PDI Exam Dumps - Salesforce Developers Questions and Answers

When writing test classes, accessing the Standard Price Book is essential for creatingOpportunityLineItemrecords.

The methodTest.getStandardPricebookId()is specifically designed to retrieve the Standard Price Book ID in a test class context. This ensures you can work with the price book without requiring@isTest(SeeAllData=true).

Why not other options?

B:@isTest(SeeAllData=true)is not recommended because it violates Salesforce best practices by accessing actual org data.

C:@TestVisibleis used for visibility between classes but does not relate to retrieving Standard Price Book.

D:Test.loadData()loads test data from static resources but is unnecessary for accessing the Standard Price Book.

The provided code attempts to update allLeadrecords in an environment with more than 2,000 records. This will likely exceed the governor limit for the total number of records processed in DML statements, which is 10,000 per transaction. To avoid this, the developer can useDatabase.updatewith batching logic.

Trigger.old in a before insert trigger:

TheTrigger.oldcontext variable contains the old version of the records being processed in the trigger.

In abefore inserttrigger, the records being processed are new and have no prior state in the database, soTrigger.oldisnull.

This behavior is specific to insert triggers because there is no "old" record to reference before the record is created.

Why is it null?

The Trigger.old variable is only populated for triggers that handle updates or deletions (e.g., before update, after update, before delete, after delete). For insert operations, no previous state of the record exists.

Why not the other options?

A. An empty list of sObjects:

This is incorrect because Trigger.old is not initialized as an empty list for insert triggers—it is simply null.

B. Undefined:

Trigger.old is defined in the trigger context, but it is null for insert operations. Undefined is not a valid Apex state.

D. A list of newly created sObjects without IDs:

This describes Trigger.new in abefore inserttrigger, not Trigger.old. Trigger.new contains the new records being inserted.

Global Access Modifier:

When building managed packages, methods and classes that need to be accessible outside the package namespace must be declaredglobal.

Publicrestricts access to within the namespace.

Why Not Other Options?

B:Publiclimits access to within the namespace.

CandD: Mixingpublicandglobalincorrectly doesn't meet the requirement for external accessibility.

The code provided processes allCaserecords in a single transaction. Since it attempts to process over 10,000 records, it exceeds the Salesforce governor limit of 50,000 DML rows per transaction, causing the transaction to fail.

Governor Limits on DML Rows (C):Salesforce enforces a governor limit of 50,000 rows for DML operations per transaction. In this case, if theSELECTquery retrieves over 50,000 records, theDatabase.updatecall will hit this limit and throw aSystem.LimitException.

In Aura components:

B. Renderer:Contains custom rendering logic.

C. Controller:Manages user interaction and component events.

E. Helper:Contains reusable JavaScript functions for logic.

C: The Bulk API is designed for importing or exporting large volumes of data and works efficiently in development environments, but it respects storage limits.

D: Developer and Developer Pro sandboxes have different storage limits. Developer Pro has a larger storage limit compared to a Developer sandbox.

Why not other options?

A: Bulk API does not bypass storage limits.

B: The Data Import Wizard is a web-based tool, not an application installed on your computer.

LimitExceptioncannot be caught in atry-catchblock because it is thrown when governor limits are exceeded, and Salesforce does not allow further processing in such cases.

Other exceptions, such as custom exceptions,NoAccessException, orCalloutException, can be caught and handled.

To use an Apex interface within a class, the class must implement the interface using theimplementskeyword. This is the correct way to inherit behavior defined in an interface.

Example:

public class SilverLaptop implements Laptop {

// Implementation of the methods defined in the Laptop interface

}

Why not other options?

B: Theextendskeyword is used for inheriting from a class, not implementing an interface.

C: This syntax is incorrect and not supported in Apex.

D: This syntax is also incorrect as interfaces are not referenced with an@Interfaceannotation in Apex.

 Why Queueable?

Queueable Apex allows asynchronous processing, which can handle bulk updates efficiently without hitting governor limits.

The trigger enqueues the Queueable class to process the asset updates.

 Avoiding Limit Failures:

Moving logic to a Queueable class offloads resource-intensive operations to asynchronous processing.