SALESFORCE-PD1 Practice Test 15 — 15 Questions

Question 1

Which primitive data type in Apex can represent a specific point in time, including both date and time values?

Accepted Answer

Datetime. The Datetime data type represents both a date and a time in Apex.

Answer

Date

Answer

Time

Answer

Timestamp

Question 2

An Apex trigger needs to prevent records from being saved if a specific validation condition fails. How should the developer reject the DML operation on a specific record?

Accepted Answer

record.addError('Validation failed.');. Adding an error message to a record sObject in Trigger.new (e.g., record.addError('Message')) prevents that record from saving and adds an error to the UI/transaction.

Answer

Trigger.rollback();

Answer

ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'Error'));

Answer

throw new ValidationException('Error');

Question 3

Which collection method is used to add all elements from one Set into another Set in Apex?

Accepted Answer

addAll(). The addAll() method is available on Set, List, and Map collections to add multiple elements at once.

Answer

merge()

Answer

combine()

Answer

putAll()

Question 4

An Apex trigger needs to prevent duplicate records from being inserted based on a custom external ID field. Which approach should the developer take to optimize query performance and respect governor limits?

Accepted Answer

Collect the external ID values into a Set, query once outside the loop, and use a Map for validation.. Collecting field values into a Set, querying existing records matching that Set in a single query outside of loops, and comparing in memory is the bulkified approach.

Answer

Use Database.upsert with strict mode enabled inside the trigger loop.

Answer

Query the database inside a for loop for every record in Trigger.new.

Answer

Use an asynchronous @future method to validate duplicates after insert.

Question 5

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 6

Which TWO types of triggers can be defined in Apex? Choose 2 options.

Accepted Answer

after trigger. Apex supports before triggers and after triggers executed around DML operations.

Answer

instead of trigger

Answer

commit trigger

Answer

validation trigger

Question 7

An Apex trigger needs to query related Account records for a list of newly inserted Contact records. What is the most robust way to handle the relationship query in SOQL to avoid governor limits?

Accepted Answer

Collect Account IDs into a Set and execute a single SOQL query outside the loop using the IN clause.. Using a parent-to-child or child-to-parent relationship query inside a single SOQL statement executed on the Trigger.new collection prevents hitting the SOQL query governor limit.

Answer

Access standard relationship fields directly without querying if the records are in Trigger.new.

Answer

Loop through each Contact and issue a separate SOQL query for its Account.

Answer

Use the Database.getQueryLocator method with Trigger.new.

Question 8

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 9

Which method is used to get the number of elements in an Apex List?

Accepted Answer

size(). The size() method returns the number of elements in a List, Set, or Map in Apex.

Answer

getNumElements()

Answer

length()

Answer

count()

Question 10

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 11

Which TWO collection interfaces or classes are provided in Apex? Choose 2 options.

Accepted Answer

Map. List and Map are core collection types in Apex.

Answer

Vector

Answer

Dictionary

Answer

Hashtable

Question 12

What is the primary purpose of the Model-View-Controller (MVC) design pattern implementation in Lightning Web Components (LWC)?

Accepted Answer

To separate data, user interface, and application logic into distinct components. MVC separates application data (Model), user interface (View), and business logic/event handling (Controller) to promote modularity and maintainability.

Answer

To convert Apex triggers into asynchronous jobs

Answer

To bypass Salesforce governor limits automatically

Answer

To enforce field-level security without writing code

Question 13

Which collection type in Apex stores elements as key-value pairs where each key maps to a single value?

Accepted Answer

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

Answer

Set

Answer

Queue

Answer

List

Question 14

A developer needs to query all Contact records, including those that have been moved to the Recycle Bin. Which SOQL keyword should be used?

Accepted Answer

ALL ROWS. The ALL ROWS clause in SOQL allows queries to return deleted records (from the Recycle Bin) as well as archived tasks and events.

Answer

WITH RECYCLE_BIN

Answer

SYSTEM MODE

Answer

INCLUDE DELETED

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)