Q 1 - Que signifie GWT?

A - Grande boîte à outils Web

B - Boîte à outils Web Google

C - Outil Web Google

D - Aucune de ces réponses.

Réponse: B

Explication

GWT signifie Google Web Toolkit.

Q 2 - Lequel des énoncés suivants est correct à propos de GWT?

R - Google Web Toolkit (GWT) est une boîte à outils de développement pour créer une application Internet RICHE (RIA).

B - GWT fournit aux développeurs la possibilité d'écrire une application côté client en JAVA.

C - GWT compile le code écrit en JAVA en code JavaScript.

D - Tout ce qui précède.

Réponse: D

Explication

Toutes les options ci-dessus sont correctes.

Q 3 - Lequel des énoncés suivants est correct à propos de GWT?

R - L'application écrite en GWT est compatible avec tous les navigateurs.

B - GWT génère automatiquement du code javascript adapté à chaque navigateur.

C - GWT est open source et est sous licence Apache License version 2.0.

D - Tout ce qui précède.

Réponse: D

Explication

Toutes les options ci-dessus sont correctes.

Q 4 - Lequel des énoncés suivants est correct à propos de GWT?

R - GWT offre une capacité de débogage complète. Les développeurs peuvent déboguer l'application côté client comme une application Java.

B - GWT permet une intégration facile avec Junit et Maven.

C - GWT fournit une bibliothèque de widgets qui fournit la plupart des tâches requises dans une application.

D - Tout ce qui précède.

Réponse: D

Explication

Toutes les options ci-dessus sont correctes.

Q 5 - Laquelle des affirmations suivantes est vraie à propos de GWT?

R - GWT est extensible et un widget personnalisé peut être créé pour répondre aux besoins des applications.

B - Les applications GWT peuvent fonctionner sur tous les principaux navigateurs et téléphones intelligents, y compris les téléphones / tablettes Android et iOS.

C - Les deux ci-dessus

D - Aucune de ces réponses.

Réponse: C

Explication

Les deux options ci-dessus sont correctes.

Q 6 - Lequel des énoncés suivants est correct à propos de GWT?

R - GWT est extensible et un widget personnalisé peut être créé pour répondre aux besoins des applications.

B - Les applications GWT peuvent fonctionner sur tous les principaux navigateurs et téléphones intelligents, y compris les téléphones / tablettes Android et iOS.

C - Les deux ci-dessus

D - Aucune de ces réponses.

Réponse: C

Explication

Les deux options ci-dessus sont correctes.

Q 7 - Lequel des énoncés suivants décrit correctement l'inconvénient du GWT?

R - Non indexable: les pages Web générées par GWT ne seraient pas indexées par les moteurs de recherche car ces applications sont générées dynamiquement.

B - Non dégradable: Si l'utilisateur de votre application désactive Javascript, l'utilisateur verra simplement la page de base et rien de plus.

C - Les deux ci-dessus

D - Aucune de ces réponses.

Réponse: C

Explication

Les deux options ci-dessus sont correctes.

Q 8 - Lequel des éléments suivants n'est pas un élément central du cadre GWT?

A - Compilateur GWT Java vers JavaScript

B - Bibliothèque d'émulation JRE

C - Bibliothèque de construction de l'interface utilisateur GWT

D - Navigateur Web

Réponse: D

Explication

Le navigateur Web n'est pas un composant essentiel du framework GWT.

Q 9 - Lequel des éléments suivants n'est pas un élément obligatoire de l'application GWT?

A - Descripteurs de module

B - Ressources publiques

C - Server-side code

D - Client-side code

Answer : C

Explaination

Server-side code is a optional part of a GWT application.

Q 10 - Which of the following is correct about module descriptors in GWT application?

A - A module descriptor is the configuration file in the form of XML which is used to configure a GWT application.

B - A module descriptor file extension is *.gwt.xml.

C - * in *.gwt.xml is the name of the application and this file should reside in the project's root.

D - All of the above.

Answer : D

Explaination

All of the above options are correct.

Q 11 - What is the purpose of 'module' tag in *.gwt.xml file in GWT?

A - This provides name of the application.

B - This adds other gwt module in application just like import does in java applications. Any number of modules can be inherited in this manner.

C - This specifies the name of class which will start loading the GWT Application.

D - None of the above.

Answer : A

Explaination

'module' tag in *.gwt.xml file provides name of the application.

Q 12 - What is the purpose of 'inherits' tag in *.gwt.xml file in GWT?

A - This provides name of the application.

B - This adds other gwt module in application just like import does in java applications. Any number of modules can be inherited in this manner.

C - This specifies the name of class which will start loading the GWT Application.

D - None of the above.

Answer : B

Explaination

'inherits' tag in *.gwt.xml file adds other gwt module in application just like import does in java applications. Any number of modules can be inherited in this manner.

Q 13 - What is the purpose of 'entry-point' tag in *.gwt.xml file in GWT?

A - This provides name of the application.

B - This adds other gwt module in application just like import does in java applications. Any number of modules can be inherited in this manner.

C - This specifies the name of class which will start loading the GWT Application.

D - None of the above.

