SALESFORCE-PD1 Developer Fundamentals Practice Test 3 — 15 Questions

Question 1

A developer needs to ensure that a custom Apex controller safely checks whether the current user has read access to the 'Salary__c' field on the 'Employee__c' object before displaying it in a Lightning Web Component. Which method should the developer use?

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

Accepted Answer

Schema.sObjectType.Employee__c.fields.Salary__c.isAccessible(). The Security class and sObjectDescribe methods provide mechanisms to check CRUD and FLS in Apex before querying or displaying data.

Answer

Employee__c.Salary__c.getDescribe().isCreateable()

Answer

User.hasReadAccess('Employee__c', 'Salary__c')

Answer

ApexPages.currentPage().getParameters().get('Salary__c')

Question 2

An enterprise application requires dynamic execution of a SOQL query where the object type and fields to query are determined at runtime based on user input. Which feature should the developer use to prevent SOQL injection vulnerabilities?

Accepted Answer

String.escapeSingleQuotes(). Dynamic SOQL queries must use binding variables or sanitize input using String.escapeSingleQuotes() to prevent malicious SOQL injection.

Answer

System.assert()

Answer

JSON.serialize()

Answer

Database.setSavepoint()

Question 3

A developer creates a custom Lightning Web Component that includes a wired property to retrieve account records. The component needs to react dynamically when the record data is updated via another component on the page. Which decorator should be used on the JavaScript property to receive reactive updates?

Accepted Answer

@wire. The @wire decorator in Lightning Web Components provisions a stream of data to a property or function reactively.

Answer

@api

Answer

@track

Answer

@readonly

Question 4

A developer needs to retrieve a list of Accounts along with their related Contacts using a single SOQL query in Apex. Which query structure is syntactically correct?

Accepted Answer

SELECT Id, Name, (SELECT Id, LastName FROM Contact) FROM Account. In Salesforce SOQL, when querying parent-to-child relationships, the subquery must use the child relationship name (plural, usually ending in '__r' for custom objects or the standard plural name like 'Contacts' for standard objects), but the FROM clause of the subquery must specify the object name itself (e.g., 'FROM Contacts' is wrong; it must be 'FROM Contact'). Therefore, option C uses the correct object name in the subquery ('FROM Contact'), while option D uses the relationship name incorrectly in the FROM clause of the subquery.

Answer

SELECT Id, Name, Contacts.Id, Contacts.LastName FROM Account

Answer

SELECT Id, Name, Contact__r.Name FROM Account

Answer

SELECT Id, Name, (SELECT Id, LastName FROM Contacts) FROM Account

Question 5

A developer is implementing a custom logging framework in Apex. Due to high transaction volumes, multiple asynchronous log entries need to be queued without hitting the maximum number of queueable jobs allowed in a single transaction. What is the execution limit for chained Queueable jobs?

Accepted Answer

Only one child job can be chained from a given Queueable job in a non-test context.. In a non-toxic/non-test context, you can only call System.enqueueJob once from within a Queueable job's execute method, meaning only one child job can be chained from a given Queueable execution.

Answer

Queueable jobs cannot be chained under any circumstances.

Answer

Up to 50 child jobs can be chained in a single transaction.

Answer

There is no limit to the number of chained queueable jobs.

Question 6

A developer wants to retrieve the developer name of the current user's profile in Apex. Which object relationship should be queried via SOQL?

Accepted Answer

SELECT Profile.Name FROM User WHERE Id = :UserInfo.getUserId(). The User object relates to the Profile object through the ProfileId foreign key field.

Answer

SELECT Name FROM Profile WHERE UserId = :UserInfo.getUserId()

Answer

SELECT ProfileId.Name FROM User WHERE Id = :UserInfo.getUserId()

Answer

SELECT ProfileName FROM User WHERE Id = :UserInfo.getUserId()

Question 7

A developer needs to convert a JSON string representing a list of Account records into an actual List<Account> in Apex. Which method should be used?

Accepted Answer

(List) JSON.deserialize(jsonString, List.class). The correct method is JSON.deserialize(jsonString, List.class). The cast (List) is redundant because the method already returns the specified type, and the syntax provided in option B is slightly malformed for a standard Apex call.

Answer

JSON.parse(jsonString)

Answer

List<Account>.parse(jsonString)

Answer

JSON.deserializeUntyped(jsonString)

Question 8

A developer needs to write a secure SOQL query that prevents unauthorized data exposure by respecting both sharing rules and field-level security. Which TWO approaches can the developer combine to achieve this? (Choose two.)

Accepted Answer

Include the 'WITH SECURITY_ENFORCED' clause in the SOQL query.. Sharing rules are enforced via class keywords, while FLS can be enforced using WITH SECURITY_ENFORCED or Security.stripInaccessible.

Answer

Disable FLS checks in user profile settings before executing queries.

Answer

Execute queries inside an asynchronous @future method.

Answer

Use the 'without sharing' keyword on all transaction controllers.

Question 9

A developer is writing an Apex trigger that needs to execute logic only when records are updated and a specific custom field 'Status__c' changes from 'Draft' to 'Submitted'. Which THREE elements are required to implement this check correctly? (Choose three.)

