CitiusTech Senior Software Engineer Interview Questions and Answers

I have worked on various message types including JSON, XML, SOAP, and REST.

• JSON - Used for data interchange between systems.

• XML - Used for defining document structures.

• SOAP - Used for communication between applications.

• REST - Used for building APIs and web services.

Design patterns are reusable solutions to common problems in software design.

• Design patterns help in creating maintainable and scalable code.

• Examples include Singleton, Factory, Observer, and Strategy patterns.

• Singleton pattern ensures a class has only one instance.

• Factory pattern creates objects without specifying the exact class.

• Observer pattern defines a one-to-many dependency between objects.

• Strategy pattern define...read more

React Native is a framework for building mobile applications using JavaScript and React.

• Allows developers to write code once and deploy it on both iOS and Android platforms

• Utilizes native components for better performance and user experience

• Supports hot reloading for faster development iterations

useEffect is a hook in React that allows functional components to perform side effects.

• useEffect is used to perform side effects in functional components

• It runs after every render by default

• It can be used to fetch data, subscribe to events, update the DOM, etc.

• It can take a second argument which is an array of dependencies to control when the effect runs

In my last project, we followed the MVC design pattern.

• Model-View-Controller pattern separates data, presentation, and user interaction

• Model represents data, View displays data, Controller handles user input and updates model

• Example: Using AngularJS for front-end (View), Node.js for back-end (Controller), and MongoDB for database (Model)

Yes, I am comfortable with UK time as I have experience working with teams in different time zones.

• Have experience working with teams in different time zones

• Flexible with working hours to accommodate UK time

• Comfortable using tools like Slack or email to communicate asynchronously

I have 5 years of real-time experience working on high-traffic web applications.

• Developed real-time chat feature using WebSockets for instant messaging

• Optimized database queries to handle real-time data updates efficiently

• Implemented real-time analytics dashboard for monitoring user activity

• Worked on real-time bidding system for online advertising platform

Use a subquery to find the second highest salary in a table.

• Use a subquery to select the maximum salary from the table.

• Then use another subquery to select the maximum salary that is less than the maximum salary found in the first subquery.