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Who should take the Salesforce DEX-450 Exam

This course is designed for programme developers starting on the Salesforce platform who require programming customizations on Apex and Visualforce business logic as well as on user interface layers. There are no prerequisites for Salesforce DEX-450 Exam.

  • Programmatic developers.

Salesforce DEX-450 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Referencing Custom Controllers and Controller Extensions
  • Use the sObject data type, the primitive data types, and basic control statements in Apex
Topic 2
  • Process the result of a query in Apex
  • Understanding Record Types
  • Use trigger context variables
Topic 3
  • Describe how triggers fit into and can be impacted by the Order of Execution
  • Building a Data Model on the Salesforce Platform
Topic 4
  • Describe the memory lifecycle for static attributes
  • Use Platform Events for Immediate Error Logging
Topic 5
  • Write tests for action methods, getters, setters, and properties
  • List the differences between the ways you can invoke DML operations
Topic 6
  • Describe strategies for Testing Visualforce controllers
  • Use SOQL to Query Parent-Child Relationships
Topic 7
  • Describe common limit issues and security concerns
  • Launch a Visualforce page using a custom button
Topic 8
  • Describe the syntax of a trigger definition
  • Display data from a record in a Visualforce page
Topic 9
  • Write a query that traverses a child-to-parent and parent-to-child relationship
  • Creating Roll-Up Summary Fields


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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 platformCreate a custom objectCreate custom fieldsCreate relationship fields

2. Work Effectively with Custom Objects and Fields

Create formula fieldsCreate roll-up summary fieldsDescribe 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 ApexExecute simple ApexUse 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, SOQLProcess the result of a query in ApexCreate a query dynamically at run-time Use SOQL to Query - Parent-Child RelationshipsDescribe a relationship queryWrite a query that traverses a child-to-parent relationshipWrite a query that traverses a parent-to-child relationship

5. DML Essentials

List the differences between the ways you can invoke DML operationsWrite Apex to invoke DML operations and handle DML errors

6. Trigger Essentials

Describe what a trigger is used forDescribe the syntax of a trigger definitionUse trigger context variables

7. Apex Class Essentials

Describe how Apex classes are usedDefine an Apex classDetermine what data an Apex class can access

8. The Save Order of Execution and Apex Transactions

Describe key points in the Order of ExecutionDescribe how triggers fit into and can be impacted by the Order of ExecutionDescribe the lifecycle of an Apex TransactionDescribe the memory lifecycle for static variables

9. Testing Essentials

Describe Apex's testing frameworkCreate test dataWrite and run an Apex test

10. Testing Strategies

Describe practices for writing code that is easy to maintain and extendWrite triggers and classes that assume batches of data as inputWrite code that works efficiently with the database, both in querying and using DML

11. Strategies for Designing Efficient Apex Solutions

Determine your code coverage percentagesCreate 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 limitationsDescribe ways in which you can use declarative functionality to improve your programmatic solutions

13. Creating Visualforce Pages

Create a Visualforce pageReference a standard controllerLaunch a Visualforce page using a custom buttonDisplay data from a record in a Visualforce page

14. Exploring the View and Controller Layers of Visualforce

Create a Visualforce pageDisplay related dataInvoke standard controller actions

15. Working with Custom Controllers and Controller Extensions

Create controller extensionsCreate a custom controllerWork with propertiesUse PageReferencesInvoke custom methods in Visualforce pages14.Working with List Controllers and SOSL Queries

Use a standard list controller in a Visualforce pageCreate a SOSL queryCreate a custom list controller

16. Visualforce Development Considerations

Determine whether a declarative solution exists for your requirementsDescribe common governor limit issues and security concernsDescribe Visualforce strategies Testing Visualforce ControllersDescribe how a Visualforce controller interacts with the viewWrite tests for controller constructorsWrite tests for action methods, getters, setters, and properties

Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Sample Questions (Q35-Q40):

NEW QUESTION # 35

A developer considers the following snippet of code:



Based on this code, what is the value of x?

  • A. 0
  • B. 1
  • C. 2
  • D. 3

Answer: D



NEW QUESTION # 36

A developer needs to join data received from an integration with an external system with parent records in Salesforce. The data set does not contain the Salesforce IDs of the parent records, but it does have a foreign key attribute that can be used to identify the parent.

Which action will allow the developer to relate records in the data model without knowing the Salesforce ID?

  • A. Create a custom field on the child object of type External Relationship.
  • B. Create a custom field on the child object of type Foreign Key.
  • C. Create and populate a custom field on the parent object marked as Unique.
  • D. Create and populate a custom field on the parent object marked as an External ID.

Answer: B



NEW QUESTION # 37

What is an accurate constructor for a custom controller named "MyController"?

  • A. public MyController (sObject obj) { account = (Account) obj; }
  • B. public MyController (ApexPages.StandardController stdController) { account = (Account) stdController.getRecord(); }
  • C. public MyController (List objects) { accounts = (List ) objects; }
  • D. public MyController () { account = new Account () ; }

Answer: D



NEW QUESTION # 38

What is a benefit of developing applications in a multi-tenant environment?

  • A. Default out-of-the-box configuration
  • B. Unlimited processing power and memory
  • C. Access to predefined computing resources
  • D. Enforced best practices for development

Answer: A



NEW QUESTION # 39

A developer is creating a Visualforce page that allows users to create multiple Opportunities. The developer is asked to verify the current user's default Opportunity record type, and set certain default values based on the record type before inserting the record. How can the developer find the current user's default record type?

  • A. Create the opportunity and check the opportunity.recordType before inserting, which will have the record ID of the current user's default record type
  • B. Use Opportunity.SObjectType.getDescribe().getRecordTypeInfos() to get a list of record types, and iterate trought them until isdefaultRecordTypeMapping() is true.
  • C. Query the Profile where the ID equals userInfo.getProfileID() and then use the profile.Opportunity.getDefaultRecordType() method.
  • D. Use the Schema.userInfo.Opportunity.getDefaultRecordType() method.

Answer: B



NEW QUESTION # 40

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