Salesforce DEX-450 Online Practice Questions and Exam Preparation

Salesforce DEX-450 Online Questions & Answers

• Question 371:

  When the number of record in a recordset is unknown, which control statement should a developer use to implement a set of code that executes for every record in the recordset, without performing a .size() or .length() method call?

  A. For (init_stmt, exit_condition; increment_stmt) { }
  B. Do { } While (Condition)
  C. For (variable : list_or_set) { }
  D. While (Condition) { ... }
  C. For (variable : list_or_set) { }

• Question 372:

  Which two statement can a developer use to throw a custom exception of type MissingFieldValueException?Choose 2 answers

  A. Throw (MissingFieldValueException,'Problem occurred');
  B. Throw new MissingFieldValueException('Problem occurred');
  C. Throw new MissingFieldValueException();
  D. Throw Exception(new MissingFieldValueException());
  B. Throw new MissingFieldValueException('Problem occurred');
  C. Throw new MissingFieldValueException();

• Question 373:

  Which feature should a developer use to update an inventory count on related Product records when the status of an Order is modified to indicate it is fulfilled?

  A. Process Builder process
  B. Lightning component
  C. Visualforce page
  D. Workflow rule
  A. Process Builder process

• Question 374:

  A developer creates a method in an Apex class and needs to ensure that errors are handled properly. What would the developer use? (There are three correct answers.)

  A. ApexPages.addErrorMessage()
  B. A custom exception
  C. .addError()
  D. Database.handleException()
  E. A try/catch construct
  B. A custom exception
  C. .addError()
  E. A try/catch construct

• Question 375:

  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 getOpportunityProducts(Set opportunityIds){ List oppLineItems = new List(); 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. Use the System.Limits.getQueries() method to ensure the number of queries is less than 100.
  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. Refactor the code above to perform only one SOQL query, filtering by the Set of opportunityIds.
  A. Use the System.Limits.getQueries() method to ensure the number of queries is less than 100.

• Question 376:

  Which statement would a developer use when creating test data for products and pricebooks?

  A. Id pricebookId = Test.getStandardPricebookId();
  B. Pricebook pb = new Pricebook();
  C. IsTest(SeeAllData = false);
  D. List objList = Test.loadData(Account.sObjectType, 'myResource');
  A. Id pricebookId = Test.getStandardPricebookId();

• Question 377:

  Which approach should a developer use to add pagination to a Visualforce page?

  A. A StandardController
  B. The Action attribute for a page
  C. The extensions attribute for a page
  D. A StandardSetController
  D. A StandardSetController

• Question 378:

  A developer wants to import 500 Opportunity records into a sandbox. Why should the developer choose to use data Loader instead of Data Import Wizard?

  A. Data Loader runs from the developer's browser.
  B. Data Import Wizard does not support Opportunities.
  C. Data Loader automatically relates Opportunities to Accounts.
  D. Data Import Wizard can not import all 500 records.
  B. Data Import Wizard does not support Opportunities.

• Question 379:

  A user selects a value from a multi-select picklist. How is this selected value represented in Apex?

  A. As a string ending with a comma
  B. As a string
  C. As a list< String > with one element
  D. As a set< string > with one element
  B. As a string

• Question 380:

  What is the accurate statement about with sharing keyword? choose 2 answers

  A. Inner class do not inherit the sharing setting from the container class
  B. Both inner and outer class can be declared as with sharing
  C. Either inner class or outer classes can be declared as with sharing but not both
  D. Inner class inherit the sharing setting from the container class
  A. Inner class do not inherit the sharing setting from the container class
  B. Both inner and outer class can be declared as with sharing