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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
Meta logo
Meta
Medium
Data Scientist

Analyze Oculus App Engagement with SQL Queries

AppUsage +---------+--------+-----------+--------------+------------+ | user_id | app_id | category | minutes_spent| usage_date | +---------+--------...

Data Manipulation (SQL/Python)
63
0
183 people solved
Aug 4, 2025
Uber logo
Uber
Medium
Software Engineer Locked

Implement Minesweeper and Word Search

This multi-part prompt evaluates grid-based algorithmic skills, including randomized board construction with neighbor counting, straight-line pattern ...

Coding & Algorithms
6
0
44 people solved
May 7, 2026
TikTok logo
TikTok
Hard
Data Scientist

Design Real-Time Credit Card Fraud Detection System

Design a Real-Time Credit-Card Fraud Detection System You are designing a real-time fraud detection system for an online payments platform that proces...

Machine LearningML System DesignSupervised Learning
27
0
119 people solved
Jul 12, 2025
Bitkernel logo
Bitkernel
Medium
Software Engineer

Classify concurrency anomaly between two transactions

Two transactions T1 and T2 run concurrently and access the same data item A. Their operations (in order of time) are: 1. T1 reads A = 100. 2. T2 reads...

Software Engineering Fundamentals
2
0
49 people solved
Oct 24, 2025
Google logo
Google
Medium
Software Engineer

Assess behavioral competencies across scenarios

Behavioral Competency Prompts (Software Engineer, HR Screen) Provide specific work situations that demonstrate each competency below. Use concise STAR...

Behavioral & LeadershipEthics & ResponsibilityAmbiguity & Decision Making
9
0
123 people solved
Sep 6, 2025
Ramp logo
Ramp
Medium
Software Engineer

Maximum Profit from Multi-Stock Trading Records

Maximum Profit from Multi-Stock Trading Records You are given a list of stock price records collected from a trading feed. Each record is a triple: - ...

Coding & Algorithms
3
0
42 people solved
Jan 1, 2026
Airtable logo
Airtable
Medium
Software Engineer Locked

Count business days excluding holidays

This question evaluates proficiency in date and calendar arithmetic, handling set-based exclusions (holiday lists), and reasoning about algorithmic ef...

Coding & AlgorithmsMath & Number Theory
30
0
347 people solved
Jan 22, 2026
OneMain Financial logo
OneMain Financial
Medium
Data Scientist

Explain Type I and Type II Errors in Hypothesis Testing

Type I and Type II Errors in Hypothesis Testing You are discussing hypothesis testing in the context of a modeling or experimentation project. Define ...

Statistics & Math
21
0
78 people solved
Jul 12, 2025
OneMain Financial logo
OneMain Financial
Medium
Data Scientist

Handle Missing Values and Outliers in Machine Learning

Handling Missing Values and Outliers in Machine Learning You are building classification and regression models on tabular business data with missing v...

Machine Learning
49
0
80 people solved
Jul 12, 2025
LinkedIn logo
LinkedIn
Medium
Data Scientist

How do you lead and drive impact?

You are interviewing for a senior or tech-lead data scientist role. Prepare to answer the following behavioral prompts with concrete examples from you...

Behavioral & Leadership
4
0
65 people solved
Oct 12, 2025
ByteDance logo
ByteDance
Hard
Software Engineer

Design a Synchronized Live Comment Overlay

Design a Synchronized Live Comment Overlay Design a chat-like comment service whose messages appear as a live overlay synchronized to a video or event...

System Design
1
0
20 people solved
Apr 28, 2026
Grammarly logo
Grammarly
Medium
Software Engineer Locked

Deep-Copy a Linear Linked List

Deep-copy a finite singly linked list represented by nested Python lists. Preserve values and structure while allocating every returned node independe...

Coding & Algorithms
2
0
25 people solved
Jun 19, 2026
Uber logo
Uber
Medium
Software Engineer

Design Stock Price Alerts

Design a stock price alert system that allows users to create alerts for securities and receive notifications when the market price crosses a specifie...

System DesignReal-Time Systems
13
0
237 people solved
Dec 28, 2025
TikTok logo
TikTok
Medium
Software Engineer

Compute pipeline order from dependencies

You are given a set of pipelines and a list of directed dependency pairs (A, B) meaning pipeline A depends on pipeline B and therefore B must run befo...

Coding & Algorithms
9
0
71 people solved
Sep 6, 2025
LinkedIn logo
LinkedIn
Medium
Data Scientist Locked

Find index with positive suffix sums

This question evaluates array manipulation and algorithmic problem-solving skills, focusing on reasoning about cumulative (suffix) sums and time-compl...

Coding & AlgorithmsArrays & Strings
6
1
115 people solved
Feb 19, 2026
Meta logo
Meta
Medium
Software Engineer

Compute binary tree diameter

Compute binary tree diameter Given the root of a binary tree, compute the tree's diameter defined as the maximum number of edges on any path between t...

Coding & Algorithms
7
0
75 people solved
Aug 7, 2025
Microsoft logo
Microsoft
Medium
Data Scientist

Implement rotated array binary search with duplicates

Given an integer array nums that is a non-decreasing array rotated an unknown number of times. Duplicates may exist. Implement a function that returns...

Coding & AlgorithmsBinary Search
9
0
105 people solved
Oct 13, 2025
Google logo
Google
Medium
Data Scientist

Estimate b when features exceed samples

Consider the linear model y = Xb + ε with X ∈ R^{n×(m+1)} including an intercept. a) Derive the OLS estimator b̂ = (XᵀX)^{-1}Xᵀy, stating the rank con...

Machine LearningRegression & Statistical ModelingML Fundamentals
16
0
115 people solved
Oct 13, 2025
Point72 logo
Point72
Medium
Quantitative Researcher

Explain Transformer Encoder and Decoder Behavior

Answer the following Transformer fundamentals questions in a machine learning interview: 1. What are the main differences between a Transformer encode...

Machine Learning
9
0
81 people solved
Mar 6, 2026
Meta logo
Meta
Medium
Software Engineer

Find missing ranges in interval

Given a sorted unique integer array nums and two integers lower and upper defining an inclusive interval [lower, upper], return all missing ranges not...

Coding & Algorithms
3
0
47 people solved
Aug 14, 2025
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