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Jupiter Interview Questions and Answers
Ques:- What are runnable entities and how are they scheduled by the RTE
Right Answer:
Runnable entities are the basic units of execution in AUTOSAR that encapsulate the functionality of a software component. They are scheduled by the RTE (Runtime Environment) based on the configured timing and triggering mechanisms, such as periodic or event-driven scheduling, ensuring that they are executed at the appropriate times according to the system's requirements.
Ques:- What is Alfresco Process Services (Activiti) and how is it used for BPM
Right Answer:
Alfresco Process Services (APS), formerly Activiti, is a Business Process Management (BPM) engine. It allows you to design, automate, and manage business processes using BPMN 2.0. APS is used to model workflows, execute them, and monitor their progress, enabling organizations to streamline operations and improve efficiency.
Ques:- What is microservices architecture and how does it differ from monolithic architecture
Right Answer:
Microservices architecture is a software design approach where an application is built as a collection of small, independent services that communicate over APIs. Each service is responsible for a specific function and can be developed, deployed, and scaled independently.

In contrast, monolithic architecture is a traditional approach where an application is built as a single, unified unit. All components are tightly integrated and run as one process, making it harder to scale and update individual parts without affecting the whole system.
Ques:- What are ARXML files and how are they used
Right Answer:
ARXML files are XML-based files used in the AUTOSAR (AUTomotive Open System ARchitecture) standard to describe the software architecture of automotive systems. They contain information about software components, their interfaces, and the configuration of the system, facilitating communication and integration between different software modules and tools in the development process.
Ques:- How do you create and manage templates and components in AEM
Right Answer:
To create and manage templates and components in AEM, follow these steps:

1. **Create a Template**:
- Navigate to the AEM Sites console.
- Select the appropriate site and click on "Create" > "Page".
- Choose a template from the available options or create a new one using the Template Editor.

2. **Create a Component**:
- Go to the AEM Sites console and navigate to the "Apps" folder.
- Right-click on the desired location and select "Create" > "Component".
- Define the component properties, including name, description, and the component type (e.g., HTL, JSP).

3. **Manage Templates and Components**:
- Use the AEM Touch UI or Classic UI to edit, configure, and manage templates and components.
- Utilize the "Component Policy" to define the behavior and properties of components.
- Version control can be managed through AEM's built-in versioning features.

4. **Testing and Publishing**:
- Test the templates and components in the author environment.
- Once verified, publish them to the publish environment for live use.

5. **Maintain and Update**:
- Regularly review and update templates and components as needed to ensure they meet project requirements and best practices.
Ques:- What is the use of ‘key’ in react list?
Right Answer:
The 'key' in a React list is a unique identifier for each element in the list, which helps React efficiently update and re-render components by tracking changes, additions, or removals.
Comments
Admin Feb 3, 2020

Keys are used to provide each list element with a stable identity. The keys should be unique. The best practice is to use ‘id’ of the data as the key.

Ques:- What is django architecture?
Right Answer:
Django follows the Model-View-Template (MVT) architecture. In this architecture, the Model represents the data structure, the View handles the business logic and user requests, and the Template is responsible for rendering the user interface.
Ques:- How you are deploying applicaiton with apache?
Right Answer:
To deploy a Django application with Apache, follow these steps:

1. **Install Apache and mod_wsgi**: Ensure Apache and the mod_wsgi module are installed on your server.

2. **Configure Apache**: Create a new configuration file for your Django project in the Apache sites-available directory. For example, `/etc/apache2/sites-available/myproject.conf`.

3. **Add the following configuration**:
```apache
<VirtualHost *:80>
ServerName yourdomain.com
ServerAlias www.yourdomain.com
DocumentRoot /path/to/your/project

WSGIDaemonProcess myproject python-home=/path/to/your/venv python-path=/path/to/your/project
WSGIProcessGroup myproject
WSGIScriptAlias / /path/to/your/project/myproject.wsgi

<Directory /path/to/your/project>
<Files myproject.wsgi>
Require all granted
</
Ques:- What are RESTful principles and how do they apply to API design
Right Answer:
RESTful principles include:

1. **Statelessness**: Each API call must contain all the information needed to understand and process the request, with no stored context on the server.
2. **Client-Server Architecture**: The client and server are separate, allowing for independent development and scalability.
3. **Uniform Interface**: A consistent way to interact with resources, typically using standard HTTP methods (GET, POST, PUT, DELETE).
4. **Resource-Based**: APIs should expose resources (data entities) through URIs, and clients interact with these resources.
5. **Representation**: Resources can be represented in various formats (like JSON or XML), and clients can request the format they prefer.
6. **Cacheability**: Responses should indicate whether they can be cached to improve performance and reduce server load.

These principles guide the design of APIs to be scalable, efficient, and easy to use.
Ques:- What is the difference between GET, POST, PUT, and DELETE in HTTP
Right Answer:
GET is used to retrieve data from a server, POST is used to send data to a server to create a resource, PUT is used to update an existing resource on the server, and DELETE is used to remove a resource from the server.
Ques:- What is the role of an API Gateway in microservices architecture
Right Answer:
An API Gateway acts as a single entry point for clients to access multiple microservices, handling requests, routing them to the appropriate services, managing authentication, rate limiting, and aggregating responses.
Ques:- What are HTTP methods and how are they used in APIs
Right Answer:
HTTP methods are standardized request types used in APIs to perform actions on resources. The main methods are:

1. **GET**: Retrieve data from a server.
2. **POST**: Send data to a server to create a new resource.
3. **PUT**: Update an existing resource on the server.
4. **DELETE**: Remove a resource from the server.
5. **PATCH**: Apply partial modifications to a resource.

These methods define the action to be performed on the specified resource in the API.
Ques:- What is CORS and how does it affect API development
Right Answer:
CORS, or Cross-Origin Resource Sharing, is a security feature implemented by web browsers that allows or restricts web applications from making requests to a domain different from the one that served the web page. It affects API development by requiring developers to configure their APIs to specify which origins are allowed to access their resources, ensuring that only trusted domains can interact with the API.
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