Senior Software Engineer 2 Interview Questions and Answers for Freshers

Node.js is a runtime environment that executes JavaScript code outside of a web browser, using an event-driven, non-blocking I/O model.

• Node.js uses the V8 JavaScript engine to execute code.

• It uses an event-driven architecture to handle asynchronous operations.

• Node.js uses a single-threaded event loop to process multiple requests concurrently.

• Callbacks are used to handle asynchronous operations in Node.js.

• Node.js provides modules like 'fs' for file system operations and 'http'...read more

Test cases for a dummy website include checking functionality, usability, security, and performance.

• Verify that all links and buttons are working correctly

• Test user registration and login functionality

• Check for proper error messages when entering invalid data

• Test the website's responsiveness on different devices

• Ensure that user data is stored securely

• Perform load testing to check website performance under heavy traffic

APIPA address in Windows Server is a self-assigned IP address when DHCP server is not available.

• APIPA stands for Automatic Private IP Addressing

• It is a feature in Windows that automatically assigns an IP address in the range of 169.254.0.1 to 169.254.255.254 when a DHCP server is not available

• APIPA is used to ensure that a device can still communicate on a network even if a DHCP server is not present

DNS in Linux environment is a system that translates domain names to IP addresses.

• DNS stands for Domain Name System

• It is responsible for translating human-readable domain names (like google.com) into IP addresses (like 172.217.7.238)

• DNS servers store DNS records which contain information about domain names and their corresponding IP addresses

• Linux systems use DNS to resolve domain names to IP addresses when connecting to the internet

Design a video streaming platform

• Consider the scalability and performance requirements

• Implement a content delivery network (CDN) to distribute video content

• Use adaptive streaming techniques to optimize video quality based on network conditions

• Implement user authentication and authorization mechanisms

• Design a robust video encoding and transcoding system

• Implement a recommendation engine to suggest relevant videos

• Ensure secure video streaming by using encryption and DRM

• Implement...read more

A meeting scheduler to manage and organize meetings efficiently

• Allow users to input meeting details such as date, time, duration, and participants

• Provide options to check availability of participants and suggest available time slots

• Send notifications and reminders to participants

• Integrate with calendar apps for easy scheduling and tracking

Different types of testing include unit testing, integration testing, system testing, and acceptance testing.

• Unit testing focuses on testing individual components or functions in isolation.

• Integration testing verifies that different components work together correctly.

• System testing tests the entire system as a whole.

• Acceptance testing ensures that the system meets the requirements and is ready for deployment.

Design a chat system for real-time communication

• Use WebSocket for real-time communication

• Implement user authentication and authorization

• Store chat messages in a database for persistence

• Support features like group chat, file sharing, and message encryption