Salesforce Certified Platform Developer I (SALESFORCE-PD1) SALESFORCE-PD1 Questions 451–488 | Page 7/7

451

MCQmedium

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?

A.initMethod="{!init}"

B.action="{!init}"

C.onLoad="{!init}"

D.loadAction="{!init}"

AnswerB

Correct because the action attribute invokes a controller method on page load.

Why this answer

The action attribute on <apex:page> executes a controller method when the page is requested.

Full explanation →

452

MCQeasy

Which tool is best for automating a process that requires UI interaction, such as a wizard screen?

A.Future Method

B.Flow Builder

C.Batch Apex

D.Apex Trigger

AnswerB

Screen flows are specifically for user interaction.

Why this answer

Flows provide the Screen component for user-interactive processes.

Full explanation →

453

Multi-Selecthard

During the Salesforce order of execution, which THREE actions occur AFTER the system executes 'after' triggers? (Choose three.)

Select 3 answers

A.Execution of Assignment Rules.

B.Execution of escalation rules and roll-up summary field calculations.

C.Execution of Workflow rule field updates.

D.Execution of before insert triggers.

E.Execution of custom validation rules.

AnswersA, B, C

Correct. Assignment rules execute after after-triggers.

Why this answer

After triggers run towards the end of the transaction. Subsequent steps include assignment rules, workflow rules, and database commit.

Full explanation →

454

MCQhard

A developer has a Queueable Apex job that needs to query large volumes of data and perform updates. To optimize performance and avoid heap size limits, what is the best practice when querying records inside a Queueable Apex job?

A.Assign all queried records to a single global List variable in the class.

B.Set the method execution context to read-only using @ReadOnly.

C.Implement the Database.Batchable interface instead of Queueable.

D.Use a SOQL for-loop to iterate over query results chunk by chunk.

AnswerC, D

Correct. While Batchable is better for massive datasets, SOQL for-loops are the correct tool within Queueable to manage heap size.

Why this answer

Querying records using a SOQL Query Locator inside a batch or leveraging iterable queries helps manage memory efficiently, but for Queueable jobs, querying using SOQL for loops or batching ids helps avoid heap limits.

Full explanation →

455

MCQhard

A developer writes an Apex method that executes a SOQL query using user-supplied search parameters. How can the developer protect against SOQL injection vulnerabilities?

A.Execute the query using Database.queryWithBinds() with a restricted access modifier.

B.Use bind variables in the SOQL query instead of string concatenation.

C.Use String.escapeSingleQuotes() on all user inputs before concatenating into the query string.

D.Enclose all dynamic parameters in single quotes within the dynamic SOQL query string.

AnswerB

Bind variables safely parameterize user input, neutralizing SOQL injection risks.

Why this answer

Using bind variables in SOQL queries automatically sanitizes the input and prevents SOQL injection, unlike string concatenation.

Full explanation →

456

MCQeasy

An enterprise application requires nightly execution of an Apex class that processes records across multiple objects. Which interface must the Apex class implement?

A.Database.AllowsCallouts

B.Schedulable

C.Batchable

D.Queueable

AnswerB, D

The Schedulable interface allows classes to be run at scheduled intervals using Cron expressions.

Why this answer

To schedule an Apex job, the class must implement the Schedulable interface, specifically the execute(SchedulableContext sc) method.

Full explanation →

457

MCQmedium

A developer needs to write a unit test for a Queueable Apex class. How should the developer verify that the Queueable job executed successfully?

A.Use System.assertAsync() to poll the job status table.

B.Enclose the execution within Test.startTest() and Test.stopTest(), then query for the resulting record changes.

C.Query the AsyncApexJob table without Test.stopTest().

D.Call the queueable execute method directly in a try-catch block.

AnswerB

Test.stopTest() forces asynchronous jobs queued inside startTest() to execute before moving to subsequent lines of test code.

Why this answer

Queueable jobs executed inside Test.startTest() and Test.stopTest() run synchronously upon reaching stopTest(), allowing assertions to be checked immediately after.

Full explanation →

458

Multi-Selectmedium

Which THREE of the following are true about Apex test data setup?

