Salesforce PDI Online Practice Questions and Exam Preparation

Salesforce PDI Online Questions & Answers

• Question 221:

  What should a developer use to fix a Lightning web component bug in a sandbox?

  A. Developer Console
  B. Force.com IDE
  C. Execute Anonymous
  D. VS Code
  D. VS Code

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  Explanation

  Visual Studio Code (VS Code) is the recommended tool for Salesforce development. It supports the Salesforce Extensions Pack for debugging and fixing issues in Lightning Web Components (LWCs).

  Not Suitable:

  Option A: The Developer Console is less effective for LWC debugging.

  Option B: The Force.com IDE is deprecated.

  Option C: Execute Anonymous does not provide tools to debug or fix LWC bugs.

• Question 222:

  Which three code lines are required to create a Lightning component on a Visualforce page? Choose 2 answers

  B. $LightningcreateComponent
  C. $Lightning,use
  E. #Lightning,useComponent
  C. $Lightning,use

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  Explanation

  To embed a Lightning component in a Visualforce page, the following are required:

  A: is necessary to include the Lightning framework on the Visualforce page.

  C: $Lightning.use() initializes the Lightning app and is essential for using Lightning components.

  Why not other options?

  B: $Lightning.createComponent is used for creating a specific Lightning component but is not enough on its own.

  D: includes SLDS (Styling) but is unrelated to embedding Lightning components.

  E: This is not a valid syntax.

  References: Embedding Lightning Components in Visualforce

• Question 223:

  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?

  A. External Object
  B. External ID field
  C. Formula field
  D. Lookup field
  B. External ID field

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  Explanation

  An External ID field is 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.

• Question 224:

  A developer creates a custom exception as shown below:

  public class ParityException extends Exception { }

  What are two ways the developer can fire the exception in Apex?

  A. throw new ParityException ();
  B. throw new parityException ('parity does not match');
  C. new ParityException ();
  D. new ParityException('parity does not match');
  A. throw new ParityException ();
  B. throw new parityException ('parity does not match');

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  Explanation

  Throwing Exceptions in Apex:

  throw new ExceptionType(); creates a new instance and throws it.

  A: No argument constructor.

  B: Constructor with a custom error message.

  Why Not Other Options?

  C and D: These create exception instances but do not throw them, which is not valid syntax for firing an exception.

  Apex Exception Handling: https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode /apex_classes_exception_methods.htm

• Question 225:

  In terms of the MVC paradigm, what are two advantages of implementing the view layer of a Salesforce application using Lightning Web Component-based development over Visualforce? Choose 2 answers

  A. Rich component ecosystem
  B. Leg capturing via the Debug Logs Setup page
  C. Built-in standard and custom set controllers
  D. Self-contained and reusable units of an application
  A. Rich component ecosystem
  D. Self-contained and reusable units of an application

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  Explanation

  Advantages of Lightning Web Components (LWC):

  A. Rich component ecosystem:

  LWCs have a modern, rich component library designed for modular and reusable development.

  D. Self-contained and reusable units:

  LWCs are designed to be modular, reusable, and self-contained, reducing duplication and enhancing maintainability.

  Why Not Other Options?

  B. Log capturing via Debug Logs Setup page: This is unrelated to LWC and is a debugging feature.

  C. Built-in standard and custom set controllers: Relevant to Visualforce, not LWCs.

  LWC Documentation: https://developer.salesforce.com/docs/component-library/documentation/en/lwc

• Question 226:

  A company has a custom object, order __c, that has a required, unique external ID field called order Number__c.

  Which statement should be used to perform the DML necessary to insert new records and update existing records in a list of Order __c records using the external ID field?

  A. merge orders;
  B. merge orders Order Number_c;
  C. upsert orders Order Number c;
  D. upsert orders;
  C. upsert orders Order Number c;

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  Explanation

  The upsert DML operation uses an external ID field to determine whether to insert a new record or update an existing one. Specifying Order_Number__c tells Salesforce to match records using that unique external ID. merge is used for deduplication, not external IDs, and upsert orders; without specifying the external ID relies on record Ids instead.

• Question 227:

  A developer created a Lightning web component called statuscomponent to be Inserted into the Account record page.

