Salesforce Plat-Dev-301 Deluxe Study Guide with Online Test Engine
Plat-Dev-301 dumps review - Professional Quiz Study Materials
NEW QUESTION # 67
A developer created a Lightning web component mat allows users to Input a text value that is used to search for Accounts by calling an Apex method. The Apex method returns a list of account to apply and is called imperatively from a JavaScript event handler.
Which two changes should the developer make so the Apex method functions correctly. Choose 2 answers
- A. Add @AuraEnabled to line 01.
- B. Add @AuraEnabled to lines 11 and 12.
- C. Add @AuraEnabled to line 03.
- D. Add @AuraEnabled to line 09.
Answer: B,C
NEW QUESTION # 68
Which statement is true regarding savepoints?
- A. Reference to savepoints can cross trigger invocations.
- B. You can roll back to any savepoint variable created in any order.
- C. Savepoints are not limited by DML statement governor limits.
- D. Static variables are not reverted during a rollback.
Answer: D
Explanation:
When rolling back to a savepoint, any DML operations that occurred after that savepoint are undone, but static variables are not reverted. Therefore, when a rollback occurs, the state of all static variables at the time of the rollback remains the same as it was just before the rollback.
NEW QUESTION # 69
What is the best practice to initialize a Vizualforce page in a test class?
- A. Use Test. setCurrentPage MyTestPags;
- B. Use Test. currantPage .getParamatars put (MyTaestPaga) ;
- C. Use controller. currentPage. setPage (MyTastfage) ;
- D. Use Test. setCurrentPage (Page. MyTeatPage);
Answer: D
Explanation:
Test.setCurrentPage(Page.MyTestPage) is used to set the context to a Visualforce page in tests, allowing you to simulate a page request in a test method.
NEW QUESTION # 70
Universal Containers decided to use Salesforce to manage a new hire interview process. A custom object called Candidate was created with organization-wide defaults set to Private. A lookup on the Candidate object sets an employee as an Interviewer.
What should be used to automatically give Read access to the record when the lookup field is set to the Interviewer user?
- A. The record cannot he shared with the current setup.
- B. The record can be shared using a sharing rule.
- C. The record can be shared using an Apex class.
- D. The record can be shared using a permission set.
Answer: B
Explanation:
A sharing rule can be used to automatically give Read access to a user specified in a lookup field. Sharing rules are declarative and can be based on criteria such as the value of a lookup field. This can be done without writing code and is maintainable through the Salesforce UI.
NEW QUESTION # 71
An Apex trigger and Apex class increment a counter, Edit __C, any time the Case is changed.
A)
B)
C)
D)
- A. Option B
- B. Option D
- C. Option C
- D. Option A
Answer: C
NEW QUESTION # 72
A developer is asked to look into an issue where a scheduled Apex is running into DML limits. Upon investigation, the developer finds that the number of records processed by the scheduled Apex has recently increased to more than 10,000.
What should the developer do to eliminate the limit exception error?
- A. Implement the Batchable interface.
- B. Use the @future annotation.
- C. Implement the Qususabls interface.
- D. Use platform events.
Answer: A
Explanation:
When scheduled Apex runs into DML limits due to a high number of records, implementing the Batchable interface is recommended. This allows the job to be broken down into smaller batches that are processed separately, thus avoiding hitting governor limits. Reference:
Using Batch Apex
NEW QUESTION # 73
A developer sees test failures in the sandbox but not in production. No code or metadata changes have been actively made to either environment since the sandbox was created.
Which consideration should be checked to resolve the issue?
- A. Ensure that Disable Parallel Apex Testing Is unchecked.
- B. Ensure the sandbox Is on the same release as production.
- C. Ensure the Apex classes are on the same API version.
- D. Ensure test classes are using SeeAllData = true.
Answer: B
Explanation:
If test failures are occurring in a sandbox but not in production and there have been no active code or metadata changes, it could be due to differences in the Salesforce release versions between the two environments. Sandboxes can be on preview instances which get upgraded to new releases before production instances. This can lead to differences in behavior and could affect test executions. Ensuring that both the sandbox and production are on the same release can resolve such issues. API version differences and parallel testing settings typically do not cause discrepancies if the code hasn't changed, and while using SeeAllData=true is generally not recommended due to its dependence on the organization's data, it's unlikely to be the cause if the issue is related to the environment rather than the data.