Select 3 answers

A.@TestSetup methods run once per test class

B.Test data is automatically committed to the database

C.Tests can use existing data from the org if 'SeeAllData=true' is set

D.Test data must be inserted into the database to be queryable

E.Test classes can only use data created within the same method

AnswersA, C, D

This is the correct behavior for @TestSetup.

Why this answer

Data setup should use @TestSetup where possible, avoid using actual production data, and be isolated from the database.

Full explanation →

459

MCQmedium

A developer needs to execute a dynamic SOQL query where the object name and fields are determined at runtime. Which method should be used?

A.Record.query()

B.System.query()

C.SOQL.query()

D.Database.query()

AnswerD

Database.query evaluates and executes dynamic SOQL strings.

Why this answer

Database.query() allows execution of dynamically constructed SOQL query strings.

Full explanation →

460

MCQmedium

A developer is working with a Lightning Web Component that uses the @wire decorator to provision data from an Apex method. The Apex method depends on a property that changes dynamically. How should the property be prefixed to signal reactivity to the wire service?

A.Enclose the property name in curly braces ({})

B.Prefix the property name with a dollar sign ($)

C.Prefix the property name with an ampersand (&)

D.Prefix the property name with an underscore (_)

AnswerB

Correct. Prefixing a property with $ informs the wire service to re-run when the property value changes.

Why this answer

Properties passed to a @wire adapter that are reactive must be prefixed with a dollar sign ($).

Full explanation →

461

Multi-Selectmedium

A developer is writing an Apex trigger and needs to ensure proper bulkification. Which TWO practices should the developer follow to avoid governor limits? (Choose two.)

Select 2 answers

A.Use single record DML statements inside a standard for-loop.

B.Hardcode record IDs to query specific test records.

C.Perform SOQL queries and DML operations outside of loops.

D.Annotate the trigger with @future to ensure asynchronous bulk processing.

E.Use Trigger context variables such as Trigger.new to process collections of records.

AnswersC, E

Correct. Queries and DML inside loops quickly exhaust governor limits.

Why this answer

Bulkification requires processing data in collections (lists/sets) and placing all DML and SOQL operations outside of loops.

Full explanation →

462

MCQhard

An Apex transaction performs a DML operation, followed by a callout to an external REST API, followed by another DML operation. What exception will Salesforce throw?

A.CalloutException

B.AsyncException

C.LimitException

D.SystemException

AnswerA

Making a callout after a DML operation in the same synchronous transaction throws a CalloutException.

Why this answer

Salesforce throws a CalloutException when a DML operation has occurred before a callout in the same transaction, to prevent database locks.

Full explanation →

463

MCQeasy

Which primitive data type in Apex can represent a specific point in time, including both date and time values?

A.Date

B.Time

C.Datetime

D.Timestamp

AnswerC

Datetime represents a combined date and time value.

Why this answer

The Datetime data type represents both a date and a time in Apex.

Full explanation →

464

MCQhard

A developer is implementing a custom pagination mechanism in a Lightning Web Component. The component uses an Apex controller method that returns a list of records. Which technique prevents excessive heap size and improves performance when dealing with large datasets?

A.Fetch all records in a single transaction and slice the array in JavaScript.

B.Store the entire dataset in browser local storage for client-side manipulation.

C.Use the @wire decorator with an unbounded query and enable auto-caching.

D.Use server-side pagination passing page offset and limit parameters to the Apex controller.

AnswerD

Correct because server-side pagination limits governor limits and data transfer.

Why this answer

Implementing server-side pagination with OFFSET and LIMIT or using standard database query locators in Apex is best practice.

Full explanation →

465

MCQhard

A developer needs to iterate over a map of Account IDs to Account sObjects and perform processing on each value. Which loop construct is valid Apex?

A.for(KeyValue kv : myMap.entrySet()) { ... }

B.for(Account acc : myMap) { ... }

C.for(Account acc : myMap.values()) { ... }

D.for(Id id : myMap.iterator()) { ... }

AnswerC

Calling .values() on a map returns a List of the sObjects, which can be iterated directly.

