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Valid DEX-450 Test Papers | DEX-450 Reliable Exam Blueprint
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Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Sample Questions (Q134-Q139):
NEW QUESTION # 134
A developer created a custom order management app that uses an Apex class. The order is represented by an Order object and an Orderltem object that has a master-detail relationship to Order. During order processing, an order may be split into multiple orders.
What should a developer do to allow their code to move some existing Orderltem records to a new Order record?
- A. Add without sharing to the Apex class declaration.
- B. Change the master-detail relationship to an external lookup relationship.
- C. Create a junction object between Orderltem and Order.
- D. Select the Allow reparenting option on the master-detail relationship.
Answer: D
NEW QUESTION # 135
What is the value of the Trigger.old context variable in a before insert trigger?
- A. list of newly created sObjects without IDs
- B. Undefined
- C. null
- D. An empty list of sObjects
Answer: C
Explanation:
In a before insert trigger:
Trigger.old is null.
There is no existing record in the database to reference.
Why Not Other Options:
Option A: Describes Trigger.new.
Option B: The variable is defined but has a null value.
Option D: Trigger.old is not an empty list; it is null.
Reference:
Trigger Context Variables:
"In insert triggers, Trigger.old is null because the records are new."
- Apex Developer Guide: Trigger Context Variables
NEW QUESTION # 136
The Salesforce Administrator created a custom picklist field, Account_status_c, on the a Account object. This picklist has possible values of Inactive'' and Active?
As part of a new business process, management wants to ensure an opportunity record is created only for Accounts marked as "Active". A developer is asked to implement this business requirement.
Which two automation tools should be used to fulfill the business need?
Choose 2 answers
- A. Process Builder
- B. Salesforce Flow
- C. Approval Process
- D. Workflow Rules
Answer: B
NEW QUESTION # 137
Which aspect of Apex programming is limited due to multitenancy?
- A. The number of records processed in a loop
- B. The number of records returned from database queries
- C. The number of active Apex classes
- D. The number of methods in an Apex Class
Answer: B
NEW QUESTION # 138
Universal Hiring uses Salesforce to capture job applications. A salesforce administrator created two custom objects; Job__c acting as the maste object, Job _Application__c acting as the detail.
Within the Job ___c object, a custom multi-select picklist, preferred Locations __c, contains a list of approved states for the position. Each Job_Application__c record relates to a Contact within the system through a master-detail relationship.
Recruiters have requested the ability to view whether the Contact's Mailing State value matches a value selected on the Preferred_Locations__c field, within the Job_Application__c record. Recruiters would like this value to be kept in sync if changes occur to the Contact's Mailing State.
What is the recommended tool a developer should use to meet the business requirement?
- A. Formula field
- B. Apex trigger
- C. Roll-up summary field
- D. Record-triggered flow
Answer: D
NEW QUESTION # 139
......
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