Senior+ Software Engineering Fundamentals Interview Questions
Practice the exact questions companies are asking right now.
"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."
Design a Multi-Producer Multi-Consumer Circular Buffer
Design a Multi-Producer Multi-Consumer Circular Buffer Design a fixed-capacity circular buffer shared by multiple producer and consumer threads. Produ...
Walk Through an Agentic PDF Evaluation Codebase
Walk through an agentic PDF evaluation codebase, including architecture, deployment, data processing, embeddings, similarity, and state management. <d...
Java, Spring & Kafka Fundamentals Deep-Dive
This question tests depth of knowledge across core Java, Spring Boot, and Kafka fundamentals commonly required for senior backend engineering roles. I...
Build a Custom CompletableFuture: Async Primitive and Parallel Array Processing
You are asked to design and implement, from scratch, a simplified asynchronous "future / promise" abstraction in the spirit of Java's CompletableFutur...
Implement A Mobile Chat Interface In An Existing Codebase
You are given an existing mobile codebase and asked to implement a ChatGPT-style chat screen in about 40 minutes. Describe how you would read the proj...
Evolve Cursor Pagination Without Breaking Clients
Debug bidirectional cursor pagination when many transactions share the same timestamp, then add amount sorting without breaking old clients. Define st...
Implement Layered Endpoint and Global Rate Limits
Design an in-process rolling-window rate limiter that enforces both per-endpoint and backend-wide limits atomically. Examine boundary semantics, concu...
Run Promise Tasks with Bounded Concurrency
Run Promise Tasks with Bounded Concurrency The source reports a pure TypeScript or JavaScript coding round involving Promises, but it does not preserv...
Design a Thread-Safe Bounded Blocking Queue
Design a Thread-Safe Bounded Blocking Queue Design a fixed-capacity FIFO queue shared by multiple producer and consumer threads. Provide operations eq...
Review Code for Memory Risks
This question evaluates competency in memory management, performance analysis, and code-review skills for frontend implementations that deduplicate ob...
Design and Implement an Idempotency Layer for Order Creation
Design an idempotency layer above an order creation service so duplicate client retries do not create duplicate orders. <details> <summary>Hint 1</sum...
Build an Interactive Filtered Tree View
Build an Interactive Filtered Tree View Build a frontend component that accepts an n-ary tree and a text filter. If a node's value contains the filter...
Build a Debounced Autocomplete Search Bar
Build a Debounced Autocomplete Search Bar Design and implement an autocomplete search bar that waits briefly after typing before requesting suggestion...
Debug an Angular UI from User Reports
Debug an Angular UI from User Reports You receive an existing Angular frontend code sample and several concrete user-reported failures. Reproduce each...
Clarify and Implement Search Filters for a Library Table
Clarify and Implement Search Filters for a Library Table An existing library-management application shows a book table that users find too long and di...
Data Pipeline Reliability, Backfills, and Spark Optimization
You are interviewing for a senior data engineering role on an analytics and observability team. The interviewer asks a sequence of practical questions...
How do you conduct a code review exercise?
In a live interview, you are shown a short code change — a diff, a pull request, or a standalone function — and asked to produce written code review c...
Build Resilient Aggregation and Debug Routing
This onsite combined two software-engineering exercises: 1. Implement a service method that calls multiple mock downstream APIs, merges their response...
Test and Run a Reproducible Data Science Pipeline
Design unit and integration tests for a Python data science pipeline that loads data, builds features, trains a model, and writes predictions. Add a r...
Explain How You Would Test a System
Explain how to test a system by first defining its contract, invariants, risks, and trustworthy oracles. Build a layered strategy spanning unit, prope...