Greenovative Energy Interview Questions, Process, and Tips

There was a machine test organised as the 1st round of the interview process. The machine test was on Angular

Q1. Throw some light on the new angular feature that doesn't use @NgModule
Ans. 
The new Angular feature that doesn't use @NgModule is called Ivy.
• Ivy is the new rendering engine in Angular that doesn't rely on @NgModule for compilation.

• It allows for faster compilation times and smaller bundle sizes.

• Ivy enables features like improved tree shaking and better debugging capabilities.

• Example: Angular 9 introduced Ivy as the default rendering engine.
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Q2. How would the application work without @NgModule
Ans. 
The application would not work properly without @NgModule as it is required to bootstrap the application and configure dependencies.
• Without @NgModule, the application would not be able to bootstrap and start properly.

• NgModule is used to configure dependencies, such as components, directives, and services.

• NgModule also helps in organizing the application into modules for better maintainability and reusability.
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Q3. Mid level Angular interview questions
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Q4. What are types of directives in angular
Ans. 
Types of directives in Angular include structural directives, attribute directives, and component directives.
• Structural directives are used to add or remove elements from the DOM based on conditions (e.g. *ngIf, *ngFor)

• Attribute directives are used to change the appearance or behavior of an element (e.g. ngStyle, ngClass)

• Component directives are custom directives that are components themselves (e.g. @Component)
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Q5. Can a service file have more than one instance? If yes how?
Ans. 
Yes, a service file can have more than one instance by creating multiple instances of the service class.
• Multiple instances of a service class can be created by instantiating the class multiple times.

• Each instance will have its own state and can be used independently.

• This can be useful for scenarios where multiple instances of the same service are needed to handle different tasks.
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Q6. What are pipes in angular?
Ans. 
Pipes in Angular are used for transforming data in templates.
• Pipes are used to format data before displaying it in the view.

• They can be used to filter, sort, or transform data in various ways.

• Examples include currency, date, uppercase, and lowercase pipes.
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Q1. How to make an application scalable?
Ans. 
To make an application scalable, consider using cloud services, optimizing database queries, caching frequently accessed data, and using microservices architecture.
• Utilize cloud services like AWS or Azure for scalability on demand

• Optimize database queries to improve performance

• Implement caching mechanisms for frequently accessed data to reduce load on servers

• Use microservices architecture to break down the application ...read more
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Q2. Interview questions based on architecture of project and less of technical aspects
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Q1. Salary negotiation, polices discussion, company norms and some basic HR questions.
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