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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
OpenAI logo
OpenAI
Medium
Software Engineer

Design in-memory database API

Design an In-Memory Database: Insert, Query, and Indexing Design and implement a minimal, single-process, in-memory database intended to be embedded i...

System DesignDatabase InternalsIndexing & Query Performance
67
0
795 people solved
Jul 29, 2025
Google logo
Google
Hard
Software Engineer

Design distributed message queue service

Design a Distributed Message Queue Service Problem Statement Design a distributed message queue system that supports very high throughput for both pro...

System DesignMessaging & Event-DrivenConsensus & Replication
43
0
333 people solved
Sep 6, 2025
Google logo
Google
Medium
Software EngineerSenior+ Locked

Design a global real-time notification system

This question evaluates competency in designing large-scale distributed systems for global real-time notifications, covering scalability, multi-region...

System DesignReal-Time SystemsMessaging & Event-Driven
24
0
258 people solved
Jan 12, 2026
Two Sigma logo
Two Sigma
Medium
Software Engineer

Implement a Hash Map with Separate Chaining and Resizing

Implement a hash map data structure from scratch, without using any built-in hash table types from your language's standard library (no dict, HashMap,...

Coding & Algorithms
9
0
79 people solved
Aug 26, 2025
Anthropic logo
Anthropic
Medium
Software Engineer

Explain Anthropic motivation and leadership stories

Anthropic's non-technical loop for Software Engineers spans two distinct sessions: a Culture / values interview and a Hiring-Manager (HM) round that r...

Behavioral & LeadershipMotivation & FitProject Deep Dive
33
0
499 people solved
Feb 28, 2026
Lead Bank logo
Lead Bank
Medium
Software Engineer

Implement Stock Price Query APIs

You are given an initial collection of stock price records. Each record contains: - symbol: a stock name or ticker string - timestamp: initially a cal...

Coding & Algorithms
2
0
41 people solved
Apr 1, 2026
Vanta logo
Vanta
Medium
Software Engineer

Implement a uniq-like function

Implement a function similar to the Unix uniq utility. You are given a sequence of strings representing lines of text in the order they appear in a fi...

Coding & AlgorithmsTwo Pointers & Sliding Window
52
1
352 people solved
Feb 23, 2026
Intuit logo
Intuit
Medium
Data Scientist

Compute Cohort Retention Rate

You are given two tables: - users(user_id BIGINT, signup_ts TIMESTAMP) — one row per user. - user_activity(user_id BIGINT, activity_ts TIMESTAMP, even...

Data Manipulation (SQL/Python)SQLSegmentation & Cohort Analysis
15
0
108 people solved
Feb 10, 2026
Amazon logo
Amazon
Easy
Data ScientistSenior+

Design and evaluate a RAG system

You are interviewing for an L5 Data Scientist role focused on LLM applications. Design a retrieval-augmented generation (RAG) system for an internal q...

Machine LearningRetrieval-Augmented GenerationEmbeddings & Vector Search
24
0
181 people solved
Jan 12, 2026
Optiver logo
Optiver
Hard
Software Engineer Locked

Find the Probability That the Three Smallest Dice Sum to Three

Roll four independent fair six-sided dice. Explain the assumptions and derivation clearly, check edge cases, and show how the result changes when thos...

Statistics & Math
6
0
62 people solved
May 24, 2026
Amazon logo
Amazon
Easy
Software Engineer Locked

Find the Single Value in a Sorted Array of Pairs

Find the only unpaired value in a sorted array where every other distinct number appears exactly twice. The problem measures binary-search invariants,...

Coding & Algorithms
3
0
35 people solved
Jun 22, 2026
Millennium logo
Millennium
Medium
Software Engineer Locked

Design a data structure to store anagrams

This question evaluates proficiency in data structures and algorithms for string grouping and lookup, testing skills in string manipulation, canonical...

Coding & AlgorithmsData Structure DesignArrays & Strings
15
0
167 people solved
Feb 12, 2026
Bilt Rewards logo
Bilt Rewards
Medium
Software Engineer

Debug and Fix Failing Unit Tests in Java

You receive a small Java project for a credit-card rewards service with three failing unit tests: calculatesTriplePointsForRestaurants, returnsUnknown...

Coding & Algorithms
11
0
135 people solved
Sep 6, 2025
Nuro logo
Nuro
Hard
Software EngineerIntern

Check Vertical Reflection Symmetry with Duplicate Points

Determine whether a multiset of two-dimensional points is symmetric about some vertical line. Every occurrence of a point must have a reflected occurr...

Coding & AlgorithmsArrays & Strings
5
0
35 people solved
Feb 15, 2026
Whatnot logo
Whatnot
Medium
Machine Learning Engineer

Design trending livestream discovery

Design a system for a live-commerce platform that surfaces trending livestreams to users. Assume an ML model for scoring trendiness or relevance alrea...

ML System DesignRecommendation SystemsReal-Time Systems
10
0
162 people solved
Jan 17, 2026
Oracle logo
Oracle
Medium
Backend EngineerSenior+ Locked

Return the K Most Frequent Values with a Larger-Value Tie-Break

Return the k most frequent distinct integers ordered by descending frequency, with larger values ranked first whenever frequencies tie.

Coding & Algorithms
1
0
14 people solved
Aug 10, 2026
Microsoft logo
Microsoft
Medium
Machine Learning EngineerIntern

Explain metrics, regularization, and ablation studies

You are interviewing for an Applied Scientist role. 1) For a binary classification problem, explain the following and when you would use each: - Preci...

Machine LearningModel EvaluationML Fundamentals
16
1
171 people solved
Feb 9, 2026
Upstart logo
Upstart
Easy
Software Engineer Locked

Rewrite Sentence-Ending Punctuation

Transform punctuation so every original run of exclamation marks gains one mark and every original period becomes exactly one exclamation mark. A sing...

Coding & Algorithms
4
0
31 people solved
Jul 5, 2026
Google logo
Google
Medium
Software EngineerIntern

Answer project deep-dive and Why Google questions

Scenario This round is conversational (no coding). The interviewer asks about: - One or more personal projects (deep dive) - Internship experience and...

Behavioral & LeadershipProject Deep DiveMotivation & Fit
19
0
157 people solved
Jan 6, 2026
Datadog logo
Datadog
Medium
Software Engineer

Design log queries and a buffered writer

Part A — Log store with time-range queries: Implement a data structure that ingests log entries with ISO-8601 timestamps (e.g., YYYY-MM-DD HH:MM:SS) a...

Coding & AlgorithmsData Structure Design
67
0
454 people solved
Sep 6, 2025
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