Salesforce Salesforce Certifications DEX-450 Questions & Answers

• Question 111:

  Given the code below, what can be done so that recordcount can be accessed by a test class, but not by a non-test class? Public class mycontroller{ private integer recordcount; }

  A. Add a seealldata annotation to the test class

  B. Add the testvisible annotation to recordcount

  C. Change recordcount from private to public

  D. Add the testvisible annotation to the mycontroller class

  Correct Answer: B

• Question 112:

  A developer has the following trigger that fires after insert and creates a child Case whenever a new Case is created. List childCases = new List();for (Case parent : Trigger.new){Case child = new Case (ParentId = parent.Id, Subject = parent.Subject);childCases.add(child);}insert childCases; What happens after the code block executes?

  A. Multiple child cases are created for each parent case in Trigger.new.

  B. Child case is created for each parent case in Trigger.new.

  C. The trigger enters an infinite loop and eventually fails.

  D. The trigger fails if the Subject field on the parent is blank.

  Correct Answer: B

• Question 113:

  A developer has an integer variable called maxAttempts. The developer meeds to ensure that once maxAttempts is initialized, it preserves its value for the lenght of the Apex transaction; while being able to share the variable's state between trigger executions. How should the developer declare maxAttempts to meet these requirements?

  A. Declare maxattempts as a member variable on the trigger definition.

  B. Declare maxattempts as a private static variable on a helper class

  C. Declare maxattempts as a constant using the static and final keywords

  D. Declare maxattempts as a variable on a helper class

  Correct Answer: C

• Question 114:

  What are the supported content sources for custom buttons and links? (Choose 2 Answers)

  A. VisualForce Page.

  B. Static Resource.

  C. URL.

  D. Chatter File.

  E. Lightning Page.

  Correct Answer: AC

• Question 115:

  Which exception type cannot be caught ?

  A. CalloutException

  B. A custom Exception

  C. NoAccessException

  D. LimitException

  Correct Answer: D

• Question 116:

  Which two combined methods should a developer use to prevent more than one open Opportunity on each Account? Choose 2 answers

  A. Create an Account Roll-up Summary field to count open Opportunities

  B. Create an Opportunity Validation Rule to generate an error on insert

  C. Create an Account Trigger to generate an error on Opportunity insert

  D. Create an Opportunity Workflow Rule to auto-close the Opportunity

  Correct Answer: AB

• Question 117:

  A developer needs to create an audit trail for records that are sent to the recycle bin. Which type of trigger is most appropriate to create?

  A. Before delete

  B. After undelete

  C. After delete

  D. Before undelete

  Correct Answer: B

• Question 118:

  When would a developer use a custom controller instead of a controller extension? Choose 2 answers:

  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.

  Correct Answer: BC

• Question 119:

  A company wants to create an employee rating program that allows employees to rate each other. An employee's average rating must be displayed on the employee record. Employees must be able to create rating records, but are not allowed to create employee records. Which two actions should a developer take to accomplish this task? choose 2 answers

  A. Create a master-detail relanstionship between the rating and employee object

  B. Create a trigger on the rating object that updates a field on the employee object

  C. Create a roll-up sumary field on the employee and use avg to calculate the average rating score

  D. Create a lookup realntionship beteween the rating and employee object

  Correct Answer: AC

• Question 120:

  Which two practices should be used for processing records in a trigger? Choose 2 answers

  A. Use @future methods to handle DML operations.

  B. Use a Map to reduce the number of SOQL calls

  C. Use (callout=true) to update an external system

  D. Use a Set to ensure unique values in a query filter

  Correct Answer: BD