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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
Headlands logo
Headlands
Medium
Data Scientist

C++ Sliding-Window Mean of a Float Array With Inf, -Inf and NaN Handling

In C++, given an array arr of float values and a fixed window size k, compute the mean of every contiguous window of length k. The input may contain i...

Software Engineering FundamentalsTwo Pointers & Sliding WindowProgramming Languages
1
0
15 people solved
Aug 30, 2026
IBM logo
IBM
Medium
Software Engineer

Find minimum subarray length with k distinct integers

Given an integer array arr and an integer k, find the minimum length of a contiguous subarray that contains exactly k distinct integer values. Return ...

Coding & AlgorithmsTwo Pointers & Sliding Window
30
0
308 people solved
Jan 31, 2026
UiPath logo
UiPath
Medium
Machine Learning Engineer

Reliable LLM tool calling: format control, failure recovery, and runaway loops

You are building an LLM agent that uses tools: functions or APIs the model can invoke while working on a task. Answer the following questions about to...

Machine LearningAI AgentsLLM Applications
0
0
11 people solved
Sep 9, 2026
Datadog logo
Datadog
Medium
Software Engineer Locked

Design an LLM Agent System That Automatically Resolves Jira Tickets and Opens Pull Requests

This ML system design question evaluates the ability to architect an autonomous LLM-agent pipeline spanning retrieval-augmented generation, tool integ...

ML System DesignAI AgentsRetrieval-Augmented Generation
58
0
387 people solved
Jun 4, 2026
TikTok logo
TikTok
Medium
Software Engineer Locked

Find the Longest Substring with at Most Two Distinct Characters

Find the longest contiguous substring containing at most two distinct characters. This portable version of the standard referenced problem defines emp...

Coding & Algorithms
4
0
70 people solved
Aug 29, 2026
Waymo logo
Waymo
Medium
Software Engineer

Design an Object Storage Service With Buckets, Keys and Durable Blob Storage

Design an object storage service. Clients create named buckets and, inside a bucket, store, read, list and delete objects: opaque blobs of bytes addre...

System DesignFile & Media StorageStorage & Sharding
1
0
15 people solved
Sep 10, 2026
Meta logo
Meta
Medium
Software Engineer

Canonicalize an Absolute Unix-Style Path With Dot and Double-Dot Segments

Given an absolute path in a Unix-style file system, return its simplified canonical form. Function Signature `python def simplify_path(path: str) -> s...

Coding & AlgorithmsStacks & QueuesArrays & Strings
1
0
17 people solved
Sep 14, 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
LinkedIn logo
LinkedIn
Easy
Software Engineer

Answer Repeated Shortest Word Distance Queries

Answer Repeated Shortest Word Distance Queries You are given a fixed array words and many queries. Each query contains two distinct words that both ap...

Coding & Algorithms
6
0
72 people solved
Aug 19, 2026
Amazon logo
Amazon
Medium
Software Engineer

Explain Decoder-Only LLM Architecture and How vLLM Serves It Efficiently

This question comes from an AI-infrastructure-focused software engineering loop in which both the machine learning round and the system design round c...

Machine LearningLLM Inference & ServingTransformers & Attention
2
0
16 people solved
Sep 5, 2026
Google logo
Google
Medium
Software EngineerSenior+ Locked

Compute a Depth-Weighted Sum of a Nested List

Compute the depth-weighted sum of integers in an unevenly nested list. Compare recursive and iterative traversals while handling empty lists, negative...

Coding & AlgorithmsParsing & InterpretersMath & Number Theory
48
4
585 people solved
Aug 6, 2026
Reddit logo
Reddit
Medium
Machine Learning Engineer

Design a Comment-Likelihood Prediction System with a Focus on Feature and Model Serving

Design the machine-learning system behind comment likelihood on a large discussion platform where posts belong to communities: given a user and a post...

ML System DesignML Data Pipelines & Feature StoresMLOps & Model Serving
1
0
17 people solved
Sep 7, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design First-Fit and Best-Fit Memory Allocation

Design a contiguous-region heap allocator that supports two placement policies, block splitting, freeing, and adjacent-block coalescing. Explain metad...

Software Engineering FundamentalsMemory ManagementTesting & Quality
123
2
830 people solved
Jul 27, 2026
Anthropic logo
Anthropic
Medium
Software Engineer Locked

A Conflict About Values

Prepare a behavioral answer about a genuine values conflict, balancing legitimate goals through evidence, accountable escalation, commitment, and dura...

Behavioral & Leadership
9
0
77 people solved
Aug 12, 2026
Socure logo
Socure
Hard
Software Engineer Locked

Implement a Concurrent Payment Queue with Visibility Timeouts

Implement an in-memory payment queue with atomic receives, visibility timeouts, ACK races, stale-callback protection, and idempotent payment processin...

Software Engineering FundamentalsConcurrencyData Structure Design
4
0
32 people solved
Sep 5, 2026
Amazon logo
Amazon
Medium
Software Engineer

Deliver an Important Project Under a Tight Deadline

Describe an important project you delivered under a tight deadline, including the tradeoffs and business impact. Constraints & Assumptions Use a real ...

Behavioral & LeadershipOwnership & ExecutionPrioritization & Tradeoffs
1
0
11 people solved
Sep 14, 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
104 people solved
Aug 6, 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
Instacart logo
Instacart
Hard
Software Engineer Locked

Library Catalog and Lending System: Five-Phase Engineering Assessment

Practice a five-phase library catalog and lending assessment that combines requirements clarification, coding-assistant implementation, manual metrics...

Software Engineering Fundamentals
7
0
61 people solved
Aug 3, 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
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