SALESFORCE-PD1 Practice Test 4 — 25 Questions

Question 1

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?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Use server-side pagination passing page offset and limit parameters to the Apex controller.. Implementing server-side pagination with OFFSET and LIMIT or using standard database query locators in Apex is best practice.

Answer

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

Answer

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

Answer

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

Question 2

Which TWO tools or features should a developer consider when choosing between Flow Builder and Apex for business logic automation? (Choose two.)

Accepted Answer

Apex is better suited for complex algorithmic logic, advanced error handling, and reusable utility classes.. Option A is correct because Apex is the programmatic choice for complex algorithmic logic, advanced error handling (try/catch, custom exceptions, savepoints), and reusable utility classes that can be invoked across triggers, classes, and even Flows via @InvocableMethod. Option B is correct because Flow Builder is declarative, so administrators can build and modify record-triggered, screen, and scheduled flows quickly without code, improving maintainability and reducing dependency on developers. Option C is wrong because Flows can absolutely call subflows and invocable Apex actions. Option D is wrong because Apex triggers are not universally slower than record-triggered flows; performance depends on implementation, and Apex is often faster for bulk and complex operations. Option E is wrong because large nightly asynchronous batch processing is a classic Apex use case (Batch Apex, Queueable, Schedulable), not a Flow Builder requirement.

Answer

Flows cannot trigger subflows or call invocable actions.

Answer

Apex triggers execute significantly slower than record-triggered flows in all scenarios.

Answer

Flow Builder is required when processing millions of records nightly in asynchronous batches.

Question 3

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

Accepted Answer

Use standard Visualforce components like <apex:outputText> which automatically HTML-escape output by default.. Preventing XSS in Visualforce involves escaping output, using standard components which escape by default, and encoding untrusted data.

Answer

Disable sharing on all controller classes.

Answer

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

Question 4

Which THREE of the following are benefits of using the Salesforce CLI for deployment?

Accepted Answer

Supports automated deployment scripts. CLI offers automation, version control integration, and environment consistency.

Answer

Allows bypassing validation rules in production

Answer

Automatically converts all code to Lightning Web Components

Question 5

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?

Accepted Answer

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

Answer

List<String>

Answer

Queue<String>

Answer

Map<String, Integer>

Question 6

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?

Accepted Answer

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

Answer

AsyncApexJob query inside a loop with Thread.sleep()

Answer

A custom countdown latch pattern using platform cache

Answer

System.assertAsyncExecution() method

Question 7

A developer needs to ensure that a custom logging operation runs asynchronously and can be monitored using job IDs. Which interface is best suited?

Accepted Answer

Queueable. Queueable Apex provides job IDs upon enqueueing, allowing for tracking and monitoring.

Answer

Schedulable

Answer

Database.AllowsCallouts

Answer

Database.Batchable

Question 8

An Apex trigger processes a list of Case records. The developer wants to group the cases by their AccountId. Which data structure is best suited for this grouping?

Accepted Answer

Map>. A Map where the key is the AccountId (Id) and the value is a List of Cases (List) allows efficient grouping of child records by parent ID.

Answer

List<Map<Id, Case>>

Answer

Set<Map<Id, Case>>

Answer

Map<Id, Case>

Question 9

An application has complex business logic where an Apex class called from a trigger needs to know whether it was invoked from an insert or update trigger context. How can the developer determine this?

Accepted Answer

Check Trigger.isInsert and Trigger.isUpdate boolean variables.. Trigger.isInsert and Trigger.isUpdate context variables indicate whether the current trigger execution was caused by an insert or update operation.

Answer

Query the Audit Trail object for the active transaction ID.

Answer

Check if Trigger.old is null; if null, it is always an update.

Answer

Inspect the exception stack trace using System.debug().

Question 10

A developer wants to ensure that a custom Apex controller method can be invoked securely from a Lightning Web Component. Which annotation must be applied to the method?

Accepted Answer

@AuraEnabled. @AuraEnabled enables methods to be called from Lightning components and can also cache data.

Answer

@InvocableMethod

Answer

@RemoteAction

Answer

@WebService

Question 11

A developer is writing a batch Apex class. During the execute method, a record fails validation. The developer wants to ensure that successfully processed records in the same batch are committed while failing records are logged without aborting the entire batch. How should the DML be performed?