Why this answer

Iterating over map values is done using map.values() in a for-loop: for(Account acc : myMap.values()).

Full explanation →

466

Multi-Selecthard

Which THREE practices are considered security best practices when developing custom Visualforce pages to prevent Cross-Site Scripting (XSS)? Choose 3 answers.

Select 3 answers

A.Use standard Visualforce components like <apex:outputText> which automatically HTML-escape output by default.

B.Disable sharing on all controller classes.

C.Set escape="false" on all output components to ensure proper rendering.

D.Use String.escapeJavaScript() when rendering user input inside JavaScript contexts.

E.Encode untrusted user input using JSENCODE or HTMLENCODE helper functions.

AnswersA, D, E

Standard components escape output safely.

Why this answer

Preventing XSS in Visualforce involves escaping output, using standard components which escape by default, and encoding untrusted data.

Full explanation →

467

Multi-Selecthard

A developer is troubleshooting a Batch Apex job that fails intermittently. Which THREE methods or properties are part of the Database.BatchableContext interface available in batch execution? (Choose three.)

Select 3 answers

A.getId()

B.getAssociatedId()

C.getChildJobId()

D.getApex龄JobId() / getJobId() / getAsyncApexJobId() - wait, getAsyncApexJobId() is valid.

E.getJobId()

AnswersA, D, E

Correct. getId() returns the ID of the BatchApexWorker or job.

Why this answer

Database.BatchableContext provides methods to get job IDs and batch IDs during execution.

Full explanation →

468

MCQeasy

A developer is writing an Apex method and needs to store a collection of unique email addresses while maintaining fast lookup times. Which collection should the developer choose?

A.List<String>

B.Queue<String>

C.Map<String, Integer>

D.Set<String>

AnswerD

Sets inherently prevent duplicate values and offer optimized lookup performance.

Why this answer

Sets in Apex store unique elements and provide efficient membership testing methods like contains().

Full explanation →

469

MCQmedium

How can you run tests for a specific namespace using the CLI?

A.Using the --package flag.

B.Using the --namespace flag.

C.You cannot filter by namespace.

D.By running all tests.

AnswerB

Correct flag.

Why this answer

The CLI supports filtering tests by namespace.

Full explanation →

470

MCQmedium

A developer needs to query all Contact records, including those that have been deleted from the database via the Recycle Bin. Which SOQL clause must be added?

A.INCLUDING DELETED

B.FOR VIEW

C.FOR REFERENCE

D.ALL ROWS

AnswerD

ALL ROWS includes deleted records currently in the Recycle Bin and archived activities.

Why this answer

ALL ROWS must be appended to a SOQL query to include records in the Recycle Bin (deleted records) and archived tasks/events.

Full explanation →

471

Multi-Selectmedium

When comparing Flow Builder decision points and Apex trigger logic, which THREE statements are valid design considerations? (Choose THREE.)

Select 3 answers

A.Apex triggers are executed after all Flow Builder automations have completed.

B.Apex triggers provide superior control for complex exception handling and multi-object transaction orchestration.

C.Flow Builder allows administrators to configure logic visually, reducing maintenance overhead for non-developers.

D.Flow Builder cannot invoke Apex actions.

E.Record-Triggered Flows can execute either before or after the record is saved to the database.

AnswersB, C, E

Apex offers advanced programming constructs for complex logic.

Why this answer

Flows are declarative, easier to maintain, and execute within governor limits, whereas Apex handles complex integrations and high-volume data manipulations.

Full explanation →

472

MCQmedium

A developer needs to query all Contact records, including those that have been moved to the Recycle Bin. Which SOQL keyword should be used?

A.ALL ROWS

B.WITH RECYCLE_BIN

C.SYSTEM MODE

D.INCLUDE DELETED

AnswerA

ALL ROWS retrieves records from the Recycle Bin.

Why this answer

The ALL ROWS clause in SOQL allows queries to return deleted records (from the Recycle Bin) as well as archived tasks and events.

Full explanation →

473

MCQeasy

A developer needs to ensure that a Lightning Web Component can be placed on a Record Page for an Account in the Lightning App Builder. What must be configured in the component's metadata configuration file?

