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Topics of Salesforce DEX-450 Exam
Aspirants must know the exam topics before they start of preparation. Because it will help them to prepare for the below concepts. DEX-450 exam will include the following topics:
1. Objects and Fields
Describe the capabilities of objects on the Salesforce platform Create a custom object Create custom fields Create relationship fields
2. Work Effectively with Custom Objects and Fields
Create formula fields Create roll-up summary fields Describe the capabilities of record types
3. Programming with Apex
Describe key aspects of Apex that differentiate it from other languages, such as Java and C# Describe why Apex transactions and governor limits must be considered when writing Apex Execute simple Apex Use the sObject data type, the primitive data types, and basic control statements in Apex
4. Use SOQL to Query Your Org's Data
Write a basic query using Salesforce's query language, SOQL Process the result of a query in Apex Create a query dynamically at run-time Use SOQL to Query - Parent-Child Relationships Describe a relationship query Write a query that traverses a child-to-parent relationship Write a query that traverses a parent-to-child relationship
5. DML Essentials
List the differences between the ways you can invoke DML operations Write Apex to invoke DML operations and handle DML errors
6. Trigger Essentials
Describe what a trigger is used for Describe the syntax of a trigger definition Use trigger context variables
7. Apex Class Essentials
Describe how Apex classes are used Define an Apex class Determine what data an Apex class can access
8. The Save Order of Execution and Apex Transactions
Describe key points in the Order of Execution Describe how triggers fit into and can be impacted by the Order of Execution Describe the lifecycle of an Apex Transaction Describe the memory lifecycle for static variables
9. Testing Essentials
Describe Apex's testing framework Create test data Write and run an Apex test
10. Testing Strategies
Describe practices for writing code that is easy to maintain and extend Write triggers and classes that assume batches of data as input Write code that works efficiently with the database, both in querying and using DML
11. Strategies for Designing Efficient Apex Solutions
Determine your code coverage percentages Create tests using best practices
12. Trigger Design Strategies
List declarative mechanisms you can use to implement complex business logic, for what types of problems they are best used, and their limitations Describe ways in which you can use declarative functionality to improve your programmatic solutions
13. Creating Visualforce Pages
Create a Visualforce page Reference a standard controller Launch a Visualforce page using a custom button Display data from a record in a Visualforce page
14. Exploring the View and Controller Layers of Visualforce
Create a Visualforce page Display related data Invoke standard controller actions
15. Working with Custom Controllers and Controller Extensions
Create controller extensions Create a custom controller Work with properties Use PageReferences Invoke custom methods in Visualforce pages 14.Working with List Controllers and SOSL Queries
Use a standard list controller in a Visualforce page Create a SOSL query Create a custom list controller
16. Visualforce Development Considerations
Determine whether a declarative solution exists for your requirements Describe common governor limit issues and security concerns Describe Visualforce strategies Testing Visualforce Controllers Describe how a Visualforce controller interacts with the view Write tests for controller constructors Write tests for action methods, getters, setters, and properties
NEW QUESTION # 47
Which two approaches optimize test maintenance and support future declarative configuration changes? Choose 2 answers.
- A. Create a method that creates valid records,then call this method within test methods.
- B. Create a methods that loads valid Account records from a static resources, then call this method within test methods.
- C. Create a method that queries for valid records, then call this method within test methods.
- D. Create a method that performs a callout for valid records, then call this method within test methods.
Answer: A,B
NEW QUESTION # 48
How is a controller and extension specified for a custom object named "Notice" on a Visualforce page?
- A.
- B.
- C.
- D.
Answer: D
NEW QUESTION # 49
Where are two locations a developer can look to find information about the status of asynchronous or future cals? Choose 2 answers
- A. Paused Flow Interviews component
- B. Apex Jobs (Missed)
- C. Apex Flex Queue (Missed)
- D. Time-Based Workflow Monitor
Answer: B,C
NEW QUESTION # 50
What is a considerations for running a flow in debug mode?
- A. When debugging a schedule-triggered flow, the flow starts only for one record.
- B. Callouts to external are not when debugging a flow.
- C. DML operations will be rolled back when the debugging ends.
- D. Clicking Pause allows an element to be replaced in the flow.
Answer: B
NEW QUESTION # 51
A developer has the following class and trigger code public class insurancerates{ public static final decimal smokercharge = 0.01; } trigger contacttrigger on contact (before insert){ insurancerates rates = new insurancerates(); decimal basecost=xxx; } Which code segment should a developer insert at the xxx to set the basecost variable to the value of the class variable smokercharge?
- A. Rates.smokercharge
- B. Rates.getsmokercharge()
- C. Insurancerates.smokercharge
- D. Contacttrigger.insurancerates.smokercharge
Answer: C
NEW QUESTION # 52
Which annotation exposes an Apex class as a RESTful web service?
