Fastenal Senior Software Engineer Interview Questions and Answers

Q1. Node JS internal
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Q2. Previous project discussion
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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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Q1. Design pattern experience
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I have extensive experience with various design patterns such as Singleton, Factory, Observer, and MVC.
• Implemented Singleton pattern to ensure only one instance of a class exists

• Utilized Factory pattern to create objects without specifying the exact class

• Implemented Observer pattern for event handling and notifications

• Utilized MVC pattern for separating concerns in a software application
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45 min round. Similar to Leetcode medium level question.

45 min coding round, 2 question asked

Q1. System design of proximity service
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Design a system for proximity service
• Utilize geolocation data to track user locations

• Implement algorithms to calculate proximity between users

• Use real-time updates to notify users of nearby contacts
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Q1. Behavioral questions
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Q1. Introduction about yourself and expectation
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Q1. IOS questions and architecture question about modularisation. From resume.
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Q2. Question Asked about memory management
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Q3. Question about modularisation and interface design
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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. Design Notification Observer Design Pattern, if not provided iOS.
Ans. 
Notification Observer Design Pattern is used to establish a one-to-many relationship between objects.
• Create a subject class that maintains a list of observers and notifies them of any state changes.

• Observers register themselves with the subject to receive notifications.

• Use protocols and delegates in iOS to implement the observer pattern.

• Example: NotificationCenter in iOS uses the observer pattern to broadcast notificat
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Q1. Based on tree data structure
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Q1. Mangerial round. Manager also asked some technical questions on iOS.
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Q1. Salary discussion
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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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