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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
Amazon logo
Amazon
Medium
Data Engineer

Describe past NLP work and collaboration

Scenario In an initial phone screen, the interviewer asks you to introduce yourself, then drills into your resume. Questions (answer using concrete ex...

Behavioral & LeadershipProject Deep DiveAnnotation & Label Quality
19
0
156 people solved
Mar 1, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Kth Largest Perfect Binary Subtree

This question evaluates a candidate's ability to combine tree traversal with structural validation, requiring recognition of perfect binary subtrees a...

Coding & Algorithms
5
0
37 people solved
Jun 19, 2026
Capital One logo
Capital One
Medium
Data ScientistSenior+

Explain Shell Script Line-by-Line for Data Science Workflows

Scenario Technical screening for a Principal Data Scientist: reviewing shell script and Python classes Question Explain, line by line, what the provid...

Coding & Algorithms
61
0
158 people solved
Aug 4, 2025
Clickup logo
Clickup
Medium
Software Engineer

Process document edit events

Implement a line-based document editor. You are given: - an initial document represented as an array of strings, where each string is one line - a lis...

Coding & Algorithms
4
0
90 people solved
Dec 15, 2025
ByteDance logo
ByteDance
Medium
Software Engineer

Merge overlapping closed intervals into a sorted list of disjoint intervals

You are given a list of closed intervals with integer endpoints, in no particular order. Merge every group of intervals that overlap, and return the r...

Coding & AlgorithmsIntervals & Scheduling
0
0
4 people solved
Jul 28, 2026
Google logo
Google
Hard
Software Engineer Locked

Find Dictionary Matches for a Jammed String

This question evaluates string-processing and pattern-matching skills, specifically run-length grouping of consecutive characters and efficient dictio...

Coding & AlgorithmsString AlgorithmsArrays & Strings
15
1
146 people solved
Apr 9, 2026
Quora logo
Quora
Medium
Software Engineer

Count distinct palindromic subsequences

Given a string s consisting of lowercase English letters, compute how many distinct palindromic subsequence strings of lengths 2, 3, and 4 can be form...

Coding & Algorithms
9
0
75 people solved
Mar 19, 2026
ByteDance logo
ByteDance
Medium
Software Engineer

Defend a Project's Schema, Indexes, and Concurrency Model

Defend a Project's Schema, Indexes, and Concurrency Model Choose one data-heavy service you have built and defend its data model under a detailed tech...

Software Engineering Fundamentals
3
0
30 people solved
Apr 26, 2026
Amazon logo
Amazon
Medium
Applied Scientist Locked

LLM Fundamentals: Tokenization Design and KL-Regularized SFT

This question evaluates depth of knowledge in large language model fundamentals, specifically subword tokenization design and KL-regularized supervise...

Machine LearningLLM ApplicationsFine-Tuning & Alignment Techniques
13
0
175 people solved
Jun 18, 2026
Amazon logo
Amazon
Hard
Applied Scientist Locked

Explain NLP/RL concepts used in LLM agents

This question evaluates proficiency in transformer-based NLP, embedding methods, LLM agent architecture and evaluation, retrieval techniques for RAG, ...

Machine LearningAI AgentsRetrieval-Augmented Generation
26
0
242 people solved
Feb 9, 2026
Waymo logo
Waymo
Medium
Machine Learning Engineer

Design Large-Scale Inference Serving

Design a production inference serving system for a machine learning model used by 100 million daily active users. Your answer should cover: traffic as...

ML System DesignMLOps & Model ServingGPU Infrastructure
14
0
134 people solved
Nov 27, 2025
Mintlify logo
Mintlify
Medium
Software EngineerSenior+

Design a Collaborative Editor

Design a Collaborative Editor Design a collaborative editor. Address frontend tokenization and change management, backend streaming updates and sessio...

System Design
1
0
12 people solved
Apr 30, 2026
Applied Intuition logo
Applied Intuition
Medium
Software Engineer Locked

Compress vertices into uniques and indices

This question evaluates a candidate's ability to perform duplicate detection and compression of sequences of fixed-length tuples, exercising skills in...

Coding & Algorithms
3
0
42 people solved
Feb 11, 2026
Apple logo
Apple
Medium
Machine Learning Engineer

Solve stock and banana problems

Solve both coding problems below. 1. Maximum single-transaction stock profit: Given an array prices where prices[i] is the stock price on day i, retur...

Coding & Algorithms
7
0
85 people solved
Dec 17, 2025
Snowflake logo
Snowflake
Hard
Software Engineer Locked

Implement a JSON Parser

This question tests practical knowledge of parsing theory, including lexical analysis and recursive-descent parsing applied to a well-defined grammar....

Coding & Algorithms
2
0
31 people solved
Jun 15, 2026
Airbnb logo
Airbnb
Medium
Software Engineer Locked

Compute board-game score from regions

This question evaluates grid traversal and connected-component identification skills along with region-based aggregation (counting cells and summing c...

Coding & AlgorithmsGrids & Matrices
46
1
559 people solved
Feb 12, 2026
Qube Research & Technologies logo
Qube Research & Technologies
Hard
Software Engineer Locked

Differentiate smart pointers and raw pointers

This question evaluates a candidate's understanding of C++ pointer semantics, ownership models, lifetime management, and memory-safety trade-offs betw...

Software Engineering Fundamentals
6
0
52 people solved
Jan 15, 2026
Rippling logo
Rippling
Hard
Software Engineer Locked

Design several large-scale systems

This prompt evaluates expertise in large-scale system architecture and distributed systems, including competencies in API and storage design, scalabil...

System DesignSystem Design FundamentalsObservability
35
0
244 people solved
Feb 12, 2026
Citadel logo
Citadel
Hard
Software EngineerSenior+ Locked

Design a low-latency trading platform

This question evaluates a candidate's ability to design a low-latency, real-time trading system, covering competencies in distributed systems, streami...

System DesignTrading SystemsFault Tolerance & Failover
29
0
252 people solved
Jan 26, 2026
Pinterest logo
Pinterest
Hard
Data Scientist

Recover causal effect without a control group

Post-hoc Causal Estimation After a Failed A/B Rollout Context An intern accidentally shipped a feature to 100% of eligible users for 5 consecutive day...

Analytics & ExperimentationCausal InferenceExperiment Analysis & Readout
22
0
141 people solved
Oct 13, 2025
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