A.<target>lightning__HomePage</target>

B.<target>lightning__RecordPage</target>

C.<target>lightning__Tab</target>

D.<target>lightningCommunity__Default</target>

AnswerB

Correct because lightning__RecordPage enables the component for record pages.

Why this answer

The target configuration must include lightning__RecordPage and specify the appropriate object support.

Full explanation →

474

MCQmedium

A developer implemented a Queueable Apex class that performs heavy processing. During testing, the developer wants to verify whether the asynchronous job has finished executing before running dependent unit test assertions. What should the developer use?

A.Test.startTest() and Test.stopTest() block around the enqueueJob call

B.AsyncApexJob query inside a loop with Thread.sleep()

C.A custom countdown latch pattern using platform cache

D.System.assertAsyncExecution() method

AnswerA

Test.stopTest() forces asynchronous code to execute synchronously within the test context.

Why this answer

Developers use Test.startTest() and Test.stopTest() in unit tests to force all asynchronous jobs enqueued within the block to execute synchronously before proceeding.

Full explanation →

475

Multi-Selectmedium

Which TWO options represent valid ways to instantiate and populate a Set of Strings in Apex? Choose 2 options.

Select 2 answers

A.Set<String> s = new Set<String>(); s.add('A');

B.Set<String> s = new Set<String>('A', 'B');

C.Set<String> s = Set.valueOf('A,B');

D.Set<String> s = ['A', 'B'];

E.Set<String> s = new Set<String>{'A', 'B'};

AnswersA, E

Sets can be instantiated empty and populated using the add method.

Why this answer

Sets can be instantiated with new Set<String>() and populated with add() or addAll().

Full explanation →

476

MCQhard

When using the Salesforce CLI to deploy, what is the 'check-only' flag used for?

A.To validate the metadata without saving it to the org.

B.To force the deployment despite test failures.

C.To skip the compilation check.

D.To run only the tests.

AnswerA

Provides a dry run.

Why this answer

It validates the deployment without committing changes to the target org.

Full explanation →

477

MCQhard

A developer has an Aura component that needs to communicate with an unrelated Lightning Web Component located on the same Lightning page. Which feature should the developer implement?

A.Lightning Message Service (LMS)

B.Aura Component Events (app events)

C.A shared JavaScript closure via window globals

D.Direct DOM traversal using document.querySelector()

AnswerA

Correct because LMS enables communication between disparate components across the DOM.

Why this answer

The Lightning Message Service (LMS) allows communication between Visualforce pages, Aura components, and Lightning Web Components across the DOM.

Full explanation →

478

MCQmedium

A developer is building a Lightning Web Component that includes user input fields. To adhere to best practices for accessibility and SLDS form styling, how should form inputs be structured?

A.Use standard HTML inputs without associated label elements.

B.Use <table> tags for layout alignment of form fields.

C.Use SLDS form element containers with corresponding <lightning-input> or HTML input elements paired with explicit labels.

D.Apply inline CSS display:flex directly to raw text areas.

AnswerC

Correct because proper form structure ensures accessibility and SLDS compliance.

Why this answer

Form elements should be wrapped in slds-form-element with proper label and input associations.

Full explanation →

479

MCQmedium

A developer needs to run a batch job that queries records and updates them. What is the default batch size if no optional batch size parameter is specified in Database.executeBatch()?

A.200

B.50

C.2000

D.500

AnswerA

200 is the default chunk size for batch apex.

Why this answer

The default batch size for Database.executeBatch() is 200 records if not specified.

Full explanation →

480

MCQeasy

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?

A.renderedCallback

B.constructor

C.connectedCallback

D.disconnectedCallback

AnswerC

This hook is executed when the component is inserted into the DOM.

Why this answer

connectedCallback() is invoked when a component is inserted into the DOM.

Full explanation →

481

MCQhard

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?

A.At the end of the test method automatically without stopTest.

B.Immediately when enqueued.

C.Only when explicitly mocked via HttpCalloutMock.

D.When Test.stopTest() is executed.

AnswerD

Test.stopTest() forces all asynchronous processes enqueued within the test block to run synchronously.

