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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
570
Updated
10.14.2026
12.2k Questions 570 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
Google logo
Google
Hard
Software Engineer Locked

Minimize maximum height along a grid path

This question evaluates algorithmic pathfinding and graph-modeling skills, specifically reasoning about grid-based route selection where the objective...

Coding & AlgorithmsGrids & MatricesGraphs
15
1
102 people solved
Jan 4, 2026
Jerry.Ai logo
Jerry.Ai
Medium
Software Engineer

Determine a one-step string transformation

Given two lowercase strings source and target, determine whether target can be obtained from source using at most one of the following operations, and...

Coding & Algorithms
1
0
31 people solved
Jan 1, 2026
Optiver logo
Optiver
Easy
Software Engineer

Compute permutations with repeated letters

Counting Strings with Repeated Characters Problem Given two nonnegative integers m and n, how many distinct strings can be formed that contain exactly...

Statistics & MathMath & Number Theory
14
1
132 people solved
Aug 13, 2025
Coinbase logo
Coinbase
Medium
Software Engineer

Count users over n connections

Count users over n connections Given a stream of relationship events in the form [[user_a, user_b, op], ...], where op ∈ {"connect", "disconnect"}, tr...

Coding & Algorithms
10
0
78 people solved
Aug 7, 2025
Meta logo
Meta
Medium
Data Engineer

Tackle Python tasks under time pressure

In a 15-minute coding round, implement a small Python function or class to solve a well-scoped problem within about 5 minutes of coding. 1) State 1–2 ...

Data Manipulation (SQL/Python)Testing & QualityCode Quality & Maintainability
23
0
193 people solved
Sep 6, 2025
Oracle logo
Oracle
Medium
Software Engineer Locked

Compress Consecutive Characters with Run Lengths

Implement compress_runs(s) and return the compressed string. Work through the function contract, boundary cases, correctness argument, and time and sp...

Coding & Algorithms
0
0
11 people solved
Jul 26, 2026
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Design a Ticketmaster-like ticketing system

This question evaluates a candidate's competency in designing scalable, consistent online ticketing platforms, testing knowledge of distributed system...

System DesignSystem Design FundamentalsPayments & Ledgers
4
0
88 people solved
Jan 9, 2026
Upstart logo
Upstart
Medium
Data Scientist

Simulate Radioactive Decay to Validate Analytical Solution

Scenario Same radioactive-decay problem, but now validate the analytical answer via simulation during the interview. Question Share screen and write r...

Coding & AlgorithmsProbabilitySampling & Estimation
13
0
127 people solved
Aug 4, 2025
Snapchat logo
Snapchat
Medium
Software Engineer

Compute islands in a binary grid

You are given an m-by-n grid of characters where '1' represents land and '0' represents water. Count the number of connected land masses (islands) usi...

Coding & Algorithms
5
0
80 people solved
Sep 6, 2025
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
xAI logo
xAI
Medium
Software Engineer

How Would You Prevent Hallucinations in an LLM-Based System?

You are interviewing for an AI-focused Software Engineer role at a company building products on top of large language models. During the screen, the i...

Machine Learning
5
0
93 people solved
Nov 21, 2025
Databricks logo
Databricks
Hard
Software Engineer Locked

Implement a Tic-Tac-Toe game API

This question evaluates implementation skills in data structures and algorithmic optimization, focusing on efficient state tracking and constant-time ...

Coding & AlgorithmsSimulation & State MachinesData Structure Design
18
0
127 people solved
Jan 7, 2026
NVIDIA logo
NVIDIA
Medium
Software Engineer

Apply sliding window techniques

Apply sliding window techniques Explain the sliding window technique and apply it to solve: ( 1) Given an array of positive integers and a target S, r...

Coding & AlgorithmsTwo Pointers & Sliding Window
14
0
150 people solved
Aug 7, 2025
Bitkernel logo
Bitkernel
Medium
Software Engineer

Count binary search steps for specific keys

You have the sorted array: [22, 34, 55, 77, 89, 93, 99, 102, 120, 140] Using standard binary search with low and high indices and mid = floor((low + h...

Software Engineering Fundamentals
6
0
43 people solved
Oct 24, 2025
Amazon logo
Amazon
Easy
Data Scientist

Explain core ML concepts and metrics

You are interviewing for a Data Scientist role. Answer the following ML fundamentals questions clearly and concisely. Concepts 1. Explain the bias–var...

Machine LearningML FundamentalsModel Evaluation
12
0
107 people solved
Oct 11, 2025
Chicago Trading Company logo
Chicago Trading Company
Easy
Data Scientist Locked

Determine if tree has path sum

This question evaluates understanding of binary tree data structures and traversal techniques, along with the ability to accumulate and track root-to-...

Coding & Algorithms
4
0
36 people solved
Feb 9, 2026
Cloudflare logo
Cloudflare
Easy
Software Engineer

Describe experience performing code reviews

During the interview, you are asked: > Have you ever done any code reviews? If yes, the interviewer may follow up with questions about how you review ...

Behavioral & Leadership
9
0
68 people solved
Dec 8, 2025
Google logo
Google
Hard
Product Manager

Legacy Payroll System Migration Plan

Product and Program Prompt: Legacy Payroll System Migration Plan You are responsible for migrating a legacy payroll system to a new platform in a larg...

Product / Decision MakingRoadmapping & PlanningData Quality & Validation
20
0
132 people solved
Jul 4, 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
OpenAI logo
OpenAI
Hard
Software Engineer

Design a response-ranking ML system

Design a response-ranking ML system System Design: Ranking Candidate Text Responses to Maximize User Satisfaction You are designing an end-to-end mach...

ML System DesignRanking ModelsModel Evaluation
11
0
114 people solved
Jul 28, 2025
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