Salesforce DEX-450 Daily Practice Exam New 2025 Updated 202 Questions [Q47-Q61]

2月 17, 2025 管理者 0 コメント

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Salesforce DEX-450 Daily Practice Exam New 2025 Updated 202 Questions

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Salesforce DEX-450: Programmatic Development using Apex and Visualforce in Lightning Experience certification exam is a great way for developers to validate their skills and expertise in programmatic development. It covers a wide range of topics related to Apex and Visualforce development in the Lightning Experience and is a must-have for developers who want to advance their careers in the Salesforce ecosystem. With this certification, developers can demonstrate their ability to develop custom applications and automate business processes in Salesforce, which is essential for success in today’s competitive job market.

NO.47 The Account object has a custom formula field,Level__c, that is defined as a Formula(Number) with two decimal places. Which three are valid assignments? Choose 3.

Long myLevel = acct.Level__c;

Object myLevel = acct.Level__c;

Double myLevel = acct.Level__c;

Decimal myLevel = acct.Level__c;

Integer myLevel = acct.Level__c;

NO.48 Which statement describes the execution order when triggers are associated to the same object and event?

Triggers are executed in the order they are modified.

Trigger execution order cannot be guaranteed.

Triggers are executed alphabetically by trigger name.

Triggers are executed in the order they are created.

49位 A developer is creating an app that contains multiple Lightning web components.
One of the child components is used for navigation purposes. When a user clicks a button called Next in the child component, the parent component must be alerted so it can navigate to the next page.
How should this be accomplished?

Update a property on the parent.

Call a method in the Apex controller.

Fire a notification.

Create a custom event.

NO.50 Before putting an app into production, which step should be taken?

Run the production check feature via the web interface

Switch to a production database

Insure that you have installed a performance introspection add-on

Scale your dynos

NO.51 Candidates are reviewed by four separate reviewers and their comments and scores which range from 1 (lowest) to 5 (highest) are stored on a review record that is a detail record for a candidate what is the best way to indicate that a combined review score of 15 of better is required to recommend that the candidate come in for an interview?

Use a validation rule on a total score field on the candidate record that prevents a recommended field from being true if the total score is less than 15

Use a workflow rule to calculate the sum of the review scores and send an email to the hiring manager when the total is 15 or better

Use visual workflow to set a recommended field on the candidate whenever the cumulative review score is 15 or better

Use a rollup summary field to calculates the sum of the review scores, and store this in a total score field on the candidate

NO.52 In a single record, a user selects multiple values from a multi-select picklist.
How are the selected values represented in Apex?

As a List<String> with each value as an element in the list

As a String with each value separated by a comma

As a String with each value separated by a semicolon

As a Set<String> with each value as an element in the set

NO.53 A developer is asked to create a Visualforce page for Opportunities that allows users to save or merge the current record.
Which approach should the developer to meet this requirement?

A custom controller

A custom controller extension

Visualforce page JavaScript

Standard controller methods

NO.54 Which three Salesforce resources can be accessed from a Lightning web component?
答えを3つ選ぶ

SVG resources

Third-party web components

Content asset files

Static resources

All external libraries

NO.55 A developer created a custom order management app that uses an Apex class. The order is represented by an Order object and an Orderltem object that has a master-detail relationship to Order. During order processing, an order may be split into multiple orders.
What should a developer do to allow their code to move some existing Orderltem records to a new Order record?

Create a junction object between OrderItem and Order.

Select the Allow reparenting option on the master-detail relationship.

Change the master-detail relationship to an external lookup relationship.

Add without sharing to the Apex class declaration.

To allow moving existing OrderItem records to a new Order record in a master-detail relationship:
Option B: Select the Allow reparenting option on the master-detail relationship.
Steps:
Go to the master-detail field on OrderItem.
Edit the field and select “Allow reparenting”.
参考までに：
“To allow reparenting of the detail records, select ‘Allow reparenting’ in the master-detail relationship field definition.”
– Salesforce Help: Define Master-Detail Relationships
Why Other Options Are Incorrect:
Option A: A junction object is unnecessary since the relationship already exists.
Option C: Changing to an external lookup would not solve the problem and may introduce issues.
Option D: Adding without sharing does not affect the ability to reparent records in a master-detail relationship.

NO.56 What are three considerations when using the @InvocableMethod annotation in Apex?
答えを3つ選ぶ

Only one method using the @InvocableMethod annotation can be defined per Apex class.

