CitiusTech Software Engineer Interview Questions and Answers

Replacing a server involves migrating data, setting up new hardware, and testing for functionality.

• Backup all data and configurations from the old server

• Set up the new server hardware and install necessary software

• Migrate data and configurations to the new server

• Test the new server for functionality and performance

• Update DNS records and network configurations to point to the new server

Object-Oriented Programming (OOP) concepts include encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: Bundling data and methods that operate on the data within one unit (class). Example: A class 'Car' with attributes like 'speed' and methods like 'accelerate()'.

• Inheritance: Mechanism where a new class inherits properties and behavior from an existing class. Example: 'ElectricCar' inherits fro...read more

Angular is a front-end framework that uses components to build dynamic web applications.

• Angular applications are built using TypeScript, a superset of JavaScript.

• Components are the building blocks of an Angular application.

• Angular uses a hierarchical dependency injection system to manage dependencies.

• Angular applications are loaded and run in the browser.

• Angular applications can communicate with servers using HTTP...read more

I have used various HTML attributes such as id, class, src, href, alt, style, etc.

• id

• class

• src

• href

• alt

• style

package.json is a configuration file used in Node.js projects to manage dependencies and scripts.

• Contains metadata about the project such as name, version, and author

• Lists dependencies and devDependencies required for the project

• Allows for the creation of custom scripts to run tasks

• Can be used to specify the main file of the project

• Can be generated using 'npm init' command

To scale up application, use load balancers and monitor logs to identify failures.

• Use load balancers to distribute traffic across multiple instances

• Monitor logs to identify where the failure occurred

• Implement fault tolerance and redundancy to prevent future failures

• Use auto-scaling to automatically add or remove instances based on traffic

• Real-world example: Amazon Web Services (AWS) uses load balancers and auto-sc...read more