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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
18.6k
Companies
980
Updated
11.12.2026
18.6k Questions 980 Companies11.12.2026
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
Pinterest logo
Pinterest
Medium
Data Scientist

Interpret A/B results for video-pin increase

A/B Test: Increasing Video Pins for New Users Context Pinterest ran an online controlled experiment on new users to increase the share of video pins i...

Analytics & ExperimentationExperiment Analysis & ReadoutHypothesis Testing
22
0
152 people solved
Oct 13, 2025
Aeonea logo
Aeonea
Medium
Software Engineer

Implement a tennis score tracker

Design and implement a tennis game scoring function. Input: a stream of points won by players 'A' or 'B' (e.g., A, B, B, B, B). After each point, outp...

Coding & Algorithms
8
0
98 people solved
Sep 6, 2025
Google logo
Google
Medium
Software Engineer

Find shared objects across two log files

You are given two large log files representing activity on two different days. Each line of each log has three fields: - timestamp: a time value (you ...

Coding & AlgorithmsArrays & StringsBatch & Stream Processing
10
0
146 people solved
Nov 5, 2025
Snapchat logo
Snapchat
Medium
Machine Learning Engineer Locked

Explain core ML fundamentals and tradeoffs

This question evaluates core machine learning fundamentals including bias–variance tradeoffs, overfitting, class imbalance handling, loss function sel...

Machine LearningML FundamentalsNeural Networks & Training
11
0
118 people solved
Jan 10, 2026
ByteDance logo
ByteDance
Medium
Machine Learning Engineer

Explain XGBoost's Overfitting Resistance

A single, unpruned decision tree can recursively partition the training set until its leaves describe individual training points, which makes it a hig...

Machine LearningSupervised LearningML Fundamentals
8
0
137 people solved
Mar 27, 2026
Walmart Labs logo
Walmart Labs
Easy
Software EngineerSenior+

Merge two sorted arrays in-place

You are given two integer arrays sorted in non-decreasing order, and two integers m and n: - nums1 has length m + n. The first m elements of nums1 con...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
13
0
128 people solved
Dec 9, 2025
Microsoft logo
Microsoft
Medium
Software EngineerNew Grad Locked

Build a CSV Query Engine

This question evaluates proficiency in text parsing, data modeling, and implementing in-memory query semantics, including CSV parsing rules, type infe...

Coding & Algorithms
11
0
82 people solved
Jan 31, 2026
Meta logo
Meta
Medium
Software Engineer

Count subarrays summing to target

Given an integer array nums and an integer target T, return the number of contiguous subarrays whose sum equals T. Provide an algorithm that runs in l...

Coding & Algorithms
11
0
105 people solved
Sep 6, 2025
Stripe logo
Stripe
Medium
Data Scientist

Implement streaming per-user reservoir sampling

Design and code (in Python) a streaming algorithm that ingests an unbounded event stream of tuples (user_id, event_time, event_type) and maintains, fo...

Coding & Algorithms
3
0
48 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Data Scientist

Explain Decision-Tree Training and Clustering Algorithms

Explain Decision-Tree Training and Clustering Algorithms Decision Trees and Clustering: Training Mechanics and Core Principles Context Technical/phone...

Machine LearningSupervised LearningUnsupervised Learning
86
0
289 people solved
Aug 4, 2025
Bloomberg logo
Bloomberg
Hard
Software Engineer Locked

Design streaming mention analytics with search and alerts

This question evaluates system-design competencies such as real-time stream ingestion, stateful stream processing and time-windowed aggregation, high-...

System DesignSearch & Feed SystemsBatch & Stream Processing
51
0
450 people solved
Mar 1, 2026
Medium
Software Engineer

Compare String, StringBuilder, and StringBuffer in Java

Compare String with StringBuilder in Java, including mutability and repeated text construction. Also explain where StringBuffer fits and whether these...

Software Engineering FundamentalsProgramming LanguagesConcurrency
0
0
8 people solved
Jan 14, 2026
Google logo
Google
Medium
Data Scientist

Minimize L2, L1, and quantile losses

Given an array X of n real numbers, derive the value θ that minimizes the sum of squared deviations Σ(xi−θ)² (mean) and the sum of absolute deviations...

Coding & Algorithms
16
0
138 people solved
Oct 13, 2025
Coinbase logo
Coinbase
Easy
Data Scientist

Compute probability at least one user uses feature

Problem Assume there are \(n\) users. Each user independently uses a certain feature with probability \(p\). 1) What is the probability that at least ...

Statistics & Math
8
1
78 people solved
Sep 20, 2025
Google logo
Google
Medium
Data EngineerIntern

Write SQL and merge linked lists

The technical interview included two coding-style tasks: a SQL analytics query and merging two sorted linked lists. Constraints & Assumptions - For SQ...

Coding & AlgorithmsSQLLinked Lists
10
1
152 people solved
Mar 9, 2025
Uber logo
Uber
Medium
Software Engineer

Solve BFS and grid tasks

The coding rounds included several algorithmic problems: 1. Threshold search with binary search: You are given floors 1..n and an API canOperate(floor...

Coding & AlgorithmsGraphsBinary Search
17
0
133 people solved
Feb 22, 2026
DoorDash logo
DoorDash
Medium
Data Scientist

Solve multi-part SQL with sliding windows

Assume 'today' is 2025-09-01. You are given the following tables. users(user_id INT PRIMARY KEY, signup_date DATE) orders(order_id INT PRIMARY KEY, us...

Data Manipulation (SQL/Python)
9
0
82 people solved
Oct 13, 2025
Shopify logo
Shopify
Medium
Machine Learning Engineer

Demonstrate Git and build workflow

End-to-End Git and Tooling Workflow (Feature Branch + CI) Context You are given a repository URL and asked to demonstrate a pragmatic, reproducible wo...

Software Engineering FundamentalsCI/CD & DeploymentTesting & Quality
14
0
155 people solved
Aug 12, 2025
Elastic logo
Elastic
Medium
Software Engineer

Implement log aggregation in React

React Coding: Log stream aggregation You are building a small React feature that displays real-time statistics from a log stream. Log event format Eac...

Coding & Algorithms
12
0
93 people solved
Nov 13, 2025
Akuna Capital logo
Akuna Capital
Medium
Software Engineer

Answer SQL MCQs with reasoning

Answer multiple-choice questions covering SQL topics: INNER vs LEFT vs RIGHT JOIN semantics; GROUP BY and HAVING; NULL handling in comparisons and agg...

Data Manipulation (SQL/Python)
9
0
75 people solved
Aug 1, 2025
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