Furlenco Software Development Engineer II Interview Questions and Answers

Q1. DSA - level order traversal, sliding window.
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Q1. Atomic transaction in distributed system
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Atomic transactions ensure that all operations in a transaction are completed successfully or none at all in a distributed system.
• Atomic transactions guarantee that all operations within a transaction are either all successful or all rolled back.

• In distributed systems, atomic transactions are crucial for maintaining data consistency across multiple nodes.

• ACID properties (Atomicity, Consistency, Isolation, Durability) a...read more
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Q1. Time Window Map
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1 hour duration. Sliding window problem. On hacker rank platform. Expected to write a working code and solve it optimally/scalable solution.

Q1. Again a coding test. LLD + hash map. 1 hour on hacker rank.
Ans. 
Design a system to manage user sessions using a hash map for efficient access and storage.
• Use a hash map to store user sessions with session ID as the key and user data as the value.

• Implement methods to create, retrieve, and delete sessions efficiently.

• Consider session expiration and implement a cleanup mechanism.

• Example: For a session ID 'abc123', store user data like { 'userId': 1, 'lastAccess': '2023-10-01T12:00:00Z...read more
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Q1. Techical questions and coding questions related profile.
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Q2. Basic concepts about your programming skills.
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I possess strong programming skills in various languages, focusing on problem-solving and software design principles.
• Proficient in languages like Java, Python, and JavaScript, enabling versatile application development.

• Experience with object-oriented programming (OOP) principles, such as encapsulation and inheritance, to create modular code.

• Familiar with data structures and algorithms, optimizing performance; for examp...read more
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Question on dsa and string theory along with oops concepts

Q1. Question on java strings and arrays
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Q1. How can we improve the performance of a Front End System
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Q2. What is Event Loop and give an example on how it works.
Ans. 
Event Loop is a mechanism that allows JavaScript to handle multiple tasks simultaneously.
• Event Loop is a part of JavaScript runtime that continuously checks the call stack and the task queue.

• It prioritizes the tasks in the queue and pushes them to the call stack when it's empty.

• This allows JavaScript to handle I/O operations and other asynchronous tasks without blocking the main thread.

• Example: setTimeout() function ad...read more
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It was a 1 hour Technical screening round, coding question in java (you cna choose your own language). They asked a difficult version of regex matching question (Leetcode medium-hard).