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Exam Name: IBM Worklight Foundation V6.2, Mobile Application Development
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Last Update: 2016-11-15
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NO.1 An application developer needs to invoke Android native code from Javascript using Apache
Cordova API.
Which method signature should the application developer use?
A. cordova.exec(Plug-inName, ActionName, FailureCallback, SuccessCallback, Parameters);
B. cordova.exec(SuccessCallback, FailureCallback, Plug-inName, ActionName, Parameters);
C. cordova.exec(Plug-inName, ActionName, SuccessCallback, FailureCallback, Parameters);
D. cordova.exec(FailureCallback, SuccessCallback, Plug-inName, ActionName, Parameters);
Answer: B
C5050-408 environment
Explanation:
Here is an example:
cordova.exec(function(winParam) {}, function(error) {}, "service",
"action", ["firstArgument", "secondArgument", 42, false]);
The parameters explained in more detail:
- function(winParam) {} - Success function callback. Assuming your exec call completes successfully
, thisfunction will be invoked (optionally with any parameters you pass back to it)
- function(error) {} - Error function callback. If the operation does not complete successfully, thi
s function willbe invoked (optionally with an error parameter) - "service" - The service name to cal
l into on the native side. This will be mapped to a native class. More onthis in the native guides below
- "action" - The action name to call into. This is picked up by the native class receiving the exec call
, and,depending on the platform, essentially maps to a class's method. - [/* arguments */]
- Arguments to get passed into the native environment
References: http://docs.phonegap.com/en/2.3.0/guide_plugin-development_index.md.html
NO.2 An application developer is using JSONStore in a mobile application to store purchase orders.
The application allows sellers to modify the status of an order. The JSONStore collection for the
orders is defined in a global variable as follows: var ordCollection = { orders: {
searchFields: {ord_number: 'integer', status: 'string' }
}
};
Which of the following JavaScript functions can the application developer use to change the status of
an order in the local JSONStore?
A. var updateOrder = function(orderDoc, newStatus){ orderDoc.json.status = newStatus;
var ordColInstance = WL.JSONStore.get('orders');
var numberOfDocumentsReplaced = ordColInsnance.replace(orderDoc); if(
numberOfDocumentsReplaced >= 0 ){
// Handle Success
} else {
// Handle Failure
}
};
B. var updateOrder = function(orderDoc, newStatus){ orderDoc.json.status = newStatus;
WL.JSONStore.update(ordCollection, orderDoc) .then(function
(numberOfDocumentsUpdated) { // Handle success. })fail(function (errorObject) { // Handle
failure.
});
};
C. var updateOrder = function(orderDoc, newStatus){ orderDoc.json.status = newStatus;
WL.JSONStore.get('orders').replace(orderDoc) .then(function
(numberOfDocumentsReplaced) { // Handle success. })fail(function (errorObject) { // Handle
failure.
});
};
D. var updateOrder = function(orderDoc, newStatus){ orderDoc.json.status = newStatus;
var ordColInstance = WL.JSONStore.get(ordCollection);
var numberOfDocumentsUpdated = ordColInsnance.update(orderDoc); if(
numberOfDocumentsUpdated >= 0 ){
// Handle Success
} else {
// Handle Failure
}
};
Answer: D
C5050-408 high
Explanation:
WL.JSONStore.get(collectionName)
Provides an accessor to the collection if the collection exists, otherwise it returns
undefined.
Must reference OrdCOllection in the Get statement.
References:
https://www.ibm.com/support/knowledgecenter/SSHS8R_6.3.0/com.ibm.worklight.apiref.do
c/html/refjavascriptclient/html/WL.JSONStore.html
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