ServiceNow Application Developer Interview Questions and Answers

Q1. Explain react dom in details
Ans. 
React DOM is a package that provides methods for updating the DOM in response to React components.
• React DOM is used to render React components to the DOM.

• It provides methods like ReactDOM.render() to render components.

• React DOM efficiently updates the DOM when the state of a component changes.

• It handles events and updates the DOM accordingly.

• React DOM is separate from React itself, allowing for flexibility in rendering
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Q2. Explain MVC in rails
Ans. 
MVC in Rails is a software design pattern that separates the application into three main components: Model, View, and Controller.
• Model: Represents the data and business logic of the application.

• View: Represents the user interface of the application.

• Controller: Acts as an intermediary between the Model and View, handling user input and updating the Model accordingly.

• Example: In a Rails application, a User model would ha...read more
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Write code for micro service

Q1. Explain singleton
Ans. 
Singleton is a design pattern that restricts the instantiation of a class to one object.
• Singleton pattern ensures that a class has only one instance and provides a global point of access to it.

• Commonly used in scenarios where only a single instance of a class is needed, such as database connections or configuration settings.

• Implementation can involve a private constructor, a static method to access the instance, and a ...read more
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Asked QRE question and some query questions

Q1. Introduce yourself
Ans. 
I am a passionate application developer with experience in creating innovative solutions for various industries.
• Experienced in developing web and mobile applications using languages such as Java, JavaScript, and Swift

• Proficient in database management and integration with applications

• Strong problem-solving skills and ability to work in a team environment

• Familiar with Agile development methodologies and continuous integr
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Q2. What are the technology you are familiar with
Ans. 
I am familiar with a variety of technologies including Java, Python, SQL, HTML, CSS, JavaScript, and Git.
• Java

• Python

• SQL

• HTML

• CSS

• JavaScript

• Git
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