Interview Questions and Answers

An event loop is a programming construct that waits for and dispatches events or messages in a program.

• Event loop is commonly used in asynchronous programming to handle tasks like I/O operations without blocking the main thread.

• It continuously checks for events in a queue and processes them one by one.

• Examples of event loops include Node.js event loop for handling asynchronous operations in JavaScript.

• Event loop helps in managing the flow of events and tasks in a program effi...read more

A man-in-the-middle attack is a cyber security attack where the attacker secretly intercepts and possibly alters the communication between two parties.

• Attacker intercepts communication between two parties

• Attacker may alter the communication

• Commonly occurs in public Wi-Fi networks

• Can lead to data theft or unauthorized access

Protecting API involves using authentication, authorization, encryption, rate limiting, and monitoring.

• Implement authentication mechanisms such as OAuth, JWT, or API keys

• Use authorization to control access to different parts of the API

• Encrypt sensitive data using SSL/TLS

• Implement rate limiting to prevent abuse and protect against DDoS attacks

• Monitor API traffic for unusual activity and potential security threats

CSRF stands for Cross-Site Request Forgery, a type of attack where a malicious website tricks a user into performing actions on another website without their knowledge.

• CSRF attacks exploit the trust that a site has in a user's browser, by sending unauthorized requests using the user's session.

• Prevent CSRF attacks by using tokens in forms, checking the origin of requests, and implementing proper authentication and authorization.

• Example: A user is tricked into clicking a link o...read more

Distribution refers to the process of making a product or service available to customers through various channels.

• Distribution involves the movement of goods from the manufacturer to the end consumer.

• It includes activities such as warehousing, transportation, and inventory management.

• Distribution channels can be direct (manufacturer to consumer) or indirect (manufacturer to retailer to consumer).

• Examples of distribution channels include wholesalers, retailers, e-commerce plat...read more