Free Salesforce Platform Developer II Exam Dumps

The optimal technique for the developer to troubleshoot this issue is to add system.debug() statements to the code and use the Developer Console logs to trace the code. system.debug() is a method that prints a message to the debug log, which is a tool that captures information about the execution of the code. The Developer Console is an integrated development environment that allows the developer to access and analyze the debug logs. By adding system.debug() statements to the code, the developer can print the values of variables, the execution flow, and the errors and exceptions that occur during the trigger execution. By using the Developer Console logs, the developer can view and filter the debug messages and identify the cause of the issue. This way, the developer can troubleshoot the issue effectively and efficiently .Reference: [system.debug Method], [Debug Logs], [Developer Console]

The technique that the developer should implement to ensure the query performs optimally, while preserving the entire result set, is to break down the query into two individual queries and join the two result sets. This is because the query in the code snippet is using a complex filter condition that combines the CreatedDate and RecordType fields, which are not indexed by default. This means that the query will perform a full table scan on the Account object, which can be very slow and inefficient when the data volume is large. To avoid this, the developer can split the query into two queries, one that filters by the CreatedDate field and another that filters by the RecordType field. Then, the developer can use a Set or a Map to store the Ids of the Accounts that match both criteria, and use the Set or the Map to retrieve the Account records from the database. This way, the query will use the standard indexes on the Id, CreatedDate, and RecordType fields, and perform faster and more efficiently.

To make the component perform faster, the developer should change the default for showContactInfo to false. The showContactInfo attribute is used to control whether the contactInfo component is rendered or not. By default, it is set to true, which means that the contactInfo component is always rendered, even if the user does not need to see it. This can slow down the component loading, as the contactInfo component may have some complex logic or data fetching in its controller or helper. By changing the default for showContactInfo to false, the developer can improve the component performance, as the contactInfo component will only be rendered when the user clicks on the Show Contact Info button, which triggers the toggleContactInfo function and sets the showContactInfo attribute to true. Changing the type of contactInfo to ''Map'' would not make the component perform faster, as contactInfo is not a variable, but a component name. A Map is a collection type that stores key-value pairs, and it is not related to the component rendering. Moving the contents of <c:contactInfo> into the component would not make the component perform faster, as it would not change the logic or data fetching of the contactInfo component. It would only make the component code less modular and reusable. Adding a change event handler for showContactInfo would not make the component perform faster, as it would not change the rendering of the contactInfo component. It would only add an extra function that is executed whenever the showContactInfo attribute changes, which may not be necessary for the component functionality.Reference: [Create and Use Attributes], [Render Components Conditionally]

The developer should implement the render attribute on theapex:commandButtontag to ensure that a partial refresh is made so that only the section identified with opportunity List is re-drawn on the screen. The render attribute specifies the ID of one or more components that are redrawn when the result of an AJAX update request returns to the client. The developer can use the render attribute to limit the scope of the refresh to theapex:pageBlockcomponent that contains the data table, and avoid refreshing the entire page. Enclosing the data table within theapex:actionRegiontag will not help, as theapex:actionRegiontag defines a section of a page that demarcates a form within a form, and allows the developer to limit the processing of form elements to the contents of the region. However, it does not affect the refresh of the page or the components. Ensuring the action method search returns null will not help, as it will only prevent the page from reloading, but it will not refresh the data table with the new search results. Implementing theapex:actionFunctiontag with immediate = true will not help, as theapex:actionFunctiontag defines a JavaScript function that can invoke a controller action method, and the immediate attribute specifies whether the action method is executed immediately, without processing any validation rules. However, it does not affect the refresh of the page or the components.Reference: [apex:commandButton], [apex:actionRegion], [apex:actionFunction], [Visualforce Developer Guide]

The two changes that the developer should make in this trigger to adhere to best practices are to move the Region__c query to outside the loop and to remove the last line updating accountList as it is not needed. Moving the Region__c query to outside the loop avoids the SOQL query limit, as it reduces the number of queries from one per Account record to one for all Account records. The developer can use a Map to store the Region__c records by Name, and then use the Map to assign the OwnerId for each Account record. Removing the last line updating accountList as it is not needed avoids the DML statement limit, as it is redundant to update the records that are already in the trigger context. The developer can use the Trigger.new list to modify the Account records, and the changes will be saved automatically after the trigger execution. Using a Map to cache the results of the Region__c query by Id is not a valid answer, as it does not move the query outside the loop, and it does not match the Name field of the Account record. Using a Map accountMap instead of List accountList is not a valid answer, as it does not affect the query or the DML limits, and it does not change the logic of the trigger.Reference: [Apex Triggers], [Apex Best Practices], [Apex Developer Guide]

The code snippet that should be added to the setup for the unit test to create the controller extension for the test is option A. This code snippet creates a PageReference object that points to the Visualforce page that uses the controller extension. Then, it sets the current page reference to the PageReference object and passes the Account ID as a URL parameter. Finally, it creates an instance of the controller extension by passing the standard controller as an argument. The code snippet in option B will not work because it does not set the current page reference or pass the Account ID as a URL parameter. The code snippet in option C will not work because it does not create a PageReference object or set the current page reference.Reference: [Testing Custom Controllers and Controller Extensions], [PageReference Class], [ApexPages Class]

The true statement regarding savepoints is that static variables are not reverted during a rollback. Savepoints are used to mark a point in the transaction that can be rolled back to if an error occurs. However, static variables are not affected by the rollback, as they retain their values throughout the transaction. The other statements are false, as savepoints must be rolled back in the reverse order of their creation, savepoints cannot cross trigger invocations, and savepoints are counted as DML statements and are subject to the governor limits.Reference: [Savepoints and Rollbacks], [Apex Developer Guide]