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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.0k
Companies
570
Updated
10.05.2026
12.0k Questions 570 Companies10.05.2026
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
Attentive logo
Attentive
Medium
Software Engineer

Evaluate a Lisp-Style Prefix Expression Language With ADD, MULT and LET Variables

Implement parse(expression), which evaluates an expression in a small Lisp-style language and returns its integer value. Despite its name, the functio...

Software Engineering FundamentalsParsing & InterpretersStacks & Queues
0
0
7 people solved
Sep 24, 2026
Anthropic logo
Anthropic
Hard
Software Engineer

Explain AI Safety and Weigh Advanced AI Benefits and Risks

Explain what AI safety means to you, what can happen when AI is used improperly, and what you consider the largest potential benefits and risks of adv...

Behavioral & LeadershipEthics & ResponsibilityAI Safety & Alignment
2
0
39 people solved
Aug 19, 2026
Stripe logo
Stripe
Hard
Software EngineerSenior+

Design a Feature Flag Service with Percentage Rollouts and Allow/Block Lists

Design a feature flag service, similar in spirit to Amazon's Weblab, for a company that runs many backend services. Engineers create and edit flags in...

System DesignCI/CD & DeploymentCaching
1
0
13 people solved
Aug 30, 2026
Amazon logo
Amazon
Hard
Software Engineer Locked

Maximize Money in K Consecutive Bags

Practice an interval-window problem that asks for the richest run of k consecutive weighted bags on a sparse infinite line.

Coding & Algorithms
15
1
129 people solved
Jun 1, 2026
Google logo
Google
Medium
Software Engineer Locked

Intervals with Exactly X Concurrent Meetings

Given half-open meeting intervals and an integer X, return every maximal half-open time interval during which exactly X meetings are active, restricte...

Coding & AlgorithmsIntervals & SchedulingSorting
18
1
182 people solved
Aug 1, 2026
Jane Street logo
Jane Street
Medium
Software EngineerIntern

Evaluate Expressions with Strictly Positive Integer Intermediate Results

Evaluate a string arithmetic expression whose literals are positive integers and whose binary operators are +, -, *, and /. Return its integer value i...

Coding & AlgorithmsParsing & InterpretersBacktracking & Recursion
1
0
11 people solved
Aug 22, 2026
Qualified Health logo
Qualified Health
Hard
Software Engineer

Stream LLM Output While Committing Reliable DAG Results

A workflow runs an LLM task whose output must appear incrementally in an interactive client. Downstream DAG nodes, however, require the complete struc...

System DesignReal-Time SystemsJob Scheduling & Workflows
0
0
5 people solved
Sep 30, 2026
Clay logo
Clay
Medium
Software Engineer Locked

Design a Usage-Based Credit Tracking System for a SaaS Platform

This question evaluates a candidate's ability to design a distributed metering and billing system that tracks account balances, authorizes consumption...

System DesignPayments & LedgersDistributed Transactions & Idempotency
23
0
160 people solved
Jun 21, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Resolve Disagreement, Use Feedback, and Grow Engineering Judgment

Explain how you handle technical disagreement, respond to constructive feedback, and develop your engineering judgment while working with people who h...

Behavioral & LeadershipConflict & Collaboration
1
0
15 people solved
Sep 5, 2026
Databricks logo
Databricks
Medium
Software EngineerSenior+ Locked

Detect a K-in-a-Row Win on a Rectangular Board

Implement winning_move(board, row, col, k) after a valid move has placed a player's nonzero integer token at (row, col). Work through the function con...

Coding & AlgorithmsGrids & Matrices
13
0
149 people solved
Jul 30, 2026
Amazon logo
Amazon
Medium
Applied ScientistSenior+

From Early NLP Embeddings to Modern LLM Embeddings

From Early NLP Embeddings to Modern LLM Embeddings Explain how natural-language processing moved from sparse lexical representations to learned embedd...

Machine Learning
3
0
54 people solved
Aug 15, 2026
Salesforce logo
Salesforce
Medium
Member of Technical Staff

Explain the Recursion Tree of Merge Sort

Explain the Recursion Tree of Merge Sort After implementing merge sort, explain its recursion tree in detail. Use the array [5, 2, 4, 2, -1] to show t...

Software Engineering Fundamentals
2
0
29 people solved
Aug 31, 2026
Uber logo
Uber
Medium
Software Engineer Locked

Design an Iterative Path Tree and Clarify File Lookup Semantics

Design a component-based tree for unique absolute paths and traverse it with an explicit stack. The discussion covers repeated directory names, long p...

Software Engineering Fundamentals
3
0
35 people solved
Sep 4, 2026
J.P. Morgan logo
J.P. Morgan
Easy
Software Engineer Locked

Design an Auditable Internal AI Chatbot

Design an auditable internal AI chatbot that retrieves only documents each user may access, limits retained context, resists prompt injection, and rec...

System Design
3
0
53 people solved
Aug 1, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design a Fault-Tolerant Online Chess Service

Design a fault-tolerant online chess service with authoritative move ordering, server-managed clocks, reconnects, spectators, and recovery from applic...

System Design
3
0
56 people solved
Aug 10, 2026
Mistral AI logo
Mistral AI
Medium
Software Engineer

Explain Adam, AdamW, and Decoupled Weight Decay

Explain Adam and AdamW. Why is adding an L2 penalty to the loss generally different from decoupled weight decay under Adam? Constraints & Assumptions ...

Machine LearningNeural Networks & TrainingML Fundamentals
2
0
21 people solved
Sep 1, 2026
Jump Trading logo
Jump Trading
Hard
Software Engineer Locked

Design a Compact Columnar File Format

Design a simplified Parquet-like file format and specify write and read operations. Make the API or object boundaries explicit, then cover invariants,...

Software Engineering FundamentalsStorage Formats & Partitioning
8
0
105 people solved
Aug 6, 2026
AMD logo
AMD
Medium
Software Engineer

Optimize the Memory Accesses of a GPU Matrix Transpose

Analyze and improve a GPU matrix-transpose kernel. For a row-major matrix, a naive mapping often makes either reads or writes contiguous across neighb...

Software Engineering FundamentalsMemory ManagementConcurrency
0
0
10 people solved
Sep 14, 2026
Oracle logo
Oracle
Medium
Software Engineer

Count Islands and Return the Largest Island Size

Given a two-dimensional land/water grid, return both the number of islands and the size of the largest island. An island is a maximal group of land ce...

Coding & AlgorithmsGrids & MatricesStacks & Queues
1
0
11 people solved
Sep 11, 2026
Siemens logo
Siemens
Medium
Machine Learning EngineerSenior+

Explain SFT, DPO, PPO, and the Role of KL Regularization

Explain the objectives and practical differences among supervised fine-tuning (SFT), Direct Preference Optimization (DPO), and PPO-based language-mode...

Machine LearningFine-Tuning & Alignment TechniquesReinforcement Learning
2
0
19 people solved
Sep 4, 2026
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