Salesforce CRT-450 Online Practice Questions and Exam Preparation

Salesforce CRT-450 Online Questions & Answers

• Question 421:

  A developer encounters APEX heap limit errors in a trigger. Which two methods should the developer use to avoid this error? (Choose two.)

  A. Use the transient keyword when declaring variables.
  B. Query and store fields from the related object in a collection when updating related objects.
  C. Remove or set collections to null after use.
  D. Use SOQL for loops instead of assigning large queries results to a single collection and looping through the collection.
  A. Use the transient keyword when declaring variables.
  D. Use SOQL for loops instead of assigning large queries results to a single collection and looping through the collection.

• Question 422:

  A developer wrote Apex code that calls out to an external system. How should a developer write the test to provide test coverage?

  A. Write a class that extends HTTPCalloutMock.
  B. Write a class that implements the HTTPCalloutMock interface.
  C. Write a class that implements the WebserviceMock interface.
  D. Write a class that extends WebserviceMock
  B. Write a class that implements the HTTPCalloutMock interface.

• Question 423:

  A developer wants to display all of the picklist entries for the Opportunity StageName field and all of the available record types for the Opportunity object on a Visualforce page. Which two actions should the developer perform to get the available picklist values and record types in the controller? Choose 2 answers.

  A. Use Schema.RecordTypeInfo returned by RecordType.SObjectType.getDescribe().getRecordTypeInfos().
  B. Use Schema.PicklistEntry returned by Opportunity.SObjectType.getDescribe().getPicklistValues().
  C. Use Schema.PicklistEntry returned by Opportunity.StageName.getDescribe().getPicklistValues().
  D. Use Schema.RecordTypeInfo returned by Opportunity.SObjectType.getDescribe().getRecordTypeInfos().
  B. Use Schema.PicklistEntry returned by Opportunity.SObjectType.getDescribe().getPicklistValues().
  D. Use Schema.RecordTypeInfo returned by Opportunity.SObjectType.getDescribe().getRecordTypeInfos().

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  Explanation/Reference:

• Question 424:

  Which trigger event allows a developer to update fields in the Trigger.new list without using an additional DML statement?Choose 2 answers

  A. Before insert
  B. Before update
  C. After update
  D. After insert
  A. Before insert
  B. Before update

• Question 425:

  Universal Containers has a Visualforce page that displays a table of every Container_c. being ....... Is falling with a view state limit because some of the customers rent over 10,000 containers.

  What should a developer change about the Visualforce page to help with the page load errors?

  A. Use Lazy loading and a transient List variable.
  B. Use JavaScript remoting with SOQL Offset.
  C. Implement pagination with an OffsetController.
  D. Implement pagination with a StandardSetController,
  D. Implement pagination with a StandardSetController,

• Question 426:

  A developer needs to display all of the available fields for an object. In which two ways can the developer retrieve the available fields if the variable myObject represents the name of the object? (Choose two.)

  A. Use myObject.sObjectType.getDescribe().fieldSet() to return a set of fields.
  B. Use mySObject.myObject.fields.getMap() to return a map of fields.
  C. Use Schema.describeSObjects(new String[]{myObject})[0].fields.getMap() to return a map of fields.
  D. Use getGlobalDescribe().get(myObject).getDescribe().fields.getMap() to return a map of fields.
  B. Use mySObject.myObject.fields.getMap() to return a map of fields.
  C. Use Schema.describeSObjects(new String[]{myObject})[0].fields.getMap() to return a map of fields.

• Question 427:

  A developer identifies the following triggers on the Expense_c object:

  1.

  DeleteExpense,

  2.

  applyDefaultstoexpense

  3.

  validateexpenseupdate;

  The triggers process before delete, before insert, and before update events respectively. Which two techniques should the developer implement to ensure trigger best practice are followed?

  A. Unify the before insert and before update triggers and use Process Builder for the delete action.
  B. Maintain all three triggers on the Expense__c object, but move the Apex logic out for the trigger definition.
  C. Create helper classes to execute the appropriate logic when a record is saved.
  D. Unify all three triggers in a single trigger on the Expense__c object that includes all events.
  C. Create helper classes to execute the appropriate logic when a record is saved.
  D. Unify all three triggers in a single trigger on the Expense__c object that includes all events.

• Question 428:

  When would a developer use a custom controller instead of a controller extension?

  A. When a Visualforce page needs to replace the functionality of a standard controller
  B. When a Visualforce page does not reference a single primary object
  C. When a Visualforce page should not enforce permissions or field-level security
  D. When a Visualforce page needs to add new actions to a standard controller
  B. When a Visualforce page does not reference a single primary object
  C. When a Visualforce page should not enforce permissions or field-level security

• Question 429:

  Which two statements accurately represent the MVC framework implementation in Salesforce? Choose 2 answers

  A. Validation rules enforce business rules and represent the Controller (C) part of the MVC framework
  B. Lightning component HTML files represent the Model (M) part of the MVC framework.
  C. Triggers that create records represent the Model (M) part of the MVC framework.
  D. Standard and Custom objects used in the app schema represent the View (V) part of the MVC framework
  A. Validation rules enforce business rules and represent the Controller (C) part of the MVC framework
  C. Triggers that create records represent the Model (M) part of the MVC framework.

• Question 430:

  What is the debug output of the following Apex code?

  Decimal theValue;System.debug(theValue);

  A. 0.0
  B. null
  C. Undefined
  B. null

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  Explanation/Reference: