PDI Practice Test Questions

Explanation:

- A. Higher governor limits for asynchronous transactions: Batch Apex runs asynchronously, and Salesforce provides higher governor limits for asynchronous processes compared to synchronous ones. For example, the number of SOQL queries allowed is 200 instead of 100, and the heap size limit is 12 MB instead of 6 MB.
- B. Governor limits reset per batch execution: Each batch execution starts with a fresh set of governor limits, meaning that limits like SOQL queries, DML statements, and CPU time are reset for each batch iteration.

Explanation: Minimal Maintenance Overhead:

A formula field dynamically calculates the ratio using existing fields
(Total_Rejected_Timesheets__c / Total_Approved_Timesheets__c).
No code or automation is needed—it updates in real-time whenever the referenced fields change.
Implementation Example:
plaintext
IF(Total_Approved_Timesheets__c > 0,
Total_Rejected_Timesheets__c / Total_Approved_Timesheets__c,
NULL
)
Handles division by zero and requires zero maintenance.

Explanation:

Correct Syntax for Interface Implementation:

In Java (and Apex), a class implements interfaces (not extends).
Multiple interfaces are separated by commas:
java
public class DrawList implements Sortable, Drawable {
public void sort() { /*implementation*/ }
public void draw() { /*implementation*/ }
}
Why Not the Other Options?

Option Issue
A. implements Sortable, Implements Drawable Invalid syntax (duplicate implements keyword).
B. extends Sortable, Drawable Interfaces cannot be extended by a class.
D. extends Sortable, extends Drawable Invalid syntax (repeated extends).
Key Takeaways:

✅ implements is used for interfaces.
✅ Multiple interfaces are listed once, separated by commas.
🚫 extends is only for class inheritance (not interfaces).

Explanation:

Modern & Native Integration:

LWC is Salesforce’s recommended framework for custom UI development, offering seamless integration with Salesforce data and security models.
Built for performance and scalability, leveraging modern web standards (Web Components).

Real-Time Validation:

Supports client-side validation (JavaScript) before saving data to the database.
Example: Validate email formats or required fields instantly without server calls.

Database Interaction:

Uses Apex methods (with @AuraEnabled) or Lightning Data Service to securely save data.

❌ Why the other options are not ideal:

A. Flow

❌ Flows are great for process automation and guided screens, but are limited in UI customization and flexibility.

They don’t offer the same level of control over validation and UI behavior as LWC.
C. Visualforce

❌ Outdated compared to LWC.

Limited to page-based architecture, and not optimized for modern, dynamic UI.
Best used for legacy components or where Visualforce-specific features are needed.
D. Vue.js (VUE JavaScript framework)

❌ Not a Salesforce-supported framework.

While powerful for standalone web apps, using it with Salesforce requires external hosting,
integrations, and security management.
Not recommended for internal Salesforce UIs.

Explanation:

- A Formula field is the most efficient way to calculate the ratio between rejected and approved timesheets dynamically.
- Since the Rollup Summary fields already aggregate the total approved and rejected timesheets, a formula can simply divide these values to compute the ratio.
- Formula fields require no maintenance, unlike triggers or flows, and they update automatically whenever the underlying data changes.

Key Takeaways:

✅ Formula field (B) is the simplest, most sustainable solution.
🚫 Avoid unnecessary automation (A/C/D) for static calculations.

❌ Why other options are not ideal:

A. Record-triggered flow

❌ Overkill for a basic calculation that doesn’t require automation logic.
More complex and requires maintenance.

C. Apex trigger

❌ Not needed — adds unnecessary code and testing overhead.
D. Field Update actions

❌ Limited to specific scenarios, and not real-time unless tied to automation (like workflow or process builder).

Explanation:

Purpose:
displays all messages added via ApexPages.addMessage() in a Visualforce page.
It shows validation errors, warnings, and info messages collectively.

Explanation:

- VSCode: With the Salesforce Extensions Pack, developers can deploy code using scripts and integrate with Salesforce CLI (SFDX CLI) for automation.
- SFDX CLI: The Salesforce CLI (SFDX CLI) allows developers to script deployments to any org, including sandboxes, using commands like:

sfdx force:source:deploy -u sandboxAlias -p path/to/source

This enables automated deployments as part of development cycles.

❌ Why the other options are incorrect:
B. Change Sets

❌ Not scriptable.

Requires manual steps in the Salesforce UI.
Not suitable for automation.
D. Developer Console

❌ Used for manual development and debugging (e.g., running Apex, checking logs).
Cannot run deployment scripts or automate deployments.

Key Use Cases:

✅ VS Code + SFDX CLI = Full automation (e.g., deploy.sh scripts).
🚫 Change Sets/Developer Console = Manual, UI-only workflows.

Explanation:

- A Record-Triggered Flow is the best choice for automatically deleting related Opportunity records when an Account is deleted.
- This type of flow runs immediately when a record change occurs (such as deletion) and can be configured to delete child records efficiently.
- It eliminates the need for manual intervention and ensures data integrity during cleanup operations.

❌ Why other options are incorrect:
A. Workflow Rules

❌ Cannot perform record deletion.
Limited to field updates, outbound messages, and email alerts.
B. Scheduled Job

❌ Requires Apex and is meant for batch or time-based operations.
Not event-driven like record deletion.
D. Process Builder

❌ Deprecated in favor of Flow.
Cannot trigger on delete events, so it cannot handle this use case.

Key Takeaways:
✅ Record-Triggered Flow (C) is the only viable declarative option for after-delete actions.

🚫 Avoid deprecated tools (Process Builder) or limited tools (Workflow Rules).

Explanation:

- When multiple triggers exist for the same object and event, Salesforce does not guarantee the execution order.
- While triggers may often execute in a certain sequence, Salesforce does not officially document or enforce a specific order.
- Developers should avoid relying on execution order and instead use logic within triggers or consolidate triggers into a single trigger per object to control execution flow.

Would you like guidance on best practices for managing multiple triggers? 😊

❌ Why the other options are incorrect:
B. Executed in the order they are modified

❌ There is no such behavior defined in Salesforce documentation.
C. Triggers are executed alphabetically by trigger name

❌ While it may appear to happen that way in some cases, this is not guaranteed by Salesforce.
D. Triggers are executed in the order they are created

❌ Again, this is not documented behavior and should not be relied upon.

Key Takeaway:
✅ Never rely on trigger execution order—assume it’s unpredictable.

Explanation:

- Since each company can report multiple bugs, and each bug can be reported by multiple companies, this is a many-to-many relationship.
- Salesforce does not support direct many-to-many relationships, so a junction object is required to link Bug__c and Account.
- The junction object will have two lookup fields, one to Bug__c and one to Account, allowing flexible reporting on which companies reported which bugs.

❌ Why the other options are incorrect:
A. Roll-up summary field of Bug__c on Account

❌ Only works with master-detail relationships, and only rolls up child data — doesn’t allow many-to-many.
C. Lookup field on Bug__c to Account

❌ This creates a one-to-many relationship: one bug to many accounts is not supported with just one lookup.
D. Master-detail field on Bug__c to Account

❌ Also creates a one-to-many relationship: each bug could belong to only one account.

Key Takeaways:

✅ Junction object (B) is the only way to model many-to-many relationships in Salesforce.
🚫 Other options force one-to-many relationships, violating the requirement.