SALESFORCE-PD1 Practice Exam 3 — 20 Questions

Question 1

Which THREE requirements must be met when implementing a custom Lightning Web Component pagination control? Choose 3 answers.

Accepted Answer

Slice the master dataset array based on current offset and limit calculations.. Option A is correct because a custom LWC pagination control must compute the visible subset of records by slicing the master dataset array using the current offset (page number × page size) and the page size limit, since LWC has no built-in pagination primitive. Option C is correct because the Next and Previous buttons must be disabled when boundary conditions are reached — Previous at page 1 and Next at the last page — to prevent out-of-range navigation and provide correct UX. Option D is correct because the component must track the current page number and page size as reactive properties (e.g., @track or standard reactive fields) so that changes trigger re-rendering and recomputation of the sliced data. Option B is incorrect because Visualforce's standardSetController is a Visualforce/Apex construct and cannot be used inside LWC JavaScript; pagination in LWC is handled client-side or via Apex methods. Option E is incorrect because mutating the server database on every page click is unnecessary and harmful — pagination should only change the client-side view, not persist data on each navigation.

Answer

Use standard Visualforce standardSetController inside the LWC JavaScript.

Answer

Directly mutate the server database on every page click.

Question 2

A developer is implementing a Batch Apex class to process 500,000 Contact records. Which method defines the starting point and retrieves the records to be processed?

Accepted Answer

Database.QueryLocator start(Database.BatchableContext BC). The start method of a Database.Batchable class returns either a Database.QueryLocator or an Iterable that defines the records to be processed.

Answer

void execute(Database.BatchableContext BC, List<SObject> scope)

Answer

void finish(Database.BatchableContext BC)

Answer

Database.BatchableContext start(Database.BatchableContext BC)

Question 3

A developer needs to chain asynchronous jobs. Which interface allows for a single job to be queued from within the execution of another?

Accepted Answer

Queueable. Queueable Apex allows for chaining jobs by calling System.enqueueJob within the execute method.

Answer

Batchable

Answer

Schedulable

Answer

Future

Question 4

An enterprise application requires real-time integration where outgoing callouts must be triggered from an Apex trigger. What architectural pattern must the developer use?

Accepted Answer

Future method annotated with @future(callout=true) invoked from an after trigger.. Triggers cannot make direct synchronous callouts, so they must invoke an asynchronous mechanism like a future method with callout=true.

Answer

Batch Apex execute method without queueing.

Answer

Direct synchronous HTTP callout inside the before insert trigger.

Answer

Validation rule containing an endpoint URL.

Question 5

A developer is creating a reusable LWC utility and needs to invoke an Apex method imperatively. The method accepts a record ID parameter. What is the correct way to pass this parameter in JavaScript?

Accepted Answer

Pass the parameter as an object with property names matching the Apex method parameters: getAccount({ accountId: recordId }). When invoking an Apex method imperatively from LWC, parameters must be passed as a single object where the keys match the Apex method parameter names exactly. For an Apex method like getAccount(Id accountId), the JavaScript call should be getAccount({ accountId: recordId }). This ensures the correct mapping of values to parameters.

Answer

Pass the parameter as a positional string argument: getAccount({recordId})

Answer

Bind the parameter using the @api decorator inside the JavaScript function body.

Answer

Assign the parameter to the window.apexParams object prior to invocation.

Question 6

Which trigger context variable should a developer use to access the map of old record versions prior to the update operation?

Accepted Answer

Trigger.oldMap. Trigger.oldMap provides a map of IDs to the old versions of the SObject records for update and delete triggers.

Answer

Trigger.old

Answer

Trigger.newMap

Answer

Trigger.new

Question 7

A developer implements a Queueable class that makes callouts and needs to test it using Test.startTest() and Test.stopTest(). When does the asynchronous queueable job execute during a unit test?

Accepted Answer

When Test.stopTest() is executed.. Asynchronous code executed inside Test.startTest() and Test.stopTest() runs synchronously when Test.stopTest() is called.

Answer

At the end of the test method automatically without stopTest.

Answer

Immediately when enqueued.

Answer

Only when explicitly mocked via HttpCalloutMock.

Question 8

Which TWO features of @isTest(SeeAllData=true) should a developer be aware of?

Accepted Answer

It makes tests results dependent on the org's existing data.. It grants access to all org data and can lead to unexpected test results.

Answer

It speeds up test execution.

Answer

It is required for testing standard objects.

Answer

It ignores all governor limits.

Question 9

A developer wants to inspect the code coverage of individual classes directly within the Salesforce Developer Console. Under which tab can the developer view this breakdown?

Accepted Answer

Tests tab. The Tests tab in the Developer Console displays test execution status, test results, and code coverage percentages by class.

Answer

Query Editor tab

Answer

DOM Inspector tab

Answer

Logs tab

Question 10

A developer creates a parent Lightning Web Component containing a child component. The parent needs to call a public method defined inside the child component. How is this accomplished?

Accepted Answer

Use this.template.querySelector('c-child-component').publicMethodName() in the parent component.. In LWC, a parent can call a public method on a child component by querying the child element from the parent's template and invoking the method directly. The child must expose the method with the @api decorator, and the parent uses this.template.querySelector('c-child-component') to obtain the element reference, then calls the method on it. This is the documented pattern for parent-to-child method invocation.

Answer

Use the publish() method of the Lightning Message Service.

