Page: 1
/ 14
Total 204 questions
Salesforce Certified Platform Developer Plat-Dev-201 Exam Questions
Question 1
A developer created a trigger on the Account object. While testing the trigger, the developer sees the error message 'Maximum trigger depth exceeded'.
What could be the possible causes?
Answer : D
Maximum Trigger Depth Exceeded:
This error occurs when a trigger causes recursive calls, leading to an infinite loop of execution.
Solution:
Use static variables in helper classes to prevent recursive trigger execution.
Example:
public class TriggerHelper {
public static Boolean isTriggerExecuted = false;
}
trigger AccountTrigger on Account (after update) {
if (!TriggerHelper.isTriggerExecuted) {
TriggerHelper.isTriggerExecuted = true;
// Trigger logic here
}
}
Why Not Other Options?
A: Permissions do not affect trigger recursion.
B: Length of the trigger is unrelated to recursion.
C: Code coverage does not influence runtime errors like recursion.
Question 2
A developer needs to prevent the creation of Request__c records when certain conditions exist in the system. A RequestLogic class exists that checks the conditions.
What is the correct implementation?
Answer : B
Comprehensive and Detailed Explanation From Exact Extract: When preventing the creation of records using business logic in an Apex trigger, it's crucial to do it in a before insert trigger context so the records are not committed to the database. The method should be called using trigger.new (case-sensitive) which references the list of new records being inserted.
Triggers and Order of Execution
Apex Trigger Context Variables
Question 3
As part of new feature development, a developer is asked to build a responsive application capable of responding to touch events, that will be executed on stateful clients.
Which two technologies are built on a framework that fully supports the business requirement? Choose 2 answers
Answer : A, D
Lightning Web Components (LWC):
Fully responsive and designed to handle touch events.
Executes on stateful clients with high performance.
Aura Components:
Supports responsive designs and touch events but is slightly less efficient than LWC.
Why Not Other Options?
B . Visualforce Components: Not designed for responsiveness or touch event handling.
C . Visualforce Pages: Primarily server-rendered and not stateful for touch interactions.
Question 4
What are three capabilities of the
Choose 3 answers
Answer : A, D, E
Option A: The<ltng:require>tag ensures that scripts are loaded only once, even if referenced multiple times.
Option D: The tag allows you to specify the order of scripts to ensure dependencies are loaded correctly.
Option E: Externally hosted scripts can be loaded using thescriptsattribute.
Not Suitable:
Option B (Loading scripts in parallel): Scripts are loaded sequentially to ensure proper dependency handling.
Option C (Loading Files from Documents): Files must be hosted externally or in static resources, not in Documents.
:ltng:require Documentation
Question 5
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 maxAttempts to meet these requirements?
Answer : D
To preserve the value ofmaxAttemptsfor the length of the Apex transaction and share its state between trigger executions:
Static Variable:
Static variables are initialized once per transaction and retain their value throughout the transaction.
They can be accessed without instantiating the class.
Private Scope:
Declaring it as private ensures encapsulation and prevents unintended external modification.
Helper Class:
Using a helper class ensures the separation of concerns, keeping trigger logic clean and adhering to best practices.
Example Code:public class HelperClass {
private static Integer maxAttempts = 5; // Default value
public static Integer getMaxAttempts() {
return maxAttempts;
}
public static void setMaxAttempts(Integer attempts) {
maxAttempts = attempts;
}
}
A:Constants (static + final) cannot be modified after initialization.
B:Trigger member variables cannot retain values across executions within the same transaction.
C:Declaring it as a non-static variable in a helper class would reset its value during each trigger execution.
Why Not the Other Options?
Question 6
What is the result of the following code?
Answer : A
Based on the provided code, an exception is likely being thrown if a required field is missing or if there are validation rules that the record does not meet. Salesforce will throw an exception when an attempt to create a record violates constraints.
Why not other options?
B: Salesforce reports errors for failed DML operations unless they are handled in atry-catchblock.
C: The record cannot be created successfully if constraints are violated.
D: Debug logs may provide details, but the record creation would fail.
:
Apex DML Exception Handling
Question 7
A developer is integrating with a legacy on-premise SQL database.
What should the developer use to ensure the data being integrated is matched to the right records in Salesforce?
Answer : B
AnExternal ID fieldis used to match data in Salesforce with data from external systems (like an on-premise SQL database). It allows for easy upserts and data integration without relying on Salesforce IDs.
Why not other options?
A: External objects are used for real-time integration with external systems but do not address data matching directly.
C: Formula fields are calculated fields and cannot be used for data matching.
D: Lookup fields are used for creating relationships between objects within Salesforce, not for matching external data.
All Official Question Types