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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
569
Updated
10.02.2026
11.9k Questions 569 Companies10.02.2026
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
NVIDIA logo
NVIDIA
Medium
Software Engineer Locked

How would you optimize large-scale training/inference?

This question evaluates a candidate's skills in ML system design, GPU/CUDA performance engineering, and distributed training and inference optimizatio...

ML System DesignNeural Networks & TrainingMemory Management
11
0
107 people solved
Jan 14, 2026
Coinbase logo
Coinbase
Medium
Data Scientist

Calculate Cumulative Sum for Each Integer in Table

numbers +-----+ | num | +-----+ | 1 | | 2 | | 13 | | 14 | | 15 | +-----+ Scenario You have a table containing one integer per row; for each row...

Data Manipulation (SQL/Python)
14
0
14 people solved
Jul 12, 2025
Thumbtack logo
Thumbtack
Hard
Data Scientist

Define success metrics for Instant Book

Instant Book: Metrics, Measurement, Rollout, and Risk Plan Context You are evaluating an "Instant Book" feature that allows customers to immediately b...

Analytics & Experimentation
4
0
69 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Product Manager

Should Meta build accessible VR?

You are a Product Manager in Meta's New Product Introduction organization for VR hardware. The team is considering an accessibility-focused VR experie...

Product Design & StrategyProduct SenseMetrics & KPIs
3
0
53 people solved
Apr 10, 2024
Amazon logo
Amazon
Easy
Applied Scientist

Compare decision trees and random forests

Compare decision trees and random forests. In your answer, discuss: - How a single decision tree is built and its main advantages and disadvantages. -...

Machine Learning
9
0
86 people solved
Dec 8, 2025
Meta logo
Meta
Medium
Machine Learning Engineer Locked

Design recommendation and weapon-ad detection systems

This question evaluates proficiency in end-to-end ML system design, covering scalable recommendation systems and safety-focused ad classification with...

ML System Design
9
0
91 people solved
Dec 9, 2025
Snapchat logo
Snapchat
Hard
Software Engineer Locked

Explain Swift memory, value semantics, and GCD

This question evaluates a candidate's understanding of Swift memory management, value versus reference semantics, copy-on-write behavior, ARC stack vs...

Software Engineering Fundamentals
4
0
64 people solved
Jan 2, 2026
Meta logo
Meta
Medium
Data Scientist

Describe Handling Unexpected Changes and Data-Driven Conflicts

Describe Handling Unexpected Changes and Data-Driven Conflicts This behavioral interview prompt assesses cultural fit, ownership, communication, adapt...

Behavioral & Leadership
29
0
133 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Software Engineer Locked

Solve counting and frequency coding tasks

This question evaluates algorithmic skills in counting, frequency analysis, constraint-based pair counting, and stream-oriented tokenization and ranki...

Coding & Algorithms
4
0
52 people solved
Jan 5, 2026
Capital One logo
Capital One
Medium
Data Scientist

Evaluate a credit-card acquisition partnership

Cohort NPV and Sensitivity for New Credit-Card Customers Context You are evaluating a co-branded partner expected to deliver 50,000 newly acquired cre...

Analytics & ExperimentationBusiness Case Analysis
18
0
141 people solved
Oct 13, 2025
Adobe logo
Adobe
Medium
Software Engineer

Describe Your Two-to-Three-Year Growth Direction

Question Where do you want your work to develop over the next two to three years? Explain the capabilities, scope, and kinds of problems you want to g...

Behavioral & Leadership
1
0
11 people solved
Apr 19, 2026
TikTok logo
TikTok
Hard
Software Engineer

Define and measure project metrics

Design and Measurement: Metrics, Instrumentation, and Experiment Plan Context (added for clarity) You are shipping "Freshness Boost," a change to the ...

Analytics & Experimentation
5
0
54 people solved
Sep 6, 2025
Capital One logo
Capital One
Medium
Data Scientist

Articulate your most significant achievement

Behavioral Prompt: Most Significant Professional Achievement (Last 3 Years) Context: Technical screen for a Data Scientist role. The interviewer is as...

Behavioral & Leadership
4
0
64 people solved
Oct 13, 2025
Capital One logo
Capital One
Hard
Data Scientist

Present and defend your data challenge end-to-end

10–12 Minute Interviewer-Driven Walkthrough: Recent Data Challenge Provide a concise, structured walkthrough of a real project you led end-to-end. Ass...

Machine Learning
11
0
77 people solved
Oct 13, 2025
TikTok logo
TikTok
Medium
Software Engineer Locked

Solve linked list, string filtering, and puzzle

This multi-part question evaluates proficiency with linked-list pointer manipulation and constant-space linear-time algorithms, pattern-driven string ...

Coding & Algorithms
7
0
50 people solved
Jan 6, 2026
Amazon logo
Amazon
Hard
Data Scientist

Prove new allocation outperforms manual baseline

Prove an Automated Package-Allocation System Outperforms Manual Baseline Context You work in a large last‑mile logistics network evaluating a new auto...

Analytics & Experimentation
6
0
46 people solved
Oct 13, 2025
Lyft logo
Lyft
Easy
Software Engineer

Design a Fault-Tolerant Wikipedia Archiver

Question Design a distributed system that archives all Wikipedia pages and keeps the archive current. You have one reliable primary machine, about one...

System Design
2
0
30 people solved
Apr 14, 2026
TikTok logo
TikTok
Hard
Software Engineer Locked

Find longest substring with ≥k repeats

This question evaluates proficiency with string-processing techniques and character frequency analysis, focusing on algorithmic skills in the Coding &...

Coding & Algorithms
3
0
45 people solved
Jan 9, 2026
Medium
Data Scientist

Design MapReduce and Spark jobs

Big data systems: (a) Explain Hadoop’s fault tolerance (HDFS replication, task re-execution) and why MapReduce includes shuffling and sorting; in a wo...

Data Manipulation (SQL/Python)Batch & Stream Processing
3
0
64 people solved
Oct 13, 2025
Coinbase logo
Coinbase
Medium
Data Scientist

Compute adoption, latency, and cross-region transactions

Invented schema: users(user_id INT PRIMARY KEY, user_region STRING, adopted_at TIMESTAMP NULL) transactions(txn_id INT PRIMARY KEY, user_id INT, txn_t...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
4
0
53 people solved
Oct 13, 2025
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