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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
Hive.Ai logo
Hive.Ai
Hard
Software EngineerSenior+ Locked

Detect a Reachable Negative Cycle

Detect whether a negative-weight cycle is reachable from a specified vertex in a directed graph. Apply bounded edge-relaxation rounds without performi...

Coding & Algorithms
1
0
13 people solved
May 13, 2026
Lyft logo
Lyft
Medium
Data Scientist

Design experiments for marketplace balance

You propose a new supplier prioritization (ranking) policy intended to increase order completion in a two-sided marketplace with known interference be...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
26
0
182 people solved
Oct 13, 2025
Google logo
Google
Hard
Data Scientist

Boost Google Workspace Chat Usage with Strategic A/B Testing

Boost Google Workspace Chat Usage with Strategic A/B Testing Scenario Google Workspace Chat adoption is low, and leadership asks for a data-driven pla...

Analytics & ExperimentationGrowth & MonetizationMetrics & KPIs
22
0
89 people solved
Aug 4, 2025
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Design a high-scale URL shortener

This question evaluates a candidate's ability to design scalable, high-throughput distributed systems with emphasis on URL mapping, storage and indexi...

System DesignSystem Design FundamentalsCaching
9
0
96 people solved
Feb 12, 2026
Meta logo
Meta
Medium
Software Engineer

Group a tree by vertical columns

Group a tree by vertical columns Given the root of a binary tree, produce a vertical listing of nodes: assign each node an x-coordinate (root at x=0; ...

Coding & Algorithms
2
0
40 people solved
Aug 7, 2025
ByteDance logo
ByteDance
Medium
Software Engineer

Solve interval merging and histogram area

The coding round included two algorithm problems: 1. Merge overlapping intervals: Given a list of closed intervals [[start1, end1], [start2, end2], .....

Coding & Algorithms
6
0
77 people solved
Feb 18, 2026
Meta logo
Meta
Medium
Data Scientist

Compare Instagram and Facebook Stories Using Key Performance Metrics

Compare Instagram and Facebook Stories Using Key Performance Metrics Scenario You are a data scientist tasked with quantitatively comparing the succes...

Analytics & Experimentation
2
0
50 people solved
Aug 4, 2025
Google logo
Google
Hard
Product Manager

Model-Based Engineering Rollout

Product Strategy Prompt: Model-Based Engineering Rollout for Hardware Development You are a Product Manager presenting to a non-expert Google executiv...

Product / Decision Making
13
1
90 people solved
Jul 4, 2025
Microsoft logo
Microsoft
Medium
Machine Learning Engineer Locked

Explain a project deeply

This question evaluates a candidate's ability to communicate technical ownership, system architecture, decision-making, and operational problem-solvin...

Software Engineering Fundamentals
4
0
61 people solved
Feb 23, 2026
Meta logo
Meta
Medium
Data Scientist

Compute fraud probabilities with Bayes and Binomial

Fake-Account Detection with Binomial Sessions and Bayes Updating You are evaluating a rules-based detector for fake accounts on an online platform. Ea...

Statistics & MathProbability
11
2
99 people solved
Oct 13, 2025
WeRide logo
WeRide
Medium
Software Engineer

Explain PhD relevance to software engineering

Behavioral Prompt: PhD to Software Engineering You are interviewing for a Software Engineer role during a technical screen. The interviewer wants to u...

Behavioral & Leadership
6
0
52 people solved
Sep 6, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer

Count friend requests based on age rules

Problem You are given an array ages, where ages[i] is the age of the i-th person. A person of age A will send a friend request to a person of age B if...

Coding & AlgorithmsTwo Pointers & Sliding WindowSorting
16
0
134 people solved
Dec 15, 2025
TikTok logo
TikTok
Easy
Software Engineer Locked

Plan QA testing for a new feature

This question evaluates competency in QA test planning, test strategy and prioritization, cross-functional coordination with development and product, ...

Software Engineering Fundamentals
4
0
54 people solved
Feb 12, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Find max distance between alive tree nodes

Find max distance between alive tree nodes Given a binary tree, define alive nodes. Base case: alive nodes are the leaves. Find the maximum distance (...

Coding & Algorithms
8
0
71 people solved
Jul 28, 2025
Meta logo
Meta
Hard
Data Scientist

Impact of parents joining Facebook on teen engagement

Parental Presence and Teen Engagement on Facebook Facebook's teen audience overlaps increasingly with parents, who may friend their children, comment ...

Analytics & Experimentation
67
1
144 people solved
Jul 12, 2025
PayPal logo
PayPal
Medium
Data Scientist

Explain Challenging Project and Decision-Making Process

Explain Challenging Project and Decision-Making Process Behavioral Deep Dive: Most Challenging Project Context Technical/phone screen for a Data Scien...

Behavioral & Leadership
6
0
70 people solved
Aug 4, 2025
Snowflake logo
Snowflake
Medium
Data ScientistSenior+

Build a cohort dashboard with Streamlit and SQL

You are given three tables and asked to build a minimal Streamlit app that helps a PM explore weekly cohort retention and ARPU by country. Assume SQL ...

Data Manipulation (SQL/Python)
2
0
16 people solved
Oct 13, 2025
Two Sigma logo
Two Sigma
Medium
Data ScientistIntern

Why Is the Sample Mean Approximately Normal for Large Samples?

In statistics we routinely treat the average of a large sample as if it were normally distributed — for example, when building confidence intervals fo...

Machine Learning
5
0
40 people solved
Dec 1, 2024
Meta logo
Meta
Medium
Software Engineer

Traverse binary tree by levels with constraints

Given a binary tree and a predicate P(node), perform a level-by-level traversal that collects, for each level, only the nodes whose values satisfy P. ...

Coding & Algorithms
3
0
46 people solved
Sep 6, 2025
Instacart logo
Instacart
Medium
Data Scientist

Justify Instacart fit and leaving your role

Behavioral HR Screen — Data Scientist Prompt Why Instacart specifically (vs. DoorDash/Uber Eats or your current company)? - Identify 2–3 Instacart pro...

Behavioral & Leadership
6
0
59 people solved
Oct 13, 2025
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