DEX-450 Practice Exam Tests Latest Updated on Nov-2021
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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 Orgâs Data
Write a basic query using Salesforceâs 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 Apexâs 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
How to book the Salesforce DEX-450 Exam
There are the following steps for registering the Salesforce DEX-450 exam:
Step 1: Visit Salesforce Exam Registration Step 2: Signup/Login to Salesforce account Step 4: Select Date, time and confirm with the payment method
NEW QUESTION 133
Which two statements are acceptable for a developer to use inside procedural loops?
- A. Contact con = new Contact();
- B. ContactList.remove(i);
- C. Delete contactList;
- D. Account a = [SELECT id, Name FROM account WHERE id = : con.AccountId LIMIT 1];
Answer: A,B
NEW QUESTION 134
A company that uses a Custom object to track candidates would like to send candidate information automatically to a third -party human resource system when a candidate is hired. What can a developer do to accomplish this task?
- A. Create a Process Builder with an outbound message action.
- B. Create an escalation rule to the hiring manager.
- C. Create a workflow rule with an outbound message action.
- D. Create an auto response rule to the candidate.
Answer: C
NEW QUESTION 135
A developer created a Visualforce page and a custom controller with methods to handle different buttons and events that can occur on the page.
What should the developer do to deploy to production?
- A. Create a test page that provides coverage of the custom controller.
- B. Create a test page that provides coverage of the Visualforce page.
- C. Create a test class that provides coverage of the custom controller.
- D. Create a test class that provides coverage of the Visualforce page.
Answer: C
NEW QUESTION 136
Given the code block: Integer x; For(x=0;x<10; x+=2) { If(x==8) break; If(x==10) break; } System.debug(x); Which value will the system debug statement display?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION 137
A developer is notified that a text field is being automatically populated with invalid values.however, this should be prevented by a custom validation rule that is in placewhat could be causing this?
- A. The user belongs to a permission set that suppresses the validation rule
- B. The field is being populated by a before trigger
- C. The field is being populated by a workflow field update
- D. A DML exception is occuring during the save order of execution
Answer: C
NEW QUESTION 138
A developer needs to create an audit trail for records that are sent to the recycle bin. Which type of trigger is most appropriate to create?
- A. After undelete
- B. Before delete
- C. After delete
- D. Before undelete
Answer: A
NEW QUESTION 139
Which data type or collection of data types can SOQL statements populate or evaluate to? (Choose 3)
- A. A list of sObjects
- B. A Boolean
- C. A single sObject
- D. A string
- E. An integer
Answer: A,C,E
NEW QUESTION 140
A developer needs to confirm that a Contact trigger works correctly without changing the organization's dat a. what should the developer do to test the Contact trigger?
- A. Use the New button on the Salesforce Contacts Tab to create a new Contact record.
- B. Use the Open execute Anonymous feature on the Developer Console to run an 'insert Contact' DML statement
- C. Use the Test menu on the Developer Console to run all test classes for the Contact trigger
- D. Use Deploy from the VSCode IDE to display an 'insert Contact' Apex class.
Answer: C
NEW QUESTION 141
Which action can a developer take to reduce the execution time of the following code? List<account> allaccounts = [select id from account]; list<account> allcontacts = [select id, accountid from contact]; for (account a :allaccounts){ for (contact c:allcontacts){ if(c.accountid = a.id){ //do work } } }
- A. Use a map <id,contact> for allaccounts
- B. Create an apex helper class for the SOQL
- C. Put the account loop inside the contact loop
- D. Add a group by clause to the contact SOQL
Answer: A
NEW QUESTION 142
Which one do you like?
What should a developer consider for an environment that has over 10,000 Case records?
- A. The try/catch block will handle exceptions thrown by governor limits.
- B. The transaction will fail due to exceeding the governor limit.
- C. The try/catch block will handle any DML exceptions thrown.
- D. The transaction will succeed and changes will be committed.
Answer: B
NEW QUESTION 143
A Next Best Action strategy uses an Enhance Element that invokes an Apex method to determine a discount level for a Contact, based on a number of factors. What is the correct definition of the Apex method?
- A. @InvocableMethod
global List<List<Recommendation>> getlevel(List<COntactWrapper> input)
{ /*implementation */ } - B. @InvocableMethod
global static ListRecommendation getLevel(List<Contactwrapper> input)
{ /*implementation*/ } - C. @InvocableMethod
global Recommendation getlevel(ContactWrapper input)
{ /*implementation */ } - D. @InvocableMethod
global static List<List<Recommendation>> getLevel (List<ContactWrapper> input)
{ /*implementation */ }
Answer: D
NEW QUESTION 144
The sales team at universal container would like to see a visual indicator appear on both account and opportunity page layout to alert salespeople when an account is late making payments or has entered the collections process. What can a developer implement to achieve this requirement without having to write custom code?
