Salesforce DEX-450 Exam Questions and Answers PDF | SPOTO

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Question #1

Given the code below, what can be done so that recordcount can be accessed by a test class, but not by a non-test class? Public class mycontroller{ private integer recordcount; }

A. Add a seealldata annotation to the test class

B. Add the testvisible annotation to recordcount

C. Change recordcount from private to public

D. Add the testvisible annotation to the mycontroller class

View answer

Correct Answer: B

Question #2

What is a key difference between a Master-Detail Relationship and a Lookup Relationship?

A. A Master-Detail Relationship detail record inherits the sharing and security of its master record

B. When a record of a master object in a Lookup Relationship is deleted, the detail records are also deleted

C. A Lookup Relationship is a required field on an object

D. When a record of a master object in a Master-Detail Relationship is deleted, the detail records are kept and not deleted

View answer

Correct Answer: A

Question #3

A developer created a Visualforce page and custom controller to display the account type field as shown below. Custom controller code: Visualforce page snippet: what should the developer do to correct the problem?

A. Add a getter method for the attribute

B. Convert theAccount

C. Change theAccount attribute to public

D. Add with sharing to the custom controller

View answer

Correct Answer: A

Question #4

Given the following Anonymous block: 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 exceptions thrown by governor limits

C. The transaction will fail due to exceeding the governor limit

D. The try-catch block will handle any DML exceptions thrown,

View answer

Correct Answer: C

Question #5

What must the Controller for a Visulforce page utilized to override the standard Opportunity view button?

A. A constructor that initialized a private Opportunity variable

B. A callback constructor to reference the StandardController

C. The StandardSetController to support related lists for pagination

D. The Opportunity StandardController for pre-built functionality

View answer

Correct Answer: D

Question #6

Universal Containers wants to assess the advantages of declarative development versus programmatic customization for specific use cases in its Salesforce implementation.What are two characteristics of declarative development over programmatic customization?Choose 2 answers

A. Declarative development does not require Apex test classes

B. Declarative development has higher design limits and query limits,

C. Declarative development can be done using the Setup menu

D. Declarative code logic does not require maintenance or review

View answer

Correct Answer: AC

Question #7

Which tag should a developer include when styling from external CSS is required in a Visualforce page?

A. Apex : includeStyle

B. Apex : require

C. Apex : includeScript

D. Apex : stylesheet

View answer

Correct Answer: D

Question #8

An org has different Apex Classes that provide Account -related functionality.After a new validation rule is added to the object, many of the test methods fail.What can be done to resolve the failures and reduce the number of code changes needed for future validation rules?Choose 2 answers:

A. Create a method that creates valid Account records, and call this method from within test methods

B. Create a method that loads valid Account records from a Static Resource, and call this method within test methods

C. Create a method that performs a callout for a valid Account record, and call this method from within test methods

D. Create a method that queries for valid Account records, and call this method from within test methods

View answer

Correct Answer: AB

Question #9

What should a developer use to implement an automate approval process submission for case?

A. Process builder

B. An assignment rules

C. A workflow rules

D. Scheduled apex

View answer

Correct Answer: A

Question #10

A developer creates a batch Apex job to update a large number of records, and receives reports of the job timing out and not completing. What is the first step towards troubleshooting the issue?

A. Check the asynchronous job monitoring page to view the job status and logs

B. Check the debug logs for the batch job

C. Disable the batch job and recreate it with a smaller number of records

D. Decrease the batch size to reduce the load on the system

View answer

Correct Answer: A

Question #11

A developer needs to provide a way to mass edit,update, and delete records from a list view in which two ways can this be accomlpished? choose 2 answers

A. Download an unmanaged package from the appexchange that provides customizable mass edit, update and delete functionality

B. Configure the user interface and enable both inline editing enhanced lists

C. Download a managed package from the appexchange that provides customizable enhanced list views and buttons

D. Create a new visualforce page and apex controller for the list view that provides mass edit,update and delete functionality

View answer

Correct Answer: CD

Question #12

Which two operations can be performed using a formula field? Choose 2 answers

A. Displaying the last four digits of an encrypted Social Security number

B. Triggering a Process Builder

C. Displaying an Image based on the Opportunity Amount (Missed)

D. Calculating a score on a Lead based on the information from another field (Missed)

View answer

Correct Answer: CD

Question #13

A developer has to Identify a method in an Apex class that performs resource intensive actions in memory by iterating over the result set of a SOQL statement on the account. The method also performs a DML statement to save the changes to the database. Which two techniques should the developer implement as a best practice to esure transaction control and avoid exceeding governor limits? Choose 2 answers

A. Use the Database

B. Use the System

C. Use the @ReadOnly annotation to bypass the number of rows returned by a SOQL

D. Use Partial DML statements to ensure only valid data is committed

View answer

Correct Answer: AB

Question #14

A developer creates a method in an Apex class and needs to ensure that errors are handled properly. What would the developer use? (There are three correct answers.)

A. ApexPages

B. A custom exception

D. Database

E. A try/catch construct

View answer

Correct Answer: BCE

Question #15

Refer to the following Apex code: Integer x=0; do x=1; x++; } while (x< 1); System.debug (x); What is the value of x when it is written to the debug log?

A. 0

B. 1

C. 2correct

D. 3

View answer

Correct Answer: C

Question #16

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?

A. Update a property on the parent

B. Fire a notification

C. Create a custom event,correct

D. Call a method in the Apex controller

View answer

Correct Answer: C

Question #17

A developer created a visualforce page using a custom controller that calls an apex helper class. A method in the helper class hits a governor limit. what is the result of the transaction?

