PureCode Software Interview Question

Explain the concept of prototypal inheritance in JavaScript. How is it different from classical inheritance? What are Promises in JavaScript? How do they help in asynchronous programming? Discuss the differences between undefined and null in JavaScript. Implement a binary search algorithm. Discuss its time complexity. What is the difference between a stack and a queue? Provide examples of their usage. How does MongoDB handle transactions? What are its limitations compared to traditional SQL databases? What is indexing in MongoDB? How does it improve query performance?