SALESFORCE-PD1 Developer Fundamentals Practice Test 5 — 15 Questions

Question 1

A developer is writing a trigger on the Contact object that needs to reference old field values during an update operation. In which trigger context variable are these previous values stored?

Accepted Answer

Trigger.old. Trigger.old contains a list of sObject records prior to the update or delete operation.

Answer

Trigger.new

Answer

Trigger.previousValues

Answer

Trigger.newMap

Question 2

What is the maximum number of SOQL queries that can be issued in a single synchronous Apex transaction?

Accepted Answer

100. The synchronous governor limit for SOQL queries is 100.

Answer

200

Answer

50000

Answer

50

Question 3

A developer needs to dynamically instantiate an sObject type based on a string variable representing the object name (e.g., 'Account'). Which method should be used?

Accepted Answer

Schema.getGlobalDescribe().get('Account').newSObject(). Schema.getGlobalDescribe().get('Account').newSObject() allows dynamic sObject creation from a string object name.

Answer

Type.forName('Account').newInstance()

Answer

Database.load('Account')

Answer

SObject.createInstance('Account')

Question 4

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?

Accepted Answer

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

Answer

AsyncException

Answer

LimitException

Answer

SystemException

Question 5

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 6

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?

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 7

Which Salesforce data model relationship type allows two objects to have a many-to-many relationship through a junction object?

Accepted Answer

Master-Detail Relationship. Master-Detail relationships on a junction object pointing to two parent objects establish a many-to-many relationship.

Answer

Hierarchical Relationship

Answer

Lookup Relationship

Answer

External Relationship

Question 8

Which collection type stores elements as key-value pairs in Apex?

Accepted Answer

Map. A Map stores key-value pairs where each unique key maps to a single value.

Answer

Set

Answer

Array

Answer

List

Question 9

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 10

A developer needs to determine if the current user has delete permissions on the Opportunity object in Apex before calling a deletion method. Which method should be used?

Accepted Answer

Schema.sObjectType.Opportunity.isDeletable(). Schema.sObjectType.Opportunity.isDeletable() checks if the current user has delete permission on the Opportunity object.

Answer

User.hasPermission('Opportunity', 'Delete')

Answer

System.hasDeleteAccess(Opportunity.class)

Answer

Opportunity.sObjectType.getDescribe().isDeletable()

Question 11

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?

Accepted Answer

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

Answer

INCLUDING DELETED

Answer

FOR VIEW

Answer

FOR REFERENCE

Question 12

An Apex trigger executes during a bulk insert of 300 records. To adhere to best practices regarding governor limits and bulkification, how should SOQL queries be written?

Accepted Answer

Query once outside the loop using a collection of IDs from Trigger.new. Queries must be written using bulkified collections, querying once outside of loops using bind variables for all records in Trigger.new.

Answer

Query inside a for-loop iterating over Trigger.new

Answer

Query each record individually using Limits.getQueries() checks

Answer

Use an asynchronous future method for every individual record

Question 13

Which Apex data type is best suited for storing monetary amounts with high precision?

Accepted Answer

Decimal. The Decimal data type is used for currency and precise numerical calculations in Apex.

Answer

Double

Answer

String

Answer

Integer

Question 14

A developer needs to convert a string variable containing an alphanumeric Salesforce ID into an ID primitive data type. Which approach is valid in Apex?

Accepted Answer

Id myId = myString;. Passing a string to the Id constructor (Id myId = (Id)myString; or Id myId = myString;) automatically casts or converts valid string IDs to the Id type.

Answer

Id myId = String.toId(myString);

Answer

Id myId = Id.valueOf(myString);

Answer

Id myId = Integer.valueOf(myString);

Question 15

What is the return type of a SOQL query that returns a single aggregate result, such as SELECT COUNT() FROM Account?

Accepted Answer

Integer. A SOQL query using COUNT() without a GROUP BY clause returns an Integer representing the row count.

Answer

AggregateResult

Answer

Decimal

Answer

List<SObject>