Arista Networks System Software Engineer Interview Questions and Answers

Normal dsa Basics and aptitude.

Q1. Give the elements of an array that sum up to given number.
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Q2. Binary search using recursion.
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Q1. Why should we hire you?
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Q2. Why are you interested to join juniper?
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Q1. Create your own hashmap
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Q1. Subarray Sum divisible by K
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Find the number of subarrays whose sum is divisible by K.
• Use prefix sum technique to calculate the sum of subarrays efficiently.

• Keep track of the remainders of prefix sums when divided by K.

• Use a hashmap to store the count of each remainder.

• For each prefix sum, check how many previous prefix sums have the same remainder.

• Add the count of subarrays with the same remainder to the total count.
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Q1. Interests and open to work from Bangalore
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Difficult online round

Q1. Arrays from neetcode
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Arrays are a collection of strings in programming used to store multiple values under a single variable name.
• Arrays are declared using square brackets []

• Each element in an array is accessed by its index, starting from 0

• Example: var fruits = ['apple', 'banana', 'orange']
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Q2. Linked list from neetcode
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Q1. Trees in neet code
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Trees in neet code refer to the implementation of tree data structures in coding challenges on the platform NeetCode.
• Trees are a common data structure used in coding challenges to represent hierarchical relationships between data.

• Common tree operations include traversal (inorder, preorder, postorder), insertion, deletion, and searching.

• Examples of tree-related coding challenges on NeetCode include implementing a binary...read more
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Q2. Trees in leet code
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Trees in leetcode are a common topic for coding interviews, involving various tree traversal and manipulation techniques.
• Understand different tree traversal methods like inorder, preorder, and postorder.

• Learn about common tree algorithms like finding the height, diameter, and lowest common ancestor.

• Practice solving tree-related problems on leetcode to improve your skills.
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Q1. Explain which are IPC mechanism
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IPC mechanisms are used for inter-process communication in software development.
• IPC mechanisms allow processes to communicate with each other, either on the same machine or across a network.

• Common IPC mechanisms include pipes, message queues, shared memory, sockets, and signals.

• Examples of IPC mechanisms include using sockets for network communication between client and server applications, or using shared memory for c...read more
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Q1. Explain the Socket communication
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Socket communication is a method of communication between two processes on a network using sockets.
• Socket communication involves a client and a server communicating over a network.

• It uses TCP or UDP protocols to establish a connection.

• Data is exchanged through sockets using read and write operations.

• Sockets can be used for various applications like web browsing, email, and file transfer.
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Q1. They asked OS fundamentals
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Q1. I2c Spi protocol implementation
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I2C and SPI are serial communication protocols used for connecting microcontrollers to peripherals.
• I2C (Inter-Integrated Circuit) is a synchronous, multi-master, multi-slave, packet-switched protocol commonly used for communication between integrated circuits.

• SPI (Serial Peripheral Interface) is a synchronous, full-duplex, master-slave communication protocol commonly used for communication between microcontrollers and ...read more
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Q1. Last company experience and details
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At my last company, I developed software solutions, collaborated with teams, and ensured high-quality code delivery.
• Led a team of 5 developers in creating a web application that improved user engagement by 30%.

• Implemented Agile methodologies, resulting in a 20% increase in project delivery speed.

• Conducted code reviews and provided mentorship to junior developers, enhancing team skills.

• Collaborated with cross-functional...read more
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Q1. Shared memory, threading , synchronization mechanism
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DSA ques were moderate and aptitude ques were also asked

Q1. DSA ques on array was asked
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Q2. DSA ques on graph
Ans. 
Graph algorithms are essential for solving problems related to networks, paths, and connectivity in data structures.
• Graphs can be represented using adjacency lists or matrices.

• Common algorithms include Depth-First Search (DFS) and Breadth-First Search (BFS).

• Dijkstra's algorithm finds the shortest path in weighted graphs.

• Topological sorting is used for scheduling tasks based on dependencies.

• Example: Finding connected co...read more
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Leetcode live coding with team members

How do u design the network as per the cloud customer requirements

Q1. Regarding Java memory management
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Q1. Regarding RMI process
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Q1. Find a duplicate in a String OOPs concept Java 8 features
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The question is about finding a duplicate in a string.
• Convert the string into an array of characters

• Create a HashSet to store unique characters

• Iterate through the array and check if each character is already present in the HashSet

• If a character is already present, it is a duplicate
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Q1. Java OOPs concept Comparator vs Comparable Streams Lambda Expression
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Comparator vs Comparable, Streams, Lambda Expression
• Comparator and Comparable are interfaces used for sorting objects in Java

• Comparator is used for custom sorting logic, while Comparable is used for natural sorting order

• Streams are a sequence of elements that can be processed in parallel or sequentially

• Lambda expressions are used to write concise and functional code in Java
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Q1. System Desing of Network Management System
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A network management system is designed to monitor and control network devices and ensure their efficient operation.
• The system should have a centralized dashboard to display real-time network status and performance metrics.

• It should support automated network discovery and device configuration management.

• The system should provide alerts and notifications for network events and failures.

• It should have the ability to gene...read more
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Q1. Background why Tejas Salary Discussion
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