[2024年05月22日] 無料Salesforce Developer DEX-450公式認定ガイドPDFダウンロード
Salesforce DEX-450公式認定ガイドPDF
質問 # 21
A developer has the following class and trigger code public class insurancerates{ public static final decimal smokercharge = 0.01; } trigger contacttrigger on contact (before insert){ insurancerates rates = new insurancerates(); decimal basecost=xxx; } Which code segment should a developer insert at the xxx to set the basecost variable to the value of the class variable smokercharge?
- A. Rates.getsmokercharge()
- B. Rates.smokercharge
- C. Insurancerates.smokercharge
- D. Contacttrigger.insurancerates.smokercharge
正解：C
質問 # 22
How should a developer prevent a recursive trigger?
- A. Use a static Boolean variable.
- B. Use a private Boolean variable.
- C. Use a "one trigger per object" pattern.
- D. Use a trigger handler.
正解：B
質問 # 23
Which action causes a before trigger to fire by default for Accounts?
- A. Converting Leads to Contact accounts
- B. Importing data using the Data Loader and the Bulk API
- C. Updating addresses using the Mass Address update tool
- D. Renaming or replacing picklist
正解：B
質問 # 24
In a single record, a user selects multiple values from a multi-select picklist.
How are the selected values represented in Apex?
- A. As a String with each value separated by a semicolon
- B. As a String with each value separated by a comma
- C. As a Set<String> with each value as an element in the set
- D. As a List<String> with each value as an element in the list
正解：A
質問 # 25
A Lightning component has a wired property, searchResults, that stores a list of Opportunities. Which definition of the Apex method, to which the searchResults property is wired, should be used?
- A. @AuraEnabled(cacheable=true) public List<Opportunity> search(String term) { /*implementation*/ }
- B. @AuraEnabled(cacheable=true)
public static List<Opportunity> search(String term) { /* implementation*/ } - C. @AuraEnabled(cacheable=false) public static List<Opportunity> search(String term) { /*implementation*/ }
- D. @AuraEnabled(cacheable=false) public List<Opportunity> search(String term) { /*implementation*/ }
正解：B
質問 # 26
For which three items can a trace flag be configured?
Choose 3 answers
- A. Apex Class
- B. Visualforce
- C. User
- D. Process Builder
- E. Apex Trigger
正解：A、C、E
質問 # 27
A developer needs to provide a way to mass edit,update, and delete records from a list view in which two ways can this be accomlpished? choose 2 answers
- A. Download a managed package from the appexchange that provides customizable enhanced list views and buttons
- B. Create a new visualforce page and apex controller for the list view that provides mass edit,update and delete functionality
- C. Configure the user interface and enable both inline editing enhanced lists
- D. Download an unmanaged package from the appexchange that provides customizable mass edit, update and delete functionality
正解：A、B
質問 # 28
A Lightning component has a wired property, searcResults, that stores a list of Opportunities. Which definition of the Apex method, to which the searchResults property is wired, should be used?
- A. @AuraEnabled(cacheable=true)
public List<Opportunity> search(String term) { /*implementation*/ } - B. @AuraEnabled(cacheable=true)
public static List<Opportunity> search(String term) { /* implementation*/ } - C. @AuraEnabled(cacheable=false)
public List<Opportunity> search(String term) { /*implementation*/ } - D. @AuraEnabled(cacheable=false)
public static List<Opportunity> search(String term) { /*implementation*/ }
正解：B
質問 # 29
Which three methods help ensure quality data?
- A. Sending an email alert using a workflow rule
- B. Adding a validation rule
- C. Handling an exception in Apex
- D. Adding an error to a field in before trigger
- E. Create a lookup filter
正解：A、B、E
質問 # 30
A developer has a single custom controller class that works with a Visualforce Wizard to support creating and editing multiple subjects. The wizard accepts data from user inputs across multiple Visualforce pages and from a parameter on the initial URL.
Which three statements are useful inside the unit test to effectively test the custom controller?
Choose 3 answers
- A. ApexPages.CurrentPage().getParameters().put('input\', 'TestValue');
- B. Test.setCurrentPage(pageRef);
- C. insert pageRef.
- D. public ExtendedController(ApexPages StandardController cntrl) { }
- E. String nextPage - controller.save().getUrl();
正解：A、B、E
質問 # 31
Given the following block code: try{ List <Accounts> retrievedRecords = [SELECT Id FROM Account WHERE Website = null]; }catch(Exception e){ //manage exception logic } What should a developer do to ensure the code execution is disrupted if the retrievedRecordslist remains empty after the SOQL query?
- A. Replace the retrievedRecords variable declaration from a List of Account to a single Account.
- B. Check the state of the retrievedRecords variable and access the first element of the list if the variable is empty.
- C. Check the state of the retrieveRecords variable and throw a custom exception if the variable is empty.
- D. Check the state of the retrievedRecords variable and use System.assert(false) if the variable is empty
正解：D
質問 # 32
A developer is debugging the following code to determinate why Accounts are not being created Account a = new Account(Name = 'A'); Database.insert(a, false); How should the code be altered to help debug the issue?
