Lecture 3: SOAP, REST & FaaS Flashcards
1
Q
SOAP
A
- Transmitting information (relies on XML)
- Light weight
- Extensible
- Allows security, routing and reliability
- Interoperable
- Independent (any programming language allowed, any number of message exchange patterns (MEPs))
2
Q
What is WSDL in one sentence?
A
- Interface description (describing functionality of web service)
3
Q
SOAP Message Format
A
- SOAP Envelope
- SOAP Header
- SOAP Body
4
Q
WSDL describes:
A
- What a service’s interface looks like
- How a service is accessed
- Where a service is located
- Contract between provider and consumer of service
5
Q
WSDL does not describe:
A
Computations and semantics
6
Q
WSDL Characteristics
A
- Platform- and language- independence
- Schema validated
- Division of interface description and technical details
7
Q
REST stands for:
A
Representational State Transfer
8
Q
Why is WSDL outdated?
A
- Popularity of REST
- Easiness of REST
9
Q
REST Elements
A
- Components (client, service)
- Connectors (HTTP, request/reply)
- Data (resources, representations)
10
Q
REST Design Decisions
A
- Ignores component implementation details.
- Focus on the roles of the components, their interactions and their interpretation of data elements.
11
Q
Core data elements in REST:
A
- Resource
- URI (Uniform Resource Identifier)
- Representational (HTML webpage)
12
Q
Core actions REST
A
- Create: HTTP POST
- Retrieve: HTTP GET
- Update: HTTP PUT
- Delete : HTTP DELETE
13
Q
REST Characteristics
A
- Cache
- Stateless
- Pull-based interaction style
- Named resources
- Interconnected resource representations
- 4 HTTP methods
14
Q
REST vs WS-*
A
- REST is more lightweight, more scalable, and more easy to integrate on the web
- SOAP & WSDL are better for security and for integrating enterprise information systems
15
Q
FaaS
A
- Stateless
- Triggered by event
- Auto-scalable
- Serverless computing
