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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
Anthropic logo
Anthropic
Hard
Software Engineer

Schedule instructions on a VLIW pipeline

VLIW Instruction Scheduling and Software Pipelining You are given a 4-issue VLIW machine with these functional units and latencies: - 2 ALUs (ALU late...

System Design
44
0
311 people solved
Sep 6, 2025
LinkedIn logo
LinkedIn
Medium
Software Engineer

Count connected land components in a grid

You are given a 2D grid of characters where: - '1' represents land - '0' represents water A group of land cells forms an island if they are connected ...

Coding & AlgorithmsGrids & Matrices
15
0
130 people solved
Nov 21, 2025
Bloomberg logo
BloombergGoogleAmazon

Also asked at Amazon, Meta, Microsoft

Medium
Software Engineer

Sum Index Distances to Every Equal-Valued Occurrence

Problem For each index i in nums, add |i-j| over all other indices j holding the same value. Return these sums in original index order as vector<long ...

Coding & AlgorithmsArrays & Strings
1
0
9 people solved
Netflix logo
Netflix
Easy
Software Engineer

Design a crash-resilient file system

Prompt Design a resilient file system that can recover file contents correctly after a system crash (e.g., power loss / kernel panic). The interviewer...

System DesignOperating Systems
18
0
369 people solved
Dec 16, 2025
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Design Safe Distribution and Activation of Model Weights

Design a release system that distributes large model-weight artifacts to a serving fleet and activates them without exposing partial state. Candidates...

ML System Design
10
0
83 people solved
May 9, 2026
Ramp logo
Ramp
Medium
Software Engineer

Implement a React flag loader with typewriter effect

Scenario You are given a small React + TypeScript project with a Mocha test runner (and an autograder). The task is a practical front-end mini-project...

Software Engineering FundamentalsReact & UI Frameworks
13
0
246 people solved
Oct 26, 2025
Amazon logo
Amazon
Medium
Applied Scientist Locked

Implement Stable Sigmoid, Softmax, and Scaled Dot-Product Attention

Implement numerically stable sigmoid, softmax, and single-head scaled dot-product attention using elementary arithmetic and loops. The discussion cove...

Machine LearningTransformers & AttentionML Coding
13
0
194 people solved
Jul 2, 2026
TikTok logo
TikTok
Hard
Machine Learning Engineer Locked

Answer ML fundamentals and diagnostics questions

This question evaluates proficiency with confusion-matrix metrics (recall and false positive rate), ensemble learning trade-offs, decision-tree split/...

Machine LearningML FundamentalsModel Evaluation
17
0
123 people solved
Jan 22, 2026
Coinbase logo
Coinbase
Medium
Data Scientist

Calculate a Confidence Interval

Suppose an online experiment compares treatment and control on conversion rate. Treatment has x1 conversions out of n1 users, and control has x0 conve...

Statistics & MathHypothesis TestingExperiment Analysis & Readout
16
1
121 people solved
Feb 13, 2026
MongoDB logo
MongoDB
Medium
Software Engineer Locked

Debug a slow concurrent network server under load

This question evaluates debugging and performance-tuning skills for concurrent network servers, focusing on event-loop behavior, I/O multiplexing, blo...

Software Engineering FundamentalsDebuggingOperating Systems
35
0
243 people solved
Jan 22, 2026
Netflix logo
Netflix
Medium
Data Scientist

Write SQL for DAU and first-purchase conversion

Today is 2025-09-01. Using the schema and sample data below, write a single ANSI-SQL query that returns one row per day for the last 7 days (2025-08-2...

Data Manipulation (SQL/Python)SQL
29
0
235 people solved
Oct 13, 2025
Wayfair logo
Wayfair
Medium
Product Manager

Wayfair Shipping Fee Change: Model the Profit Impact of Repricing One Delivery Option

Wayfair ships customer orders using three delivery methods and is thinking about changing the price it charges customers for one of them. As the produ...

Product / Decision MakingBusiness Case AnalysisExperiment Design (A/B Testing)
0
0
7 people solved
Jul 20, 2026
Resolve.Ai logo
Resolve.Ai
Medium
Software Engineer AI Locked

Design a Weighted Log Distributor

This question evaluates distributed systems architecture, load-balancing and traffic-routing competencies, along with fault tolerance, backpressure ha...

System Design
10
0
83 people solved
May 20, 2026
Bloomberg logo
Bloomberg
Medium
Software Engineer

Introduce yourself and explain why Bloomberg

Behavioral questions 1. Self-introduction / resume walkthrough - Give a 1–2 minute overview of your background. - Highlight 1–2 projects you’ve ...

Behavioral & LeadershipMotivation & FitProject Deep Dive
26
0
261 people solved
Jan 6, 2026
Google logo
GoogleMicrosoftBloomberg
Easy
Software Engineer

Greatest Common Divisor of Odd and Even Sums

Problem Given a positive integer n, form two sums: - sumOdd: the sum of the smallest n positive odd integers; - sumEven: the sum of the smallest n pos...

Coding & AlgorithmsMath & Number Theory
0
0
9 people solved
Stripe logo
Stripe
Medium
Software Engineer Locked

Find linked user records by weighted similarity

This question evaluates skills in similarity-based record linkage, weighted field scoring, and graph connectivity analysis within the Coding & Algorit...

Coding & Algorithms
17
0
137 people solved
Jan 6, 2026
LinkedIn logo
LinkedIn
Hard
Software Engineer Locked

Merge and Serialize N-ary Trees

Define explicit N-ary tree merge semantics, implement the contract without mutating inputs, and design a deterministic, validated round-trip format.

Software Engineering Fundamentals
9
0
88 people solved
Sep 1, 2026
Apple logo
Apple
Medium
Data Scientist

Detect sessions and gaps using SQL LEAD

Write a single ANSI-SQL query that (a) assigns per-user session_ids when the gap between consecutive events exceeds 30 minutes, (b) computes session_s...

Data Manipulation (SQL/Python)SQL
42
1
309 people solved
Oct 13, 2025
Amazon logo
AmazonMicrosoftGoogle

Also asked at Google, Bloomberg, Meta

Medium
Software Engineer

Stable Three-Way Partition Around a Pivot

Problem Given nums and a value pivot that occurs in it, return a rearrangement with all entries below the pivot first, all entries equal to it next an...

Coding & AlgorithmsArrays & Strings
0
0
11 people solved
Amazon logo
Amazon
Medium
Machine Learning Engineer

Design an LLM Chatbot: Training Data, Reward Design and Deployment Considerations

Design a chatbot built on a large language model. Walk through the whole lifecycle, and explain three areas in depth: how you would build the training...

ML System DesignFine-Tuning & Alignment TechniquesReinforcement Learning
4
0
40 people solved
Jan 3, 2026
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