DEX-450試験無料問題集（202題）「Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience 認定」

出題：1

The following Apex method is part of the ContactService class that is called from a trigger:

How should the developer modify the code to ensure best practices are met?
A)

C)

D)

A. Option D

B. Option C

C. Option A

D. Option B

正解：C 解答を投票する

出題：2

Which Apex class contains methods to return the amount of resources that have been used for a particular governor, such as the number of DML statements?

A. OrgLimits

B. Exception

C. Messaging

D. Limits

正解：D 解答を投票する

出題：3

A developer creates a custom exception as shown below:
public class ParityException extends Exception { }
What are two ways the developer can fire the exception in Apex?

A. new ParityException('parity does not match');

B. throw new parityException ('parity does not match');

C. new ParityException ();

D. throw new ParityException ();

正解：B,D 解答を投票する

出題：4

Universal Containers implemented a private sharing model for the Account object. A custom Account search tool was developed with Apex to help sales representatives find accounts that match multiple criteria they specify. Since its release, users of the tool report they can see Accounts they do not own.
What should the developer use to enforce sharing permissions for the currently logged in user while using the custom search tool?

A. Use the with sharing keyword on the class declaration.

B. Use the schema describe calls to determine if the logged-in user has access to the Account object.

C. Use the userInfo Apex class to filter all SOQL queries to returned records owned by the logged-in user.

D. Use the without sharing keyword on the class declaration.

正解：A 解答を投票する

出題：5

A developer creates a new Apex trigger with a helper class, and writes a test class that only exercises 95% coverage of the new Apex helper class.
Change Set deployment to production fails with the test coverage warning:
"Test coverage of selected Apex Trigger is 0%, at least 1% test coverage is required." What should the developer do to successfully deploy the new Apex trigger and helper class?

A. Increase the test class coverage on the helper class.

B. Run the tests using the Run All Tests' method.

C. Remove the failing test methods from the test class

D. Create a test class and methods to cover the Apex trigger.

正解：D 解答を投票する

出題：6

Universal Containers recently transitioned from Classic to Lightning Experience.
One of its business processes requires certain values from the Opportunity object to be sent via an HTTP REST callout to its external order management system when the user presses a custom button on the Opportunity detail page. Example values are as follows:
* Name
*Amount
* Account
Which two methods should the developer implement to fulfill the business requirement?
Choose 2 answers

A. Create an after update trigger on the Opportunity object that calls a helper method using @future (Callout=true) to perform the HTTP REST callout.

B. Create a Remote Action on the Opportunity object that executes an Apex immediate action to perform the HTTP REST callout whenever the Opportunity is updated.

C. Create a Lightning component quick action that performs the HTTP REST callout, and use a Lightning Action to expose the component on the Opportunity detail page.

D. Create a custom Visualforce quick action that performs the HTTP REST callout, and use a Visualforce quick action to expose the component on the Opportunity detail page.

正解：C,D 解答を投票する

出題：7

A developer is alerted to an issue with a custom Apex trigger that is causing records to be duplicated.
What is the most appropriate debugging approach to troubleshoot the issue?

A. Disable the trigger in production and test to see if the issue still occurs.

B. Use the Apex Interactive Debugger to step through the code and identify the issue.

C. Review the Historical Event logs to identify the source of the issue.

D. Add system.debug statements to the code to track the execution flow and identify the issue.

正解：D 解答を投票する

出題：8

A business has a proprietary Order Management System (OMS) that creates orders from its 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.
The business notices that each update from the OMS creates a new order record in Salesforce.
Which two actions should prevent the duplicate order records from being created in Salesforce?
Choose 2 answers

A. O Write a trigger on the Order object to delete the duplicates.

B. O Use the email on the contact record as an external ID.

C. Use the order number from the OMS as an external ID.

D. Ensure that the order number in the OMS is unique.

正解：C,D 解答を投票する

出題：9

Which two are phases in the Aura application event propagation framework?
Choose 2 answers

A. Control

B. Buddle

C. Emit

D. default

正解：B,D 解答を投票する

出題：10

How many Accounts will be inserted by the following block of code?

A. 150

B. 100

C. 0

D. 500

正解：A 解答を投票する

出題：11

Which statement generates a list of Leads and Contacts that have a field with the phrase 'ACME'?

A.

B.

C.

D.

正解：B 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：12

The values 'High', 'Medium', and 'Low' are identified as common values for multiple picklists across different objects.
What is an approach a developer can take to streamline maintenance of the picklists and their values, while also restricting the values to the ones mentioned above?

A. Create the Picklist on each object and add a validation rule to ensure data integrity.

B. Create the Picklist on each object as a required field and select "Display values alphabetically, not in the order entered".

C. Create the Picklist on each object and use a Global Picklist Value Set containing the values.

D. Create the Picklist on each object and select "Restrict picklist to the values defined in the value set".

正解：C 解答を投票する

出題：13

When the code executes, a DML exception is thrown.
How should a developer modify the code to ensure exceptions are handled gracefully?

A. Remove null items from the list of Accounts.

B. Implement the upset DML statement.

C. Implement a try/catch block for the DML.

D. Implement Change Data Capture.

正解：C 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：14

A Developer Edition org has five existing accounts. A developer wants to add 10 more accounts for testing purposes.
The following code is executed in the Developer Console using the Execute Anonymous window:

How many total accounts will be in the org after this code is executed?

A. 6

B. 5

C. 15

D. 10

正解：D 解答を投票する

DEX-450試験無料問題集「Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience 認定」