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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 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
Uber logo
Uber
Medium
Software EngineerSenior+ Locked

Implement Store Autocomplete

This question evaluates string matching, prefix search, and data structure selection skills by requiring an autocomplete method that returns entries b...

Coding & Algorithms
3
0
26 people solved
May 5, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Track the First Unique Restaurant in a Stream

Track integer restaurant IDs in arrival order and answer each query with the earliest value seen exactly once so far, or -1 when no unique value remai...

Coding & Algorithms
4
1
30 people solved
May 26, 2026
J.P. Morgan logo
J.P. Morgan
Medium
Software Engineer Locked

Review concurrent code quality

This question evaluates skills in concurrent programming, code review judgment, and software design by focusing on misuse of volatile, thread-safety w...

Software Engineering FundamentalsCode Quality & MaintainabilityConcurrency
4
0
82 people solved
Jan 29, 2026
Google logo
Google
Hard
Software Engineer

Design distributed log storage service

Design a Distributed Append-Only Log Storage System You are asked to design the storage layer of a distributed, partitioned, replicated append-only lo...

System DesignDatabase InternalsConsensus & Replication
18
0
143 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Software EngineerIntern Locked

Replace Delimited Tokens in a String

This question evaluates string parsing, token recognition, and dictionary lookup competencies for robust text replacement, including handling malforme...

Coding & Algorithms
4
0
35 people solved
May 28, 2026
LinkedIn logo
LinkedIn
Medium
Software Engineer

Explain a past project and critique a prior team

Interview prompts 1. Project deep dive: Pick a past project you worked on and walk through it end-to-end. Be ready to use a whiteboard to explain arch...

Behavioral & LeadershipProject Deep DiveCode Quality & Maintainability
15
0
160 people solved
Oct 20, 2025
OneMain Financial logo
OneMain Financial
Medium
Data Scientist

Determine Optimal Marketing Budget Allocation for Maximum Profit

Determine Optimal Marketing Budget Allocation for Maximum Profit Budget Allocation Across Acquisition Channels Context You are given an Excel sheet wi...

Analytics & Experimentation
94
0
285 people solved
Aug 4, 2025
Figma logo
Figma
Medium
Data Scientist Locked

Handle Cross-Functional Pushback on an Analysis

Practice answering a data science behavioral question about cross-functional pushback on an analysis, metric, or recommendation. Demonstrate how you u...

Behavioral & Leadership
4
0
52 people solved
Jul 14, 2026
Amazon logo
Amazon
Medium
Software Engineer

Solve jumps and anagram-similarity problems

You are given two independent tasks. Task A (Maximize calories over jumps): - There are n blocks with integer heights height[i] ≥ 0. - You start on th...

Coding & Algorithms
5
0
54 people solved
Sep 6, 2025
Pinduoduo logo
Pinduoduo
Medium
Software Engineer Locked

Implement a Followable Microblog Timeline

Implement an in-memory microblog with posting, following, unfollowing, and a newest-first timeline capped at ten visible tweets. Respect current follo...

Coding & Algorithms
3
0
43 people solved
Jul 26, 2026
Robinhood logo
Robinhood
Medium
Data Scientist

Design Real-Time Analytics Pipeline with Kafka and Flink

Design Real-Time Analytics Pipeline with Kafka and Flink Real-Time Clickstream Analytics Pipeline with Kafka and Flink Scenario You need to design a r...

Behavioral & LeadershipBatch & Stream ProcessingMessaging & Event-Driven
14
0
142 people solved
Aug 4, 2025
Capital One logo
Capital One
Medium
Data Scientist

Determine Country with Most 'Sunny' Days

Weather +------------+------------+---------+ | country | date | weather | +------------+------------+---------+ | Spain | 2023-07-01 | ...

Data Manipulation (SQL/Python)
56
0
209 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Software Engineer

Explain ACID and isolation levels

Explain what a database transaction is, define the ACID properties (Atomicity, Consistency, Isolation, Durability), and describe common transaction is...

Software Engineering FundamentalsTransactions & Isolation
9
0
92 people solved
Dec 8, 2025
Google logo
Google
Hard
Software Engineer

Design line-preserving file chunker pipeline

System Design: Pack Text Lines into Exact 100 MB Output Files Design a data pipeline that reads many text files of varying sizes and emits output file...

System DesignETL & Data PipelinesBatch & Stream Processing
8
0
137 people solved
Sep 6, 2025
Capital One logo
Capital One
Medium
Data Scientist

Build and evaluate airline delay prediction model

You are given several CSVs for the classic airline delay challenge with columns like flight_date, carrier, flight_num, origin, dest, sched_dep, sched_...

Machine LearningModel EvaluationFeature Engineering
15
0
135 people solved
Oct 13, 2025
Voleon logo
Voleon
Medium
Data Scientist

Describe Your Machine Learning Project Experience

Describe Your Machine Learning Project Experience Machine Learning Experience: Walk Through a Project Context You are interviewing for a Data Scientis...

Machine LearningProject Deep DiveML Fundamentals
22
0
156 people solved
Aug 4, 2025
Robinhood logo
Robinhood
Medium
Data Scientist

List Transactions During Active 'Gold' Membership Period

customer_profile +-------------+----------------+--------------------+-------------------+ | customer_id | membership_type| membership_start_date| mem...

Data Manipulation (SQL/Python)
73
0
211 people solved
Aug 4, 2025
Salesforce logo
Salesforce
Medium
Software Engineer

Convert integer to NAF form

Question Convert a given integer into its Non-Adjacent Form (NAF) representation such that no two non-zero digits are adjacent, and prove that the res...

Coding & Algorithms
5
0
45 people solved
Aug 4, 2025
Optiver logo
Optiver
Medium
Software Engineer

Compute negative-price probability after n steps

Random-Walk Price Crossing Probability Setup - Initial price: S₀ = s (real number). - Step size: x > 0. - Number of days: n (integer ≥ 0). - Each day ...

Statistics & MathProbability
7
0
106 people solved
Aug 13, 2025
Netflix logo
Netflix
Medium
Software EngineerSenior+

Explain your memo, culture fit, and level justification

Behavioral Memo Walkthrough (Netflix HR Screen — Software Engineer) You are in the recruiter/HR screen for a Software Engineer role at Netflix that yo...

Behavioral & LeadershipProject Deep DiveCommunication & Stakeholders
25
0
212 people solved
Sep 6, 2025
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