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The DEX-450 certification exam consists of 60 multiple-choice questions that need to be completed within 105 minutes. To pass the exam, candidates need to score at least 65%. DEX-450 exam can be taken in-person at a testing center or remotely online.
To prepare for the Salesforce DEX-450 exam, candidates should focus on building their programming skills and understanding of the Lightning Experience. They should review the exam objectives in detail, which cover topics such as Apex programming, Visualforce development, and Lightning Component Framework. Candidates should also work on sample projects and practice coding exercises to hone their skills and gain hands-on experience with the platform.
Salesforce DEX-450 exam is a challenging certification that tests a developer's knowledge and skills in programmatic development using Apex and Visualforce in the Lightning Experience. Passing DEX-450 exam validates a developer's expertise in designing and building custom applications, integrations, and automation solutions on the Salesforce platform. Programmatic Development using Apex and Visualforce in Lightning Experience certification is highly regarded in the Salesforce community and can help developers advance their careers in this field.
NEW QUESTION # 40
Universal Containers wants a list button to display a Visualforce page that allows users to edit multiple records.
Which Visualforce feature supports this requirement?
- A.
- B.
- C.
- D.
Answer: D
NEW QUESTION # 41
A developer must modify the following code snippet to prevent the number of SOQL queries issued from exceeding the platform governor limit. public class without sharing OpportunityService( public static List<OpportunityLineItem> getOpportunityProducts(Set<Id> opportunityIds){ List<OpportunitylineItem> oppLineItems = new List<OpportunityLineItem>(); for(Id thisOppId : opportunityIds){ oppLineItems.addAll([Select Id FROM OpportunityLineItems WHERE OpportunityId = :thisOppId)]; } return oppLineItems; } } The above method might be called during a trigger execution via a Lightning component. Which technique should be implemented to avoid reaching the governor limit?
- A. Refactor the code above to perform only one SOQL query, filtering by the Set of opportunityIds.
- B. Use the System.Limits.getlimitQueries() method to ensure the number of queries is less than 100.
- C. Refector the code above to perform the SOQL query only if the Set of opportunityIds contains less 100 Ids.
- D. Use the System.Limits.getQueries() method to ensure the number of queries is less than 100.
Answer: A
NEW QUESTION # 42
Given the code block: Integer x; for (x =0; x<10; x+=2){
if (x==8) break; if (x==10) break;
} system.debug(x); Which value will the system.debug display?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 43
An Apex method, getAccounts, that returns a List of Accounts given a search Term, is available for Lighting Web components to use. What is the correct definition of a Lighting Web component property that uses the getAccounts method?
- A. @wire(getAccounts, {searchTerm: '$searchTerm'})
accountList; - B. @AuraEnabled(getAccounts, {searchTerm: '$searchTerm'})
accountList; - C. @wire(getAccounts, '$searchTerm')
accountList; - D. @AuraEnabled(getAccounts, '$searchTerm')
accountList;
Answer: A
Explanation:
https://developer.salesforce.com/docs/component-library/documentation/en/48.0/lwc/lwc.data_wire_service_about
NEW QUESTION # 44
A custom picklist field, Food_Preference__c, exist on a custom object. The picklist contains the following options: 'Vegan','Kosher','No Preference'. The developer must ensure a value is populated every time a record is created or updated. What is the most efficient way to ensure a value is selected every time a record is saved?
- A. Set a validation rule to enforce a value is selected.
- B. Set "Use the first value in the list as the default value" as True.
- C. Mark the field as Required on the field definition.
- D. Mark the field as Required on the object's page layout.
Answer: B
NEW QUESTION # 45
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? ns
- A. Use Opportunity. SObjectType.getDescribe().getRecordTypelnfos() to get a list of record types, and iterate through them until [ J isDefaultRecordTypeMapping() is true. Pencil & Paper |
- B. Query the Profile where the ID equals userInfo.getProfileID() and then use the profile.Opportunity.getDefaultRecordType() | |method. ] |
- C. Use the Schema.userlnfo.Opportunity.getDefaultRecordType() method. < Create the opportunity and check the opportunity.recordType before inserting, which will have the record ID of the current Dal user's default record type.
Answer: A
NEW QUESTION # 46
A developer creates a new Visualforce page and Apex extension, and writes test classes that exercise 95% coverage of the new Apex extension.Change set deployment to production fails with the test coverage warning: "Average test coverage across all Apex classes and triggers is 74%, at least 75% test coverage is required."What can the developer do to successfully deploy the new Visualforce page and extension?
- A. Create test classes to exercise the Visualforce page markup.
- B. Select "Fast Deployment'' to bypass running all the tests.
- C. Add test methods to existing test classes from previous deployments.
- D. Select "Disable Parallel Apex Testing" to run all the tests.