Sandbox Preview Instructions
Understand the Salesforce Release Process
NEW QUESTION # 74
A developer needs to send Account records to an external system for backup purposes. The process must take a snapshot of Accounts as they are saved and then make a callout to a RESTful web service. The web service can only receive, at most, one record per call.
What should a developer do to implement these requirements?
- A. Expose an Apex class as e web service.
- B. Implement the Queveable interface.
- C. Create a future method.
- D. Implement platform events.
Answer: A
NEW QUESTION # 75
A developer is responsible for formulating the deployment process for a Salesforce project. The project follows a source-driven development approach, and the developer wants to ensure efficient deployment and version control of the metadata changes.
Which tool or mechanism should be utilized for managing the source-driven deployment process?
- A. Force.com IDE
- B. Change Sets
- C. Metadata API
- D. Salesforce CLI with Salesforce DX
Answer: D
Explanation:
Salesforce CLI with Salesforce DX is the best tool for managing a source-driven deployment process. It facilitates version control, scriptable deployment, and rollback, and is optimized for collaboration and continuous integration.
NEW QUESTION # 76
A developer notices the execution of all the test methods in a class takes a long time to run, due to the initial setup of all the test data that is needed to perform the tests. What should the developer do to speed up test execution?
- A. Ensure proper usage of test data factory in all test methods.
- B. Reduce the amount of test methods in the class.
- C. Define a method that creates test data and annotate with @createData.
- D. Define a method that creates test data and annotate with @testSetup.
Answer: D
Explanation:
Using the @testSetup annotation to define a method that creates test data before the tests run can significantly speed up test execution by reducing the setup time for each test method in the class. This method runs once before any test method in the class and can be used by all test methods.
NEW QUESTION # 77
A developer has a requirement to query three fields (Id, Name, Type) from an Account; and first and last names for all Contacts associated with the Account.
Which option is the preferred, optimized method to achieve this for the Account named 'Ozone Electronics'?
A)
B)
C)
D)
- A. Option B
- B. Option D
- C. Option C
- D. Option A
Answer: C
NEW QUESTION # 78
A developer created the following test method:
The developer org has five accounts where the name starts with "Test". The developer executes this test in the Developer Console. After the test code runs, which statement is true?
- A. The test will fail.
- B. There will be no accounts where the name starts with "Test".
- C. There will be five accounts where the name starts with "Test".
- D. There will be six accounts where the name starts with "Test".
Answer: A
Explanation:
Since the SeeAllData=true annotation is used, the test class does not have its own test data and is relying on the data in the org. The org already has accounts with the name starting with "Test", so the assertion that no accounts should exist after the deletion will fail because the test method only deletes the account that was created within its scope.
Apex Developer Guide
NEW QUESTION # 79
A developer is working on an integration between Salestorce and an external system. The integration requires sending a large amount of data to the external systern, which can cause long response times and timeouts.
To optimize the performance and avoid timeouts, which technique should be used?
- A. Increase the timeout limit in the callout options,
- B. Use the @future annotation to make the callout asynchronous.
- C. Implement an asynchronous callout using the Continuation class,
- D. Use a chained batch Apex to split the data into smaller batches.
Answer: C
Explanation:
Implementing an asynchronous callout using the Continuation class is the optimal solution to handle long response times and avoid timeouts in Salesforce. It allows the Apex code to make a long-running request to an external service and free up the thread to serve other requests.
NEW QUESTION # 80
A developer is tasked with ensuring that email addresses entered into the system for Contacts and for a custom object called survey Response c do not belong to a list of blocked domains.
The list of blocked domains is stored in a custom object for ease of maintenance by users. The survey Response c object is populated via a custom Visualforce page.
What is the optimal way to implement this?
- A. Implement the logic in validation rules on the Contact and the Burvey Response_c Objects.
- B. Implement the logic in a helper class that is called by an Apex trigger on Contact and from the custom Visualforce page controller.
- C. Implement the logic in the custom Visualforce page controller and call "that method from an Apex trigger on Contact.
- D. Implement the logic in an Apex trigger on Contact and also implement the logic within the custom Visualforce page controller.
Answer: B
Explanation:
The optimal way to enforce the exclusion of blocked domains for email addresses entered into Contacts and a custom object is to use a helper class. The class can be called by an Apex trigger on the Contact object and from the controller of the custom Visualforce page used for the Survey Response. This centralizes the logic for maintainability and reusability.
