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Salesforce PDI (Platform Developer I) certification exam is designed for professionals who are interested in developing applications on the Salesforce platform. It is an entry-level certification exam that focuses on testing the developer's knowledge of Salesforce development tools, such as Apex, Visualforce, and Salesforce Lightning. PDI Exam is intended for individuals who have experience in programming languages like Java or C# and want to transition to Salesforce development.
NEW QUESTION # 108
A developer has an integer variable called maxattempts. The developer needs to ensure that once maxattempts is initialized, it preserves its value for the length of the Apex transaction; while being able to share the variable's state between trigger executions.
How should the developer declare mazattempts to meet these requirements?
Answer: C
Explanation:
Requirements:
The maxAttempts variable must:
Preserve its value for the length of the Apex transaction.
Be able to share the variable's state between trigger executions.
Solution:
To meet these requirements, the variable should be declared as a private static variable on a helper class.
Option D: Declare maxAttempts as a private static variable on a helper class.
Correct Approach.
Static Variables:
Static variables retain their value throughout the execution context of the Apex transaction.
They are shared across trigger contexts and can be used to maintain state between trigger executions.
Private Modifier:
Keeps the variable encapsulated within the class.
Helper Class:
Placing the variable in a helper class allows it to be accessed from multiple triggers or classes within the transaction.
Sample Code:
public class MyHelperClass {
private static Integer maxAttempts = 0;
public static void incrementAttempts() {
maxAttempts++;
}
public static Integer getMaxAttempts() {
return maxAttempts;
}
}
Benefits:
State Preservation: Static variables maintain their state during the transaction.
Accessibility: Can be accessed from different triggers or classes.
Declaring as static final makes the variable a constant.
Constants cannot change value once initialized.
We need the variable to preserve and change its value during the transaction.
Option B: Declare maxAttempts as a member variable on the trigger definition.
Not Possible.
You cannot declare variables directly on the trigger definition.
Triggers do not support member variables.
Option C: Declare maxAttempts as a variable on a helper class.
Insufficient.
Declaring it as an instance variable (non-static) on a helper class means it does not retain its value across trigger executions within the same transaction.
Each instantiation would have its own copy of the variable.
Conclusion:
Declaring maxAttempts as a private static variable on a helper class satisfies the requirements.
It ensures the variable retains its value throughout the Apex transaction and can be shared between trigger executions.
Reference:
Static and Instance Variables
Understanding Apex Transactions
Why Other Options are Not Suitable:
Option A: Declare maxAttempts as a constant using the static and final keywords.
Incorrect.
NEW QUESTION # 109
AW Computing tracks order information in custom objects called order__c and order_Line_ c - Currently, all shipping information is stored in the order__c object.
The company wants to expand Its order application to support split shipments so that any number of order_Line__c records on a single order__c can be shipped to different locations.
What should a developer add to fulfill this requirement?
Answer: B
NEW QUESTION # 110
A developer wants to display all of the available record types for a Case object. The developer also wants to display the picklist values for the Case.Status field. The Case object and the Case.Status field are on a custom Visualforce page. Which action can the developer perform to get the record types and picklist values in the controller? (Choose 2)
Answer: C,D
NEW QUESTION # 111
What is the maximum number of SOQL queries used by the following code? List<Account> aList = [SELECT Id FROM Account LIMIT 5]; for (Account a : aList){ List<Contact> cList = [SELECT Id FROM Contact WHERE AccountId = :a.Id); }
Answer: D
NEW QUESTION # 112
What are two considerations for deploying from a sandbox to production?
Choose 2 answers
Answer: C,D
NEW QUESTION # 113
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