- A. Collect the insert method return value a Saveresult variable
- B. Add a try/catch around the insert method
- C. Add a System.debug() statement before the insert method
- D. Set the second insert method parameter to TRUE
正解：B
質問 # 33
Which exception type cannot be caught?
- A. LimitException
- B. NoAccessException
- C. Custom Exception
- D. CalloutException
正解：A
質問 # 34
A developer created a lightning component name accountList.cmp that display a list of Accounts. Client-side logic that is executed when a user hovers over an account in the list should be stored in which bundle member?
- A. AccountListHelper.js
- B. AccountListRenderer.js
- C. AccountList.renderer
- D. AccountList.helper
正解：C
質問 # 35
When a Task is created for a Contact, how can a developer prevent the task from being included on the Activity Timeline of the Contact's Account record?
- A. By default, tasks do not display on the Account Activity Timiline.
- B. In Activity Settings, uncheck Roll up activities to a contact's primary account.
- C. Use Process Builder to create a process to set the Task Account field to blank.
- D. Create a Task trigger to set the Account field to NULL
正解：B
質問 # 36
When a user edits the Postal Code on an Account, a custom Account text field named "Timezone" must be update based on the values in a PostalCodeToTimezone__c custom object. How should a developer implement this feature?
- A. Build an account Approval Process
- B. Build an Account Assignment Rule.
- C. Build an Account Workflow Rule.
- D. Build an Account custom Trigger.
正解：D
質問 # 37
Universal Containers has implemented an order management application. Each Order can have one or more Order Line items. The Order Line object is related to the Order via a master-detail relationship. For each Order Line item, the total price is calculated by multiplying the Order Line item price with the quantity ordered.
What is the best practice to get the sum of all Order Line item totals on the Order record?
- A. Quick action
- B. Apex trigger
- C. Formula field
- D. Roll-up summary field
正解：D
質問 # 38
Which two characteristics are true for Lightning Web Component custom events?
Choose 2 answers
- A. Data may be passed In the payload of a custom event using a wire decorated properties.
- B. By default a custom event only propagates to its immediate container and to its immediate child component.
- C. By default a custom event only propagates to it's immediate container.
- D. Data may be passed in the payload of a custom event using a property called detail.
正解：B、D
質問 # 39
Universal Containers decides to use exclusively declarative development to build out a new Salesforce application. Which three options should be used to build out the database layer for the application? Choose 3 answers
- A. Roll-Up Summaries
- B. Custom Objects and Fields
- C. Triggers
- D. Relationships
- E. Flow
正解：A、B、D
質問 # 40
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 as global and use the public access modifier on the method.
- C. Declare the class as public and use the global access modifier on the method.
- D. Declare the class and method using the global access modifier.
正解：D
質問 # 41
When a user edits the postal Code on an Account, a custom Account text field named. Timezone' must be updated based on the values in a PostalCodeToTimezone_c custom ogject.
Which two automationtools can be used to implement this feature?
Choose 2 answers
- A. Quick actions
- B. Approval process
- C. Account trigger
- D. Fast field Updates record-triggered flow
正解：C、D
質問 # 42
A Licensed_Professional__c custom object exist in the system with two Master-Detail fields for the following objects: Certification__c and Contact. Users with the "Certification Representative" role can access the Certification records they own and view the related Licensed Professionals records, however users with the "Salesforce representative" role report they cannot view any Licensed professional records even though they own the associated Contact record. What are two likely causes of users in the "Sales Representative" role not being able to access the Licensed Professional records? Choose 2 answers
- A. The organization recently modified the Sales representative role to restrict Read/Write access to Licensed_Professional__c
- B. The organization has a private sharing model for Certification__c, and Certification__c is the primary relationship in the Licensed_Professional__c object. (Missed)
- C. The organization has a private sharing model for Certification__c, and Contact is the primary relationship in the Licensed_Professional__c object
- D. The organization's sharing rules for Licensed_Professional__c have not finished their recalculation process. (Missed)
正解：A、B
質問 # 43
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Salesforce DEX-450認定試験は、稲妻の経験でApexとVisualforceを使用してプログラム開発の経験がある専門家向けに設計されています。この認定は、Salesforceプラットフォームにカスタムアプリケーションを構築する際の専門知識を実証したい開発者に最適です。試験では、Apexプログラミング言語、VisualForce Markup Language、Lightning Components Frameworkの知識について候補者をテストします。
Salesforce DEX-450試験に合格することは、キャリアを進め、業界での信頼性を高めたい開発者にとって重要な成果です。彼らは、クライアントや組織のニーズを満たす複雑なプログラムソリューションを構築するスキルと知識を持っていることを示しています。さらに、認定されたSalesforce Platform Developer IIであることは、新しい雇用機会を開き、収益の可能性を高めることができます。全体として、Salesforce DEX-450試験は、Salesforceプラットフォームでプログラム開発に優れている開発者にとって、やりがいのあるがやりがいのある経験です。
Salesforce DEX-450 資格認定は、Apex および Visualforce を使用したプログラム開発の専門知識を Lightning Experience で証明するための優れた方法です。Salesforce 開発のキャリアを進め、競争力のある求人市場で目立つようにするために、開発者にとって有価な資格認定です。
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