Deck 28: Web Services in Java

Question 1

Using a web service from a client application is known as ________ a web service.

A) accessing.
B) serving.
C) consuming.
D) publishing.

Answer 1

C

Question 2

A Java client application can consume a web service by adding a ________ to the application, which defines the proxy class that allows the client to access the web service.

A) client reference
B) web client reference.
C) web service client.
D) web service reference.

Answer 2

D

Question 3

The ________ annotation indicates that a class represents a web service.

A) @WebService.
B) @WebMethod.
C) @WebParam.
D) None of the above.

Answer 3

A

Question 4

The ________ annotation indicates the names of a method's parameters that will be exposed to a client calling one of the web service's methods.

A) @WebService.
B) @WebMethod.
C) @WebParam.
D) None of the above.

Question 5

The ________ annotation indicates the URI for accessing the web service.

A) @Location.
B) @URI.
C) @Path.
D) @URL.

Question 6

Each request and response is packaged in a ________ (also known as a ________)-an XML "wrapper" containing the information that a web service requires to process the message.

A) SOAP message, SOAP envelope.
B) message, envelope.
C) SOAP message, SOAP package.
D) None of the above.

Question 7

Each new web service class created with the JAX-WS APIs is a ________- you do not need to extend a class or implement an interface to create a Web service.

A) Class.
B) Object.
C) POJO.
D) None of the above.

Question 8

Each method in a RESTful web service is identified by a unique ________.

A) URL.
B) data format.
C) HTTP method (GET, POST, etc.).
D) cache.

Question 9

To create a web service in NetBeans, you first create a project of type________.

A) Web Service Application.
B) Web Application.
C) Service Application.
D) Web Service.

Question 10

The ________ annotation indicates that a method can be called remotely.

A) @WebService.
B) @WebMethod.
C) @WebParam.
D) None of the above.

Question 11

________ is an XML-based protocol that allows web services and clients to communicate, even if the client and the web service are written in different languages.

A) SOAP.
B) REST.
C) TCP.
D) UDP.

Question 12

To convert a POJO to XML, use the ________ method of the javax.xml.bind.JAXB class.

A) serialize.
B) convert.
C) convertToXML.
D) marshal.

Question 13

The protocol that transmits request-and-response messages is known as the web service's ________ or ________.

A) format, protocol.
B) wire format, wire protocol.
C) web format, web protocol.
D) None of the above.

Question 14

Making a web service available to receive client requests is known as ________ a web service.

A) accessing.
B) serving.
C) consuming.
D) publishing.

Question 15

JSON does not have a built-in way to represent ________.

A) strings.
B) arrays.
C) dates.
D) objects.

Question 16

To bind URL parameters to method parameters, use the ________ annotation.

A) @PathParam.
B) @marshal.
C) @Produces.
D) @BindParam.

Question 17

A ________ is a software component stored on one computer that can be accessed via method calls by an application (or other software component) on another computer over a network.

A) web method.
B) web service.
C) web object.
D) None of the above.

Question 18

REST returns data in the ________ format.

A) XML.
B) plain text.
C) HTML.
D) all of the above.

Question 19

The computer on which a web service resides is referred to as a ________.

A) server.
B) client.
C) web service host.
D) service repository.

Question 20

JAX-WS uses ________ to describe web services in a platform-independent manner.

A) XML.
B) SOAP.
C) WSDL.
D) HTML.

Question 21

The ________ annotation enables session tracking in a web service.

A) @SessionScoped.
B) @HttpSessionScope.
C) @HttpSession.
D) None of the above.

Question 22

To retrieve data from a URL, create a URL object and then call its ________ method.

A) getData.
B) openStream.
C) getReader.
D) openReader.

Question 23

Which of the following is true

A) Only desktop applications can consume web services.
B) Only web applications can consume web services.
C) Desktop and web applications can both consume web services.
D) A web service client must be written in the same programming language

Question 24

For an object to be serialized and unserialized, what must be true about the class definitions on the server and client

A) They must have identical definitions, with the same class name and package.
B) The class names and definitions must match, but the packages may differ.
C) The class definitions must match, but the class name and package may differ.
D) The classes must have the same set of public properties, but the classes may have additional methods that differ and class name and package do not matter.

Question 25

The top level of a JSON text cannot be a(n) ________.

A) number.
B) object.
C) string.
D) both a and c.

Question 26

A ________ enables the client to manipulate the request information that will be sent to the server when invoking a web service method.

A) WebServiceProvider.
B) Provider.
C) Binder.
D) BindingProvider.

Question 27

The unmarshal method of the JAXB class takes ________.

A) a String indicating the URL or path of the XML document and a Class< T > indicating the class to convert to.
B) an InputStream indicating the URL or path of the XML document and an object of the appropriate class to store the data.
C) a Reader indicating the URL or path of the XML document; JAXB determines the type of the object from the XML data.
D) a Scanner containing the XML document and a Class< T > indicating the class to convert to.