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Arista Networks Interview Questions and Answers
24 Interview questions
I have extensive experience with Python, focusing on data analysis, automation, and machine learning applications.
Proficient in using libraries like Pandas and NumPy for data manipulation and analysis.
Developed automation scripts using Python to streamline repetitive tasks, improving efficiency by 30%.
Experience with web frameworks like Flask for building RESTful APIs.
Worked on machine learning projects using Scik...
ARP resolves IP addresses to MAC addresses in a local network, facilitating communication between devices.
1. ARP Request: A device broadcasts an ARP request to find the MAC address corresponding to an IP address.
2. Broadcast: The ARP request is sent to the MAC address FF:FF:FF:FF:FF:FF, reaching all devices in the local network.
3. ARP Reply: The device with the matching IP address responds with an ARP reply contai...
Inverting bits means flipping each bit in a binary representation from 0 to 1 and from 1 to 0.
Bitwise NOT Operator: In many programming languages, the bitwise NOT operator (~) can be used to invert bits. For example, ~5 (binary 0101) results in -6 (binary 1010).
Binary Representation: To invert bits, first convert a number to its binary form. For example, the binary of 6 is 110, and inverting it gives 001.
Example: ...
Understanding C++ pointers and address debugging is crucial for effective memory management and error resolution.
Pointers store memory addresses, allowing direct access to variables.
Example: int* ptr = &var; // ptr holds the address of var.
Dereferencing a pointer: *ptr gives the value at the address stored in ptr.
Pointer arithmetic: ptr++ moves the pointer to the next memory location.
Null pointers: Always init...
To check if a linked list is a palindrome, compare the first half of the list with the reversed second half.
Traverse the linked list to find the middle node
Reverse the second half of the linked list
Compare the first half with the reversed second half to check for palindrome
Comparing two strings using char pointers in C/C++
Use char pointers to iterate through each character of the strings
Compare characters at each position until a difference is found
Return 0 if strings are equal, -1 if first string is less than second, 1 if first string is greater
Check if a string containing parenthesis, curly brackets, and square brackets is valid.
Use a stack to keep track of opening brackets
Pop from stack when encountering a closing bracket, ensuring it matches the corresponding opening bracket
Return false if stack is not empty at the end
Implement session locking to prevent concurrent ticket booking by multiple users.
Implement session locking mechanism to ensure only one user can book tickets at a time.
Use a unique session ID for each user to track their booking process.
Lock the session when a user starts booking tickets and release the lock once the booking is completed.
Display a message to other users trying to book tickets if the session is alr...
Real-time synchronization of todo list across multiple devices using short polling and web sockets.
Implement short polling to regularly check for updates on the server and update the UI accordingly.
Use web sockets for real-time communication between devices to instantly push updates to all connected clients.
Maintain a centralized database to store and retrieve the todo list data for all devices.
Utilize a messaging...
Calculate the running median of a stream of numbers.
Use two heaps - a max heap for the smaller half of the numbers and a min heap for the larger half.
Keep the heaps balanced by ensuring the size difference is at most 1.
If the heaps are balanced, the median is the average of the top elements of the two heaps. Otherwise, it is the top element of the larger heap.
Arista Networks Interview Experiences
48 interviews found
Anonymous
I appeared for an interview in Apr 2025, where I was asked the following questions.
- Q1. For an embedded software role, too many coding questions on strings which did not make sense for an experienced candidate (10+ years). It is good to test the hands-on skills even for experienced candidates...
- Q2. Contrary to the JD and interview prep guidelines, where I expected WiFi domain related questions and RTOS concepts, Round2 questions were not fully relatable to me. Not too difficult, but candidate prepara...
nisarga lolage
(2 Questions)
- Q1. Check if the linked list is palindrome or not
- Ans.
To check if a linked list is a palindrome, compare the first half of the list with the reversed second half.
Traverse the linked list to find the middle node
Reverse the second half of the linked list
Compare the first half with the reversed second half to check for palindrome
- Q2. C string questions
(2 Questions)
- Q1. Operating systems questions
- Q2. Linked list and system design question
Skills evaluated in this interview
(2 Questions)
- Q1. C++ Pointer, address debugging question
- Ans.
Understanding C++ pointers and address debugging is crucial for effective memory management and error resolution.
Pointers store memory addresses, allowing direct access to variables.
Example: int* ptr = &var; // ptr holds the address of var.
Dereferencing a pointer: *ptr gives the value at the address stored in ptr.
Pointer arithmetic: ptr++ moves the pointer to the next memory location.
Null pointers: Always initializ...
- Q2. Internal working of Hashmap in c C++ debugging the code
- Ans.
