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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
Meta logo
Meta
Medium
Software Engineer

Answer core Meta behavioral questions

You are in a behavioral interview for a software engineering role. Answer the following questions with concrete examples from your experience (interns...

Behavioral & LeadershipAmbiguity & Decision MakingConflict & Collaboration
17
0
124 people solved
Jan 22, 2026
Meta logo
Meta
Medium
Machine Learning Engineer

Compute nested depth sum and grid distance

Problem A: Weighted sum of integers in a nested list You are given a nested list structure that may contain integers or other nested lists. Define the...

Coding & Algorithms
13
0
91 people solved
Dec 15, 2025
Coinbase logo
Coinbase
Hard
Data Scientist

Solve the 12-coin balance puzzle

The 12-Coin Counterfeit Puzzle (Three Weighings) You are given 12 visually identical coins. Exactly one of them is counterfeit. The counterfeit coin d...

Statistics & MathPuzzles & Brainteasers
24
0
196 people solved
Oct 13, 2025
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Answer suffix maximum-frequency queries

This question evaluates algorithm design skills and array-processing competency for answering repeated queries efficiently, focusing on time and space...

Coding & AlgorithmsArrays & Strings
6
0
116 people solved
Feb 11, 2026
Abnormal Security logo
Abnormal Security
Hard
Software Engineer

Design a scalable photo deduplication service

Design a scalable photo deduplication service System Design: Productionizing Duplicate-Photo Removal at Scale Context Design a production system that ...

System DesignFile & Media StorageBatch & Stream Processing
18
0
207 people solved
Jul 16, 2025
PayPal logo
PayPal
Medium
Software Engineer

Assess HashMap vs ConcurrentHashMap

Assess HashMap vs ConcurrentHashMap Is Java's HashMap thread-safe? Explain why or why not. How does ConcurrentHashMap achieve thread safety and perfor...

Coding & Algorithms
8
0
83 people solved
Aug 7, 2025
Nordstrom logo
Nordstrom
Medium
Software Engineer

Optimize algorithms and validate inputs

Optimize algorithms and validate inputs For a typical medium-difficulty coding task, walk through your approach: enumerate edge cases, justify your in...

Coding & AlgorithmsTesting & Quality
10
0
104 people solved
Jul 17, 2025
Google logo
Google
Hard
Data Scientist Locked

Build and evaluate illegal-video classifier

This question evaluates competency in end-to-end Machine Learning system design, including multimodal modeling (vision, audio, text), data engineering...

Machine LearningML System DesignAI Safety & Alignment
14
0
104 people solved
Oct 13, 2025
Affirm logo
Affirm
Medium
Software Engineer Locked

Describe a Mentoring Experience and Its Outcome

Describe a sustained mentoring relationship that helped another engineer become more independent. Explain how you diagnosed their needs, adapted an in...

Behavioral & Leadership
6
0
54 people solved
Jul 6, 2026
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Implement Memory Allocation and In-Memory Records

This question evaluates implementation skills in memory management and in-memory data modeling, covering first-fit allocation semantics, free/merge be...

Coding & Algorithms
2
0
36 people solved
May 7, 2026
Reddit logo
Reddit
Medium
Machine Learning Engineer Locked

Analyze CTR Data and Train Model

This question evaluates end-to-end supervised machine learning competencies for tabular click-through rate prediction, including exploratory data anal...

Machine LearningSupervised LearningCTR Prediction & Ads ML
10
0
140 people solved
Feb 1, 2026
Microsoft logo
Microsoft
Medium
Data Scientist

Query email logs for deliverability insights

Using the schema and sample data below, write SQL to answer parts a–c. Assume timestamps are UTC. Today is 2025-09-01. Schema: - Emails(sent_id INT, m...

Data Manipulation (SQL/Python)
5
0
51 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Hard
Software EngineerSenior+

Design review system with voting and rewards

Design a Scalable Product Review System with Voting and Rewards You are designing a reviews feature for a large e-commerce marketplace. Customers can ...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
38
0
395 people solved
Sep 6, 2025
Scale AI logo
Scale AI
Medium
Software Engineer

Quantify impact of your projects using STAR

Interview-style behavioral prompt: "Pick one or two of your impactful projects and walk me through them in detail. Focus on what you did and how you m...

Behavioral & LeadershipProject Deep Dive
27
0
246 people solved
Dec 8, 2025
Netflix logo
Netflix
Hard
Software Engineer

Design viewport dedup for Netflix home page

Design viewport dedup for Netflix home page Design the Above-the-Fold Deduplicated Home Page Rendering Context You are designing the initial viewport ...

System DesignSearch & Feed SystemsPersonalization
40
0
396 people solved
Aug 1, 2025
Amazon logo
Amazon
Hard
Software Engineer

Design a keyboard and mouse input system

Question Design an input processing system that captures keyboard and mouse events and can reliably reconstruct what the user typed (answering "what d...

System DesignSystem Design FundamentalsArrays & Strings
11
0
110 people solved
Sep 6, 2025
Medium
Data Scientist

Write mini-batch gradient descent

Implement a generic mini-batch gradient descent routine: inputs are differentiable loss L(θ; x), initial θ0, batch size b, steps T, and learning-rate ...

Coding & Algorithms
6
0
61 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Software Engineer

Prepare answers for core behavioral questions

Behavioral Questions Set You are preparing for a behavioral interview. Be ready to answer the following questions clearly and concretely, ideally usin...

Behavioral & Leadership
8
0
74 people solved
Dec 7, 2025
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Solve Three Coding Interview Problems

This set of problems evaluates competency in algorithmic problem-solving, including merging sorted arrays with duplicate elimination, reasoning about ...

Coding & Algorithms
3
0
67 people solved
Feb 7, 2026
Affirm logo
Affirm
Medium
Software Engineer

Implement and debug event filtering in Python

You are given a list of event dictionaries with keys: id (str), type (str), ts (int, seconds since epoch), payload (dict). Implement filter_events(eve...

Data Manipulation (SQL/Python)
4
0
59 people solved
Jul 15, 2025
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