Accepted Answer

Database.insert(records, false). Using Database.insert(records, false) performs partial DML success, allowing valid records to commit while returning an array of save results for error handling.

Answer

try-catch block around a standard insert statement

Answer

Database.upsert(records, true)

Answer

Standard insert statement (e.g., insert records;)

Question 12

What is the correct file extension for an Apex class created in Salesforce DX?

Accepted Answer

.cls. Apex class files use the .cls extension, accompanied by a .cls-meta.xml metadata file.

Answer

.apex

Answer

.controller

Answer

.trigger

Question 13

A developer writes an Apex method with the 'inherited sharing' keyword. What is the behavior of this class when invoked from a class declared with 'with sharing'?

Accepted Answer

It enforces sharing rules because the calling class has 'with sharing'.. Inherited sharing classes execute with sharing when invoked from a with sharing context, inheriting the caller's sharing rules.

Answer

It throws a compilation error because sharing modes conflict.

Answer

It executes in system mode without enforcing sharing rules.

Answer

It prompts the user to select a sharing mode at runtime.

Question 14

A developer writes a SOQL query to aggregate total opportunity amounts grouped by stage name. Which SOQL clause is required?

Accepted Answer

GROUP BY. Aggregate queries in SOQL require the GROUP BY clause when using functions like SUM(), COUNT(), or AVG().

Answer

HAVING BY

Answer

AGGREGATE BY

Answer

ORDER BY

Question 15

A developer writes a SOQL query to fetch Account records and wants to bind a list of strings called 'targetNames' as filter criteria. Which syntax is correct?

Accepted Answer

SELECT Id FROM Account WHERE Name IN :targetNames. Using IN :targetNames allows binding a collection variable directly into a SOQL WHERE clause.

Answer

SELECT Id FROM Account WHERE Name IN targetNames

Answer

SELECT Id FROM Account WHERE Name IN {targetNames}

Answer

SELECT Id FROM Account WHERE Name IN STRING.valueOf(targetNames)

Question 16

Which TWO triggers are executed during a record merge operation in Salesforce? (Choose two.)

Accepted Answer

Before Delete and After Delete triggers on the losing record.. Merging records deletes the loser record (firing delete triggers) and updates the winner record (firing update triggers).

Answer

Before Insert and After Insert triggers on the losing record.

Answer

Undelete triggers on both records.

Answer

Lead conversion triggers instead of merge triggers.

Question 17

An Apex trigger needs to check whether the current user has read access to the 'AnnualRevenue' field on the Account object before performing a calculation. Which method should the developer use?

Accepted Answer

Schema.sObjectType.Account.fields.AnnualRevenue.getDescribe().isAccessible(). Schema.sObjectType.Account.fields.AnnualRevenue.getDescribe().isAccessible() checks field-level security for the current user in Apex.

Answer

User.hasReadAccess('Account', 'AnnualRevenue')

Answer

Account.AnnualRevenue.getDescribe().isAccessible()

Answer

System.checkFieldAccess(Account.class, 'AnnualRevenue', 'Read')

Question 18

Which THREE statements are accurate regarding Apex transaction control and database savepoints? Choose 3 answers.

Accepted Answer

Database.setSavepoint() returns a Savepoint object reference.. Savepoints allow partial rollbacks within a single transaction using Database.setSavepoint() and Database.rollback().

Answer

Establishing a savepoint resets the SOQL query governor limit counter.

Answer

Rolling back to a savepoint clears all governor limit exceptions already thrown.

Question 19

A developer implements a Schedulable class to run a daily cleanup job. What is the maximum number of scheduled Apex jobs that can be simultaneously active in an org?

Accepted Answer

100. Salesforce enforces a strict limit of 100 simultaneous scheduled Apex jobs per org.

Answer

500

Answer

50

Answer

250

Question 20

A developer needs to find all records across multiple objects (Contact, Lead, and Account) that contain the exact phrase 'Acme Corp'. Which feature should be used?

Accepted Answer

SOSL FIND clause. SOSL (Salesforce Object Search Language) is designed for text searches across multiple objects simultaneously.

Answer

Database.query() with dynamic bindings

Answer

SOQL query with multiple WHERE clauses

Answer

Global Search API via REST