When considering mobile application development, why might GraphQL be preferred over REST?
- Better support for offline capabilities
- Faster data transfer with smaller payloads
- Reduced over-fetching, leading to optimized performance
- Simplicity in handling complex queries
GraphQL allows for reduced over-fetching, optimizing performance especially in mobile environments with limited bandwidth.
_______ is a security principle that involves validating and sanitizing user inputs.
- Authentication
- Authorization
- Encryption
- Input Validation
Input validation is a security principle that involves validating and sanitizing user inputs to prevent security vulnerabilities.
Which element in a WSDL file defines the data types used by the web service?
The element in a WSDL file is used to define the data types that will be used by the web service, specifying the structure of the input and output messages.
When considering caching mechanisms, which approach is generally more efficient in REST compared to SOAP?
- Both REST and SOAP have similar caching efficiency
- Caching is not applicable in either REST or SOAP
- REST is generally more efficient in caching due to statelessness
- SOAP provides better caching mechanisms due to its structure
REST is typically more efficient in caching due to its stateless nature. Stateless communication allows for easier caching implementation as each request from a client to a server is independent, reducing complexity and enhancing caching efficiency in distributed systems.
REST APIs typically return data in _______ format, while GraphQL can be more flexible.
- HTML
- JSON
- XML
- YAML
REST APIs commonly return data in JSON format, whereas GraphQL provides more flexibility in the format of returned data.
When integrating web services with legacy systems, which data format might be preferred and why?
- JSON
- SOAP
- XML
- YAML
When integrating with legacy systems, XML might be preferred due to its rich schema definition and strong data typing. XML allows for precise data representation, which is crucial for interoperability and compatibility with existing systems that may rely on specific data structures.
The concept of _______ in GraphQL allows for real-time data updates, unlike typical REST APIs.
- Notifications
- Observers
- Subscriptions
- Transactions
GraphQL introduces the concept of subscriptions, enabling real-time data updates, a feature not inherent in traditional REST APIs.
In a scenario where a web service needs to integrate with multiple third-party services, what architectural style is most effective?
- Event-Driven Architecture
- Microservices architecture
- Monolithic architecture
- Service-Oriented Architecture (SOA)
Microservices architecture is most effective for integrating with multiple third-party services, providing flexibility and modularity.
OAuth is commonly used for what aspect of web service security?
- Authentication
- Authorization
- Encryption
- Session management
OAuth is commonly used for authorization in web service security. It allows secure and controlled access to resources by enabling a token-based authentication mechanism. OAuth is widely employed in scenarios where third-party applications require limited access to a user's resources without exposing sensitive credentials.
A company is transitioning to SOA to improve IT and business alignment. What should be their primary focus in the initial phase?
- Enhancing user interfaces
- Expanding hardware infrastructure
- Identifying key services and their dependencies
- Implementing a new database system
In the initial phase of transitioning to SOA, the primary focus should be on identifying key services and their dependencies. This helps establish a clear understanding of the existing landscape and lays the foundation for a well-organized and effective SOA implementation.