- A. Workflow rule
- B. Quick action
- C. Formula field
- D. Roll-up summary field
Answer: C
NEW QUESTION 145
What is considered the primary purpose for creating Apex tests?
- A. To guarantee at least 50% of code is covered by unit tests before it is deployed
- B. To ensure every use case of the application is covered by a test
- C. To confirm every trigger in executed at least once
- D. To confirm all classes and triggers compile successfully
Answer: B
NEW QUESTION 146
Account acct = {SELECT Id from Account limit 1}; Given the code above, how can a developer get the type of object from acct?
- A. Call "acct.getsObjectType()"
- B. Call "acct.SobjectType"
- C. Call "Account.getSobjectType()"
- D. Call "Account.SobjectType"
Answer: A
NEW QUESTION 147
A developer encounters APEX heap limit errors in a trigger.
Which two methods should the developer use to avoid this error? (Choose two.)
- A. Remove or set collections to null after use.
- B. Query and store fields from the related object in a collection when updating related objects.
- C. Use the transient keyword when declaring variables.
- D. Use SOQL for loops instead of assigning large queries results to a single collection and looping through the collection.
Answer: C,D
NEW QUESTION 148
A company would like to send an offer letter to a candidate, have the candidate sign it electronically, and then send the letter back.What can a developer do to accomplish this?
- A. Create a visual workflow that will capture the candidate's signature electronically
- B. Create an assignment rule that will assign the offer letter to the candidate
- C. Install a managed package that will allow the candidate to sign documents electronically
- D. Develop a Process Builder that will send the offer letter and allow the candidate to sign it electronically.
Answer: C
NEW QUESTION 149
What is the result when a Visualforce page calls an Apex controller, which calls another Apex class, which then results in hitting a governor limit?
- A. All changes before a savepoint are saved.
- B. Any changes up to the error are rolled back.
- C. Any changes up to the error are saved.
- D. All changes are saved in the first Apex class.
Answer: B
NEW QUESTION 150
Which statement about the Lookup Relationship between a Custom Object and a Standard Object is correct?
- A. The Custom Object will be deleted when the referenced Standard Object is deleted.
- B. The Lookup Relationship cannot be marked as required on the page layout for the Custom Object.
- C. The Lookup Relationship on the Custom Object can prevent the deletion of the Standard Object.
- D. The Custom Object inherits security from the referenced Standard Objects
Answer: A
NEW QUESTION 151
What is a capability of the Force.com IDE? Choose 2 answers
- A. Run Apex tests.
- B. Edit metadata components.
- C. Download debug logs.
- D. Roll back deployments.
Answer: A,B
NEW QUESTION 152
Which statement would a developer use when creating test data for products and pricebooks?
- A. List objList = Test.loadData(Account.sObjectType, 'myResource');
- B. Id pricebookId = Test.getStandardPricebookId();
- C. Pricebook pb = new Pricebook();
- D. IsTest(SeeAllData = false);
Answer: B
NEW QUESTION 153
A developer has the following trigger that fires after insert and creates a child Case whenever a new Case is created. List<Case> childCases = new List<Case>();for (Case parent : Trigger.new){Case child = new Case (ParentId = parent.Id, Subject = parent.Subject);childCases.add(child);}insert childCases; What happens after the code block executes?
- A. The trigger enters an infinite loop and eventually fails.
- B. Multiple child cases are created for each parent case in Trigger.new.
- C. The trigger fails if the Subject field on the parent is blank.
- D. Child case is created for each parent case in Trigger.new.
Answer: D
NEW QUESTION 154
For which example task should a developer use a trigger rather than a workflow rule?
- A. To notify an external system that a record has been modified.
- B. To send an email to hiring manager when a candidate accepts a job offer.
- C. To set the primary Contact on an Account record when it is saved
- D. To set the Name field of an expense report record to Expense and the Date when it is saved.
Answer: C
NEW QUESTION 155
How should a custom user interface be provided when a user edits an Account in Lightning Experience?
- A. Override the Account's Edit button with Lightning page.
- B. Override the Account's Edit button with Lightning component.
- C. Override the Account's Edit button with Lightning Flow
- D. Override the Account's Edit button with Lightning Action
Answer: B
NEW QUESTION 156
Developer needs to automatically populate the Reports To field in a Contact record based on the values of the related Account and Department fields in the Contact record. Which type of trigger would the developer create? Choose 2 answers
- A. Before insert
- B. Before update
- C. After insert
- D. After update
Answer: A,B
NEW QUESTION 157
What should be used to create scratch orgs?
- A. Workbench
- B. Salesforce CLI
- C. Sandbox refresh
- D. Developer Console
Answer: B
NEW QUESTION 158
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