Arista Networks Software Engineer Interview Questions, Process, and Tips

Q1. Trie based question
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Q2. Design LRU cache
Ans. 
Design a data structure for LRU cache with get and put operations, evicting least recently used item when capacity is reached.
• Implement a doubly linked list to keep track of the order of keys based on their usage

• Use a hashmap to store key-value pairs for quick access

• Update the order of keys in the linked list when a key is accessed or inserted

• Evict the least recently used item when the cache reaches its capacity
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Q1. Unique ID generator
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Q2. Project related questions
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Q1. Operating systems, DBMS
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Q2. Few question on projects from my previous company
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Q1. Tell me about your previous company role ?
Ans. 
I was a software engineer responsible for developing and maintaining web applications for a financial services company.
• Developed and maintained web applications using technologies such as Java, Spring, and Angular

• Collaborated with cross-functional teams to gather requirements and deliver solutions

• Participated in code reviews and testing to ensure high quality software

• Implemented new features and enhancements to improve
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Q2. Willing to join Arista ?
Ans. 
Yes, I am willing to join Arista as a Software Engineer.
• I am excited about the opportunity to work at Arista and contribute to their innovative projects.

• I have researched the company and believe that my skills align well with their values and goals.

• I am confident that I can make a positive impact on the team and help drive success at Arista.
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One Hr interview with 3-4 coding questions on strings,array and linked list

Question from Strings and Question from Linked Lists

Q1. What are double pointers ?
Ans. 
Double pointers are pointers that store the memory address of another pointer.
• Double pointers are used in C and C++ to store the address of a pointer variable.

• They are commonly used in functions to modify the value of a pointer passed as an argument.

• Example: int **ptr; // declares a double pointer to an integer pointer.
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Q2. Discuss OOPS in Programming.
Ans. 
OOPS stands for Object-Oriented Programming, a programming paradigm based on the concept of objects.
• OOPS focuses on creating objects that contain both data and methods to manipulate that data.

• Encapsulation, inheritance, and polymorphism are key principles of OOPS.

• Example: Inheritance allows a class to inherit properties and methods from another class, promoting code reusability.
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Q1. You Have a Data Stream and integers are coming at each second you have to identify the erroneous values.
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