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Is it possible to create “instances” (another objects) from the component “Ext.Ajax”?

• Yes, for every request we need to create an instance.
• No, because is a Singleton
• Yes, because otherwise you cannot make any request.
• I don’t know

What is the best way to send parameters to the server using the component “Ext.Ajax”?

• Adding the parameters to the URL like this: servlet.do?param1=23&param2=10
• Using the property “params” in the configuration.
• You cannot send parameters to the server.

What kind of information accepts the “params” property?

• A JavaScript objects with the parameters that are going to be sent: {param: ‘value’}
• A String with the parameters: “param=value&param2=10”
• A function that returns the parameters: function(){ return “param=2&param2=10”;}
• All of the above.

What are the “http methods” we can use to send requests to the server?

• GET and POST.
• Only GET.
• GET, POST, PUT and DELETE.
• Only POST.

When is the function configured in the property “success” executed?

• When the server returns the information correctly with the “status” 200.
• When an error hasn’t happened in the communication.
• The function is always executed.

When is the function configured in the property “failure” executed?

• When the server sends the status 404.
• When the server returns the status 403.
• When there was an error 500.
• When there was an error in the server or in the connection and it doesn’t return the “status” 200.

What is a Store?

• Is a component that that saves temporarily the information through records, it is also used as cache.
• Is a database hosted in the server.
• Is an array where the records are saved when we browse an application.
• Is a component capable of interpreting any amount of information and display it in the screen.

What is the component the store needs to interpret the information it receives?

• A “Ext.data.XmlReader” that handles the information correctly.
• A “Ext.data.Reader” that handles any kind of information.
• An implementation of the abstract component “Ext.data.DataReader” in the desired format (XmlReader, JsonReader, ArrayReader).
• Only an “Ext.data.JsonReader”.

To load local information stored in an array into the “store”, what method we use?

• Store.load()
• Store.loadData(array)
• Store.loadArray(array)
• Store.load(array)

If we need to send additional parameters to the server using a “Store”, how do we do that?

• Store.load({param1:’value’,param2:’value’});
• Store.load(“params1=value&param2=value”);
• Store.load({params:{param1:’value’,param2=’value’}});
• Store.loadData({params “params1=value&param2=value”});

Given the following code, what is displayed in the Firebug console? (just suppose there’s a valid record for the search criteria given).

var result = store.find(‘name’, ‘crysfel’);
console.debug(result);

• Displays all the fields from the record found.(lastname, age, etc.).
• Displays the index where the record is found
• Displays an array with the records found for this search criteria.
• Displays the word “crysfel”.

What is the result after executing the following code?

var collection = store.queryBy(function(record,id){
	return record.get('age') >20 && record.get('age')<30;
});

• The variable "collection" contains the records that are not between 20 and 30.
• The variable “collection” contains all the records where the property “age” is from 20 to 30.
• The variable “collection” contains all the records where the property “age” is from 21 to 29.
• The variable “collection” contains a “true” or “false” depending if the records exist according to the search criteria.