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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
Google logo
GoogleAmazonUber

Also asked at Uber, TikTok, Meta, Microsoft, Nutanix, PayPay

Medium
Software Engineer

Connect Planar Points at Minimum Manhattan Cost

Problem Each entry of points is an integer coordinate pair. An edge between two points costs the sum of their horizontal and vertical distances. Selec...

Coding & AlgorithmsGraphsGreedy
1
0
11 people solved
Affirm logo
Affirm
Medium
Data Analyst

Connect Analyst Experience, Delivered Insights, and Your Next Role

Connect Analyst Experience, Delivered Insights, and Your Next Role For an analyst role on a credit-risk team, introduce the recent work most relevant ...

Behavioral & LeadershipMotivation & FitProject Deep Dive
4
0
35 people solved
Sep 23, 2026
Plaid logo
Plaid
Medium
Software Engineer Locked

Reason About Rate Limiting Under Memory and Throughput Pressure

Design an in-memory rate limiter that remains useful when request volume makes per-request queues too costly. Compare exact and approximate policies w...

Software Engineering FundamentalsRate LimitingData Structure Design
30
1
249 people solved
Aug 1, 2026
Amazon logo
Amazon
Medium
Software EngineerIntern Locked

Validate AI-Generated Code Safely

This question evaluates experience with generative AI tools and the competency in validating AI-generated code for correctness, maintainability, and s...

Software Engineering FundamentalsAI-Assisted DevelopmentTesting & Quality
135
1
1141 people solved
May 11, 2026
Google logo
GoogleBloombergMicrosoft

Also asked at Microsoft, Amazon, Meta

Hard
Software Engineer

Count Distinct Nonempty Subsequences of a Lowercase String

Problem Return the number of different nonempty strings obtainable from s by deleting characters while preserving the order of those retained. Equal r...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
1
0
12 people solved
CVS Health logo
CVS Health
Easy
Software EngineerSenior+

Design a Feature-Flag Evaluation System

Implement a system that receives a feature flag and a user and decides whether that feature is enabled for that user. The source does not specify a ru...

Software Engineering FundamentalsCI/CD & DeploymentConsistency & Availability
1
0
14 people solved
Jul 25, 2026
Capital One logo
Capital One
Medium
Software Engineer

Sorted Sums of Absolute Differences Over All Cyclic Shifts of an Array

You are given two integer arrays nums1 and nums2 of the same length n. For each shift t from 0 to n - 1, rotate nums1 cyclically by t positions and ad...

Coding & AlgorithmsArrays & Strings
2
0
29 people solved
Aug 4, 2026
Arista Networks logo
Arista NetworksSquarepointSalesforce
Hard
Software Engineer

Minimize the Longest Equal-Character Substring

Problem You are given a binary string s and an integer numOps. One operation selects an index and flips that bit: 0 becomes 1, or 1 becomes 0. Using a...

Coding & AlgorithmsBinary SearchArrays & Strings
0
0
14 people solved
Databricks logo
Databricks
Medium
Software Engineer

Design IP/CIDR rule matcher

Design and implement a rule matcher that returns 'accept' or 'deny' for a given IPv4 address based on a set of rules. Each rule can be either an inclu...

Coding & AlgorithmsData Structure DesignIntervals & Scheduling
55
0
531 people solved
Sep 6, 2025
Headway logo
Headway
Medium
Software Engineer Locked

Build a Dual Fixed-Window Rate-Limiting Middleware

Design FastAPI middleware that enforces both a global limit of 100 requests per minute and a per-domain limit of 3 requests per second. Make the API o...

Software Engineering Fundamentals
10
0
87 people solved
Jul 25, 2026
Instacart logo
Instacart
Medium
Software Engineer Locked

Explain Technical Tradeoffs in a Project You Led

Discuss a led project through concrete technical alternatives, implementation details, personal ownership, coordination, and supported outcomes.

Behavioral & LeadershipProject Deep DiveLeadership & Influence
5
0
51 people solved
Sep 11, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Filter Open Restaurants Through Existing Domain APIs

Filter restaurants through existing domain APIs so every result is both within the requested city and currently open. Practice reading only the needed...

Software Engineering FundamentalsAPI Integration & HTTP Clients
26
0
210 people solved
Aug 13, 2026
Qualified Health logo
Qualified Health
Hard
Software Engineer

Control LLM Workflow Quotas and Recovery Costs

A distributed DAG workflow system calls external LLM providers for document summarization, embeddings, extraction, and inference. Model tasks may take...

System DesignRate LimitingDistributed Transactions & Idempotency
1
0
16 people solved
Sep 30, 2026
Databricks logo
Databricks
Medium
Software Engineer Locked

Find the Best Commute Mode

This question evaluates competency in grid-based pathfinding, graph traversal, and multi-criteria optimization of path time and cost within the Coding...

Coding & Algorithms
13
0
109 people solved
May 17, 2026
Google logo
Google
Hard
Data Scientist Locked

Evaluate AI Workflow Product Metrics

This question evaluates product analytics and experimentation skills—specifically metric definition, funnel construction, segmentation, instrumentatio...

Analytics & ExperimentationMetric DiagnosticsUser Behavior & Funnels
64
0
608 people solved
May 18, 2026
Salesforce logo
Salesforce
Medium
Software EngineerSenior+

Behavioral deep dive: scaling decisions, zero-to-one platforms, traffic spikes, conflict

This is the hiring manager conversation in a senior backend engineering loop, and it goes deep. The manager spends real time on one system you own, as...

Behavioral & LeadershipProject Deep DiveConflict & Collaboration
3
0
24 people solved
Aug 8, 2026
ByteDance logo
ByteDance
Medium
Applied ScientistNew Grad

Explain GRPO for LLM Reinforcement Learning and How It Differs from PPO

Explain GRPO (Group Relative Policy Optimization), a reinforcement learning algorithm used to fine-tune large language models, for example to improve ...

Machine LearningReinforcement LearningFine-Tuning & Alignment Techniques
1
0
26 people solved
Oct 8, 2026
AMD logo
AMD
Medium
Software Engineer Locked

Explain GPU Register Spills and Their Performance Cost

Explain GPU register spills through live-variable pressure, compiler allocation, spill traffic, occupancy tradeoffs, and measured optimization choices...

Software Engineering FundamentalsGPU Programming
3
0
23 people solved
Sep 14, 2026
Squarepoint logo
Squarepoint
Easy
Software EngineerIntern

Explain Database Indexes and Why Every Column Should Not Be Indexed

Explain what a database index does and why creating an index on every column can make a database perform worse. Use a relational table with frequent i...

Software Engineering FundamentalsIndexing & Query PerformanceDatabase Internals
3
0
57 people solved
Jun 20, 2026
Apple logo
Apple
Medium
Software Engineer

Design Large-Document Uploads and Multi-Device Synchronization

Design a document-sharing service that supports uploading documents, including large files, and synchronizing changes across multiple devices. Clarify...

System DesignFile & Media StorageConsistency & Availability
1
0
14 people solved
Jul 25, 2026
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