NEW QUESTION # 81
A company has an Apex process that makes multiple extensive database operations and web service callouts. The database processes and web services can take a long time to run and must be run sequentially.
How should the developer write this Apex code without running into governor limits and system limitations?
- A. Use multiple 3zutuze methods for each process and callout.
- B. Use Limits class to stop entire process once governor limits are reached.
- C. Use Queueable Apex to chain the jobs to run sequentially.
- D. Use Apex Scheduler to schedule each process.
Answer: C
Explanation:
Queueable Apex is suitable for complex processes that require chaining jobs to run sequentially. It can handle long-running processes without hitting governor limits, as each chained job runs in a new transaction with its own set of governor limits.
NEW QUESTION # 82
What is the optimal way to fix this?
A)
B)
C)
D)
- A. Option B
- B. Option D
- C. Option C
- D. Option A
Answer: C
Explanation:
Test.startTest() and Test.stopTest() should wrap the method call for resource allocation. Test.setMock() sets a mock callout for the test to handle callouts.
NEW QUESTION # 83
Which three approaches should a developer implement to obtain the best performance for data retrieval when building a Lightning web component? Choose 3 answers
- A. Use {Cacheable=true} whenever possible
- B. Use layoutTypes: 9'Full') to display a set of fields.
- C. Use the Lightning Data Service.
- D. Use lazy load for occasionally accessed data.
- E. Use getRecordUi to obtain metadata.
Answer: A,C,D
Explanation:
Lazy loading improves performance by loading data only when needed.
Lightning Data Service (LDS) handles data operations and caching efficiently.
Using {Cacheable=true} on Apex methods enables the Lightning Component framework to cache the method's return value, reducing server round-trips for the same data.
Lightning Web Components Developer Guide
NEW QUESTION # 84
Users report that a button on a custom Lightning web component (LWC) is not saving the data they enter. The button looks to be clicked, but the LWC simply sits there, seemingly doing nothing.
What should the developer use to ensure error messages are properly displayed?
- A. Add JavaScript and HTML to display an error message.
- B. Add a try-catch block surrounding the DML statement.
- C. Add the <apex:messages/> tag to the component.
- D. Use the Database method with a110rNone Set to false.
Answer: A
Explanation:
To ensure error messages are properly displayed in a Lightning web component, the developer should use JavaScript to handle errors in the component's client-side code and use HTML to display the message on the UI. This can be combined with Apex exception handling for server-side operations.
NEW QUESTION # 85
Universal Containers has an Apex trigger on Account that creates an Account Plan record when an Account is marked as a Customer.
Recently a record-triggered flow was added so that whenever an Account is marked as a Customer, a "Customer Since' date field is updated with today's date. Since the addition of the flow, two Account Plan records are created whenever the Account is marked as a Customer.
What might cause this to happen?
- A. The Apex trigger is not bulk safe and calls insert inside of a for loop.
- B. The flow is configured to evaluate when a record is created and every time it is edited.
- C. The Apex trigger does not use a static variable to ensure it only fires once.
- D. The flow is configured to use an "Update Records' element.
Answer: D
Explanation:
If a flow is configured to evaluate when a record is created and every time it's edited, and an Apex trigger also fires upon the same conditions, it could result in duplicate operations. In this case, two Account Plan records are created because both the flow and the trigger execute upon the Account being marked as a Customer.
NEW QUESTION # 86
Universal Containers (LIC) wants to develop a customer community to help their customers log issues with their containers. The community needs to function for their German- and Spanish-speaking customers also. UC heard that it's easy to create an international community using Salesforce, and hired a developer to build out the site.
What should the developer use to ensure the site is multilingual?
- A. Use custom metadata to translate custom picklist values.
- B. Use custom settings to ensure custom messages are translated properly.
- C. Use custom labels to ensure custom messages are translated properly.
- D. Use custom objects to translate custom picklist values.
Answer: C
Explanation:
Custom labels are used for translating text strings in Salesforce that need to be presented in multiple languages. They support translations and can be referenced in Aura components, Visualforce pages, and Apex code.
NEW QUESTION # 87
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Plat-Dev-301 Test Prep Training Practice Exam Questions Practice Tests: https://drive.google.com/open?id=1sCBEiMxfBlhZ5BeA7VcZ4MWyYrVSHQci