  Which two things should the developer do to make this component available? Choose 2 answers

  A. Add lightning_Recordpage to the statuscomponent. js file,
  B. Add lightning RecordPage to the statusComp .js-meta.xml file.
  C. Set is Exposes to true In the statuscomponent.js-meta.xml file.
  D. Add Account to the statusComponent. js-meta.xm1 file.
  B. Add lightning RecordPage to the statusComp .js-meta.xml file.
  C. Set is Exposes to true In the statuscomponent.js-meta.xml file.

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  Explanation

  To make an LWC available for use on a record page:

  Target Configuration:

  Add lightning__RecordPage in the component's .js-meta.xml file to specify where the component can be used.

  Expose the Component:

  Set isExposed to true in the .js-meta.xml file to make the component available for use.

  Example .js-meta.xml File:

  

  A: Incorrect placement. The tag must be in the .js-meta.xml file, not the JavaScript file.

  D: The tag is used for metadata labeling, not for exposing or targeting a component.

  Reference LWC Metadata Configuration https://developer.salesforce.com/docs/component-library/documentation/en/lwc/lwc.create_metadata_config_file

• Question 228:

  A developer created a custom order management app that uses an Apex class. The order is represented by an Order object and an OrderlItem object that has a master-detail relationship to Order. During order processing, an order may be split into multiple orders.

  What should a developer do to allow their code to move some existing OrderItem records to a new Order record?

  A. Add without sharing to the Apex class declaration.
  B. Change the master-detail relationship to an external lookup relationship.
  C. Create a junction object between OrderItem and Order.
  D. Select the Allow reprinting option on the master-detail relationship.
  D. Select the Allow reprinting option on the master-detail relationship.

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  Explanation

  Allow Reparenting in Master-Detail Relationships:

  In a master-detail relationship, the child record (in this case, OrderItem) is tightly bound to the parent record (Order).

  By default, child records cannot be reassigned to a different parent record in master-detail relationships. However, enabling the "Allow Reparenting" option on the master-detail field allows the child record (OrderItem) to be reparented to a different master record (Order).

  This is the correct solution as it ensures that OrderItem records can be reassigned to a new Order without changing the structure of the relationship.

  Why not the other options?

  A. Add without sharing to the Apex class declaration:

  Adding without sharing modifies sharing rules but does not affect the ability to reparent child records. This is unrelated to the issue described.

  B. Change the master-detail relationship to an external lookup relationship:

  Changing the relationship type is not necessary. Additionally, doing so could introduce unintended side effects, as master-detail relationships have features like roll-up summaries that are lost with a lookup relationship.

  C. Create a junction object between OrderItem and Order:

  Introducing a junction object is not required. This adds unnecessary complexity and deviates from the intended use of master-detail relationships.

  References:

  Master-Detail Relationship Documentation Allow Reparenting Option

• Question 229:

  Universal Containers (UC) uses a custom object called Vendor. The Vendor custom object has a master-detail relationship with the standard Account object.

  Based on some internal discussions, the UC administrator tried to change the master-detail relationship to a lookup relationship, but was not able to do so.

  What is a possible reason that this change was not permitted?

  A. Some of the Vendor records have null for the Account field.
  B. The Account object has a roll up summary field on the Vendor object.
  C. The Account object does not allow changing a field type for a custom field.
  D. The organization wide default for the Vendor object is Public Read/Write.
  B. The Account object has a roll up summary field on the Vendor object.

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  Explanation

  Master-detail relationships allow roll-up summary fields to aggregate data from child records. If a roll- up summary field exists on the Account object, the relationship cannot be changed to a lookup because lookup relationships do not support roll-up fields.

  Why not other options?

  A: Null values in the Vendor records do not prevent the change.

  C: Custom fields can have their types changed as long as dependencies like roll-up fields are not present.

  D: Organization-wide defaults do not affect the ability to change relationships.

  References: Salesforce Master-Detail Relationships and Roll-Up Summary Fields

• Question 230:

  Universal Containers decides to use purely declarative development to build out a new Salesforce application.

  Which two options can be used to build out the business logic layer for this application? Choose 2 answers

  A. Record-Triggered Flow
  B. Batch Jobs
  C. Remote Actions
  D. Validation Rules
  A. Record-Triggered Flow
  D. Validation Rules

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  Explanation

  For declarative development:

  A. Record-Triggered Flow: Allows building complex logic declaratively without code.

  D. Validation Rules: Enforce data quality by validating record fields before saving.