Salesforce PDI Online Practice Questions and Exam Preparation

Salesforce PDI Online Questions & Answers

• Question 211:

  A developer must implement a CheckPaymentProcessor class that provides check processing payment capabilities that adhere to what is defined for payments in the Payment Processor interface.

  

  Which implementation is correct to use the PaymentProcessor interface class?

  

  A. Public class CheckPaymentProcessor implements PaymentProcessor { public void pay(Decimal amount) {}}
  B. Public class CheckPaymentProcessor implements PaymentProcessor { public void pay(Decimal amount);}
  C. Public class CheckPaymentProcessor extends PaymentProcessor { public void pay(Decimal amount);}
  D. Public class CheckPaymentProcessor extends PaymentProcessor { public void pay(Decimal amount) {}}
  A. Public class CheckPaymentProcessor implements PaymentProcessor { public void pay(Decimal amount) {}}

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  Explanation

  The class correctly uses implements PaymentProcessor

  The pay method matches the interface signature exactly

  The method includes a body, which is required when implementing an interface in Apex (even if the body is currently empty)

  Important note (exam tip)

  An empty method body is valid in Apex

  The compiler only requires that the method is implemented, not that it contains logic

  So from an Apex syntax and certification-exam perspective, this is a valid and correct implementation.

• Question 212:

  A develop created these three roll-up summary fields on the custom object. Project_c:

  Total_Timesheets_c Total_Approved_Timesheets_c Total_Rejected_Timesheet_c

  The developer is asked to create a new field that should the ratio between rejected and approved timesheet for a given project.

  What are two benefits of choosing a formula held instead of an Apex trigger to fulfill the request? Choose 2 answers

  A. A test class will validate the formula field during deployment.
  B. A formula field will trigger existing automation when deployed.
  C. A formula field will calculate the retroactively for existing records
  D. Using a formula field reduces maintenance overhead.
  B. A formula field will trigger existing automation when deployed.
  C. A formula field will calculate the retroactively for existing records

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  Explanation

• Question 213:

  A developer wants to allow administrators to update configuration values without deploying code.

  Which feature should be used?

  A. Custom labels
  B. Custom settings
  C. Static variables
  D. Hardcoded constants
  B. Custom settings

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  Explanation

  Custom settings allow administrators to manage configuration data declaratively and modify values without requiring code changes or deployments. They can be accessed from Apex and support organization-wide or user-specific values. Static variables and hardcoded constants require code changes and redeployment to update values, making them inflexible. Custom labels are intended for user-facing text and localization rather than configuration logic.

• Question 214:

  The Account object in an organization has a master-detail relationship to a child object called Branch.

  The following automations exist:

  1. Roll-up summary fields 2. Custom validation rules 3. Duplicate rules

  developer created a trigger on the Account object.

  Which two things should the developer consider while testing the trigger code? Choose 2 answers

  A. Rollup summary fields can cause the parent record to go through Save.
  B. Duplicate rules are executed once all DML operations commit to the database.
  C. The trigger may fire multiple times during a transaction.
  D. The validation rules will cause the trigger to fire again.
  A. Rollup summary fields can cause the parent record to go through Save.
  C. The trigger may fire multiple times during a transaction.

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  Explanation

  A. Roll-up summary fields can cause the parent record to go through Save:

  When a roll-up summary field on a parent object (like Account) is updated due to changes in child records (like Branch), the parent record (Account) is implicitly saved again.

  This can result in the execution of the trigger on the parent object. Developers must consider this behavior to avoid unintended recursion or infinite loops.

• Question 215:

  For which three items can a trace flag be configured? Choose 3 answers

  A. Apex Class
  B. Flow
  C. User
  D. Visualforce
  E. Apex Trigger
  A. Apex Class
  C. User
  E. Apex Trigger

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  Explanation

  Option A (Apex Class): Trace flags can be configured for specific Apex classes to debug issues during their execution.

  Option C (User): Trace flags can be set for specific users to debug issues occurring in their transactions.

  Option E (Apex Trigger): Trace flags can be set for specific triggers to debug execution.

  Not Suitable:

  Option B (Flow): Trace flags cannot be configured for Flows directly.

  Option D (Visualforce): Trace flags are not used to debug Visualforce pages directly.

• Question 216:

  How should a developer write unit tests for a private method in an Apex class?

  A. Use the SeeAllData annotation.
  B. Add a test method in the Apex class.
  C. Mark the Apex class as global.
  D. Use the @TestVisible annotation.
  D. Use the @TestVisible annotation.

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  Explanation

  The @TestVisible annotation allows private methods or variables to be accessed from test classes without changing their access level. SeeAllData is unrelated to method visibility, test methods cannot be added to non-test Apex classes, and marking a class as global does not expose private methods.

• Question 217:

  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

  A. Lightning Web Components
  B. Visualforce Components
  C. Visualforce Pages
  D. Aura Components
  A. Lightning Web Components
  D. Aura Components

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  Explanation

  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.

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

• Question 218:

  What is the result of the following code snippet?

  

  A. Accounts are inserted.
  B. Account is inserted.
  C. 200 Accounts are inserted.
  D. 201 Accounts are inserted.
  B. Account is inserted.

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  Explanation

  The loop runs from 0 through 200 inclusive, which results in 201 iterations. An insert is executed in each iteration, so 201 Account records are created.

  In Apex, inserting the same sObject instance multiple times inside a loop does not result in only one insert. Each insert acct; statement executes a separate DML operation. Because the loop runs multiple times, Salesforce attempts to insert a record on each iteration. The platform does not deduplicate DML operations based on object reference.

  However, this code will actually fail before completing all iterations due to governor limits, because it performs DML inside a loop. The common misconception behind option B is assuming Salesforce inserts the record only once, but that is not how Apex DML works.

  Why people think B is correct They incorrectly assume Salesforce tracks the object instance and inserts it only once. Apex does not do this.

  Key takeaway DML inside a loop executes on every iteration; Salesforce does not collapse repeated inserts into a single operation.

• Question 219:

  Given the following Apex statement:

  Account myAccount = [SELECT Id, Name FROM Account);

  What occurs when more than one Account is returned by the SOQL query?

  A. The variable, myaccount, is automatically cast to the List data type.
  B. An unhandled exception is thrown and the code terminates.
  C. The query fails and an error is written to the debug log.
  D. The first Account returned is assigned to myAccount.
  B. An unhandled exception is thrown and the code terminates.

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  Explanation

  The SOQL query assigns its result directly to a single sObject variable (Account myAccount). If the query returns more than one record, Salesforce throws a QueryException because the system cannot automatically cast multiple results to a single sObject.

  Not Suitable:

  Option A: The variable cannot be automatically cast to a list.

  Option C: The query itself does not fail but throws an exception.

  Option D: The first record is not automatically assigned.

• Question 220:

  Provide question feedback here (optional):

  

  Based on this code, what is the value of x?

  A. 4
  B. 1
  C. 2
  D. 3
  A. 4

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  Explanation

  The variable isOK is declared but not initialized, so its value is null. The if-else conditions check for specific values of isOK (true or false), but since it is null, none of those conditions are satisfied. The program defaults to the else block, assigning 4 to x.