SALESFORCE-PD1 Developer Fundamentals Practice Test 7 — 15 Questions

Question 1

A developer needs to write an Apex trigger that fires before an Account is inserted and accesses the value of the custom field 'Rating__c'. Which collection type is best suited to iterate over the incoming records in the trigger context variable?

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

Accepted Answer

List<Account>. Trigger.new provides a List of sObjects, making a standard List or for-loop iteration the correct approach for handling trigger context records.

Answer

Account[]

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Set<Account>

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Map<Id, Account>

Question 2

A developer has written an Apex method that executes a SOQL query to retrieve all Contacts associated with an Account. The method needs to be invoked securely without bypassing the user's organization-wide defaults and sharing settings. How should the developer execute this query?

Accepted Answer

Define the class using the 'with sharing' keyword.. By default, SOQL queries executed in Apex enforce user-level sharing rules unless the 'with sharing' keyword is explicitly omitted in a 'without sharing' class context.

Answer

Include the 'WITH SECURITY_ENFORCED' clause in the SOQL query.

Answer

Execute the query within a @future method.

Answer

Use the Schema.describeSObjects method before querying.

Question 3

An Apex trigger executes a query inside a for-loop to fetch related child records for every parent Account in Trigger.new. The developer notices that when a data load of 200 accounts occurs, the governor limit for total SOQL queries issued is exceeded. How should the developer refactor the code?

Accepted Answer

Collect the Account IDs in a Set and execute a single SOQL query outside the loop using the IN operator.. To avoid hitting the governor limit of 100 SOQL queries per transaction, queries must be moved outside of loops and bulkified using collections.

Answer

Annotate the trigger with @ReadOnly to increase the query limit.

Answer

Wrap the query in a try-catch block and catch the QueryException.

Answer

Use the Database.executeBatch method to process each account in a separate transaction.

Question 4

A developer wants to define a constant value in an Apex class that can be accessed globally without instantiating the class. Which combination of keywords should be used?

Accepted Answer

public static final. Constants in Apex are defined using the 'static' and 'final' keywords to ensure they belong to the class and cannot be modified.

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protected static

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private volatile

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global transient

Question 5

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?

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 6

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()

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JSON.serialize()

Answer

Database.setSavepoint()

Question 7

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

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@track

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@readonly

Question 8

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 Contacts) FROM Account. Parent-to-child relationships in SOQL are queried using a subquery within parentheses inside the SELECT clause.

Answer

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

Answer

SELECT Id, Name, Contact__r.Name FROM Account

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

Question 9

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>

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Queue<String>

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Map<String, Integer>

Question 10

A developer wants to retrieve up to 5 recently viewed records of any object type using SOSL. Which SOSL clause specifies the maximum number of records to return?

Accepted Answer

LIMIT 5. SOSL search results can be limited using the LIMIT clause at the end of the query statement.

Answer

TOP 5

Answer

MAX 5

Answer

ROWS 5

Question 11

A developer needs to assign a default value to a custom picklist field via Apex when creating a Lead record. What data type should be assigned to the picklist field in Apex?

Accepted Answer

String. Picklist fields in Salesforce are represented as Strings in Apex when assigned or retrieved via sObjects.

Answer

Boolean

Answer

PicklistEntry

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Integer

Question 12

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.. Queueable Apex supports chaining jobs, but synchronous transactions have strict limits on how many times a job can be chained consecutively.

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 13

A developer needs to check if a specific key exists in a Map<String, Decimal> before retrieving its value. Which Map method should be used?

Accepted Answer

containsKey(). The containsKey() method checks whether a specified key exists in a Map instance.

Answer

hasKey()

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contains()

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exists()

Question 14

A developer is writing a test class for an Apex trigger and needs to insert test Account records. Best practices recommend bypassing hardcoded IDs. Which annotation should be placed on the test setup method to create common test data efficiently?

Accepted Answer

@TestSetup. The @TestSetup annotation allows developers to create test records once and make them available for all test methods in the class.

Answer

@IsTest(SeeAllData=true)

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@TestVisible

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@RemoteAction

Question 15

An Apex trigger processes a large volume of Opportunity updates. The developer uses Database.update(opps, false) to allow partial success. How should the developer inspect the results to handle any failures?

Accepted Answer

Iterate over the returned List<Database.SaveResult> and check the isSuccess() method.. Database methods returning partial success provide a list of Database.SaveResult objects that contain error details.

Answer

Inspect the Trigger.errors context variable.

Answer

Wrap the Database.update call in a try-catch block and inspect the DMLException methods.

Answer

Query the AsyncApexJob object to check for error logs.