Find Interview Questions for Psl

Right Answer:
1. **Domain Name**: Register a domain name that reflects the company's brand.

2. **Web Hosting**: Choose a reliable web hosting service (shared, VPS, or dedicated) based on budget and expected traffic.

3. **Website Development**:
- **Content Management System (CMS)**: Use a CMS like WordPress, Shopify, or Joomla for easy content updates.
- **Design**: Create a responsive design that works on both desktop and mobile devices.

4. **E-commerce Functionality** (if applicable): Integrate e-commerce features for product listings, shopping cart, and payment processing.

5. **Database**: Set up a database (e.g., MySQL) to store user data, product information, and transaction records.

6. **Security**: Implement SSL certificates for secure data transmission and ensure regular security updates.

7. **SEO Optimization**: Optimize the website for search engines to improve visibility.

8. **Analytics**: Integrate tools like

Right Answer:
**Difference between PLC and SCADA:**
- **PLC (Programmable Logic Controller):** A hardware device used for automation of industrial processes, controlling machinery on factory floors.
- **SCADA (Supervisory Control and Data Acquisition):** A software system that monitors and controls industrial processes at a higher level, providing data visualization and management.

**Merits of PLCs:**
- High reliability and durability.
- Real-time control and fast response times.
- Easy to program and modify.
- Suitable for complex control tasks.

**De-merits of PLCs:**
- Limited data handling and visualization capabilities.
- Higher initial cost for complex systems.
- Requires specialized knowledge for programming.

**Merits of SCADAs:**
- Centralized monitoring and control of multiple PLCs.
- Advanced data visualization and reporting capabilities.
- Remote access and control.
- Scalability for large systems.

**De-merits of SCADAs:**
- Higher complexity and cost.
- Vulnerability to cybersecurity

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.

Right Answer:
The different types of APIs are:

1. **Open APIs (Public APIs)** - Available to developers and third parties.
2. **Internal APIs (Private APIs)** - Used within an organization.
3. **Partner APIs** - Shared with specific business partners.
4. **Composite APIs** - Combine multiple endpoints into a single call.
5. **Web APIs** - Accessible over the internet using HTTP/HTTPS.

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.

Right Answer:
API versioning is the practice of managing changes to an API by assigning version numbers to different iterations of the API. It is important because it allows developers to introduce new features or make changes without breaking existing client applications that rely on older versions, ensuring backward compatibility and a smoother transition for users.

Right Answer:
Webhooks are user-defined HTTP callbacks that are triggered by specific events in a web application, allowing real-time data transfer. They differ from APIs in that APIs require a request to be made to receive data, while webhooks automatically send data when an event occurs without needing a request.

Right Answer:
```csharp
using System;

class Animal
{
public virtual void Speak()
{
Console.WriteLine("Animal speaks");
}
}

class Dog : Animal
{
public override void Speak()
{
Console.WriteLine("Dog barks");
}
}

class Cat : Animal
{
public override void Speak()
{
Console.WriteLine("Cat meows");
}
}

class Program
{
static void Main(string[] args)
{
Animal myDog = new Dog();
Animal myCat = new Cat();

myDog.Speak(); // Output: Dog barks
myCat.Speak(); // Output: Cat meows
}
}
```

Right Answer:
Yes, you can refresh static components of a deployed application without redeploying the entire application by using techniques such as cache busting, updating files directly on the server, or using a content delivery network (CDN) to serve updated static assets.

Right Answer:
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Right Answer:
Pseudo-classes in CSS are special keywords added to selectors that specify a special state of an element. They allow you to style elements based on their state, such as `:hover` for when a user hovers over an element, or `:focus` for when an element is selected.

Right Answer:
To set up a database in Django, follow these steps:

1. **Install Database Driver**: Install the appropriate database driver for your database (e.g., `psycopg2` for PostgreSQL, `mysqlclient` for MySQL).

2. **Configure Database Settings**: In your Django project's `settings.py` file, update the `DATABASES` setting with your database configuration. For example:

```python
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql', # or 'mysql', 'sqlite3', etc.
'NAME': 'your_database_name',
'USER': 'your_username',
'PASSWORD': 'your_password',
'HOST': 'localhost', # or your database host
'PORT': '5432', # or your database port
}
}
```

3. **Run Migrations**: Execute the following command to create the necessary database tables

Right Answer:
Flask is a lightweight web framework for Python that allows developers to build web applications quickly and easily. Its benefits include:

1. **Simplicity**: Flask has a simple and easy-to-understand structure, making it beginner-friendly.
2. **Flexibility**: It is unopinionated, allowing developers to choose how to implement features.
3. **Extensibility**: Flask supports extensions that can add functionality as needed.
4. **Built-in Development Server**: It includes a built-in server for testing applications during development.
5. **RESTful Request Dispatching**: Flask makes it easy to create RESTful APIs.
6. **Large Community**: It has a strong community and extensive documentation for support.