Arista Networks Interview Questions and Answers for Experienced

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...read more

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...read more

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

Traverse a directory in JavaScript using Node.js to list files and subdirectories.

• Use the 'fs' module to interact with the file system: const fs = require('fs');

• Use 'fs.readdir' to read the contents of a directory: fs.readdir(path, callback);

• Recursively call the function for subdirectories to traverse deeply.

• Example: function traverseDir(dir) { fs.readdir(dir, (err, files) => { ... }); }

The question asks to find the memory of a given structure by considering struct padding.

• Struct padding refers to the unused bytes added to align the members of a structure.

• To find the memory of a structure, we need to consider the size of each member and the padding added.

• The total memory of a structure is the sum of the sizes of its members and the padding.

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, collisio...read more