A. The helper class creates a savepoint and continues

B. All changes in the transaction are rolled back

C. All changes made by the custom controller are saved

D. The custom controller calls the helper class method ag

View answer

Correct Answer: C

Question #18

A visualforce interface is created for Case Management that includes both standard and custom functionality defined in an Apex class called myControllerExtension. The visualforce page should include whichattribute(s) to correctly implement controller functionality?

A. StandardController = "case" and extensions =" myControllerExtension"

B. Extensions=" myControllerExtension"

C. Controller=" myControllerExtension"

D. Controller = "case" and extensions =" myControllerExtension"

View answer

Correct Answer: A

Question #19

On a Visualforce page with a custom controller, how should a developer retrieve a record by using an ID that is passed on the URL?

A. Use the constructor method for the controller

B. Use the $Action

C. Create a new PageReference object with the Id

D. Use the tag in the Visualforce page

View answer

Correct Answer: A

Question #20

A developer has the following code:try {List nameList;Account a;String s = a.Name;nameList.add(s);} catch (ListException le ) {System.debug(' List Exception ');} catch (NullPointerException npe) {System.debug(' NullPointer Exception ');} catch (Exception e) {System.debug(' Generic Exception ');}What message will be logged?

A. List Exception

B. NullPointer Exception

C. Generic Exception

D. No message is logged

View answer

Correct Answer: B

Question #21

An apex trigger fails because it exceeds governor limits. Which two techniques should a developer use to resolve the problem? Choose 2 answers

A. Use the database class to handle DML operations

B. Use maps to reference related records

C. Use SOQL aggregate queries to retrieve child records

D. Use lists for all DML operations

View answer

Correct Answer: BD

Question #22

Universal Container(UC) wants to lower its shipping cost while making the shipping process more efficient. The Distribution Officer advises UC to implement global addresses to allow multiple Accounts to share a default pickup address. The Developer is tasked to create the supporting object and relationship for this business requirement and uses the Setup Menu to create a custom object called "Global Address". Which field should the developer ad to create the most efficient model that supports the business n

A. Add a Master-Detail field on the Account object to the Global Address object

B. Add a Master-Detail field on the Global Address object to the Account object

C. Add a Lookup field on the Account object to the Global Address object

D. Add a Lookup field on the Global Address object to the Account object

View answer

Correct Answer: C

Question #23

A team of developers is working on a source-driven project that allows them to work independently, with many different org configurations. Which type of Salesforce orgs should they use for their development?

A. Developer sandboxes

B. Scratch orgs

C. Full Copy sandboxes

D. Developer orgs

View answer

Correct Answer: B

Question #24

A developer has the following trigger that fires after insert and creates a child Case whenever a new Case is created. ListchildCases = new List();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. Multiple child cases are created for each parent case in Trigger

B. Child case is created for each parent case in Trigger

C. The trigger enters an infinite loop and eventually fails

D. The trigger fails if the Subject field on the parent is blank

View answer

Correct Answer: B

Question #25

A developer created an Apex trigger using the Developer Console and now wants to debug codeHow can the developer accomplish this in the Developer Console?

A. Select the Override Log Triggers checkbox for the trigger

B. Add the user name in the Log Inspector

C. Open the Progress tab in the Developer Console

D. Open the logs tab in the Developer Console

View answer

Correct Answer: D

Question #26

A developer must provide a custom user interface when users edit a Contact. Users must be able to use the interface in Salesforce Classic and Lightning Experience. What should the developer do to provide the custom user interface?

A. Override the Contact's Edit button with a Lightning page Salesforce Classic and a Visualforce page in Lightning Experience

B. Override the Contact's Edit button with a Visualforce page in Salesforce Classic and a Lightning page in Lightning experience

C. Override the Contact's Edit button with a Visualforce page in Salesforce Classic and a Lightning component in Lightning Experience

D. Override the Contact's Edit button with a Lightning component in Salesforce Classic and a Lightning component in Lightning experience

View answer

Correct Answer: C

Question #27

The Sales Management team hires a new intern. The intern is not allowed to view Opportunities, but needs to see the Most Recent Closed Date of all child Opportunities when viewing an Account record. What would a developer do to meet this requirement?

A. Create a trigger on the Account object that queries the Close Date of the most recent Opportunities

B. Create a Workflow rule on the Opportunity object that updates a field on the parent Account

C. Create a formula field on the Account object that performs a MAX on the Opportunity Close Date field

D. Create a roll-up summary field on the Account object that performs a MAX on the Opportunity Close Date field

View answer

Correct Answer: D

Question #28

A developer needs to create a baseline set of data (Accounts, Contacts, Products, Assets) for an entire suite of tests allowing them to test independent requirements for various types of Salesforce Cases. Which approach can efficiently generate the required data for each unit test?

A. Use @TestSetup with a void method

B. Create test data before Test

C. Add @TsTest (seeAllData=true) at the start of the unit test class

D. Create a mock using the Stub AP

View answer

Correct Answer: A

Question #29

Which feature should a developer use to update an inventory count on related Product records when the status of an Order is modified to indicate it is fulfilled?

A. Process Builder process

B. Lightning component

C. Visualforce page

D. Workflow rule

View answer

Correct Answer: A

Question #30

A developer must create a CreditcardPayment class that provides an implementation of an existing Payment class. Public virtual class Payment { public virtual void makePayment(Decimal amount) { / *implementation*/ } }Which is the correct implementation?

A. Public class CreditcardPayment extends Payment { public override void makePayment(Decimal amount) { /*implementation*/ } }

B. Public class CreditCardPayment implements Payment { public virtual void makePayment(Decimal amount) { /*implementation*/ } }

C. Public class CreditCardPayment extends Payment { public virtual void makePayment(Decimal amount) { /*implementation*/ } }

D. Public class CreditCardPayment implements Payment { public override void makePayment(Decimal amount) { /*Implementation*/ } }

View answer

Correct Answer: A

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