DEX-450試験無料問題集（202題）「Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience 認定」

出題：1

A developer created a trigger on the Account object. While testing the trigger, the developer sees the error message 'Maximum trigger depth exceeded'.
What could be the possible causes?

A. The trigger does not have sufficient code coverage.

B. The trigger is too long and should be refactored into a helper class.

C. The trigger is getting executed multiple times.

D. The developer does not have the correct user permission.

正解：C 解答を投票する

出題：2

Cloud Kicks Fitness, an ISV Salesforce partner, is developing a managed package application. One of the application modules allows the user to calculate body fat using the Apex class, Bodyfat, and its method, calculateBodyFat (). The product owner wants to ensure this method is accessible by the consumer of the application when developing customizations outside the ISV's package namespace.
Which approach should a developer take to ensure calculateBodyFat () is accessible outside the package namespace?

A. Declare the class and method using the public access modifier.

B. Declare the class and method using the global access modifier.

C. Declare the class as global and use the public access modifier on the method.

D. Declare the class as public and use the global access modifier on the method.

正解：B 解答を投票する

出題：3

A developer is implementing an Apex class for a financial system. Within the class, the variables 'creditAmount' and 'debitAmount' should not be able to change once a value is assigned.
In which two ways can the developer declare the variables to ensure their value can only be assigned one time?
Choose 2 answers

A. Use the final keyword and assign its value when declaring the variable.

B. Use the static keyword and assign its value in a static initializer.

C. Use the final keyword and assign its value in the class constructor.

D. Use the static keyword and assign its value in the class constructor.

正解：A,C 解答を投票する

出題：4

A developer must perform a complex SOQL query that joins two objects in a Lightning component.
How can the Lightning component execute the query?

A. Write the query in a custom Lightning web component wrapper and invoke from the Lightning component.

B. Invoke an Apex class with the method annotated as @AuraEnabled to perform the query.

C. Create a flow to execute the query end invoke from the Lightning component.

D. Use the Salesforce Streaming APL to perform the SOQL query.

正解：A 解答を投票する

出題：5

What is an example of a polymorphic lookup field in Salesforce?

A. The Whatld field on the standard Event object

B. The Parentid field on the standard Account object

C. A custom field, Link__c, on the standard Contact object that looks up to an Account or a Campaign

D. The LeadId and Contactid fields on the standard Campaign Member object

正解：A 解答を投票する

出題：6

A developer is creating a page that allows users to create multiple Opportunities. The developer is asked to verify the current user's default Opportunity record type, and set certain default values based on the record type before inserting the record.
How can the developer find the current user's default record type?

A. Use opportunity. sobjectTyps. getDeacribse().getRecordTypeInfos {) to get a list of record types, and iterate through them until isDefaultRecordtypeMapping {) is true.

B. Query the Profile where the ID equals userinfo.getprofileID () and then use the profile opportunity. getdefaultresoratype (} method,

C. Create the opportunity and check the opportunity. recordtype, which will have the record ID of the current user's default record type, before inserting.

D. Use the schema. Userinfo. Opportunity. getDefaultRecordType {) method.

正解：A 解答を投票する

出題：7

A developer is migrating a Visualforce page into a Lightning web component.
The Visualforce page shows information about a single record. The developer decides to use Lightning Data Service to access record data.
Which security consideration should the developer be aware of?

A. Lightning Data Service handles sharing rules and field-level security.

B. The with sharing keyword must be used to enforce sharing rules.

C. Lightning Data Service ignores field-level security.

D. The isAccessible () method must be used for field-level access checks.

正解：A 解答を投票する

出題：8

When the code executes, a DML exception is thrown.
How should a developer modify the code to ensure exceptions are handled gracefully?

A. Remove null items from the list of Accounts.

B. Implement the upset DML statement.

C. Implement a try/catch block for the DML.

D. Implement Change Data Capture.

正解：C 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：9

What are two benefits of using declarative customizations over code?
Choose 2 answer

A. Declarative customizations automatically update with each Salesforce release.

B. Declarative customizations automatically generate test classes.

C. Declarative customizations generally require less maintenance

D. Declarative customizations cannot generate run time errors

正解：A,C 解答を投票する

出題：10

A developer created this Apex trigger that calls MyClass.mystaticMethod:

The developer creates a test class with a test method that calls MyClass.myStaticMethod directly, resulting in 81% overall code coverage What happens when the developer tries to deploy the trigger and two classes to production, assuming no other code exists?

A. The deployment passes because both classes and the trigger were included in the deployment.

B. The deployment passes because the Apex code has the required >75% code coverage.

C. The deployment fails because the Apex trigger has no code coverage.

D. The deployment fails because no assertions were made in the test method.

正解：C 解答を投票する

DEX-450試験無料問題集「Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience 認定」