SALESFORCE-PD1 Practice Test 16 — 15 Questions

Question 1

A developer needs to store a collection of Account IDs where duplicates are automatically prevented and lookups are extremely fast. Which collection type should the developer use?

Accepted Answer

Set<Id>. Sets in Apex store unique elements and provide very fast lookups by value using methods like contains().

Answer

Map<Id, Id>

Answer

Queue<Id>

Answer

List<Id>

Question 2

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 3

Which context variable should a developer use in an Apex trigger to determine if the trigger was fired by an update operation rather than an insert?

Accepted Answer

Trigger.isUpdate. Trigger.isUpdate returns true if the trigger was fired due to an update operation.

Answer

Trigger.isExecuting

Answer

Trigger.isBefore

Answer

Trigger.isInsert

Question 4

An Apex trigger needs to prevent deletion of Account records that have related active Contacts. When should this check occur?

Accepted Answer

Before Delete. Before delete triggers are used to validate and prevent the deletion of records based on related criteria.

Answer

After Insert

Answer

After Update

Answer

Before Insert

Question 5

A developer is writing a SOQL query to find accounts where the billing country starts with 'United'. Which operator should be used?

Accepted Answer

LIKE 'United%'. The LIKE operator is used in SOQL for wildcard matching, using '%' as the wildcard character.

Answer

MATCHES

Answer

STARTS_WITH

Answer

INCLUDES

Question 6

A developer needs to retrieve 10 Account records starting from the 21st record to implement pagination in a custom component. Which SOQL clause should be used?

Accepted Answer

LIMIT 10 OFFSET 20. SOQL supports pagination using LIMIT and OFFSET clauses.

Answer

LIMIT 20 OFFSET 10

Answer

RANGE 20 TO 30

Answer

SKIP 20 TAKE 10

Question 7

An Apex trigger needs to execute logic only when a specific custom field (Discount_Percent__c) on an Opportunity changes its value. Which comparison should the developer use?

Accepted Answer

Trigger.new[i].Discount_Percent__c != Trigger.oldMap.get(Trigger.new[i].Id).Discount_Percent__c. Comparing Trigger.new[i].Discount_Percent__c with Trigger.oldMap.get(Trigger.new[i].Id).Discount_Percent__c ensures code runs only when the field value is modified during an update.

Answer

Trigger.isChanged('Discount_Percent__c')

Answer

Trigger.new[i].Discount_Percent__c != Trigger.old[i].Discount_Percent__c

Answer

Trigger.new[i].Is_Modified__c == true

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

What is the maximum CPU time limit for a synchronous Apex transaction in a developer edition org?

Accepted Answer

10,000 milliseconds. The synchronous CPU time limit is 10,000 milliseconds for standard transactions.

Answer

60,000 milliseconds

Answer

120,000 milliseconds

Answer

5,000 milliseconds

Question 10

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 11

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 12

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 13

A developer writes a SOQL query using the FORMAT() keyword. What is the purpose of this keyword?

Accepted Answer

To return number, date, and currency fields formatted according to the user's locale. FORMAT() formats currency, date, time, and numerical fields according to the current user's locale settings.

Answer

To ensure SOQL query syntax is validated before execution

Answer

To format query results into JSON format

Answer

To convert string fields into uppercase

Question 14

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 15

Which SOQL aggregate function should a developer use to count the exact number of rows returned by a query without retrieving the records into memory?

Accepted Answer

COUNT(). The COUNT() function returns the number of rows matching the query criteria efficiently as an integer.

Answer

TOTAL()

Answer

SUM()

Answer

SIZE()