium
Software Engineer

Behavioral: Resolving a Workplace Conflict and Using Generative AI in Your Work

In the behavioral part of a software engineering onsite, you are asked two questions: one about a conflict you worked through, and one about how you h...

Behavioral & LeadershipConflict & CollaborationAI-Assisted Development
0
0
7 people solved
Mar 11, 2026
TikTok logo
TikTok
Medium
Machine Learning Engineer

Compute longest increasing subsequence

Longest Increasing Subsequence: length, reconstruction, and counting Given an integer array nums, do all of the following: 1. Length. Compute the leng...

Coding & Algorithms
6
0
74 people solved
Sep 6, 2025
Uber logo
Uber
Medium
Data ScientistNew Grad Locked

Predict driver acceptance

This question evaluates a candidate's competency in designing and operationalizing an end-to-end machine learning solution for predicting driver accep...

Machine Learning
6
0
81 people solved
Mar 22, 2026
Meta logo
Meta
Medium
Data Scientist

How do you expand nested placeholders in strings?

You are given a dictionary of string templates. Keys are identifiers like X, Y, Z. A template may contain placeholders of the form %KEY%, which should...

Coding & Algorithms
5
1
48 people solved
Nov 24, 2025
Meta logo
Meta
Medium
Data Scientist

Determine Old vs. New Users' Shop Visibility Changes

SHOP_VISIBILITY_HISTORY +----------+----------------+---------------------+-------------------+---------+ | user_id | user_signup_dt | action_timesta...

Data Manipulation (SQL/Python)
63
0
27 people solved
Jul 12, 2025
Apple logo
Apple
Medium
Data Scientist

Investigate Conversion Drop: Metrics, Analyses, Techniques Explained

Investigating a Conversion Drop After a Feature Release A new feature was released on an e-commerce platform. Shortly after release, overall checkout ...

Analytics & ExperimentationMetric DiagnosticsCausal Inference
33
0
136 people solved
Jul 12, 2025
Google logo
Google
Medium
Software Engineer Locked

Generate all subsets (handle duplicates)

This question evaluates understanding of power-set generation and handling of duplicate elements, measuring competency in combinatorics, enumeration t...

Coding & AlgorithmsBacktracking & Recursion
13
0
105 people solved
Jan 4, 2026
Meta logo
Meta
Hard
Data Scientist

Lead a product deep dive with quantified impact

Behavioral Product Leadership Prompt (Data Scientist) You are interviewing for a Data Scientist role with a strong focus on product analytics, experim...

Behavioral & LeadershipProject Deep DiveMetrics & KPIs
13
0
132 people solved
Oct 13, 2025
Google logo
Google
Hard
Software Engineer Locked

Return top-k subset sums in descending order

This question evaluates proficiency in combinatorial reasoning, algorithmic optimization for large search spaces, and efficient extraction of top-k va...

Coding & AlgorithmsHeaps & Priority Queues
18
1
145 people solved
Jan 7, 2026
Meta logo
Meta
Medium
Data Scientist

Compute SHOP spend share and model performance

You work on ads measurement. Advertisers can drive users to either Facebook Shop ('SHOP') or their own website ('WEBSITE'). After an ad is shown, you ...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
8
0
78 people solved
Aug 21, 2025
Carvana logo
Carvana
Easy
Software Engineer

Design an Attendance Payroll Service

Design the backend service for an employee attendance system. The service should support: - Employees clocking in and clocking out. - Computing each e...

System Design
4
0
51 people solved
Apr 26, 2026
Eightfoldai logo
Eightfoldai
Medium
Software Engineer

Make a Parentheses String Valid

Given a string s containing lowercase English letters and the characters '(' and ')', remove the minimum number of parentheses so that the resulting s...

Coding & AlgorithmsStacks & Queues
10
0
116 people solved
Mar 19, 2026
Roblox logo
Roblox
Hard
Data Scientist

Compute minimum sample size for A/B test

You are implementing a function to compute the minimum total sample size for an A/B test. You are given: - observed: a 1D array of historical/baseline...

Analytics & ExperimentationExperiment Design (A/B Testing)Hypothesis Testing
8
1
121 people solved
Nov 24, 2025
Google logo
Google
Medium
Software Engineer

Solve three coding interview problems

You are given three independent coding questions. 1) Decode an encoded string Given an encoded string s, decode it using the following rule: - Pattern...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices
26
0
299 people solved
Oct 9, 2025
Two Sigma logo
Two Sigma
Hard
Data ScientistIntern

Implement Univariate Linear Regression with Ordinary Least Squares

Implement univariate (simple) linear regression fitted in batch with the ordinary least squares (OLS) closed-form solution. You must implement the for...

Coding & Algorithms
1
0
26 people solved
Nov 15, 2025
Google logo
Google
Medium
Data Scientist

Explain Linear Regression to Non-Technical Stakeholders

Explain Linear Regression to Non-Technical Stakeholders You are explaining core machine-learning concepts to non-technical stakeholders during a proje...

Machine LearningRegression & Statistical ModelingModel Evaluation
23
0
113 people solved
Jul 12, 2025
ByteDance logo
ByteDance
Hard
Backend EngineerIntern Locked

Solve Bracket Matching and Tree Width

This composite question evaluates proficiency with core data structures and algorithmic reasoning, covering string-based bracket validation (sequence ...

Coding & Algorithms
3
0
26 people solved
May 31, 2026
Coinbase logo
Coinbase
Medium
Software Engineer

Discuss your proudest project

Discuss your proudest project Behavioral prompt — Your most impactful project Context You are in a behavioral/leadership interview for a Software Engi...

Behavioral & Leadership
4
0
87 people solved
Aug 8, 2025
Riotgames logo
Riotgames
Easy
Software Engineer Locked

Choose Between For and While Loops

Compare for loops and while loops and explain when each control structure is clearer or safer.

Software Engineering Fundamentals
0
0
10 people solved
Aug 26, 2026
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