Why this answer

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

Full explanation →

482

Multi-Selectmedium

A developer needs to query records using SOSL in Apex. Which THREE components are syntactically required in a valid SOSL statement? (Choose three.)

Select 3 answers

A.The RETURNING clause specifying sObjects and fields to return.

B.The GROUP BY clause for aggregate calculations.

C.The IN clause specifying where to search (e.g., IN ALL FIELDS).

D.The FIND clause with search terms or query string.

E.The FROM clause specifying the primary sObject.

AnswersA, C, D

RETURNING is required to define which sObjects and fields are retrieved in the search result.

Why this answer

SOSL queries require the FIND clause with search terms, the IN clause specifying search groups, and the RETURNING clause specifying objects and fields.

Full explanation →

483

MCQhard

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?

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

B.Total number of SOQL queries issued (100)

C.Total heap size allocated (6 MB)

D.Total number of DML statements issued (150)

AnswerB

Doing a query per record in a loop violates the 100 SOQL queries per transaction governor limit.

Why this answer

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

Full explanation →

484

MCQhard

A developer has an Apex trigger that fires on Account update. Inside the trigger, it calls a future method to update related Contact records. During testing with 150 Account records modified simultaneously, the developer receives a System.LimitException: Too many future calls. What is the cause of this exception?

A.The total daily asynchronous limit was reached.

B.Future methods cannot be invoked from inside an Apex trigger context.

C.The trigger exceeded the maximum limit of 50 future method calls per Apex transaction.

D.The future method tried to execute a SOQL query exceeding the limit.

AnswerC

Correct. Triggers processing bulk updates can easily exceed the per-transaction limit of 50 future calls.

Why this answer

Future methods cannot be called from within other asynchronous contexts or inside triggers when the trigger processes more records than the future call limit allows per transaction (e.g. max 50 future calls per transaction).

Full explanation →

485

Multi-Selectmedium

A developer is creating an Aura component that interacts with Salesforce data. Which TWO tags or features are valid in the Aura framework? (Choose TWO)

Select 2 answers

A.<aura:iteration items="{!v.items}" var="item">

B.<template for:each={items} for:item="item">

C.<aura:attribute name="myAttr" type="String" />

D.<lwc:databind property="{!v.val}" />

E.import { LightningElement } from 'lwc';

AnswersA, C

Correct because aura:iteration iterates over collections in Aura.

Why this answer

aura:attribute and aura:iteration are valid tags in Aura markup.

Full explanation →

486

Multi-Selecthard

Which THREE factors influence deployment success?

Select 3 answers

A.The number of users.

B.Profile/Permission Set permissions.

C.Dependent components.

D.Test coverage.

E.The color of the UI.

AnswersB, C, D

Required for access.

Why this answer

Tests, dependencies, and profile permissions are critical.

Full explanation →

487

Multi-Selecthard

A developer is designing an asynchronous architecture using Batch Apex. Which THREE considerations must be kept in mind regarding Batch Apex behavior? (Choose THREE.)

Select 3 answers

A.The maximum batch size query locator limit is 200 records maximum.

B.Up to 5 batch jobs can be in execution concurrently for a single organization.

C.Batch Apex automatically executes synchronously if triggered from a Visualforce controller.

D.Batch jobs placed in the queue when the active limit is reached enter the Flex Queue in Holding status.

E.Implementing Database.Stateful ensures member variables retain their values across all transaction chunks.

AnswersB, D, E

The concurrent batch execution limit is 5.

Why this answer

Batch apex jobs are queued in the Flex queue, can execute up to 5 concurrent jobs, and can maintain state using Stateful.

Full explanation →

488

Multi-Selectmedium

Which TWO of the following are valid deployment tools?

Select 2 answers

A.Salesforce CLI.

B.Change Sets.

C.System Log.

D.Developer Console Debugger.

E.Apex Test Runner.

AnswersA, B

Valid tool.

Why this answer

Change Sets and Salesforce CLI are standard tools.

Full explanation →

Salesforce Certified Platform Developer I (SALESFORCE-PD1) (SALESFORCE-PD1) — Questions 451–488