Confluent Interview Questions
Practice 18 real interview questions from Confluent. Covers Coding & Algorithms, System Design, Analytics & Experimentation, Behavioral & Leadership. For roles including Software Engineer, Data Scientist.
"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"
"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"
"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."
"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."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"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."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"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."
"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."
"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."
"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."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"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."
Implement Tail and Find Monster Cost
This entry contains two coding tasks from the same interview category. Task A: Implement a file tail operation Implement a function tail(filePath, n) ...
Design a News Feed and Mail Service
Design the following systems: 1. Aggregate news feed Build a service that ingests articles from many publishers, deduplicates and ranks them, and s...
Design an RSS News Feed Service
Design an RSS news feed service. The service should allow users to subscribe to RSS sources, ingest articles from those sources, store article metadat...
Solve Signature, File, and Queue Problems
Solve the following interview-style problems: 1. Function signature matching You are given a registry of function definitions. Each function has an...
Design RSS Feed and Temporary Mail
This interview included two system design prompts. 1. Design an RSS feed platform Design a service that periodically ingests RSS or similar publish...
Design a temporary email service
Design a Disposable Email Service with Auto-Expiring Addresses You are asked to design a receive-only disposable email service (e.g., 10‑minute inboxe...
Process pod logs with global increments and pop-min
You are given an event log for a system of “pods.” Each event is a pair [status, value]: - status == 1: Add a new pod with initial load = value. - sta...
Implement File Tail and Sensor Health
This interview included two coding tasks. 1. Print the last N lines of a file You are given a very large newline-delimited text file and a limited ...
Rank songs by pairwise user preferences
You are given preference rankings for n users over m songs. Each song is labeled from 0 to m - 1. For each user i (0-indexed), you are given an array ...
Implement tail N lines
Implement a function tail(path: string, N: int) that prints the last N lines of a potentially multi-GB text file without loading the whole file into m...
Solve constrained monster traversal
You are given a directed graph with n rooms labeled 0..n-1; each room i contains a monster with health hp[i] ≥ 0. You start at room s with energy E. E...
Design a distributed key-value store at scale
System Design Prompt: Globally Distributed, Read-Optimized Key-Value Store Context and minimal assumptions Design a globally distributed key-value (KV...
Implement tail N lines
Implement a utility that prints the last N lines of input. Requirements: handle both a regular seekable file and a non-seekable stream (stdin/pipe); s...
Answer standard behavioral prompts
Behavioral & Leadership Prompts (Technical Screen — Software Engineer) Context: You will be asked to answer standard behavioral prompts. Aim for conci...
Explain variadic functions
Variadic Functions in Two Languages + Typesafe Variadic Logger Context Variadic functions accept a variable number of arguments. In systems and backen...
Explain algorithm strategies and complexity
You are faced with a complex, potentially ambiguous coding problem. Describe how you would clarify requirements, identify constraints, propose multipl...
Evaluate Metrics and Randomization for Onboarding Tutorial Change
Scenario A single step within Confluent’s multi-step user-onboarding tutorial was modified. The product team wants to run an experiment to determine w...
Determine Tutorial Completion Rate by Variant in 7 Days
users | user_id | sign_up_at | tutorial_variant | | 101 | 2023-08-01 | original | | 102 | 2023-08-02 | variant | | 103 | 2023-08-02 | original | | 104...