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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
Snowflake logo
Snowflake
Medium
Software Engineer Locked

Solve Matrix and Array Distance Problems

This question evaluates competency in graph traversal and shortest-path reasoning for grid-based problems as well as array-based distance computation ...

Coding & Algorithms
5
0
60 people solved
May 23, 2026
Akuna Capital logo
Akuna Capital
Medium
Software Engineer

Implement a ring buffer

Implement a fixed-capacity circular buffer (ring buffer) supporting push, pop, peek, isEmpty, isFull, and size in O( 1) time using an array. Define an...

Coding & AlgorithmsData Structure DesignConcurrency
23
0
204 people solved
Sep 6, 2025
Shopify logo
Shopify
Medium
Machine Learning Engineer

Model Product Ranking

You are building a machine learning model for product ranking in an e-commerce marketplace. Given a user, context, and a set of candidate products, ra...

Machine LearningRanking ModelsML System Design
8
0
155 people solved
Apr 1, 2026
Databricks logo
Databricks
Hard
Software Engineer Locked

Design a Cache with Hit Counts

This question evaluates a candidate's competence in system design, data structures, concurrency, and observability by requiring a key-value cache that...

Software Engineering FundamentalsData Structure Design
44
0
380 people solved
Mar 15, 2026
Citadel logo
Citadel
Medium
Data Scientist

Analyze Town Temperatures and Select Predictors for NYC

A pandas DataFrame contains \(N\) daily temperature observations for NYC and \(P\ge5\) town columns. Implement: `python q1_q5(df) -> list q6(df) -> li...

Machine Learning
3
0
28 people solved
Apr 15, 2026
Airbnb logo
Airbnb
Hard
Data Scientist

Estimate impact of global launch without holdout

Causal Lift Plan After a Global Launch Without a Holdout Background A new product feature was launched globally on 2025-05-10, with no control or hold...

Analytics & ExperimentationCausal InferenceLaunch Evaluation
35
0
292 people solved
Oct 13, 2025
Salesforce logo
Salesforce
Medium
Software Engineer

Find the Kth Smallest Value in a Binary Search Tree

Problem Given a binary search tree with distinct integer values, return its kth smallest value, using one-based k. The tree is represented by parallel...

Coding & Algorithms
2
0
29 people solved
Apr 11, 2026
LinkedIn logo
LinkedIn
Easy
Software EngineerSenior+ Locked

Design O(1) Randomized Multiset

This question evaluates data-structure design skills, understanding of hashing and randomization for uniform sampling, handling of duplicate elements,...

Coding & AlgorithmsData Structure DesignArrays & Strings
15
0
146 people solved
Apr 6, 2026
Liftoff logo
Liftoff
Medium
Software Engineer

Find degrees of connection in a LinkedIn graph

You are given an undirected graph representing professional connections: - n people labeled 0..n-1 - a list of undirected edges connections, where (a,...

Coding & Algorithms
6
0
66 people solved
Feb 26, 2026
Capital One logo
Capital One
Easy
Data Scientist

Differentiate fixed and variable costs with examples

Unit Economics: Fixed vs. Variable Costs in a Subscription Streaming Business Task - Define fixed cost vs. variable cost for a subscription streaming ...

Statistics & Math
11
0
107 people solved
Oct 13, 2025
Lead Bank logo
Lead Bank
Medium
Software Engineer Locked

Process Calendar Events with Deletion, Pagination, and Overlap Queries

Practice implementing an in-memory calendar that supports inserts, deletions, stable ordering, zero-based pagination, and half-open interval overlap q...

Coding & Algorithms
2
0
28 people solved
Jul 8, 2026
Imc logo
Imc
Medium
Data ScientistIntern Locked

Managing a Research Project End to End

Explain how you take an ambiguous research question through planning, data validation, execution, review, and a decision-ready handoff with limitation...

Behavioral & Leadership
3
0
26 people solved
Aug 14, 2026
Nuro logo
Nuro
Medium
Software Engineer Locked

Design fast search for AV raw logs

This question evaluates a candidate's ability to design scalable logging and search infrastructure for autonomous-vehicle telemetry, testing skills in...

System DesignSearch & Feed SystemsStorage & Sharding
16
0
239 people solved
Feb 11, 2026
Patreon logo
Patreon
Medium
Software Engineer Locked

Analyze Reports in a Nested Org Chart

Analyze a nested organization chart and classify every employee as an individual contributor or manager. Compute direct and total descendant counts in...

Coding & Algorithms
3
0
37 people solved
May 27, 2026
Axon logo
Axon
Medium
Software Engineer

Answer tough self-awareness and team questions

In a director-level behavioral interview, answer the following questions clearly and professionally: 1. What is something people have misunderstood ab...

Behavioral & LeadershipConflict & Collaboration
25
0
215 people solved
Feb 8, 2026
Datadog logo
Datadog
Medium
Software Engineer

Deep-dive a recent project

Project Deep-Dive (Technical Screen: Behavioral & Leadership) Context You will be asked to walk through a recent project you owned end-to-end. Assume ...

Behavioral & LeadershipProject Deep DiveMetrics & KPIs
20
0
155 people solved
Sep 6, 2025
Roblox logo
Roblox
Medium
Data Scientist

Compute ARPDAU/ARPPU by country

Using only the two tables below, write a single SQL query that returns, for each day and country in the last 7 days inclusive (2025-08-26 through 2025...

Data Manipulation (SQL/Python)
3
0
37 people solved
Oct 13, 2025
Snowflake logo
Snowflake
Medium
Software Engineer

Implement topological sort and tree boundary traversal

You are given two separate coding tasks. Problem A — Order courses with prerequisites You have n courses labeled 0..n-1 and a list of prerequisite pai...

Coding & AlgorithmsGraphsTrees
34
0
600 people solved
Feb 12, 2026
Microsoft logo
Microsoft
Easy
Machine Learning EngineerIntern

Explain Transformers and deploy an LLM safely

Answer the following LLM-focused questions. 1) Transformer basics - What problem does the Transformer architecture solve compared with RNNs? - Explain...

ML System DesignTransformers & AttentionLLM Applications
11
0
152 people solved
Dec 27, 2025
OpenAI logo
OpenAI
Medium
Software Engineer

Parse and build binary data in Python

Using provided interfaces ByteReader(read(n), read_uint32_le, read_string) and ByteWriter(write(b), write_uint32_le, write_string), implement function...

Data Manipulation (SQL/Python)Parsing & Interpreters
24
1
219 people solved
Sep 6, 2025
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