- A. @RemoteAction
- B. @HttpInvocable
- C. @RestResource (urlMapping='/myService/*"')
- D. @Aurabnabled(cacheable=true)
Answer: C
NEW QUESTION # 53
A developer needs to create records for the object Property__c. The developer creates the following code block:List propertiesToCreate = helperClass.createProperties();try { // line 3 } catch (Exception exp ) { //exception handling }Which line of code would the developer insert at line 3 to ensure that at least some records are created, even if a few records have errors and fail to be created?
- A. insert propertiesToCreate;
- B. Database.insert(propertiesToCreate, System.ALLOW_PARTIAL);
- C. Database.insert(propertiesToCreate, false);
- D. Database.insert(propertiesToCreate);
Answer: C
NEW QUESTION # 54
Universal Containers has an order system that uses on Order Number to identify an order for customers service agents. Order records will be imported into Salesforce.
How should the "Order Number field be defined in Salesforce.
- A. Direct Lookup
- B. Indirect Lookup
- C. Lookup
- D. Number with External ID
Answer: D
NEW QUESTION # 55
What features are available when writing apex test classes?(Choose 2 Answers)
- A. The ability to set and modify the CreatedDate field in apex tests.
- B. The ability to set breakpoints to freeze the execution at a given point.
- C. The ability to write assertions to test after a @future method.
- D. The ability to select testing data using csv files stored in the system.
- E. The ability to select error types to ignore in the developer console.
Answer: A,D
NEW QUESTION # 56
Assuming that naze is 8 String obtained by an <apex:inpotText> tag on 8 Visualforce page, which two SOQL queries performed are safe from SOQL injection?
'Choose 2 answers
- A.
- B.
- C.
- D.
Answer: B,D
NEW QUESTION # 57
Potential home buyers working with a real estate company can make offers on multiple properties that are listed with the real estate company. Offer amounts can be modified; however, the property that has the offer cannot be modified after the offer is placed. What should be done to associate offers with properties in the schema for the organization?
- A. Create a lookup relationship in the property custom object to the offer custom object
- B. Create a master-detail relationship in the contact object to both the property and offer custom objects
- C. Create a lookup relationship in the offer custom object to the property custom object
- D. Create a master-detail relationship in the offer custom object to the property custom object
Answer: D
NEW QUESTION # 58
What is the accurate statement about with sharing keyword? choose 2 answers
- A. Either inner class or outer classes can be declared as with sharing but not both
- B. Inner class do not inherit the sharing setting from the container class
- C. Inner class inherit the sharing setting from the container class
- D. Both inner and outer class can be declared as with sharing
Answer: B,D
NEW QUESTION # 59
A business has a proprietary Order Management System (OMS) that creates orders from their website and fulfills the orders. When the order is created in the OMS, an integration also creates an order record in Salesforce and relates it to the contact as identified by the email on the order. As the order goes through different stages in the OMS, the integration also updates It in Salesforce. It is noticed that each update from the OMS creates a new order record in Salesforce.
Which two actions will prevent the duplicate order records from being created in Salesforce?
Choose 2 answers
- A. Use the order number from the OMS as an external ID.
- B. Ensure that the order number in the OMS is unique.
- C. Write a before trigger on the order object to delete any duplicates.
- D. Use the email on the contact record as an external ID.
Answer: B,C
NEW QUESTION # 60
Which one do you like?
What should a developer consider for an environment that has over 10,000 Case records?
- A. The transaction will succeed and changes will be committed.
- B. The try/catch block will handle any DML exceptions thrown.
- C. The try/catch block will handle exceptions thrown by governor limits.
- D. The transaction will fail due to exceeding the governor limit.
Answer: D
NEW QUESTION # 61
Universal Hiring uses Salesforce to capture job applications. A salesforce administrator created two custom objects; Job__c acting as the master object, Job_Application__c acting as the detail.
Within the Job__c object, a custom multi-select picklist, Preferred Locations__c, contains a list of approved states for the position. Each Job_Application__c record relates to a Contact within the system through a master-detail relationship.
Recruiters have requested the ability to view whether the Contact's Mailing State value matches a value selected on the Preferred_Locations_ c field, within the Job_Application__c record. Recruiters would like this value to be kept in sync if changes occur to the Contact's Mailing State.
What is the recommended tool a developer should use to meet the business requirement?
- A. Roll-up summary field
- B. Apex trigger
- C. Record-triggered flow
- D. Formula field
Answer: D
Explanation:
Scenario:
Objects Involved:
Job__c (Master)
Job_Application__c (Detail)
Contact (Related via Master-Detail relationship on Job_Application__c)
Fields:
Preferred_Locations__c (Multi-select picklist on Job__c)
MailingState (Field on Contact)
Requirement:
On Job_Application__c, display whether the Contact's MailingState matches any value in Preferred_Locations__c on the related Job__c.
