SALESFORCE-PD1 Practice Test 13 — 15 Questions

Question 1

A developer is building a Lightning Web Component and needs to execute code as soon as the component is inserted into the DOM. Which lifecycle hook should be used?

Accepted Answer

connectedCallback. The connectedCallback lifecycle hook is called when a component is inserted into the DOM. It is the appropriate place to execute initialization code that requires the component to be in the document, such as accessing the DOM or making imperative Apex calls.

Answer

renderedCallback

Answer

constructor

Answer

disconnectedCallback

Question 2

A developer needs to ensure that an Apex trigger fires only during the after insert context. Which check should be placed at the beginning of the trigger body?

Accepted Answer

if (Trigger.isAfter && Trigger.isInsert). Checking Trigger.isAfter and Trigger.isInsert ensures the code runs only during the desired trigger event.

Answer

if (Trigger.size > 0)

Answer

if (Trigger.isExecuting)

Answer

if (Trigger.isBefore && Trigger.isUpdate)

Question 3

A developer creates a Trigger on the Account object that performs a SOQL query inside a for loop. While testing with bulk data operations, the developer encounters a governor limit exception. Which limit is most likely exceeded?

Accepted Answer

Total number of SOQL queries issued (100). Executing SOQL queries inside a loop without bulkification easily causes the total number of SOQL queries issued per transaction (100) to be exceeded.

Answer

Maximum CPU time on a Salesforce server (10,000 milliseconds)

Answer

Total heap size allocated (6 MB)

Answer

Total number of DML statements issued (150)

Question 4

A developer is building a Lightning Web Component that must be made available for use on Lightning Record Pages. Which configuration tag must be included in the component's metadata file?

Accepted Answer

lightning__RecordPage. To expose an LWC on a Lightning Record Page, the component's .js-meta.xml file must include the lightning__RecordPage tag. This target tells the platform that the component is eligible to be dragged onto record pages in Lightning App Builder, and it is the specific configuration required for record-page availability.

Answer

lightning__UtilityBar

Answer

lightning__GlobalAction

Answer

lightning__AppPage

Question 5

You are debugging a performance issue in an Apex trigger. You want to see the database resource usage. Which debug log level should you set for the Database category?

Accepted Answer

FINEST. To see detailed database resource usage in a debug log, the Database category must be set to FINEST, which logs SOQL queries, DML operations, and their execution details including row counts and timing. FINEST provides the most granular level of database activity, which is necessary for performance debugging.

Answer

ERROR

Answer

INFO

Answer

DEBUG

Question 6

A developer wants to style a Lightning Web Component using the Salesforce Lightning Design System (SLDS). What is the recommended way to include SLDS styling?

Accepted Answer

Use standard SLDS utility classes directly in the component's HTML template.. Lightning Web Components are designed to work natively with SLDS, and the recommended approach is to apply SLDS utility classes (like slds-button, slds-grid, slds-m-around_medium) directly in the component's HTML template. Salesforce automatically makes SLDS available to LWC without any import, and using utility classes ensures visual consistency with the Lightning Experience and future SLDS updates.

Answer

Import the full SLDS stylesheet explicitly as a static resource.

Answer

Apply standard Bootstrap classes to match Salesforce themes.

Answer

Use inline styles exclusively for all components.

Question 7

Why does a test fail if it tries to perform a callout without Test.setMock()?

Accepted Answer

The platform disallows live callouts in test context.. Salesforce blocks live HTTP callouts during test execution to keep tests deterministic, fast, and isolated from external systems. Any callout attempted in a test method without a mock throws a System.CalloutException stating that callouts are not allowed from test methods. Test.setMock() registers a mock implementation (typically implementing HttpCalloutMock or WebServiceMock) so the callout is intercepted and returns canned responses instead of hitting the network.

Answer

Governor limits are exceeded.

Answer

The mock server is not found.

Answer

The callout method is not public.

Question 8

A developer is creating a Lightning Web Component and needs to iterate over a list of items in the HTML template. Which directive should be used?

Accepted Answer

for:each. LWC templates use the for:each directive to iterate over arrays, with for:item specifying the iteration variable and for:index providing the optional index. Each iterated element must have a unique key attribute (typically the record Id) to help the framework's diffing algorithm efficiently update the DOM.

Answer

repeat:for

Answer

apex:repeat

Answer

aura:iteration

Question 9

A developer is writing a Visualforce page that uses a custom controller. The page needs to execute an action method as soon as the page loads, without requiring user interaction. Which attribute on <apex:page> should be used?

Accepted Answer

action="{!init}". The `action` attribute on `<apex:page>` specifies a controller method that is executed when the page loads, before rendering, without user interaction. It is the standard Visualforce mechanism for initialization logic, such as loading data or setting up state. The correct syntax is `action="{!init}"`, where `init` is a public method in the custom controller.

Answer

initMethod="{!init}"

Answer

onLoad="{!init}"

Answer

loadAction="{!init}"

Question 10

An Apex trigger needs to prevent deletion of Account records that have related active Contacts. When should this check occur?

Accepted Answer

Before Delete. Before delete triggers are used to validate and prevent the deletion of records based on related criteria.

Answer

After Insert

Answer

After Update

Answer

Before Insert

Question 11

A developer has a requirement to perform a callout to an external ERP system immediately when an Opportunity reaches Closed Won. The developer decides to use a future method from an after update trigger. What is a primary architectural limitation of this approach?

Accepted Answer

Future methods cannot accept sObject instances as parameters, requiring ID serialization/deserialization and additional SOQL queries.. Future methods cannot accept sObjects as arguments, requiring the trigger to pass primitive IDs, and they cannot guarantee exact execution order when multiple asynchronous requests fire.

Answer

Future methods cannot make callouts to external systems.

Answer

Future methods execute synchronously in the same database transaction.

Answer

Future methods are limited to 1 callout per transaction.

Question 12

Which component of the MVC design pattern in Salesforce Lightning Web Components (LWC) represents the data model and business logic layer?

Accepted Answer

Apex classes and database objects. In Salesforce, the Model layer corresponds to the database and Apex controllers/SOQL queries handling data.

Answer

HTML template files

Answer

CSS style sheets

Answer

JavaScript controller files

Question 13

A developer needs to retrieve Salesforce data in a Lightning Web Component without writing imperative Apex. Which module should be imported to use the wire service for standard record data?

Accepted Answer

lightning/uiRecordApi. lightning/uiRecordApi provides wire adapters to get, create, update, or delete record data.

Answer

lightning/platformShowErrorToast

Answer

lightning/navigation

Answer

lightning/apex

Question 14

A developer is analyzing a debug log and notices that it is truncated because it exceeded the maximum file size limit. Which action should the developer take to capture only the relevant Apex code execution details without exceeding the limit?

Accepted Answer

Adjust the Trace Flag log levels to reduce verbosity for unnecessary categories like Database and Workflow.. Refining log categories and levels ensures only necessary debug statements are recorded, preventing truncation.

Answer

Increase the maximum log file size in company profile settings.

Answer

Disable all validation rules in the org temporarily.

Answer

Switch the debug log perspective to 'Development Harvester'.

Question 15

A developer is writing a Batch Apex class to update 50,000 records. Which method must be implemented to define the scope of records to be processed?

Accepted Answer

start. The start method in the Database.Batchable interface returns a QueryLocator or Iterable to define the records.

Answer

initialize

Answer

execute

Answer

finish