A method using the @InvocableMathod annotation must define a return value,

A method using the @InvocableMethod annotation can have multiple input parameters.

A method using the @InvocablsMethod annotation must be declared as static.

A method using the @InvocableMathod annotation can be declared as Public Global.

When using the @InvocableMethod annotation in Apex, there are specific considerations to keep in mind:
Option A: Only one method using the @InvocableMethod annotation can be defined per Apex class.
True.
An Apex class can contain only one method annotated with @InvocableMethod.
This ensures that when the class is invoked from a flow or process, there is no ambiguity about which method to execute.
The method must be static because it is called without instantiating the class.
Static methods belong to the class rather than an instance of the class.
The method must be declared as public or global so that it is accessible outside the class, especially when invoked from flows or processes.
The method can define a return value, but it is not mandatory.
If a return value is provided, it must be a list of a supported data type.
The method can have only one parameter.
This parameter must be of a supported data type or a list of supported data types.
参考までに：
InvocableMethod Annotation
Option D: A method using the @InvocableMethod annotation must be declared as static.
True.
InvocableMethod Annotation Requirements
Option E: A method using the @InvocableMethod annotation can be declared as public or global.
True.
Access Modifiers for Invocable Methods
Incorrect Options:
Option B: A method using the @InvocableMethod annotation must define a return value.
False.
Invocable Method Return Types
Option C: A method using the @InvocableMethod annotation can have multiple input parameters.
False.
Invocable Method Parameters

NO.57 Which two are true regarding a Dyno? Choose 2 answers

Is a light weight VM used to run code on the Heroku Platform

Has the ability to sleep as a standard and performance Dyno

Is a lightweight Linux container used in a collection to run Heroku applications

Has Ephemeral filesystems and is rebooted every 24 hours.

NO.58 A lead developer creates an Apex interface called Laptop. Consider the following code snippet:
public class SilverLaptop{
//code implementation
How can a developer use the Laptop interface within the silverLaptop class?

NO.59 Universal Containers wants to back up all of the data and attachments in its Salesforce org once a month.
Which approach should a developer use to meet this requirement?

Schedule a report.

Define a Data Export scheduled

Use the Data Loader command line.

Create a Schedulable Apex class.

To back up all data and attachments in a Salesforce org, the standard approach is to use the Data Export Service.
Option B: Define a Data Export scheduled
Correct Answer.
The Data Export Service allows administrators to schedule a weekly or monthly export of all data and attachments.
The exported data can be downloaded as a set of CSV files and attachments in zip format.
参考までに：
Options Not Applicable:
Option A: Schedule a report.
Reports cannot export attachments and are limited to the data accessible via reporting.
Option C: Use the Data Loader command line.
While possible, it would require custom scripting and management.
Data Loader does not natively export attachments.
Option D: Create a Schedulable Apex class.
Writing custom Apex to export data and attachments is complex and unnecessary when standard tools exist.
結論
The developer should define a Data Export schedule to meet the backup requirement, which is Option B.

NO.60 A developer must create a DrawList class that provides capabilities defined in the Sortable and Drawable interfaces. public interface Sortable { void sort(); } public interface Drawable { void draw(); } Which is the correct implementation?

Public class DrawList implements Sortable, Implements Drawable {
public void sort() { /*implementation*/}
public void draw() { /*implementation*/}
]

Public class DrawList extends Sortable, Drawable {
public void sort() { /*implementation*/}
public void draw() { /*implementation*/}
}

Public class DrawList implements Sortable, Drawable {
public void sort() { /*implementation*/}
public void draw() { /*implementation*/}
}

Public class DrawList extends Sortable, extends Sortable, extends Drawable { public void sort() { /*implementation*/ } public void draw() { /* implementation */}

NO.61 What is the result of the following code?

The record will not be created and a exception will be thrown.

The record will be created and a message will be in the debug log.

The record will not be created and no error will be reported.

The record will be created and no error will be reported.

ローディング …

Salesforce DEX-450 is a certification exam that tests a candidate’s knowledge of programmatic development using Apex and Visualforce in Lightning Experience. DEX-450 exam is designed to evaluate the candidate’s understanding of Salesforce development best practices, Apex programming language, Visualforce, and Lightning components. The DEX-450 exam is intended for developers who work with Salesforce, and it is an excellent opportunity for them to prove their skills and expertise in programmatic development.

Test Engine to Practice DEX-450 Test Questions: https://www.topexamcollection.com/DEX-450-vce-collection.html