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Valid Salesforce DEX-450 Test Sims & DEX-450 Formal Test

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Salesforce DEX-450 Exam is designed to test the knowledge and skills of developers who want to specialize in programmatic development using Apex and Visualforce in Lightning Experience. Programmatic Development using Apex and Visualforce in Lightning Experience certification is ideal for developers who have experience in developing custom applications on the Salesforce platform and want to take their skills to the next level. DEX-450 exam covers a wide range of topics, including Apex programming language, Visualforce framework, Lightning Components, and more.

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Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Sample Questions (Q115-Q120):

NEW QUESTION # 115
A developer must create a CreditcardPayment class that provides an implementation of an existing Payment class. Public virtual class Payment { public virtual void makePayment(Decimal amount) { /*implementation*/ } } Which is the correct implementation?

A. Public class CreditcardPayment extends Payment {
public override void makePayment(Decimal amount) { /*implementation*/ }
}
B. Public class CreditCardPayment extends Payment {
public virtual void makePayment(Decimal amount) { /*implementation*/ }
}
C. Public class CreditCardPayment implements Payment {
public override void makePayment(Decimal amount) { /*Implementation*/ }
}
D. Public class CreditCardPayment implements Payment {
public virtual void makePayment(Decimal amount) { /*implementation*/ }
}

Answer: A

NEW QUESTION # 116
Universal Container(UC) wants to lower its shipping cost while making the shipping process more efficient. The Distribution Officer advises UC to implement global addresses to allow multiple Accounts to share a default pickup address. The Developer is tasked to create the supporting object and relationship for this business requirement and uses the Setup Menu to create a custom object called "Global Address". Which field should the developer ad to create the most efficient model that supports the business need?

A. Add a Master-Detail field on the Account object to the Global Address object
B. Add a Lookup field on the Account object to the Global Address object.
C. Add a Master-Detail field on the Global Address object to the Account object.
D. Add a Lookup field on the Global Address object to the Account object

Answer: C

NEW QUESTION # 117
Opportunity opp=[SELECT Id,StageName FROM Opportunity LIMIT 1]; Given the code above,how can a developer get the label for the StageName field?

A. Call Opportunity.StageName.getDescribe().getLabel()
B. Call Opportunity.StageName.Label
C. Call Opp.StageName.Label
D. Call Opp.StageName.getDescri

Answer: A

NEW QUESTION # 118
A developer creates a batch Apex job to update a large number of records, and receives reports of the job timing out and not completing.
What is the first step towards troubleshooting the issue?

A. Decrease the batch size to reduce the load on the system.
B. Check the asynchronous job monitoring page to view the job status and logs.
C. Check the debug logs for the batch job.
D. Disable the batch job and recreate it with a smaller number of records.

Answer: B

Explanation:
When a batch Apex job is timing out and not completing, the first step in troubleshooting is to check the job's status and logs in the Asynchronous Job Monitoring page. This page provides information about all asynchronous Apex jobs, including batch Apex, scheduled Apex, future methods, and queueable Apex.
Option D: Check the asynchronous job monitoring page to view the job status and logs.
Correct Approach.
The Asynchronous Job Monitoring page (also known as the Apex Jobs page) in Salesforce Setup allows developers to see the status of all asynchronous Apex jobs.
By checking this page, the developer can see whether the batch job is still running, failed, or completed.
If the job has failed, the page provides error messages that can help identify the cause of the failure.
This is the first step to determine what is happening with the batch job.
While checking the debug logs can provide detailed information, it is more efficient to first check the job status on the asynchronous job monitoring page.
Debug logs can be large and may not be generated if the job did not execute properly.
After identifying the job's status and any error messages, the developer can then decide if checking debug logs is necessary.
Option C: Decrease the batch size to reduce the load on the system.
Possible Solution, Not First Step.
Decreasing the batch size may help prevent timeouts by processing fewer records at a time.
However, before making changes to the batch job, the developer should first investigate the cause of the timeout.
Option A: Disable the batch job and recreate it with a smaller number of records.
Not Recommended as First Step.
Disabling and recreating the batch job without understanding the issue may not resolve the problem.
It's important to diagnose the issue before making changes.
Conclusion:
The first step towards troubleshooting a batch Apex job that is timing out is to check the asynchronous job monitoring page to view the job's status and any error messages.
This provides immediate insight into what is happening with the job and guides the next steps in troubleshooting.
Reference:
Monitor Asynchronous Apex
Apex Jobs Page
Option B: Check the debug logs for the batch job.
Next Step, Not First Step.

NEW QUESTION # 119
An sObject named Application_c has a lookup relationship to another sObject named Position_c. Both Application _c and Position_c have a picklist field named Status_c.When the Status_c field on Position_c is updated, the Status_c field on Application_c needs to be populated automatically with the same value, and execute a workflow rule on Application_c.How can a developer accomplish this?

A. By configuring a cross-object field update with a workflow.
B. By using an Apex trigger with a DML operation.
C. By changing Application_c.Status_c into a formula field.
D. By changing Application_c.Status_c into a roll -up summary field.

Answer: B

NEW QUESTION # 120
......

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