QWEEN Software Developer Interview Questions and Answers

In Java, strings are immutable, meaning once created, their values cannot be changed.

• 1. Immutability: Strings cannot be modified after creation. Example: String str = 'Hello'; str = str + ' World'; // creates a new string.

• 2. Memory Efficiency: Immutable strings can be shared, reducing memory usage. Example: String a = 'Java'; String b = a; // both refer to the same object.

• 3. Thread Safety: Immutable strings are inheren...read more

Annotations in Spring Boot are used to simplify the configuration and development of applications.

• Annotations are used to provide metadata about the application's components

• They help in reducing the amount of configuration required

• Examples include @RestController, @Autowired, @RequestMapping

React Js allows for efficient and reusable UI components, virtual DOM for faster rendering, and easy integration with other libraries.

• Efficient and reusable UI components make development faster and easier.

• Virtual DOM allows for faster rendering by only updating the parts of the DOM that have changed.

• Easy integration with other libraries like Redux for state management.

• React Native allows for building mobile apps using...read more

I faced a challenging situation when a website I was working on crashed during a major event.

• I quickly identified the issue and found a solution to fix it.

• I communicated the problem and solution to my team and the client.

• I worked overtime to ensure the website was up and running before the event ended.

• I implemented measures to prevent similar issues from happening in the future.

I handle pressure and tight deadlines by prioritizing tasks, breaking them down into smaller goals, and staying organized.

• I prioritize tasks based on their urgency and importance

• I break down larger tasks into smaller goals to make them more manageable

• I stay organized by using tools like calendars, to-do lists, and project management software

• I communicate with my team and stakeholders to ensure everyone is on the same p...read more