DEX-450 Detail Explanation | Free DEX-450 Test Questions

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Salesforce DEX-450 certification exam is designed for professionals who have experience 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 want to demonstrate their expertise in building custom applications on the Salesforce platform. DEX-450 exam tests candidates on their knowledge of Apex programming language, Visualforce markup language, and Lightning Components framework.

Salesforce DEX-450: Programmatic Development using Apex and Visualforce in Lightning Experience certification exam is a great way for developers to validate their skills and expertise in programmatic development. It covers a wide range of topics related to Apex and Visualforce development in the Lightning Experience and is a must-have for developers who want to advance their careers in the Salesforce ecosystem. With this certification, developers can demonstrate their ability to develop custom applications and automate business processes in Salesforce, which is essential for success in today's competitive job market.

DEX-450 Detail Explanation

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Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Sample Questions (Q139-Q144):

NEW QUESTION # 139
What is the result of the following code block ?
Integer x = 1;Integer Y = 0;While(x 10){Y++;}

A. Y = 10
B. X = 0
C. Y = 9
D. An error occurs

Answer: D

NEW QUESTION # 140
A developer wrote an Apex method to update a list of Contacts and wants to make it available for use by Lightning web components.
Which annotation should the developer add to the Apex method to achieve this?

Answer: A

NEW QUESTION # 141
A developer wrote a unit test to confirm that a custom exception works properly in a custom controller, but the test failed due to an exception being thrown.
Which step should the developer take to resolve the issue and properly test the exception?

A. Use the database methods with all or none set to FALSE.
B. Use try/catch within the unit test to catch the exception.
C. Use the finally bloc within the unit test to populate the exception.
D. Use Test.isRunningTest() within the custom controller.

Answer: B

NEW QUESTION # 142
How many accounts will be inserted by the following block ofcode? for(Integer i = 0 ; i
500; i++) { Account a = new Account(Name='New Account ' + i); insert a; }
* 0
87. Boolean odk;
Integer x;
if(abok=false;integer=x;){
X=1;
}elseif(abok=true;integer=x;){
X=2;
}elseif(abok!=null;integer=x;){
X=3;
)elseif{
X=4;}

A. X=10
B. X=9
C. X=8
D. X=4

Answer: D

NEW QUESTION # 143
An after trigger on the Account object performs a DML update operation on all of the child Opportunities of an Account. There are no active triggers on the Opportunity object, yet a "maximum trigger depth exceeded" error occurs in certain situations.
Which two reasons possibly explain the Account trigger firing recursively? (Choose two.)

A. Changes to Opportunities are causing cross-object workflow field updates to be made on the Account.
B. Changes are being made to the Account during an unrelated parallel save operation.
C. Changes are being made to the Account during Criteria Based Sharing evaluation.
D. Changes to Opportunities are causing roll-up summary fields to update on the Account.

Answer: A,D

NEW QUESTION # 144
......

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