Accepted Answer

Compare the prior status value with the new status value from Trigger.new.. Option C is correct because detecting a change from 'Draft' to 'Submitted' requires comparing the old value against the new value, and Trigger.new holds the incoming updated records whose Status__c must equal 'Submitted'. Option D is correct because the logic must only run on updates, which is confirmed via Trigger.isUpdate (or by checking Trigger.isExecuting in the appropriate context) so the code does not fire on insert, delete, or undelete. Option E is correct because Trigger.oldMap.get(record.Id).Status__c retrieves the prior field value keyed by record Id, which is the reliable way to confirm the old status was 'Draft' before the update. Option A is not needed since Trigger.isInsert would target creation events, not the update transition being detected. Option B is incorrect because iterating Trigger.old alone gives only prior values and cannot supply the new 'Submitted' status needed for the comparison.

Answer

Use the Trigger.isInsert context variable to capture the initial draft creation.

Answer

Iterate through Trigger.old instead of Trigger.new.

Question 10

A developer implements a custom Apex controller for a Visualforce page that performs DML operations. Which THREE best practices should be followed to ensure robust data management and security? (Choose three.)

Accepted Answer

Check object CRUD and field-level security permissions before executing DML.. Secure controllers must check CRUD/FLS, enforce sharing rules, and handle DML errors gracefully.

Answer

Hardcode record type IDs directly in the controller class.

Answer

Bypass all triggers by using custom settings during Visualforce execution.

Question 11

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

Accepted Answer

The RETURNING clause specifying sObjects and fields to return.. In Salesforce SOSL, a valid query must begin with the FIND clause, which supplies the search terms or query string, so option D is required. The IN clause is also mandatory because it defines the search scope, such as IN ALL FIELDS, IN NAME FIELDS, or IN EMAIL FIELDS, making option C correct. The RETURNING clause is required as well because it specifies the sObjects and fields whose matching records should be returned, so option A is correct. Option B is not required because GROUP BY is used only for aggregate calculations and is not part of the minimal SOSL syntax. Option E is incorrect because SOSL does not use a FROM clause like SOQL; the object context is expressed through RETURNING instead.

Answer

The GROUP BY clause for aggregate calculations.

Answer

The FROM clause specifying the primary sObject.

Question 12

A developer needs to ensure that an Apex class can be invoked by a Lightning Web Component and can also process a large number of records without hitting governor limits. The class must be exposed to the component and must perform its logic asynchronously. Which annotation should the developer use on the method?

Accepted Answer

@AuraEnabled(cacheable=false) with Queueable. The method must be callable from a Lightning Web Component, so it needs @AuraEnabled. Since it must handle large data volumes asynchronously, it should delegate work to a Queueable job. Using @AuraEnabled(cacheable=false) permits DML and enqueuing, while the Queueable handles bulk processing in a separate transaction, respecting governor limits.

Answer

@Future

Answer

@InvocableMethod

Answer

@AuraEnabled

Question 13

A developer is building an Apex class that must process a large number of records and perform callouts to an external system. The developer wants to ensure the solution is bulk-safe and respects governor limits. Which two techniques should the developer use? (Choose two.)

Accepted Answer

Use Queueable Apex with the Database.AllowsCallouts interface to make callouts asynchronously.. Batch Apex and Queueable Apex both support asynchronous processing and can make callouts when the class implements Database.AllowsCallouts. Batch Apex is ideal for very large data volumes, while Queueable offers more flexibility with complex types and chaining. Both respect governor limits by running in separate transactions.

Answer

Use @future(callout=true) for each record to make callouts individually.

Answer

Use the @InvocableMethod annotation to make callouts from a Flow.

Answer

Perform callouts directly in a trigger to ensure real-time synchronization.

Question 14

A developer needs to write an Apex method that queries all Account records where the Industry field is 'Technology'. The method must be bulk-safe and should not exceed governor limits. Which SOQL query is most appropriate?

Accepted Answer

List<Account> accs = [SELECT Id, Name FROM Account WHERE Industry = 'Technology'];. A static SOQL query that selects all matching records into a list is bulk-safe and efficient. It avoids the overhead and injection risks of dynamic SOQL, and it returns all records without arbitrary limits, making it suitable for bulk processing.

Answer

for (Account a : [SELECT Id FROM Account WHERE Industry = 'Technology']) { ... }

Answer

List<Account> accs = [SELECT Id, Name FROM Account WHERE Industry = 'Technology' LIMIT 1];

Answer

List<Account> accs = Database.query('SELECT Id, Name FROM Account WHERE Industry = \'Technology\'');

Question 15

A developer needs to write an Apex class that performs a callout to an external web service and then updates a custom object record based on the response. The callout must be made asynchronously to avoid mixed DML errors. Which approach should the developer use?

Accepted Answer

Use Queueable Apex with the Database.AllowsCallouts interface to perform the callout and then update the record.. Queueable Apex with Database.AllowsCallouts is the best choice because it runs asynchronously, can make callouts, and then perform DML in a separate transaction. This avoids mixed DML errors and governor limits associated with synchronous callouts.

Answer

Use a synchronous Apex method with HTTP callout and then use Database.update to update the record.

Answer

Use a Batch Apex class that implements Database.AllowsCallouts and updates records in the finish method.

Answer

Use a synchronous Apex method with @future(callout=true) to perform the callout and update the record.