Answer: C
NEW QUESTION # 47
How should a developer make sure that a child record on a custom object, with a lookup to the Account object, has the same sharing access as its associated account?
- A. Create a validation rule on the custom object comparing the record owners on both records.
- B. Include the sharing related list on the custom object page layout.
- C. Create a Sharing Rule comparing the custom object owner to the account owner.
- D. Ensure that the relationship between the objects is Master-Detail.
Answer: D
NEW QUESTION # 48
A developer must modify the following code snippet to prevent the number of SOQL queries issued from exceeding the platform governor limit. public class without sharing OpportunityService( public static List<OpportunityLineItem> getOpportunityProducts(Set<Id> opportunityIds){ List<OpportunitylineItem> oppLineItems = new List<OpportunityLineItem>(); for(Id thisOppId : opportunityIds){ oppLineItems.addAll([Select Id FROM OpportunityLineItems WHERE OpportunityId = :thisOppId)]; } return oppLineItems; } } The above method might be called during a trigger execution via a Lightning component. Which technique should be implemented to avoid reaching the governor limit?
- A. Refactor the code above to perform only one SOQL query, filtering by the Set of opportunityIds.
- B. Refector the code above to perform the SOQL query only if the Set of opportunityIds contains less 100 Ids.
- C. Use the System.Limits.getlimitQueries() method to ensure the number of queries is less than 100.
- D. Use the System.Limits.getQueries() method to ensure the number of queries is less than 100.
Answer: C
NEW QUESTION # 49
Which three steps allow a custom SVG to be included in a Lightning web component? Choose 3 answers
- A. Reference the import in the HTML template.
- B. Import the SVG as a content asset file.
- C. Upload the SVG as a static resource. (Missed)
- D. Reference the getter in the HTML template. (Missed)
- E. Import the static resource and provide a getter for it in JavaScript. (Missed)
Answer: C,D,E
NEW QUESTION # 50
A developer has a unit test that is failing. To identify the issue, the developer copies the code inside the test method and executes it via the Execute Anonymous Apex Tool. The code then executes without failing. Why did the unit test failed, but not the Execute Anonymous?
- A. The test method has a syntax error in the code.
- B. The test method use a try/catch block
- C. The test method relies on existing data in the database
- D. The test method calls an @future method.
Answer: C
NEW QUESTION # 51
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. Triggers
- C. Relationships
- D. Custom Objects and Fields
- E. Flow
Answer: A,C,E
NEW QUESTION # 52
A business has a proprietary Order Management System (OMS) that creates orders from their website and fulfills the orders. When the order is created in the OMS, an integration also creates an order record in Salesforce and relates it to the contact as identified by the email on the order. As the order goes through different stages in the OMS, the integration also updates It in Salesforce. It is noticed that each update from the OMS creates a new order record in Salesforce.
Which two actions will prevent the duplicate order records from being created in Salesforce?
Choose 2 answers
- A. Write a before trigger on the order object to delete any duplicates.
- B. Use the order number from the OMS as an external ID.
- C. Ensure that the order number in the OMS is unique.
- D. Use the email on the contact record as an external ID.
Answer: A,C
NEW QUESTION # 53
Developers at Universal Containers (UC) use version control to share their code changes, but they notice that when they deploy their code to different environments they often have failures. They decide to set up Continuous Integration (CI).
What should the UC development team use to automatically run tests as part of their CI process?
- A. Salesforce CLI
- B. Force.com Toolkit
- C. Developer Console
- D. Visual Studio Code
Answer: B
NEW QUESTION # 54
Assuming that 'name; is a String obtained by an <apex:inputText> tag on a Visualforce page. Which two SOQL queries performed are safe from SOQL injections? Choose 2 answers
- A. String query = 'SELECT Id FROM Account WHERE Name LIKE \''%' + name.noQuotes() + '%\''; List<Account> results = Database.query(query);
- B. String query = 'SELECT Id FROM Account WHERE Name LIKE \''%' + String.escapeSingleQuotes(name) + '%\''; List<Account> results = Database.query(query);
- C. String query = 'SELECT Id FROM Account WHERE Name LIKE \''%' + name + '%\''; List<Account> results = Database.query(query);
- D. String query = '%' + name + '%';
List<Account> results = [SELECT Id FROM Account WHERE Name LIKE :query];
Answer: B,D
NEW QUESTION # 55
Universal Containers stores the availability date on each Line Item of an Order and Orders are only shipped when all of the Line Items are available. Which method should be used to calculate the estimated ship date for an Order?
- A. Use a LATEST formula on each of the latest availability date fields.
- B. Use a Max Roll-Up Summary field on the Latest availability date fields.
- C. Use a CEILING formula on each of the Latest availability date fields.
- D. Use a DAYS formula on each of the availability date fields and a COUNT Roll-Up Summary field on the Order.
Answer: B
NEW QUESTION # 56
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