Hashmap in C/C++ stores key-value pairs using a hash function for fast retrieval.
Hashmap uses a hash function to map keys to indices in an array.
Collision handling is done using techniques like chaining or open addressing.
Hashmap allows for fast insertion, deletion, and lookup of key-value pairs.
Example: std::unordered_map in C++ implements a hashmap.
Debugging hashmap code involves checking hash function, collision res...
Skills evaluated in this interview
Selected
I applied via Approached by Company and was interviewed in Jul 2024. There were 3 interview rounds.
(2 Questions)
- Q1. Trie based question
- 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
(2 Questions)
- Q1. Unique ID generator
- Ans.
A unique ID generator creates distinct identifiers for entities, ensuring no duplicates across a system.
Use UUIDs (Universally Unique Identifiers) for global uniqueness. Example: '550e8400-e29b-41d4-a716-446655440000'.
Timestamp-based IDs can ensure uniqueness over time. Example: '20231005123000' for a timestamp.
Combining user-specific data with random elements can create unique IDs. Example: 'user123-abc456'.
Consider u...
- Q2. Project related questions
(2 Questions)
- Q1. Operating systems, DBMS
- Q2. Few question on projects from my previous company
Skills evaluated in this interview
I applied via Approached by Company and was interviewed in Mar 2024. There were 3 interview rounds.
Javascript concepts. Polyfill for debounce. Event loop. Questions based on your resume.
(2 Questions)
- Q1. Design a ticket booking platform(Core problem: How would you prevent concurrent ticket booking by multiple users)
- Ans.
Implement session locking to prevent concurrent ticket booking by multiple users.
Implement session locking mechanism to ensure only one user can book tickets at a time.
Use a unique session ID for each user to track their booking process.
Lock the session when a user starts booking tickets and release the lock once the booking is completed.
Display a message to other users trying to book tickets if the session is already ...
- Q2. Questions from resume(The entire interview went on for 2 hours)
(3 Questions)
- Q1. This was the final round(on-site) and was based on Architecture + cultural fit, conducted by one of their Directors / Associate Director. Was asked questions like reasons for switch, expectation in Arista,...
- Q2. In a todo application a user's data is supposed to be synced in multiple devices. When there is a change made in the todo list in one device, the other device's UI needs to update without refresh. How woul...
- Ans.
Real-time synchronization of todo list across multiple devices using short polling and web sockets.
Implement short polling to regularly check for updates on the server and update the UI accordingly.
Use web sockets for real-time communication between devices to instantly push updates to all connected clients.
Maintain a centralized database to store and retrieve the todo list data for all devices.
Utilize a messaging queu...
- Q3. Pick one of your projects from your resume and explain.
- Ans.
Developed a responsive e-commerce website using React and Redux
Utilized React for building the user interface
Implemented Redux for managing the application state
Designed a responsive layout for optimal viewing on different devices
Interview Preparation Tips
- Computer Networking
- Javascript
- System Design
Skills evaluated in this interview
Selected
I appeared for an interview in Mar 2025, where I was asked the following questions.
- Q1. Explain the in detail about the project worked in your previous company??
- Q2. Explain the packet format of frame, ARP, IP, OSPF, BGP, MPLS
- Ans.
Overview of packet formats for various network protocols including ARP, IP, OSPF, BGP, and MPLS.
ARP (Address Resolution Protocol): Used to map IP addresses to MAC addresses. Packet includes hardware type, protocol type, hardware size, protocol size, opcode, sender MAC, sender IP, target MAC, target IP.
IP (Internet Protocol): Responsible for addressing and routing packets. IPv4 header includes version, header length, ty...
Interview Preparation Tips
I applied via Recruitment Consulltant and was interviewed in Aug 2024. There were 2 interview rounds.
(2 Questions)
- Q1. Tell me about your previous company role ?
- 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.
One Hr interview with 3-4 coding questions on strings,array and linked list
Piyush Garg
(1 Question)
- Q1. A string contains parenthesis, curly brackets and square brackets. Check if the string is valid or not.
- Ans.
Check if a string containing parenthesis, curly brackets, and square brackets is valid.
Use a stack to keep track of opening brackets
Pop from stack when encountering a closing bracket, ensuring it matches the corresponding opening bracket
Return false if stack is not empty at the end
Skills evaluated in this interview
I applied via Campus Placement and was interviewed in Sep 2024. There was 1 interview round.
DSA MCQ on Computer Core Subjects
Rahul Mishra
(1 Question)
- Q1. Linked list and double pointers
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Arista Networks Interview FAQs
Some of the top questions asked at the Arista Networks interview -
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Arista Networks Reviews and Ratings
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1-6 Yrs
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