Keep this value in sync if changes occur to the Contact's MailingState.
Solution:
Option C: Formula field
Correct Approach.
Create a Formula Field on Job_Application__c that compares the Contact's MailingState with the Job's Preferred_Locations__c.
Since Job_Application__c is a detail of Job__c and has a lookup to Contact, the formula can reference fields from both related objects.
Use the INCLUDES() function to check if the MailingState is among the selected values in Preferred_Locations__c.
Sample Formula:
INCLUDES(Job__r.Preferred_Locations__c, Contact__r.MailingState)
This formula returns a Boolean (TRUE or FALSE) indicating whether there's a match.
Benefits:
Real-Time Calculation: Updates automatically when either field changes.
No Code Required: Declarative solution using formula fields.
Maintenance: Easy to manage and update if needed.
Roll-up Summary Fields are used to perform calculations on detail records and summarize them on the master record.
Cannot be used to compare fields between unrelated objects or for the given comparison.
Option B: Record-triggered flow
Possible but Not Optimal.
A flow could be used to update a field based on changes.
However, it adds complexity and requires maintenance.
Flows consume resources and may have performance considerations.
Option D: Apex trigger
Possible but Overkill.
An Apex trigger can handle the requirement but introduces code maintenance.
Not necessary when a declarative solution exists.
Conclusion:
A Formula Field is the recommended tool to meet the business requirement.
It provides a simple, efficient, and maintainable solution that updates in real-time when data changes.
Reference:
Using Cross-Object Formulas
INCLUDES Function
Why Other Options are Not Suitable:
Option A: Roll-up summary field
Incorrect Use Case.
NEW QUESTION # 62
When a user edits the Postal Code on an Account, a custom Account text field named "Timezone" must be updated based on the values in a PoataliCodeToTimezcone o custom object.
Which two automation tools can be used to implement this feature?
Choose 2 answers
- A. Quick actions
- B. Fast Field Updates record-triggered flow
- C. Account trigger
- D. Approval process
Answer: B,C
Explanation:
To update the Timezone__c field on Account based on the Postal Code and values from PostalCodeToTimezone__c:
Option B: Account Trigger
An Apex trigger can query the PostalCodeToTimezone__c object and update the Timezone__c field when the Postal Code is changed.
A record-triggered flow that runs after the record is saved can perform a Get Records action to retrieve the matching PostalCodeToTimezone__c record and update the Timezone__c field.
Reference:
"Triggers enable you to perform custom actions before or after changes to Salesforce records."
- Apex Developer Guide: Triggers
Option D: Record-Triggered Flow (after-save)
"After-save flows can access other records and perform actions, such as create or update records."
- Salesforce Help: Record-Triggered Flows
Why Other Options Are Incorrect:
Option A: Quick Actions
Quick actions are initiated by the user and cannot automate field updates based on changes.
Option C: Approval Process
Approval processes are for record approval and are not suitable for automating field updates based on field changes.
NEW QUESTION # 63
Refer to the code snippet below:
When a Lightning web component is rendered, a list of apportunities that match certain criteria shopuld be retrievved from the database and displayed to the end user.
Choose 3 answer
- A. The method must be annotaled with true Invocablemethod annolation
- B. The method must be annotated with the AureEnabled annolation
- C. The method must specify the (continuation-true) attribute
- D. The method cannot mutate the result set retrieved from the database.
- E. The method must specify the (cacheable-trun) attribute
Answer: B,D,E
NEW QUESTION # 64
What is accurate statement about with sharing keyword? Choose 2 answers
- A. Both inner and outer classes can be declared as with sharing
- B. Inner classes inherit the sharing settings from the container class.
- C. Inner classes do not inherit the sharing settings from the container class
- D. Either inner or outer classes can be declared as with sharing, but not both
Answer: A,C
NEW QUESTION # 65
When an Account's custom picklist field called Customer Sentiment is changed to a value of "Confused", a new related Case should automatically be created.
Which two methods should a developer use to create this case? (Choose two.)
- A. Workflow Rule
- B. Custom Button
- C. Apex Trigger
- D. Process Builder
Answer: C,D
NEW QUESTION # 66
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Salesforce DEX-450 exam consists of 60 multiple-choice questions that are to be completed in 120 minutes. DEX-450 exam is administered online and can be taken from any location. The passing score for this certification exam is 68%. It is recommended that candidates have at least 3-6 months of experience in programmatic development and have completed the Salesforce Certified Platform Developer I certification before taking DEX-450 exam.
DEX-450 Dumps Updated Practice Test and 202 unique questions: https://www.topexamcollection.com/DEX-450-vce-collection.html
Latest Salesforce Developer DEX-450 Actual Free Exam Questions: https://drive.google.com/open?id=1OqWq3EUSf2vbP2zqU1br_-S0yEIVvh0z