Answer

Update a shared reactive property passed down via @api.

Answer

Dispatch an event from the parent and listen to it in the child component.

Question 11

Which THREE items are best practices when setting up test data using @TestSetup methods? (Choose three.)

Accepted Answer

Perform time-consuming operations or bulk data generation once to avoid hitting governor limits in separate test methods.. Option A is correct because @TestSetup runs once per test class and its resulting data is available to every test method, so performing expensive or bulk data generation there conserves governor limits (DML statements, CPU time, SOQL queries) that would otherwise be consumed repeatedly in each test method. Option C is correct because creating parent records such as Accounts in @TestSetup lets individual test methods query those records and build child records (for example Contacts or Opportunities) against them, which is the intended pattern for reusable seed data. Option E is correct because Salesforce wraps each test method in its own transaction and rolls back any changes made during that method, so modifications to @TestSetup records in one test method do not leak into another; the @TestSetup data is restored to its original state for the next method. Option B is not a best practice because record IDs are assigned at runtime and hardcoding them makes tests brittle and non-portable across orgs; tests should query the records instead. Option D is not a best practice because callouts are not allowed in @TestSetup (and generally not in test methods without a mock), so external REST callouts would fail; seed data should be created locally or via mock callouts.

Answer

Hardcode specific record IDs assigned during @TestSetup into downstream test assertions.

Answer

Call external REST callouts inside the @TestSetup method to fetch live seed data.

Question 12

How can a developer inspect the state of a private variable within a class during unit testing?

Accepted Answer

Use the @TestVisible annotation.. The @TestVisible annotation allows a test method in the same class or a test class in the same namespace to access private or protected members of the annotated class without changing the member's visibility for production code. This preserves encapsulation in production while enabling white-box testing of internal state. It can be applied to private variables, methods, and inner classes.

Answer

Change the class to @isTest.

Answer

There is no way to inspect private variables.

Answer

Make the variable public.

Question 13

Which SLDS utility class should a developer use to add a standard margin around a container?

Accepted Answer

slds-m-around_medium. SLDS spacing classes follow the pattern slds-m-{sides}-{size}.

Answer

slds-grid

Answer

slds-padding_medium

Answer

slds-margin-all

Question 14

A developer needs to implement a custom logging framework. Which Apex data type should be used to represent a variable that can store any primitive value, sObject, or collection dynamically?

Accepted Answer

Object. The Object data type is the base data type in Apex and can hold any value, including primitives, sObjects, and collections.

Answer

Any

Answer

Variant

Answer

Dynamic

Question 15

A developer is writing a custom wire adapter or working with custom data in LWC and needs to manually provision data or force a refresh of wire data. Which function should be imported from lightning/uiRecordApi or related wire modules?

Accepted Answer

refreshApex. refreshApex is used to imperatively refresh data provisioned by an Apex wire adapter.

Answer

reloadRecord

Answer

updateRecordCache

Answer

getRecordRefresh

Question 16

When should a developer use a record-triggered flow instead of a scheduled path in a flow?

Accepted Answer

When actions need to occur instantly upon record creation.. Record-triggered flows execute immediately upon record creation or update, whereas scheduled paths run at a specific time offset.

Answer

When processing millions of historical records nightly.

Answer

When making external web service callouts synchronously.

Answer

When actions need to execute 30 days after a contract is signed.

Question 17

What happens if a test class has a method annotated with @testSetup that fails to insert data?

Accepted Answer

The entire test class fails to execute.. When a method annotated with @testSetup fails — for example, because a DML insert throws an exception — the entire test class is aborted and no test methods execute. The @testSetup method runs once before all test methods in the class, so its failure prevents the shared test data from being created and the platform marks the whole class as failed.

Answer

The test execution proceeds, but without data.

Answer

The platform ignores the @testSetup failure.

Answer

Only the first test method fails.

Question 18

A developer needs to pass a custom SObject record with related child lists into an asynchronous execution context. Which asynchronous Apex feature supports passing non-primitive types such as custom Apex objects or sObject collections?

Accepted Answer

Queueable Apex. Queueable Apex supports member variables of non-primitive types, including sObjects and custom classes.

Answer

Scheduled Apex

Answer

Future methods

Answer

Trigger asynchronous execution blocks

Question 19

What is the result of a compilation error in an Apex class during deployment?

Accepted Answer

The deployment fails entirely.. When Apex code contains a compilation error (syntax error, invalid reference, missing dependency), the deployment of that component fails. In a Change Set or Metadata API deployment, a compilation failure causes the entire deployment to fail—Salesforce does not partially deploy a class with errors or skip it silently. The deployment must be corrected and retried.

Answer

The class is deployed without the code.

Answer

The class is deployed with warnings.

Answer

The class is skipped.

Question 20

A developer is creating a Visualforce page that overrides the standard Account View action. Which attribute must be included in the <apex:page> tag to ensure standard controller functionality?

Accepted Answer

standardController="Account". The standardController attribute on <apex:page> binds the page to a Salesforce standard controller for a specific object, giving the page access to that object's fields, standard actions, and record context. When overriding a standard action like Account View, the page must declare standardController="Account" so the platform knows which object's standard controller to instantiate and how to pass the record Id. Without it, the page has no controller and cannot leverage standard save, view, or record-binding behavior.

Answer

controller="Account"

Answer

object="Account"

Answer

recordId="Account"