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Right Answer:
Estimating the costs of building a metro involves several factors, including land acquisition, construction materials, labor, equipment, and operational expenses. A rough estimate can range from $100 million to over $1 billion per mile, depending on the location, complexity, and design of the metro system.

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.

Right Answer:
The common status codes in HTTP responses are:

- **200**: OK
- **201**: Created
- **204**: No Content
- **400**: Bad Request
- **401**: Unauthorized
- **403**: Forbidden
- **404**: Not Found
- **500**: Internal Server Error
- **502**: Bad Gateway
- **503**: Service Unavailable

Right Answer:
API testing is the process of verifying that an application programming interface (API) functions as expected, ensuring it meets the requirements for functionality, reliability, performance, and security. Tools that can be used for API testing include Postman, SoapUI, JMeter, RestAssured, and Swagger.

Right Answer:
REST (Representational State Transfer) is an architectural style that uses standard HTTP methods and is typically more lightweight and easier to use, while SOAP (Simple Object Access Protocol) is a protocol that relies on XML for message format and has strict standards for security and transactions. REST is generally more flexible and faster, while SOAP is more suited for enterprise-level services requiring high security and reliability.

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:
GUI Map files are used in automated testing to store the properties of graphical user interface (GUI) objects. Their contents typically include:

1. **Object Identification**: Unique identifiers for GUI elements (e.g., buttons, text fields).
2. **Properties**: Attributes of the GUI objects (e.g., name, type, location).
3. **Logical Names**: User-friendly names for objects to simplify test scripts.
4. **Coordinates**: Positioning information for GUI elements on the screen.

These files help the automation tool recognize and interact with the GUI elements during test execution.

Right Answer:
In real-time projects using LoadRunner, common frameworks include:

1. **Vuser Script Framework**: This framework organizes scripts into logical sections for better management and reusability.
2. **Parameterization Framework**: This allows for dynamic data handling by replacing hard-coded values with parameters.
3. **Correlation Framework**: This handles dynamic values returned by the server, ensuring that scripts can adapt to changing data.
4. **Error Handling Framework**: This framework captures and manages errors during test execution to improve reliability.

These frameworks help in creating efficient and maintainable performance testing scripts.

Right Answer:
Content analysis is a research method used to systematically analyze communication content, such as texts, speeches, or media, to identify patterns, themes, and meanings.

Right Answer:
The fields used for Project Planning in MS Project include:

1. Task Name
2. Duration
3. Start Date
4. Finish Date
5. Predecessors
6. Resources
7. Percent Complete
8. Work
9. Cost
10. Milestones

Right Answer:
To analyze data for different formats like pivot tables and matching datasets, you should:

1. **Identify Key Variables**: Determine the key fields that will be used for matching and pivoting.
2. **Clean the Data**: Ensure that the data is free from duplicates, errors, and inconsistencies.
3. **Use Pivot Tables**: Create pivot tables to summarize and analyze the data by aggregating values based on categories.
4. **Match Data**: Use functions like VLOOKUP or JOIN operations in SQL to match data from different sources based on the identified key variables.
5. **Validate Results**: Check the accuracy of the matched data and the pivot table outputs to ensure they meet business requirements.

Right Answer:
Working capital is the difference between a company's current assets and current liabilities, indicating the short-term financial health and operational efficiency of the business.