Answer : C

Explaination

'entry-point' tag in *.gwt.xml file specifies the name of class which will start loading the GWT Application.

Q 14 - Can you have multiple entry-point classes in a *.gwt.xml file?

A - true

B - false

Answer : A

Explaination

Yes! Any number of entry-point classes can be added.

Q 15 - Which method of a entry-point class is called when GWT application starts?

A - main()

B - onModuleLoad()

C - process()

D - execute()

Answer : B

Explaination

onModuleLoad() function gets called and acts similar to main method of a java application.

Q 16 - What is the purpose of 'source' tag in *.gwt.xml file in GWT?

A - This specifies the names of source folders which GWT compiler will search for source compilation.

B - This specifies the place in your project where static resources referenced by your GWT module, such as CSS or images, are stored.

C - This automatically injects the external JavaScript file located at the location specified by src.

D - This automatically injects the external CSS file located at the location specified by src.

Answer : A

Explaination

'source' tag in *.gwt.xml file specifies the names of source folders which GWT compiler will search for source compilation.

Q 17 - What is the purpose of 'public' tag in *.gwt.xml file in GWT?

A - This specifies the names of source folders which GWT compiler will search for source compilation.

B - This specifies the place in your project where static resources referenced by your GWT module, such as CSS or images, are stored.

C - This automatically injects the external JavaScript file located at the location specified by src.

D - This automatically injects the external CSS file located at the location specified by src.

Answer : B

Explaination

'public' tag in *.gwt.xml file specifies the place in your project where static resources referenced by your GWT module, such as CSS or images, are stored.

Q 18 - What is the purpose of 'script' tag in *.gwt.xml file in GWT?

A - This specifies the names of source folders which GWT compiler will search for source compilation.

B - This specifies the place in your project where static resources referenced by your GWT module, such as CSS or images, are stored.

C - This automatically injects the external JavaScript file located at the location specified by src.

D - This automatically injects the external CSS file located at the location specified by src.

Answer : C

Explaination

'script' tag in *.gwt.xml file automatically injects the external JavaScript file located at the location specified by src.

Q 19 - What is the purpose of 'stylesheet' tag in *.gwt.xml file in GWT?

A - This specifies the names of source folders which GWT compiler will search for source compilation.

B - This specifies the place in your project where static resources referenced by your GWT module, such as CSS or images, are stored.

C - This automatically injects the external JavaScript file located at the location specified by src.

D - This automatically injects the external CSS file located at the location specified by src.

Answer : D

Explaination

'stylesheet' tag in *.gwt.xml file automatically injects the external CSS file located at the location specified by src.

Q 20 - What is default public path for static resources in GWT application?

A - public subdirectory underneath where the Module XML File is stored.

B - public subdirectory underneath where the client source files are stored.

C - public subdirectory underneath where the server source files are stored.

D - None of the above.

Answer : A

Explaination

The default public path is the public subdirectory underneath where the Module XML File is stored.

Q 21 - Which of the following is correct about entry-point class?

A - A entry-point is any class that is assignable to EntryPoint and that can be constructed without parameters.

B - When a module is loaded, every entry point class is instantiated and its EntryPoint.onModuleLoad() method gets called.

C - Both of the above.

D - None of the above.

Answer : C

Explaination

A module entry-point is any class that is assignable to EntryPoint and that can be constructed without parameters. When a module is loaded, every entry point class is instantiated and its EntryPoint.onModuleLoad() method gets called.

Q 22 - What is *.nocache.js file in GWT?

A - It contains the javascript code required to resolve deferred binding configuarations.

B - It contains the javascript code to use lookup table generated by GWT compiler to locate one of the .cache.html.

C - Both of the above.

D - None of the above.

Answer : C

Explaination

*.nocache.js file contains the javascript code required to resolve deferred binding configuarations (for example, browser detection) and to use lookup table generated by GWT compiler to locate one of the .cache.html.

Q 23 - What is *.cache.html file in GWT?

A - It contains the actual program of a GWT application.

B - It contains the actual program of a GWT framework.

C - Both of the above.

D - None of the above.

Answer : A

Explaination

*.cache.html contains the actual program of a GWT application.

Q 24 - Which of the following is true about bootstrap procedure of a GWT Application?

A - Browser loads the host html page and .nocache.js file.

B - .nocache.js code resolves deferred binding configuarations (for example, browser detection) and use lookup table generated by GWT compiler to locate one of the .cache.html.

C - .nocache.js code then creates a html hidden iframe, inserts that iframe into the host page's DOM, and loads the .cache.html file into the same iframe.

D - All of the above.

Answer : D

Explaination

All of the above options are correct.

Q 25 - Why should a .nocache.js file never be cached?

A - GWT compiler generates .nocache.js file every time with the same name whenever a GWT application is compiled.

B - browser should always download the .nocache.js file to get the latest gwt application.

C - Both of the above.

D - None of the above.

Answer : C

Explaination

GWT compiler generates .nocache.js file every time with the same name whenever a GWT application is compiled. So browser should always download the .nocache.js file to get the latest gwt application. gwt.js code actually appends a unique timestamp at the end of the file name so that browser always treat it a new file and should never cache it.